DOCSLIB.ORG

Algieba (Γ Leo) Ra(2000)

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Algieba (Γ Leo) Ra(2000) ALGIEBA (g LEO) RA(2000) : 10h 19m 58.4s DEC(2000): +19° 50’ 29.3” BASIC INFORMATION OBJECT TYPE: Binary Star CONSTELLATION: Leo BEST VIEW: Late ApriL DISCOVERY: Known to Ancients DISTANCE: 131 Ly BINARY SEPARATION: 4” (170 AU) ORBITAL PERIOD: ~500 yr. APPARENT MAGNITUDE: 1.98 MESSIER 97 (THE OWL NEBULA) RA(2000) : 11h 14m 48s DEC(2000): +55° 01’ 09” BASIC INFORMATION OBJECT TYPE: Planetary NebuLa CONSTELLATION: Ursa Major BEST VIEW: EarLy May DISCOVERY: Pierre Mechain, 1781 DISTANCE: ~2000 ly DIAMETER: 1.8 Ly APPARENT MAGNITUDE: +9.9 APPARENT DIMENSIONS: 3.3’ THE LEO TRIPLET (M65, M66, NGC 3628) M65 RA(2000) : 11h 18m 56s DEC(2000): +13° 05’ 32” M66 RA(2000) : 11h 20m 15s DEC(2000): +12° 59’ 29” NGC 3628 RA(2000) : 11h 20m 17s DEC(2000): +13° 35’ 22” BASIC INFORMATION OBJECT TYPE: GaLaxy Group CONSTELLATION: Leo BEST VIEW: EarLy May DISCOVERY: CharLes Messier, 1780 (M65 & M66) WiLLiam HerscheL, 1784 (NGC 3628) DISTANCE: 41.1 miLLion ly (M65) 33.6 miLLion Ly (M66) 37.8 miLLion Ly (NGC 3628) DIAMETER: ~117,000 Ly (M65), ~89,000 Ly (M66), ~163,000 Ly (NGC 3628) APPARENT MAGNITUDE: 10.3 (M65), 9.7 (M66), 9.5 (NGC 3628) NGC 4565 RA(2000) : 12h 36m 21s DEC(2000): +25° 59’ 15” BASIC INFORMATION OBJECT TYPE: GaLaxy CONSTELLATION: Coma Berenices BEST VIEW: May DISCOVERY: WiLLiam HerscheL, 1785 DISTANCE: 41 miLLion ly DIAMETER: ~190,000 Ly APPARENT MAGNITUDE: +10.4 APPARENT DIMENSIONS: 16’ x 3’ MESSIER 104 (THE SOMBRERO GALAXY) RA(2000) : 12h 39m 59s DEC(2000): -11° 37’ 23” BASIC INFORMATION OBJECT TYPE: GaLaxy CONSTELLATION: Virgo BEST VIEW: Late May DISCOVERY: Pierre Mechain, 1781 DISTANCE: ~31 miLLion ly DIAMETER: ~80,000 Ly (based on 31 MLy distance) APPARENT MAGNITUDE: +8.0 APPARENT DIMENSIONS: 9’ x 4’ MESSIER 64 (THE BLACK EYE GALAXY) RA(2000) : 12h 56m 43.7s DEC(2000): +21° 40’ 57.6” M64 BASIC INFORMATION OBJECT TYPE: GaLaxy CONSTELLATION: Coma Berenices BEST VIEW: Late May DISCOVERY: Edward Pigott, 1779 DISTANCE: ~17 miLLion ly DIAMETER: ~50,000 Ly APPARENT MAGNITUDE: +8.5 APPARENT DIMENSIONS: Approx. 10’ x 5’ MIZAR & ALCOR MIZAR RA(2000) : 13h 23m 55.5s DEC(2000): +54° 55’ 31.3” ALCOR RA(2000) : 13h 25m 13.5s DEC(2000): +54° 59’ 16.7” BASIC INFORMATION OBJECT TYPE: MuLtiple Star System CONSTELLATION: Ursa Major BEST VIEW: EarLy June DISCOVERY: Known to Ancients DISTANCE: 83 Ly BINARY SEPARATION: ALCOR & MIZAR: 11.8’ (0.3 Ly) MIZAR A & B: 14.4” (367 AU) ALCOR A & B: 1.1” (28 AU) ORBITAL PERIOD: ALCOR & MIZAR: 750,000 yr MIZAR A & B: 5000 yr + ALCOR A & B: 90 yr + APPARENT MAGNITUDE: MIZAR: 2.2, ALCOR: 4.0 NGC 5139 (w CENTAURI) RA(2000) : 13h 26m 47s DEC(2000): -47° 28’ 46” BASIC INFORMATION OBJECT TYPE: GlobuLar CLuster CONSTELLATION: Centaurus BEST VIEW: EarLy June DISCOVERY: Ptolemy, 150 A.D. DISTANCE: 15,800 ly DIAMETER: 175 ly APPARENT MAGNITUDE: +3.9 APPARENT DIMENSIONS: 36’ MESSIER 3 RA(2000) : 13h 42m 11.62s DEC(2000): +28° 22’ 38.2” BASIC INFORMATION OBJECT TYPE: GlobuLar CLuster