DOCSLIB.ORG

Meteor Shower Date Peak Dates

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Meteor Shower Date Peak Dates Abstract ID - Th1-P009 ATMOSPHERIC AEROSOLS AND DIFFERENT TYPES OF METEOR SHOWERS Ajinkya Kakade, Sumedh Mane, Pratibha Mane. Department of Physics, Fergusson College, Pune-411 004, Maharashtra state, India Introduction Medium Level Meteor Shower Low Level Meteor Shower Atmospheric aerosols are minute particles (10-9 to 10-4 m) suspended Zenith Hour Rate - Between 2 to 10 Meteors. Zenith Hour Rate - Less Than And Equal To 2 Meteors. in various layers of earth’s atmosphere. During meteor showers, huge Meteor Shower Date Peak Dates amount of cosmic debris called meteoroids enters into the Earth’s Alpha Centaurids (7th Feb 2009) Alpha Centaurids (8th Feb 2011) atmosphere. These particles contributes to aerosols in the Delta Velids Jan 22 –Feb 21(2009) 5 February 2009 mesosphere. An attempt is made to study correlation between the Beta Herculids Feb 10 -Feb 14(2011) 13 February 2011 mesospheric Aerosol Number Density in per dm3 (AND) and Meteor Gamma Normids Feb 25 -March 13(2011) 13 March 2011 Showers of medium-level (ZHR in between 2-10) and meteor Delta Velids Beta Herculids 160 E13/02/11 160 M14/02/11 showers of low-level (ZHR˂2) also. The observations were carried M14/02/11 M15/02/11 out at tropical station Kolhapur (16°42′N, 74°14′E) during the period 140 140 1 January 2009 to 31 December 2011. 120 120 100 100 M14/02/11 160 M15/02/11 Altitude (Km) Altitude th th 140 CBE: Coma Berenicids (20 Dec 2009) CBE: Coma Berenicids (20 Dec 2010) 80 (Km) Altitude 80 120 100 60 60 Altitude (Km) Altitude 80 40 40 60 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 40 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 AND AND AND 160 160 E13/02/11 160160 M14/02/11E13/02/11M15/02/11 160 M14/02/11 M 15/02/11 E15/02/11 E15/02/11 M14/02/11 M15/02/11M14/02/11 M15/02/11 160 140 140 140140140 140 120 100 120120 120 120 120 Altitude (Km) 80 60 100100 100 100 100 M14/02/11 M14/02/11 40 160 M15/02/11 160 M15/02/11 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Altitude (Km) Altitude Altitude (Km) Altitude AND 140 140 Altitude (Km) Altitude 80 (Km) Altitude 80 (Km) Altitude 8080 80 120 120 100 100 th 60 606060 60 Altitude (Km) Altitude Alpha Crucids (15 Jan 2009) (Km) Altitude Delta Cancrids (17 Jan 2009) 80 80 60 40 404040 40 60 0.10.1 0.20.2 0.30.3 0.40.4 0.5 0.6 0.7 0.80.8 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 E04/02/09 0.1 0.2 0.3 0.4 0.5 M05/02/090.6 0.7 0.8 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 40 40 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 M05/02/09 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 100 100 M06/02/09 AND AND AND AND AND AND Methodology 160 160 M15/02/11 M15/02/11 M 15/02/11 M 15/02/11 E15/02/11 160 E15/02/11 E15/02/11 160 E15/02/11 140 140 140 140 80 80 Basic Principle 120 120 100 120 100 120 Altitude (Km) Altitude (Km) 80 • Sun is within 0-18º below the horizon. 80 60 60 Altitude (Km) (Km) (Km) Altitude Altitude Altitude Altitude (Km) Altitude 100 Altitude (Km) (Km) (Km) Altitude Altitude Altitude Altitude (Km) Altitude 100 60 60 40 • 40 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 The solar radiation scans the Earth’s atmosphere during the 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 AND AND Altitude (Km) Altitude 80 enhancement of the twilight. (Km) Altitude 80 60 60 • Light received from any part of the sky is primarily due to the light 40 40 AND 0.1 0.2 0.3 0.4 0.5 0.6 0.7 40 40 AND scattered by the illuminated molecules and the particles of interest. th 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 PUP : Puppid /Velids (7th Dec 2011) COM: Coma Berenicids (29 Dec 2010) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 M06/02/09 AND AND E06/02/09 E06/02/09 • The height of this lowest layer called twilight layer, increases with 100 100 E07/02/09 increasing earth's shadow height. Gamma Normids • Scattered light comes more and more from the higher altitudes 80 80 