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The COLOUR of CREATION Observing and Astrophotography Targets “At a Glance” Guide

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The COLOUR of CREATION observing and astrophotography targets “at a glance” guide. (Naked eye, binoculars, small and “monster” scopes) Dear fellow amateur astronomer. Please note - this is a work in progress – compiled from several sources - and undoubtedly WILL contain inaccuracies. It would therefor be HIGHLY appreciated if readers would be so kind as to forward ANY corrections and/ or additions (as the document is still obviously incomplete) to: [email protected]. The document will be updated/ revised/ expanded* on a regular basis, replacing the existing document on the ASSA Pretoria website, as well as on the website: coloursofcreation.co.za . This is by no means intended to be a complete nor an exhaustive listing, but rather an “at a glance guide” (2nd column), that will hopefully assist in choosing or eliminating certain objects in a specific constellation for further research, to determine suitability for observation or astrophotography. There is NO copy right - download at will. Warm regards. JohanM. *Edition 1: June 2016 (“Pre-Karoo Star Party version”). “To me, one of the wonders and lures of astronomy is observing a galaxy… realizing you are detecting ancient photons, emitted by billions of stars, reduced to a magnitude below naked eye detection…lying at a distance beyond comprehension...” ASSA 100. (Auke Slotegraaf). Messier objects. Apparent size: degrees, arc minutes, arc seconds. Interesting info. AKA’s. Emphasis, correction. Coordinates, location. Stars, star groups, etc. Variable stars. Double stars. (Only a small number included. “Colourful Ds. descriptions” taken from the book by Sissy Haas). Carbon star. C Asterisma. (Including many “Streicher” objects, taken from Asterism. ASTRONOMY DELIGHTS). Open (galactic) clusters. Oc. Globular clusters. Gb. Nebulae, including reflection, emission, absorption/ dark. N. Planetary nebulae. Pn. Galaxies and galaxy clusters. Gx. Order listed: @MERIDIAN/ App. SIZE Constellation: Object/ Info. Target Type. Mag. JAN Cae CAELUM SEE-lum The Chisel 01-Jan α Caeli, Alpha Caeli, F-type main-sequence star: suspected Delta Scuti Ds. 4.45+9.8 type variable: exhibiting variations in luminosity as a result of both radial and non-radial pulsations on its surface + a red dwarf spectral class M, also a variable, UV Ceti type (flare star): occasionally undergoes sudden extreme increases in luminosity for a few minutes. β Caeli, Beta Caeli, 3rd brightest star in Caelum, yellow-white F-type main 5.04 sequence dwarf. γ Caeli, Gamma Caeli. Gamma-1, binary: orange K-type red giant, + Ds. 4.5+8th fainter white companion @ 3.1”. PLUS @ 0.22o & Gamma-2, also a double star, a yellow-white F-type giant, Delta Scuti type 6.34+9.6 variable and a companion spectral type F. STREICHER 17, ASTERISM, An arrow is formed with a few stars of Asterism. ? 17’ varying brilliance. The brightest star, magnitude 6.6 (HD 31142/ HIP 22611) is at the eastern end of the arrow shape. The centre comprised of fainter stars, with slightly brighter stars to the tail end, RA 04h51m.3 DEC -34°14’.0 NGC 1679, spiral galaxy located two degrees south of Zeta Caeli. Gx. 11.4 2.7x2’ NGC 1571. Elliptical. Gx. 12.3 1.5x1.2’ NGC 1668, Galaxy, with a mag 14 star @ northern edge. Gx. 12.7 1.5’×1.0’ NGC 1701, Galaxy, extremely small galaxy, mag 9 star close to E end. Gx. 12.8 1.2’×1.0’ IC 2106, Galaxy. Gx. 13 NGC 1585, & a