CONSTELLATION: Canes Venatici BEST VIEW: June DISCOVERY: CharLes Messier, 1764 DISTANCE: 33,900 ly DIAMETER: 180 ly MASS: 450,000 MSUN APPARENT MAGNITUDE: +6.2 APPARENT DIMENSIONS: 18’ MESSIER 51 (THE WHIRLPOOL GALAXY) RA(2000) : 13h 29m 53s DEC(2000): +47° 11’ 43” BASIC INFORMATION OBJECT TYPE: GaLaxy CONSTELLATION: Canes Venatici BEST VIEW: June DISCOVERY: CharLes Messier, 1773 DISTANCE: ~25 miLLion ly DIAMETER: ~80,000 Ly (visibLe disk @ 25 MLy) APPARENT MAGNITUDE: +8.4 APPARENT DIMENSIONS: 11’ x 7’ MESSIER 5 RA(2000) : 15h 18m 33.2s DEC(2000): +02° 04’ 51.7” BASIC INFORMATION OBJECT TYPE: GlobuLar CLuster CONSTELLATION: Serpens BEST VIEW: EarLy JuLy DISCOVERY: Gottfried Kirch, 1702 DISTANCE: 24,500 Ly DIAMETER: 165 ly MASS: 834,000 MSUN APPARENT MAGNITUDE: +5.6 APPARENT DIMENSIONS: 23’ AGE: 12-13 biLLion years MESSIER 4 RA(2000) : 16h 23m 35.2s DEC(2000): -26° 31’ 32.7” BASIC INFORMATION OBJECT TYPE: GlobuLar CLuster CONSTELLATION: Scorpius BEST VIEW: JuLy DISCOVERY: PhiLippe Loys de Chéseaux, 1746 DISTANCE: 5600 – 7200 Ly DIAMETER: 75 ly MASS: 450,000 MSUN APPARENT MAGNITUDE: +5.6 APPARENT DIMENSIONS: 36’ AGE: 12-13 biLLion years MESSIER 13 RA(2000) : 16h 41m 42s DEC(2000): +36° 27’ 41” BASIC INFORMATION OBJECT TYPE: GlobuLar CLuster CONSTELLATION: HercuLes BEST VIEW: Late JuLy DISCOVERY: Edmond HaLLey, 1714 DISTANCE: 25,100 ly DIAMETER: 145 ly APPARENT MAGNITUDE: +5.8 APPARENT DIMENSIONS: 20’ Starry Night FOV: 1.00 Lyra FOV: 60.00 Libra MESSIER 6 (Butterfly Cluster) h m s RA(2000) : Ophiuchus17 40 20 DEC(2000): -32° 15’ 12” M6 Sagitta Serpens Cauda Vulpecula Scutum Scorpius Aquila M6 FOV: 5.00 Telrad Delphinus Norma Sagittarius Corona Australis Ara Equuleus M6 Triangulum Australe BASIC INFORMATION OBJECT TYPE: Open CLuster Telescopium CONSTELLATION: Scorpius Capricornus BEST VIEW: August DISCOVERY: Giovanni Batista Hodierna, c. 1654 DISTANCE: 1600 Ly DIAMETER: 12 – 25 Ly Pavo MicroscopiumAPPARENT MAGNITUDE: +4.2 APPARENT DIMENSIONS: 25’ – 54’ AGE: 50 – 100 miLLion years Telrad Indus MESSIER 7 (Ptolemy’s Cluster) RA(2000) : 17h 53m 51s DEC(2000): -34° 47’ 36” BASIC INFORMATION OBJECT TYPE: Open CLuster CONSTELLATION: Scorpius BEST VIEW: August DISCOVERY: Claudius PtoLemy, 130 A.D. DISTANCE: 900 – 1000 Ly DIAMETER: 20 – 25 Ly APPARENT MAGNITUDE: +3.3 APPARENT DIMENSIONS: 80’ AGE: ~220 million years FOV:Starry 1.00Night FOV: 60.00 Hercules Libra MESSIER 8 (THE LAGOON NEBULA) RA(2000) : 18h 03m 37s DEC(2000): -24° 23’ 12” Lyra M8 Ophiuchus Serpens Cauda Cygnus Scorpius Sagitta M8 FOV: 5.00 Scutum Telrad Vulpecula Aquila Ara Corona Australis Sagittarius Delphinus M8 BASIC INFORMATION Telescopium OBJECT TYPE: Star Forming Region CONSTELLATION: Sagittarius Equuleus BEST VIEW: August DISCOVERY: Hodierna, 1654 (nebuLa) Le GentiL, 1747 (nebuLa & cLuster) DISTANCE: 4000 – 6000 Ly Capricornus DIAMETER: Approximately 130 ly x 60 Ly APPARENT MAGNITUDE: +Microscopium6.0 APPARENT DIMENSIONS: 90’x40’ Telrad Indus MESSIER 20 (THE TRIFID NEBULA) RA(2000) : 18h 02m 42s DEC(2000): -22° 58’ 18” BASIC INFORMATION