Altitude (Km) (Km) (Km) (Km) Altitude Altitude Altitude Altitude Altitude (Km) (Km) (Km) (Km) Altitude Altitude Altitude Altitude 60 60 40 40 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.1 0.2 0.3 0.4 0.5 0.6 0.7 AND AND Observations and Results Observations and Results Meteors Observations • In title of graphs we see the peak dates of respective meteor showers. On the Delta • Increased in AND observed in the morning of peak date • Measured time ‘t’ in terms of ‘seconds’ and intensity ‘I’ in terms of peak dates or just after the peak dates we get to see the increment in AND Velids from height of 70-90 km and slightly increased till the ‘volts’. starting with higher altitudes and then later in lower altitudes. morning of next day. • Observation time converted to solar zenith angle Z. • There are specific number of AND at respective altitudes which are not altered • AND decreased on next day of peak dates. Aerosols • unless such events occur. So before and after meteor showers we can see the The vertical height ‘h’ from the surface of the earth, of a point where settled at height of 40-50 km. normal distribution of AND w.r.t. altitudes. the solar ray grazing the surface of the earth meets the line of slight. • Overall increased in AND observed in the range of 50-100 • Frist two figures indicates the graphical interpretation of AND distribution just • ‘R’ is radius of earth and ‘δ’ is sun's depression 푝푎푟푡푖푐푙푒/푑푚3. before, after and on the day of Alpha Centaurids of year 2009 and 2011. In Earth’s Shadow Height both the graphs we see red curve is shifted slightly whereas blue and green Beta • Increased in AND observed after the peak date from curves coincides. Which indicates the AND increases just after the Meteor Herculids height of 50-160 km and remained almost same for a day. • The sun sinks below the horizon, the Shower and regains the original value. • Some aerosols came down by height of 6km in 24 • CBE ‘s data of 2009 is limited up to 80 km altitude due to lack of data. In hr.(108km to 102km) and also increased by almost 55 h= R sec( ) − 1 effective height of the Earth’s shadow 3 3 푝푎푟푡푖푐푙푒/푑푚 on 15/02/11. rises and scattering takes place to higher 2009 at 78 km altitude AND increases from 350 to 500 particles per dm (ppd) • Above 60km aerosols came to normal as they were before levels. and at same altitude for 2010 AND increases from 380 to 480 ppd. • Alpha Crucids and Delta Cancrids occur just one after another. At altitude of peak. Some aerosol settled on 91 km and 81 km (observed 1 dI d In I • Light received at the ground will be the by peaks). − = − primary scattered light by the particles of 80 km due to Alpha Crucids 2009 AND increased from 250 to 325 ppd and I dh dh due to Delta Cancrids 2009 AND increased from 275 to 350 ppd. Here we see • Overall increased in AND observed in the range of 50- interest 3 collective effect of both the Meteor Showers. 100 푝푎푟푡푖푐푙푒/푑푚 . • Variations in the vertical profiles 1 dI dIn (aerosol number density) • The intersection of blue and red curve in PUP indicates aerosols were just − = − of the molecular density were Gamma • Increased in AND observed by 3 times. I dH dh introduced in atmosphere at higher altitude. Below the crossing red curve very small and their effect on the shows normal AND while blue curve shows AND travelled down as the time Normids • 70-150 km on M 12/03/11 and 60-150 km on observed is constant. passes. M 13/03/11 and 50-150 km on M 16/03/11. • COM shows the distribution of AND before and after the event. Where we • Overall increased in AND observed in the range of 50- Aerosol Number Density/ cm3 = Antilog10 {10[1/I (dI/dh)]-1} get to see red curve is distinctly shifted to right. 150 푝푎푟푡푖푐푙푒/푑푚3. Instrument Conclusions Block Diagram Semiautomatic Twilight ➢Aerosol particles are evenly distributed along the altitude of range 50 km to ➢Most of these suspended particles starts moving downwards which Of Instrument Photometer 150 km (Mesosphere and Thermosphere). causes increase in AND at lower altitudes.