companion galaxy IC 2068 only 11’ NW. Gx. 13 1.3’×0.9’ Cam CAMELOPARDALIS 10-Jan ka-mel-o-PAR-da-lis The Giraffe β Cam, Beta Camelopardalis, brightest in Cam. Double star, primary is a Ds. 4.03 yellow-hued Σ 385, supergiant @1000 ly from earth. (4.0 +8.6) CS Camelopardalis, HIP 16228, 2nd brightest, a binary, blue-white B- Ds. 4.19to4.23 type supergiant + companion @ 2.9”. Located in the reflection nebula vdB & 8.7 14. Is an Alpha Cygni type variable: exhibits non-radial pulsations (which means that some portions of the star’s surface expand while others contract). Σ 1694 (Struve 1694, 32 Cam), Sigma Camelopardalis, binary, white Ds. 5.3 + ? A-type subgiant and a spectroscopic binary that consists of two A-type main sequence stars. 11 Camelopardalis or BV Camelopardalis + 12 Camelopardalis, Ds. 5.2+6.1 HIP 23743, @ 3’, B-type mainsequence (“whitish-lemon”), a Gamma Cassiopeiae type variable star + K-type giant (“citrus orange”). Σ384 + Σ385, “double-double”: “gold + blue…”, sep 2.0” and 2.5”, Ds. x 2. 8.1+8.9 & RA 03h28.5m DEC +590 54’. 4.2+7.8 1 Cam, showcase pair, “pearly white + dim silver”, sep 10.5”, Ds. 5.8+6.8 RA 04h 32m DEC +530 55’. 32 Cam, showcase pair, “pair of lucid-white stars”, sep 21.5”, Ds. 5.3+5.7 RA 12h 49.2m DEC +830 25’. BD Camelopardalis. HIP 17296, carbon star. C S Camelopardalis, HIP 26753, carbon star, period 327 days. C 7.7to11.6 Chain of 6stars - the waterfall - 5.7 + 2.50 NGC1502 (Oc.) + Kemble's Cascade. Oc. + Ast. that ends in the open cluster NGC 1502 (the pool). 5 to 10 Stock 23. Open Cluster. RA 03:16:30.8 Dec +60:02:12 Oc. 5.6 Tombaugh 5, open cluster. RA 3h 47m 42s Dec 59º 04' 59'' Oc. 8.4 17’ NGC 1501. The Blue Oyster nebula. A ring neb. Pn. 11.5 52” IC3568. Planetary nebula. Pn. 12.0 NGC2403. Intermediate spiral. Connected to it is a Neb: NGC2404. Gx. 8.9 & 14.5 IC 342. Intermediate spiral. Gx. 9.1 NGC 2146, The Dusty Hand Galaxy. Barred spiral. Gx. 10.6 5.4x4.5’ NGC 1569, dwarf irregular galaxy, approximately 11 million light years Gx. 11.9 distant, notable for the two super star clusters which it contains. NGC 1530. Barred spiral. Gx. 12.3 4.4x2.5’ Col COLUMBA koh-LUM-bah The Flying Star-Dove 20-Jan α Columbae, Alpha Columbae, Phact, “Ring-necked dove”, blue- Ds. 2.62to2.66 white, spectral type B. Faint optical companion at 13.5”. A suspected + 12.3 Gamma Cassiopeiae type variable. β Columbae, Beta Columbae, Wazn, giant star, spectral class K. 3.1 Ghusn al Zaitun, δ Columbae, Delta Columbae, spectroscopic binary 3.853 - a yellow giant as primary component, spectral class G. The close companion has an orbital period of 2.38 years. γ Columbae, Gamma Columbae, a blue subgiant, class B, located about 4.35 854 light years from the solar system. ε Columbae, Epsilon Columbae, a giant star, spectral class K. 3.875 η Columbae, Eta Culumbae, a yellow-orange giant, spectral type K. 3.946 μ Columbae, Mu Col. Runaway star, expelled from the Iota Orionis 5.15 system in the Trapezium Cluster. Fast rotating: full revolution every 1.5 days, Rare naked eye O-class stars. Asterism (Streicher), situated only 20’ east of mag 4.8 lambda Columbae. Asterism. 