OBJECT TYPE: Star Forming Region CONSTELLATION: Sagittarius BEST VIEW: August DISCOVERY: Messier, 1764 DISTANCE: ~5200 Ly DIAMETER: 42 Ly APPARENT MAGNITUDE: +9.0 APPARENT DIMENSIONS: 11’ MESSIER 17 (THE SWAN NEBULA) RA(2000) : 18h 20m 47s DEC(2000): -16° 10’ 18” BASIC INFORMATION OBJECT TYPE: Star Forming Region CONSTELLATION: Sagittarius BEST VIEW: Late August DISCOVERY: PhiLippe Loys deCheseaux, 1745 DISTANCE: 5200 – 6800 Ly DIAMETER: 15 – 20 Ly APPARENT MAGNITUDE: +6.0 APPARENT DIMENSIONS: 11’ FOV:Starry 1.00Night FOV: 60.00 Sagitta Vulpecula Ophiuchus M22 Serpens Cauda MESSIER 22 RA(2000) : 18h 36m 23.9s DEC(2000): -23° 54’ 17.1” Aquila Delphinus Scutum Equuleus M22 FOV: 5.00 Scorpius Telrad Pegasus Sagittarius Corona Australis Capricornus Ara M22 BASIC INFORMATION OBJECT TYPE: GlobuLar CLuster CONSTELLATION: Sagittarius BEST VIEW: Late August DISCOVERY: Abraham Ihle, 1665 Telescopium DISTANCE: 10,400 ly MicroscopiumDIAMETER: 97 ly APPARENT MAGNITUDE: +5.1 Aquarius APPARENT DIMENSIONS: 32’ Pavo Piscis Austrinus Telrad Indus EPSILON LYRAE (e LYR or “THE DOUBLE DOUBLE”) e1 RA(2000) : 18h 44m 20.3s DEC(2000): +39° 40’ 20” e2 RA(2000) : 18h 44m 22.8s DEC(2000): +39° 36’ 46” BASIC INFORMATION OBJECT TYPE: MuLtipLe Star System CONSTELLATION: Lyra BEST VIEW: Late August DISCOVERY: F.G.W. Struve, 1831 DISTANCE: 163 ly AVG. BINARY SEPARATION: e = 208” (>10,000 AU), e1 = 2.8” (235 AU), e2 = 2.2” (145 AU) ORBITAL PERIOD: e = At least 400,000 years, e1 ~ 1800 years, e2 ~724 years APPARENT MAGNITUDE: 3.8 MESSIER 57 (THE RING NEBULA) RA(2000) : 18h 53m 35s DEC(2000): +33° 01’ 45” BASIC INFORMATION OBJECT TYPE: Planetary NebuLa CONSTELLATION: Lyra BEST VIEW: Late August DISCOVERY: CharLes Messier, 1779 DISTANCE: 2300 ly DIAMETER: 0.9 Ly (bright ring), 2.5 Ly (IR haLo) APPARENT MAGNITUDE: +8.8 (nebuLa) +15.7 (central star) APPARENT DIMENSIONS: 1.4’ x 1.0’ MESSIER 11 (The Wild Duck Cluster) RA(2000) : 18h 51m 05s DEC(2000): -06° 16’ 12” BASIC INFORMATION OBJECT TYPE: Open CLuster CONSTELLATION: Scutum BEST VIEW: September DISCOVERY: Gottfried Kirch, 1681 DISTANCE: Approx. 6000 Ly DIAMETER: Approx. 50 Ly APPARENT MAGNITUDE: +6.3 APPARENT DIMENSIONS: 14’ AGE: Approx. 220 million years ALBIREO (b CYG) RA(2000) : 19h 30m 43s DEC(2000): +27° 57’ 35” BASIC INFORMATION OBJECT TYPE: DoubLe Star CONSTELLATION: Cygnus BEST VIEW: Late September DISCOVERY: Known to Ancients DISTANCE: Albireo A = 328 ly Albireo B = 389 ly APPARENT MAGNITUDE: 3.1 MESSIER 27 (THE DUMBBELL NEBULA) RA(2000) : 19h 59m 36.4s DEC(2000): +22° 43’ 15.8” BASIC INFORMATION OBJECT TYPE: Planetary NebuLa CONSTELLATION: VuLpecuLa BEST VIEW: EarLy October DISCOVERY: CharLes Messier, 1764 DISTANCE: 1360 Ly DIAMETER: 3 Ly APPARENT MAGNITUDE: +7.4 APPARENT DIMENSIONS: 8.0’ x 5.7’ MESSIER 15 RA(2000) : 21h 29m 58s DEC(2000): +12° 10’ 01” BASIC INFORMATION OBJECT TYPE: GlobuLar CLuster CONSTELLATION: Pegasus BEST VIEW: Late October DISCOVERY: Jean-Dominique MaraLdi, 1746 DISTANCE: 33,600 ly DIAMETER: 175 ly APPARENT MAGNITUDE: +6.2 APPARENT DIMENSIONS: 18’ .