Load more
Loading...

—— Preview end. ——

Recommended publications
  • „Ordinary“ Showers
    „Ordinary“ Showers # MDC Show Shower Name MDC Number Solar Longitude Right Declination Vgeo Comment Num Code Status of Ascension ber Meteors Mean/ Max Interval Mean Drift Mean Drift Mean Drift [°] [°] [°] [°] [°] [°] [km/s] [km/s] 1 40 ZCY zeta Cygnids W 500 16 13-20 302 +0.3 +40 +0.2 40 - NM; SS: α,δ,v geo ; DM: δ 2 131 DAL delta Aquilids W 200 20 17-23 308 +1.0 +12 +0.3 63 - DM: δ 3 136 SLE sigma Leonids W 1,000 26 18-35 201 +0.6 +3 +0.0 19 -0.16 NM; DM: α,v geo 348 ARC April rho Cygnids E 4 1,700 33 13-44 314 +0.8 +44.5 +0.3 42 +0.00 ARC and NCY are identical 409 NCY nu Cygnids W 5 346 XHE x Herculids W 300 352 350-355 256 +0.8 +48.5 -0.0 35 - NM 6 6 LYR April Lyrids E 4,000 32.5 28-35 272.6 +0.65 +33.2 -0.3 45.5 +0.25 7 343 HVI H Virginids W 200 41 39-43 205 +0.7 -11 -0.5 17 - NM; SD; NAD 8 31 ETA eta Aquariids E 3,800 47 38-59 339.1 +0.64 -0.5 +0.33 66.5 +0.1 9 531 GAQ gamma Aquilids W 320 48 45-52 307 -0.1 +14.5 -0.1 66 - NM; SS: α; Part of N Apex? 10 145 ELY eta Lyrids E 800 50 45-52 291.3 +0.15 +43.4 +0.0 42.6 - Maybe active longer; DM: δ 11 520 MBC May beta Capricornids W 150 59 56-61 305 +0.7 -15 +0.3 68 - NM; WS; similar to 7CCA 12 362 JMC June mu Cassiopeiids W 150 71 69-74 11 +2.8 +53 +0.5 42 - WS; SS: α,δ,v geo 13 171 ARI Daytime Arietids E 70 77 74-79 44 +1.0 +23.5 +0.1 42 NM; Daytime shower; DM: v geo 14 164 NZC Northern June Aquilids E 200 82 79-84 293 +1.0 -12 -0.4 42 - DM: v geo 510 JRC NM; SD; NAD; short & strong; 15 June rho Cygnids W 190 84 83-85 320.4 +0.8 44.7 -0.8 48 - 521 JRP JRP is identical to JRC 16 410 DPI
    [Show full text]
  • Meteor Activity Outlook for January 2-8, 2021
    Meteor Activity Outlook for January 2-8, 2021 Daniel Bush captured this impressive fireball at 04:11 UT (23:11 CDT on Sept. 5) on 6 Septmeber 2020, from Albany, Missouri, USA. For more details on this particular event visit: https://fireball.amsmeteors.org/members/imo_view/event/2020/5020. Credit Daniel Bush January is best known for the Quadrantids, which have the potential of being the best shower of the year. Unfortunately, this shower is short lived and occurs during some of the worst weather in the northern hemisphere. Due to the high northern declination (celestial latitude) and short summer nights, little of this activity can be seen south of the equator. There are many very minor showers active throughout the month. Unfortunately, most of these produce less than 1 shower member per hour and do not add much to the overall activity total. Activity gets interesting as seen from the southern hemisphere as ill-defined radiants in Vela, Carina, and Crux become active this month. This activity occurs during the entire first quarter of the year and moves eastward into Centaurus in February and ends in March with activity in Norma and Lupus. Sporadic rates are generally similar in both hemispheres this month. Sporadic rates are falling though for observers in the northern hemisphere and rising as seen from the southern hemisphere. During this period, the moon reaches its last quarter phase on Wednesday January 6th. At this time, the moon is located 90 degrees west of the sun in the sky and will rise near midnight standard time.