9 18’ A handful of stars can be seen in a half square shape with the open end towards the east. RA05h54m.7 DEC-33°47’.3 NGC 2061. Open Cluster. Oc. 11 10’ NGC 1963. Open Cluster. Oc. 11 14’ ESO 424-SC25. Open Cluster. RA 05h49m.8 DEC-32°28’.0 Oc. 10.5 8’ NGC 1851 ASSA15. Bennett 32. Bright core, faint halo. Gb. 7.3 11’ NGC 1808. A barred-spiral,"warped disc". Complex nucleus - (Seyfert Gx. 9.9 Gx = “Normal” looking spirals with quasar-like nuclei: very bright in other wavelengths). NGC 1792.Bennett 29, Spiral Galaxy. Gx. 9.9 5.5’×2.5’ NGC 1808, Bennett 31, Galaxy. Gx. 9.9 5.2’×2.3’ NGC 1892. Spiral. Gx. 10.2 (12.2?) NGC 2090, Galaxy. Gx. 11 4.5’×2.3’ NGC 2188, Galaxy. Gx. 11.6 5.5’×1.0’ IC 2135, Galaxy. Gx. 13 2.8’×0.6’ Dor DORADO doh-RAH-doh The Goldfish 01-Jan Alpha Doradus. α Doradus, Blue-white. A binary star, a giant class A, and 3.26to3.3 a subgiant type B, has an optical companion 77 arc seconds away. (3.8&4.3) β Doradus, Beta Doradus. Bright Cepheid variable star, yellow-tinged 4.1-3.45 supergiant, period of 9 days and 20 hours. Its spectral type varies from F-type to G-type. γ Doradus, Gamma Doradus, serves as a prototype of stars known as the 4.25 Gamma Doradus variables. These stars are pulsating variables whose brightness varies by less than a tenth of a magnitude as a result of nonradial gravity wave oscillations. δ Doradus, Delta Doradus, spectral type A, is notable for being the 4.34 Moon’s South Pole star. ζ Doradus, Zeta Doradus, yellow-white main sequence star of the spectral 4.68 type F, will move to the constellation Pictor around the year 6400 AD. S Doradus. Hypergiant, a prototype of the group S Doradus class of 8.6 – 11.5 variable stars, is the brightest member of the open cluster NGC 1910: latter visible in binoculars as a bright condensation within the main bar of the LMC. Is usually classified as spectral type A, but has the spectrum of a F class star. R Doradus, HIP 21479, a red giant star spectral class M, Mira variable, 4.8to6.6 believed to be the star with the second largest apparent size when observed from Earth, second only to the Sun, period 338 days, RA04h36m.8 DEC-62°05’.0 NGC 2100. In LMC. Approximately round, sometimes mistaken for a Oc. 9.6 globular cluster. NGC 1850. Is a double cluster (Like NGC 868,884?: Per) and a Oc.
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  • Sodium and Potassium Signatures Of

    Sodium and Potassium Signatures Of

    Sodium and Potassium Signatures of Volcanic Satellites Orbiting Close-in Gas Giant Exoplanets Apurva Oza, Robert Johnson, Emmanuel Lellouch, Carl Schmidt, Nick Schneider, Chenliang Huang, Diana Gamborino, Andrea Gebek, Aurelien Wyttenbach, Brice-Olivier Demory, et al. To cite this version: Apurva Oza, Robert Johnson, Emmanuel Lellouch, Carl Schmidt, Nick Schneider, et al.. Sodium and Potassium Signatures of Volcanic Satellites Orbiting Close-in Gas Giant Exoplanets. The Astro- physical Journal, American Astronomical Society, 2019, 885 (2), pp.168. 10.3847/1538-4357/ab40cc. hal-02417964 HAL Id: hal-02417964 https://hal.sorbonne-universite.fr/hal-02417964 Submitted on 18 Dec 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. The Astrophysical Journal, 885:168 (19pp), 2019 November 10 https://doi.org/10.3847/1538-4357/ab40cc © 2019. The American Astronomical Society. Sodium and Potassium Signatures of Volcanic Satellites Orbiting Close-in Gas Giant Exoplanets Apurva V. Oza1 , Robert E. Johnson2,3 , Emmanuel Lellouch4 , Carl Schmidt5 , Nick Schneider6 , Chenliang Huang7 , Diana Gamborino1 , Andrea Gebek1,8 , Aurelien Wyttenbach9 , Brice-Olivier Demory10 , Christoph Mordasini1 , Prabal Saxena11, David Dubois12 , Arielle Moullet12, and Nicolas Thomas1 1 Physikalisches Institut, Universität Bern, Bern, Switzerland; [email protected] 2 Engineering Physics, University of Virginia, Charlottesville, VA 22903, USA 3 Physics, New York University, 4 Washington Place, New York, NY 10003, USA 4 LESIA–Observatoire de Paris, CNRS, UPMC Univ.