Load more

Recommended publications
  • MESSIER 13 RA(2000) : 16H 41M 42S DEC(2000): +36° 27'
    MESSIER 13 RA(2000) : 16h 41m 42s DEC(2000): +36° 27’ 41” BASIC INFORMATION OBJECT TYPE: Globular Cluster CONSTELLATION: Hercules BEST VIEW: Late July DISCOVERY: Edmond Halley, 1714 DISTANCE: 25,100 ly DIAMETER: 145 ly APPARENT MAGNITUDE: +5.8 APPARENT DIMENSIONS: 20’ Starry Night FOV: 1.00 Lyra FOV: 60.00 Libra MESSIER 6 (Butterfly Cluster) RA(2000) : 17Ophiuchus h 40m 20s DEC(2000): -32° 15’ 12” M6 Sagitta Serpens Cauda Vulpecula Scutum Scorpius Aquila M6 FOV: 5.00 Telrad Delphinus Norma Sagittarius Corona Australis Ara Equuleus M6 Triangulum Australe BASIC INFORMATION OBJECT TYPE: Open Cluster Telescopium CONSTELLATION: Scorpius Capricornus BEST VIEW: August DISCOVERY: Giovanni Batista Hodierna, c. 1654 DISTANCE: 1600 ly MicroscopiumDIAMETER: 12 – 25 ly Pavo APPARENT MAGNITUDE: +4.2 APPARENT DIMENSIONS: 25’ – 54’ AGE: 50 – 100 million years Telrad Indus MESSIER 7 (Ptolemy’s Cluster) RA(2000) : 17h 53m 51s DEC(2000): -34° 47’ 36” BASIC INFORMATION OBJECT TYPE: Open Cluster CONSTELLATION: Scorpius BEST VIEW: August DISCOVERY: Claudius Ptolemy, 130 A.D. DISTANCE: 900 – 1000 ly DIAMETER: 20 – 25 ly APPARENT MAGNITUDE: +3.3 APPARENT DIMENSIONS: 80’ AGE: ~220 million years FOV:Starry 1.00Night FOV: 60.00 Hercules Libra MESSIER 8 (THE LAGOON NEBULA) RA(2000) : 18h 03m 37s DEC(2000): -24° 23’ 12” Lyra M8 Ophiuchus Serpens Cauda Cygnus Scorpius Sagitta M8 FOV: 5.00 Scutum Telrad Vulpecula Aquila Ara Corona Australis Sagittarius Delphinus M8 BASIC INFORMATION Telescopium OBJECT TYPE: Star Forming Region CONSTELLATION: Sagittarius Equuleus BEST
    [Show full text]
  • Messier Objects
    Messier Objects From the Stocker Astroscience Center at Florida International University Miami Florida The Messier Project Main contributors: • Daniel Puentes • Steven Revesz • Bobby Martinez Charles Messier • Gabriel Salazar • Riya Gandhi • Dr. James Webb – Director, Stocker Astroscience center • All images reduced and combined using MIRA image processing software. (Mirametrics) What are Messier Objects? • Messier objects are a list of astronomical sources compiled by Charles Messier, an 18th and early 19th century astronomer. He created a list of distracting objects to avoid while comet hunting. This list now contains over 110 objects, many of which are the most famous astronomical bodies known. The list contains planetary nebula, star clusters, and other galaxies. - Bobby Martinez The Telescope The telescope used to take these images is an Astronomical Consultants and Equipment (ACE) 24- inch (0.61-meter) Ritchey-Chretien reflecting telescope. It has a focal ratio of F6.2 and is supported on a structure independent of the building that houses it. It is equipped with a Finger Lakes 1kx1k CCD camera cooled to -30o C at the Cassegrain focus. It is equipped with dual filter wheels, the first containing UBVRI scientific filters and the second RGBL color filters. Messier 1 Found 6,500 light years away in the constellation of Taurus, the Crab Nebula (known as M1) is a supernova remnant. The original supernova that formed the crab nebula was observed by Chinese, Japanese and Arab astronomers in 1054 AD as an incredibly bright “Guest star” which was visible for over twenty-two months. The supernova that produced the Crab Nebula is thought to have been an evolved star roughly ten times more massive than the Sun.