    [Show full text]
  • Investigating the Radiant Sources of Meteors Anamol Mittal, Dr
    International Journal of Scientific & Engineering Research Volume 8, Issue 10, October-2017 1369 ISSN 2229-5518 Investigating the radiant sources of meteors Anamol Mittal, Dr. K. Kishore Kumar Abstract— The results obtained in the present study, which are related to basic meteor phenomenon such as meteor velocity distribution, height distribution and annual variability of meteors are discussed. An attempt is also made to identify the peak radiant sources of the observed meteors. The results are found to be consistent with the present understanding of the meteor phenomenon. Further studies are required to estimate the orbits of the meteors using single station observations. The important outcome of the present study is the algorithm for estimating the radiant sources using azimuth, zenith angle observations of meteor radar. Index Terms— Astronomy, earth sciences, entrance velocity distribution, meteor wind radar, meteors, radiant sources, Thumba —————————— —————————— 1 INTRODUCTION eople have always wondered about the worlds that lie 3. Epoch: In astronomy, an epoch is a moment in time P beyond the boundaries of sky, the purpose of our exis- used as a reference point for some time-varying as- tence, whether the existence of earth is a result of some tronomical quantity, such as the celestial coordinates higher purpose or just a lucky coincidence? Well, answers to or elliptical orbital elements of a celestial body, be- these questions are not known and beyond the reach of present technology. One such question asks: Where do the cause these are subject to perturbations and vary with meteoroids (most commonly known as falling stars) come time.[2] from and how is their distribution in solar system related to the formation of planets and other solar system bodies? You may find answers to these questions as you proceed through the report.
    [Show full text]
  • Craters and Airbursts
    Craters and Airbursts • Most asteroids and comets fragments explode in the air as fireballs or airbursts; only the largest ones make craters. • Evidence indicates that the YDB impact into the Canadian ice sheet made ice-walled craters that melted away long ago. • The YDB impact also possibly created rocky craters, most likely along the edge of the ice sheet in Canada or underwater in the oceans. • Our group is planning expeditions to search for impact evidence and hidden craters, for example to North Dakota, Montana, Quebec, and Nova Scotia. The following pages show what could happen during an impact NOTE: this website is a brief, non-technical introduction to the YDB impact hypothesis. For in-depth information, go to “Publications” to find links to detailed scientific papers. NAME OF SHOWER NAME OF SHOWER Alpha Aurigids Leo Minorids Meteor Showers Alpha Bootids Leonids Alpha Capricornids Librids Alpha Carinids Lyrids Comet impacts are common, Alpha Centaurids Monocerotids Alpha Crucids Mu Virginids but usually, they are harmless Alpha Cygnids Northern Delta Aquariids Alpha Hydrids Northern Iota Aquariids Alpha Monocerotids Northern Taurids Alpha Scorpiids October Arietids • Earth is hit by 109 meteor Aries-triangulids Omega Capricornids Arietids Omega Scorpiids showers every year (listed at Beta Corona Austrinids Omicron Centaurids right), averaging 2 collisions Chi Orionids Orionids Coma Berenicids Perseids with streams each week Delta Aurigids Phoenicids Delta Cancrids Pi Eridanids Delta Eridanids Pi Puppids • Oddly, most “meteor showers”
    [Show full text]
  • Meteor Showers
    Gary W. Kronk Meteor Showers An Annotated Catalog Second Edition The Patrick Moore The Patrick Moore Practical Astronomy Series For further volumes: http://www.springer.com/series/3192 Meteor Showers An Annotated Catalog Gary W. Kronk Second Edition Gary W. Kronk Hillsboro , MO , USA ISSN 1431-9756 ISBN 978-1-4614-7896-6 ISBN 978-1-4614-7897-3 (eBook) DOI 10.1007/978-1-4614-7897-3 Springer New York Heidelberg Dordrecht London Library of Congress Control Number: 2013948919 © Springer Science+Business Media New York 1988, 2014 This work is subject to copyright. All rights are reserved by the Publisher, whether the whole or part of the material is concerned, speci fi cally the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on micro fi lms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. Exempted from this legal reservation are brief excerpts in connection with reviews or scholarly analysis or material supplied speci fi cally for the purpose of being entered and executed on a computer system, for exclusive use by the purchaser of the work. Duplication of this publication or parts thereof is permitted only under the provisions of the Copyright Law of the Publisher’s location, in its current version, and permission for use must always be obtained from Springer. Permissions for use may be obtained through RightsLink at the Copyright Clearance Center. Violations are liable to prosecution under the respective Copyright Law. The use of general descriptive names, registered names, trademarks, service marks, etc.