    [Show full text]
  • Remote Video Astronomy Group MECATX Sky Tour June 2019
    Remote Video Astronomy Group MECATX Sky Tour June 2019 1) Scorpius (SCOR-pee-us), the Scorpion - June 3 2) Serpens (SER-punz), the Serpent - June 6 3) Ara (AR-uh), the Altar - June 10 4) Ophiuchus (OFF-ee-YOO-kus), the Serpent Bearer - June 11 5) Hercules (HER-kyuh-leez), the Hercules - June 13 6) Corona Australis (cuh-ROE-nuh aw-STRAL-iss), the Southern Crown - June 30 MECATX RVA June 2019 - www.mecatx.ning.com – Youtube – MECATX – www.ustream.tv – dfkott Revised by: Samantha Salvador 05.26.2019 June 3 Scorpius (SCOR-pee-us), the Scorpion Sco, Scorpii (SCOR-pee-eye) MECATX RVA June 2019 - www.mecatx.ning.com – Youtube – MECATX – www.ustream.tv – dfkot 1 Scorpius Meaning: The Scorpion Pronunciation: skor' pee us Abbreviation: Sco Possessive form: Scorpii (skor' pee ee) Asterisms: The Fish Hook Bordering constellations: Ara, Corona Australis, Libra, Lupus, Norma, Ophiuchus, Sagittarius Overall brightness: 12.480 (10) Central point: RA = 16h49m Dec. = —27° Directional extremes: N = —8° 5= —46° E = 17h55m W = 15h44m Messier objects: M4, M6, M7, M80 Meteor showers: a Scorpiids (3 May) x Scorpiids (5 Jun) Midnight culmination date: 3 Jun Bright stars: a (15), X, (25), 0 (39), c (72), 8 (76), K (81), P. (93), D (111), t (129), n (146), a (147), 11 (176), µ1 (182) Named stars: Acrab (13), Al Niyat (a), Al Niyat (T), Antares (a), Dschubba (8), Graffias (c), Jabbah (v), Lesath (v), Sargas (0), Shaula (X), Vespertilio (a) Near stars: LFT 1358 (33), HD 156384 A-B-C (88), LFT 1266-1267 (102) Size: 496.78 square degrees (1.204% of the sky) Rank in size: 33 Solar conjunction date: 4 Dec Visibility: completely visible from latitudes: S of +44° completely invisible from latitudes: N of +82° Visible stars: (number of stars brighter than magnitude 5.5): 62 Interesting facts: (1) In ancient times, Scorpius also contained the stars of the present day constellation of Libra, the Scales.
    [Show full text]
  • Observer Page 2 of 14
    AAAssstttrrrooonnnooomyyy CCCllluuubbb ooofff TTTuuulllsssaaa OOOOOObbbbbbsssssseeeeeerrrrrrvvvvvveeeeeerrrrrr October 2009 Messier 15 Jean-Dominique Maraldi discovered M15 on September 7, 1746. He described it as 'A nebulous star, fairly bright and composed of many stars'. Charles Messier, who cataloged it on June 3, 1764, and Johann Bode couldn't make this out and described it as 'nebula without stars,' so that it remained to William Herschel in 1783 to resolve this fine star cluster. M15 was the first globular cluster in which a planetary nebula, Pease 1 or K 648 ("K" for "Kuster"), could be identified (Pease 1928, on photographic plates taken at Mt. Wilson in 1927). M15 can be found extremely easily: First find the 2nd magnitude star Epsilon Pegasi, and Theta Pegasi SE of it. Follow the line from Theta over Epsilon and find M15 3 1/2 deg W and 2 1/4 deg N of Epsilon. A 6th magnitude star is about 20' away to the East; another one of magnitude 7.5 is about 5' to the NNE. With its apparent visual brightness of magnitude 6.2, M15 is about at the limit of visibility for the naked eye under very good conditions. The slightest optical aid, opera glass or small binoculars, reveals it as a round nebulous object. It appears as a round mottled nebula in 4-inch telescopes, with at best the very brightest stars visible, but otherwise unresolved in a fine star field. Be sure to catch & log M15 this month! Inside This Issue: Important ACT Upcoming Dates: October Calendar - - - - - - p2 Misc. News - - - - - - - - - - p6 ACT Monthly Meeting @ Bass Pro - Fri, Oct.