    [Show full text]
  • Joe Orman's Naked-Eye
    Joe Orman’s Naked‐Eye 100 Title Description All‐Night Sky Stay up all night and watch the sky change as the earth turns. This faint patch of light is the farthest thing visible to the naked eye, over Andromeda Galaxy 2 million light‐years away! This red giant star in Scorpius is sometimes close to Mars, and they look Antares, The Rival Of Mars the same‐ bright and pink. Crepuscular rays converging on the antisolar point; often very faint and Anticrepuscular Rays diffuse. Follow the curve of the Big Dipper's handle to a bright star‐ Arcturus in Arc To Arcturus Bootes. ISS, HST etc. look like stars moving steadily across the sky. Check Artificial Satellites heavens‐above.com for visibility. Usually too faint to see, but on April13, 2029, asteroid 2004MN will Asteroids make a close naked‐eye pass. Bright glow around the sun or moon, colorless and only a few degrees Aureole across. Northern Lights. From the southern U.S., can occasionally be seen as a Aurora Borealis reddish glow in the northern sky. Sunlight peeking between the mountains of the moon during a total Bailey's Beads solar eclipse. A band of pink above the horizon; look opposite the sun just before Belt Of Venus sunrise or just after sunset Betelgeuse The Hunter's left shoulder is a red giant star, bright and pink to the eye. The body and tail of Ursa Major, the Big Bear. Close to Polaris in the Big Dipper northern sky. The star where the dipper's handle bends, Mizar, has a fainter Big Dipper Double‐Star companion Alcor‐ a good test of vision.
    [Show full text]
  • Appendix A: the Maribo Meteorite
    Appendix A: The Maribo Meteorite Although the Maribo meteorite may ultimately have come from Comet Encke, or the hypothetical comet from which Encke and the Taurid meteor complex is widely thought to have originated, the more recent history of this object appears to associate it with several other minor Solar System bodies. As mentioned in the main text, there appears to be a strong association (as determined by Drummond’s D′ criterion) with the Apollo asteroid 85182. But the associations do not cease there. In their paper published in The Observatory (1994 October), Duncan I. Steel and David Asher distinguished two groups of Apollo asteroids; the larger of the two pursuing orbits similar to those of the Taurid meteors and the smaller having orbital ele- ments similar to those of the asteroid (2212) Hephaistos. These apparent families were simply called the Taurid group and the Hephaistos group respectively. As noted in Chap. 1 of the pres- ent book, each group also includes a comet; Encke in association with the former and Helfenzrieder in association with the latter. Encke remains an active object, but Helfenzrieder was observed (as a relatively bright naked-eye object sporting a long tail) only during its 1766 apparition. This object was probably dormant at earlier returns and possibly broke apart in 1766, going out in an uncharacteristic blaze of glory. Any remnant that may continue to exist today is presumably small and very faint although some day it may be discovered anew by one of the search programs seeking near-Earth objects. Steel and Asher found that the two asteroid groups distin- guished themselves most readily through the respective ranges of longitude of perihelion of their members’ orbits.
    [Show full text]
  • Yearly Meteor Showers
    Yearly Meteor Showers Name Dates Peak dates Rating Quadrantids 1 January – 5 January 3 January Strong Gamma Velids 1 January – 15 January 5 January Weak Alpha Crucids 6 January – 28 January 15 January Weak Delta Cancrids 1 January – 31 January 17 January Medium Alpha Hydrids 5 January – 14 February 19 January Weak Eta Carinids 14 January – 27 January 21 January Weak Alpha Carinids 24 January – 9 February 30 January Weak Delta Velids 22 January – 21 February 5 February Weak Alpha Centaurids 28 January – 21 February 7 February Medium Omicron Centaurids 31 January – 19 February 11 February Weak Theta Centaurids 23 January – 12 March 21 February Weak February Leonids 1 February – 28 February several Medium Delta Leonids 15 February – 10 March 24 February Medium Gamma Normids 25 February – 22 March 13 March Medium Virginids 1 March – 15 April several Medium Delta Pavonids 11 March – 16 April 30 March Weak Librids 15 April – 30 April several Medium Lyrids 15 April – 28 April 22 April Strong Pi Puppids 15 April – 28 April 23 April Irregular Alpha Bootids 14 April – 12 May 28 April Weak Mu Virginids 1 April – 12 May 29 April Weak Omega Capricornids 19 April – 15 May 2 May Weak Eta Aquariids 19 April – 28 May 6 May Strong Alpha Scorpiids 1 May – 31 May 16 May Medium Beta Corona Austrinids 23 April – 30 May 16 May Weak Omega Scorpiids 23 May – 15 June 2 June Weak Arietids 22 May – 2 July 7 June Strong Sagittarids 1 June – 15 July 19 June Medium June Lyrids [2] 10 June – 21 June 15 June Irregular Tau Cetids 18 June – 4 July 27 June Weak June Bootids
    [Show full text]
  • Meteor Showers
    Meteor Showers Meteor Showers Dates Peak Dates RA/DEC Speed (km/s) ZHR Rating Quadrantids 1 January – 5 January 3 January 15hr +49 41 120 Strong Gamma Velids 1 January – 15 January 5 January 08hr -47 35 2 Weak Alpha Crucids 6 January – 28 January 15 January 12hr -63 50 3 Weak Delta Cancrids 1 January – 31 January 17 January 08hr +20 28 4 Medium Alpha Hydrids 5 January – 14 February 19 January 08hr -11 44 2 Weak Eta Carinids 14 January – 27 January 21 January 10hr -59 n/a 2 Weak Alpha Carinids 24 January – 9 February 30 January 06hr -54 25 2 Weak Delta Velids 22 January – 21 February 5 February 08hr -52 35 1 Weak Alpha Centaurids 28 January – 21 February 7 February 14hr -59 56 6 Medium Omicron Centaurids 31 January – 19 February 11 February 11hr -56 51 2 Weak Theta Centaurids 23 January – 12 March 21 February 14hr -41 60 4 Weak February Leonids 1 February – 28 February Several 11hr +06 30 5 Medium Delta Leonids 15 February – 10 March 24 February 11hr +16 23 2 Medium Gamma Normids 25 February – 22 March 13 March 16hr -51 56 8 Medium Virginids 1 March – 15 April Several 13hr -04 30 5 Medium Delta Pavonids 11 March – 16 April 30 March 20hr -65 58 5 Weak Librids 15 April – 30 April Several 15hr -18 30 5 Medium Lyrids 15 April – 28 April 22 April 18hr +34 49 15 Strong Pi Puppids 15 April – 28 April 23 April 07hr -45 18 variable Irregular Alpha Bootids 14 April – 12 May 28 April 14hr +19 20 2 Weak Mu Virginids 1 April – 12 May 29 April 15hr -07 30 2 Weak Omega Capricornids 19 April – 15 May 2 May 21hr -22 50 2 Weak Eta Aquariids 19 April – 28
    [Show full text]
  • The NASA Fireball Network Database
    The NASA Fireball Network Database Danielle E. Moser, Dynetics/Meteoroid Environment Office The NASA Meteoroid Environment Office (MEO) has been operating an automated video fireball network since late-2008. Since that time, over 1,700 multi-station fireballs have been observed. A database containing orbital data and trajectory information on all these events has recently been compiled and is currently being mined for information. Preliminary results are presented here. The NASA Fireball Network Database Danielle Moser Dynetics/MEO NASA Workshop on Meteor Video Observations & Analysis, Aug 4-5, 2011 Objectives of the NASA Fireball Network 1. Determine the speed distribution of cm-sized meteoroids 2. Determine the major sources of cm-sized meteoroids (showers/sporadic sources) 3. Characterize meteor showers (numbers, magnitudes, trajectories, orbits) 