    [Show full text]
  • Kent Sundell Compiled the Field Logs
    AAPG TOTAL SOLAR ECLIPSE SEMINAR FIELD GUIDE to: Impact Craters and Outcrops of the K-T Boundary Casper, Wyoming USA August 18-22, 2017 Published July 28, 2017 2 | P a g e AAPG TOTAL SOLAR ECLIPSE SEMINAR FIELD GUIDE CONTENTS Itinerary………………………………………………………………Page 5 Instructor Bios…………………………………………………….Page 9 Packing List Field Gear…..……………………………………Page 13 Field Safety…………………………………………………………Page 14 Casper Area Geologic Map………………………………….Page 16 Casper Area Sat. Images……………………………………..Page 17 Wyoming Stratigraphic Nomenclature Chart……….Page 19 Field Day 1- August 19, 2017………………………………Page 21 Trip Log Salt Creek, WY Cretaceous Fossils..Page 24 Trip Log Linch/Sussex, WY K/T Boundary…..Page 29 Field Day 2- August 20, 2017…………………………..….Page 31 Paleontology and Geology of the White River Formation……………………. Page 40 Trip Log Douglas, WY Impact Craters…………Page 45 Trip Log White River Fm. Fossils………………..Page 47 Star Gazing Guide……………………………………………….Page 49 Field Day 3- August 21, 2017……………………………….Page 56 Total Solar Eclipse- Isaak Walton Lodge, Casper Additional Literature on the Subjects Covered…..Page 73 3 | P a g e ACKNOWLEDGEMENTS This Field Guide was compiled by Doug Cook who accepts all responsibility for mistakes, errors, and omissions. Kent Sundell compiled the field logs. Special thanks to Jack Schmitt and Jim Reilly whose tireless participation and enthusiasm in AAPG Astrogeology events give us their professional perspective and expertise. We owe mountains of gratitude to Kent Sundell, Casper College, staff and students for organizing, guiding, and operating the field trips in this Seminar. Thanks to Don Clarke whose eclipse experience, ideas, and Casper connections were the catalyst for the AAPG Eclipse Seminar.
    [Show full text]
  • The Midnight Sky: Familiar Notes on the Stars and Planets, Edward Durkin, July 15, 1869 a Good Way to Start – Find North
    The expression "dog days" refers to the period from July 3 through Aug. 11 when our brightest night star, SIRIUS (aka the dog star), rises in conjunction* with the sun. Conjunction, in astronomy, is defined as the apparent meeting or passing of two celestial bodies. TAAS Fabulous Fifty A program for those new to astronomy Friday Evening, July 20, 2018, 8:00 pm All TAAS and other new and not so new astronomers are welcome. What is the TAAS Fabulous 50 Program? It is a set of 4 meetings spread across a calendar year in which a beginner to astronomy learns to locate 50 of the most prominent night sky objects visible to the naked eye. These include stars, constellations, asterisms, and Messier objects. Methodology 1. Meeting dates for each season in year 2018 Winter Jan 19 Spring Apr 20 Summer Jul 20 Fall Oct 19 2. Locate the brightest and easiest to observe stars and associated constellations 3. Add new prominent constellations for each season Tonight’s Schedule 8:00 pm – We meet inside for a slide presentation overview of the Summer sky. 8:40 pm – View night sky outside The Midnight Sky: Familiar Notes on the Stars and Planets, Edward Durkin, July 15, 1869 A Good Way to Start – Find North Polaris North Star Polaris is about the 50th brightest star. It appears isolated making it easy to identify. Circumpolar Stars Polaris Horizon Line Albuquerque -- 35° N Circumpolar Stars Capella the Goat Star AS THE WORLD TURNS The Circle of Perpetual Apparition for Albuquerque Deneb 1 URSA MINOR 2 3 2 URSA MAJOR & Vega BIG DIPPER 1 3 Draco 4 Camelopardalis 6 4 Deneb 5 CASSIOPEIA 5 6 Cepheus Capella the Goat Star 2 3 1 Draco Ursa Minor Ursa Major 6 Camelopardalis 4 Cassiopeia 5 Cepheus Clock and Calendar A single map of the stars can show the places of the stars at different hours and months of the year in consequence of the earth’s two primary movements: Daily Clock The rotation of the earth on it's own axis amounts to 360 degrees in 24 hours, or 15 degrees per hour (360/24).
    [Show full text]
  • What Has Hubble Learned from Star Clusters? Visual Notes
    Hubblecast 69: What has Hubble learned from star clusters? Visual notes 00:00 [Narrator] 1. Star clusters hang like sparkling firework displays in the sky, making them favourite observational targets for astronomers. Hubble has observed its fair share of these cosmic baubles, imaging and studying them to explore their secrets. This new image from Hubble shows a globular cluster known as Messier 15. As well as containing over 100 000 old stars, this cluster hosts something dark and mysterious at its heart. 00:39 2. Intro 01:0 [Narrator] 3. Star clusters are some of the most beautiful objects in our skies. Hubble has viewed many of these over the years — but it is not all style over substance. These clusters are incredibly useful to the astronomers studying them. What can they tell us about our Universe? 01:24 [Narrator] 4. There are two main types of star cluster: open, and globular. Most stars, including the Sun, are thought to have formed within open star clusters — groups of thousands of stars loosely bound together by gravity, destined to be spread throughout their host galaxy once the cluster matures and most of its gas disperses. Globular clusters are different; they are huge balls of old stars that orbit the centres of galaxies. Many of them were once little galaxies, cannibalised by their larger companions over the history of the Universe. 02:16 [Narrator] 5. Hubble has explored many globular clusters. The Milky Way alone has over 150 of these starry satellites, and Hubble’s sharp vision can resolve the individual stars.
    [Show full text]
  • Astronomy Magazine Special Issue
    γ ι ζ γ δ α κ β κ ε γ β ρ ε ζ υ α φ ψ ω χ α π χ φ γ ω ο ι δ κ α ξ υ λ τ μ β α σ θ ε β σ δ γ ψ λ ω σ η ν θ Aι must-have for all stargazers η δ μ NEW EDITION! ζ λ β ε η κ NGC 6664 NGC 6539 ε τ μ NGC 6712 α υ δ ζ M26 ν NGC 6649 ψ Struve 2325 ζ ξ ATLAS χ α NGC 6604 ξ ο ν ν SCUTUM M16 of the γ SERP β NGC 6605 γ V450 ξ η υ η NGC 6645 M17 φ θ M18 ζ ρ ρ1 π Barnard 92 ο χ σ M25 M24 STARS M23 ν β κ All-in-one introduction ALL NEW MAPS WITH: to the night sky 42,000 more stars (87,000 plotted down to magnitude 8.5) AND 150+ more deep-sky objects (more than 1,200 total) The Eagle Nebula (M16) combines a dark nebula and a star cluster. In 100+ this intense region of star formation, “pillars” form at the boundaries spectacular between hot and cold gas. You’ll find this object on Map 14, a celestial portion of which lies above. photos PLUS: How to observe star clusters, nebulae, and galaxies AS2-CV0610.indd 1 6/10/10 4:17 PM NEW EDITION! AtlAs Tour the night sky of the The staff of Astronomy magazine decided to This atlas presents produce its first star atlas in 2006.
    [Show full text]
  • A Basic Requirement for Studying the Heavens Is Determining Where In
    Abasic requirement for studying the heavens is determining where in the sky things are. To specify sky positions, astronomers have developed several coordinate systems. Each uses a coordinate grid projected on to the celestial sphere, in analogy to the geographic coordinate system used on the surface of the Earth. The coordinate systems differ only in their choice of the fundamental plane, which divides the sky into two equal hemispheres along a great circle (the fundamental plane of the geographic system is the Earth's equator) . Each coordinate system is named for its choice of fundamental plane. The equatorial coordinate system is probably the most widely used celestial coordinate system. It is also the one most closely related to the geographic coordinate system, because they use the same fun­ damental plane and the same poles. The projection of the Earth's equator onto the celestial sphere is called the celestial equator. Similarly, projecting the geographic poles on to the celest ial sphere defines the north and south celestial poles. However, there is an important difference between the equatorial and geographic coordinate systems: the geographic system is fixed to the Earth; it rotates as the Earth does . The equatorial system is fixed to the stars, so it appears to rotate across the sky with the stars, but of course it's really the Earth rotating under the fixed sky. The latitudinal (latitude-like) angle of the equatorial system is called declination (Dec for short) . It measures the angle of an object above or below the celestial equator. The longitud inal angle is called the right ascension (RA for short).