4. Determine the size at which showers dominate the meteor flux 5. Discriminate between re-entering space debris and meteors 6. Locate meteorite falls NASA Workshop on Meteor Video Observations & Analysis, Aug 4-5, 2011 Objectives of the NASA Fireball Network 1. Determine the speed distribution of cm-sized meteoroids 2. Determine the major sources of cm-sized meteoroids (showers/sporadic sources) 3. Characterize meteor showers (numbers, magnitudes, trajectories, orbits) 4. Determine the size at which showers dominate the meteor flux 5. Discriminate between re-entering space debris and meteors 6. Locate meteorite falls NASA Workshop on Meteor Video Observations & Analysis, Aug 4-5, 2011 Data
    [Show full text]
  • Analysis of the Main and Small Meteor Showers M
    ANALYSIS OF THE MAIN AND SMALL METEOR SHOWERS M. V. Sergienko, M. G. Sokolova, A. O. Andreev, Y. A. Nefedyev Kazan Federal University, Kazan, Russia Results Using the method developed in [1], for the main streams of Perseids, Lyrids, Geminids and α- Capricornids and small streams of the unknown origin k-Cygnids and δ-Cancrids having northern NCC and southern SCC branches a radiant structure analysis was conducted on the basis of TV catalogues of meteor orbits brighter than +3m (Japan Meteor Network SonotaCo, 2007–2015, http://sonotaco.jp/doc/SNM/index.htm; Croatian Meteor Network CMN, 2007–2012, http://cmn.rgn.hr/ downloads/downloads.html#orbitcat). As a result, the showers’ radiation areas, their distribution depending on stellar magnitude, allocation for observational dates, correlation between the shapes of meteoroids orbits and their masses were analyzed. The smallest scatter of radiant coordinates (α, δ) is observed for the Lyrids stream (ellipse of 40×80), the greatest one which is about 280 both by right ascension and declination is observed for k-Cygnids. The change of δ for other streams varies between 70 and 100. The values of Lyrid, Perseid, k-Cygnid, and α-Capricornid radiants declination are growing Introduction in step with the increasing right ascension α, while for Geminids and δ-Cancrids a pattern of δ The Earth as well as other planets and their satellites regularly change does not correlate with change of α. collides with space bodies. Larger meteoroids of 10 to 100 The radiation area of the showers investigated is evenly filled with radiants without marking out meters in size due to their low brightness, high extra-terrestrial single subradiants.
    [Show full text]
  • Astronomers' Observing Guides
    Astronomers’ Observing Guides For other titles published in this series, go to www.springer.com/series/5338 Robert Lunsford Meteors and How to Observe Them with 151 Illustrations Robert Lunsford American Meteor Society Chula Vista, CA, USA lunro.imo.usa@cox.net Series Editor Dr. Mike Inglis, BSc, MSc, Ph.D. Fellow of the Royal Astronomical Society Suffolk County Community College New York, USA inglism@sunysuffolk.edu ISBN 978-0-387-09460-1 e-ISBN 978-0-387-09461-8 DOI: 10.1007/978-0-387-09461-8 Library of Congress Control Number: 2008941004 © Springer Science+Business Media, LLC 2009 All rights reserved. This work may not be translated or copied in whole or in part without the written permission of the publisher (Springer Science+Business Media, LLC, 233 Spring Street, New York, NY 10013, USA), except for brief excerpts in connection with reviews or scholarly analysis. Use in connection with any form of information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed is forbidden. The use in this publication of trade names, trademarks, service marks and similar terms, even if they are not identifi ed as such, is not to be taken as an expression of opinion as to whether or not they are subject to proprietary rights. Printed on acid-free paper springer.com I would like to dedicate this book to my wife Denise, who has endured far too many nights alone while her spouse was out under the stars with the likes of Cassiopeia and Andromeda Preface Preface In this era of high-tech instruments, meteor observing is the one facet of astron- omy that needs nothing more than your naked eye.
    [Show full text]