    [Show full text]
  • OBSERVING BASICS by GUY MACKIE
    OBSERVING BASICS by GUY MACKIE Observing Reports The colorful and detailed photographs we see of celestial objects are not at all like the ubiquitous "fuzzy blobs" we see at the eyepiece. Nevertheless, you are freezing your buns off and loosing much needed sleep for work, the next day so why not make a description of your observations that will make the hunt worthwhile. Here are some suggestions to fill the empty spaces in your logbook and to imprint the observing experience more deeply in your memory. The Basics Your website www.m51.ca has a downloadable log sheet template that is just super, but you can also make up one for yourself or customize the website version to your own needs. The main things to start your report should be the circumstances under which you observed: Observing Location Time (of observing session and of the observation of each object) Optics (type of instrument, eyepiece, filters, power of magnification) Transparency (page 56 of the Observers Handbook) Seeing (for me this is a subjective rating of the atmospheric stability based on Planet features and double star observations) It is good to know the field of view (FOV) of each of your eyepieces in minutes of degree, then you can estimate the approximate size of the object. The sketchpad I use has the FOV for every eyepiece I use taped to the back, a handy reference. To calculate your field of view there are websites that will punch out the both the magnification and the FOV for most eyepieces. You can do it yourself: With any motor drives turned off, place a star near the celestial equator just outside the field of view in the eyepiece so that it will drift across the middle of the field of view.
    [Show full text]
  • MONTHLY OBSERVER's CHALLENGE Las Vegas
    MONTHLY OBSERVER’S CHALLENGE Las Vegas Astronomical Society Compiled by: Roger Ivester, Boiling Springs, North Carolina & Fred Rayworth, Las Vegas, Nevada With special assistance from: Rob Lambert, Alabama OCTOBER 2017 Messier 15 (NGC-7078) “Sharing Observations and Bringing Amateur Astronomers Together” Introduction The purpose of the Observer’s Challenge is to encourage the pursuit of visual observing. It’s open to everyone that’s interested, and if you’re able to contribute notes, and/or drawings, we’ll be happy to include them in our monthly summary. We also accept digital imaging. Visual astronomy depends on what’s seen through the eyepiece. Not only does it satisfy an innate curiosity, but it allows the visual observer to discover the beauty and the wonderment of the night sky. Before photography, all observations depended on what the astronomer saw in the eyepiece, and how they recorded their observations. This was done through notes and drawings, and that’s the tradition we’re stressing in the Observers Challenge. We’re not excluding those with an interest in astrophotography, either. Your images and notes are just as welcome. The hope is that you’ll read through these reports and become inspired to take more time at the eyepiece, study each object, and look for those subtle details that you might never have noticed before. Messier 15 (NGC-7078) Messier 15, also known as NGC-7078, was discovered by Jean-Dominique Maraldi in 1746. Charles Messier added it to his catalog of non-comets in 1764. It lies about 33.6K light-years from earth and is about twelve billion years old, which makes it one of the oldest known globular clusters.
    [Show full text]
  • The Leo-I Group: New Dwarf Galaxy and UDG Candidates Oliver Müller1, Helmut Jerjen2, and Bruno Binggeli1
    Astronomy & Astrophysics manuscript no. aanda c ESO 2018 February 26, 2018 The Leo-I group: new dwarf galaxy and UDG candidates Oliver Müller1, Helmut Jerjen2, and Bruno Binggeli1 1 Departement Physik, Universität Basel, Klingelbergstr. 82, CH-4056 Basel, Switzerland e-mail: [email protected] 2 Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611, Australia Received XX, 2018; accepted TBD ABSTRACT Context. The study of dwarf galaxies and their environments provides crucial testbeds for predictions of cosmological models and insights on the structure formation on small cosmological scales. In recent years, many problems on the scale of groups of galaxies challenged the current standard model of cosmology. Aims. We aim to increase the sample of known galaxies in the Leo-I group, containing the M 96 subgroup and the Leo Triplet. This galaxy aggregate is located at the edge of the Local Volume at a mean distance of 10.7 Mpc. Methods. We employ image enhancing techniques to search for low-surface brightness objects in publicly available gr images taken by the Sloan Digital Sky Survey within 500 square degrees around the Leo-I group. Once detected, we perform surface photometry and compare their structural parameters to other known dwarf galaxies in the nearby universe. Results. We found 36 new dwarf galaxy candidates within the search area. Their morphology and structural parameters resemble known dwarfs in other groups. Among the candidates 5 to 6 galaxies are considered as ultra diffuse galaxies candidates. If confirmed, they would be some of the closest examples of this galaxy type.
    [Show full text]