209P/LINEAR
 | |
| Discovery | |
|---|---|
| Discovered by | LINEAR 1.0-m reflector[1] |
| Discovery date | 3 February 2004 (asteroidal) 30 March 2004 (tail) |
| Designations | |
| 2004 CB | |
| Orbital characteristics | |
| Epoch | 2014-May-23 (JD 2456800.5)[2] |
| Aphelion | 4.952 AU (Q) |
| Perihelion | 0.9695 AU (q) |
| Semi-major axis | 2.961 AU (a) |
| Eccentricity | 0.67258 |
| Orbital period | 5.09 yr |
| Inclination | 21.243° |
| Last perihelion | 2014-May-06[3] 2009-Apr-15[3] |
| Next perihelion | 2019-Jun-12[2] |
209P/LINEAR is a periodic comet discovered on February 3, 2004 by Lincoln Near-Earth Asteroid Research (LINEAR) using a 1.0-metre (39 in) reflector.[1] Initially it was observed without a coma and named 2004 CB as a minor planet or asteroid, but in March Robert H. McNaught observed a comet tail which confirmed it as a comet.[4] It was given the permanent number 209P on December 12, 2008.[5] Prediscovery images of the comet, dating back to December 2003, were found during 2009.[4]
2014 passage
209P/LINEAR came to perihelion (closest approach to the Sun) on 6 May 2014.[3] On 29 May 2014 the comet will pass 0.0554 AU (8,290,000 km; 5,150,000 mi) from Earth,[6] but is only expected to brighten to about apparent magnitude 11.[7]
Associated meteor shower
Preliminary results by Esko Lyytinen and Peter Jenniskens, later confirmed by other researchers, predicted[8][9][10] 209P/LINEAR might generate the next big meteor shower which would come from the constellation Camelopardalis on the night of 23/24 May 2014. It was possible that there could be 100 to 400 meteors per hour.[8] All the trails from the comet from 1803 through 1924 were expected to intersect Earth's orbit during May 2014.[8] The peak activity was expected to occur around 24 May 2014 7h UT when dust trails produced from past returns of the comet could pass 0.0002 AU (30,000 km; 19,000 mi) from Earth.[10] The 2014 Camelopardalids only generated 2-5 meteors per hour.[11] The Canadian Meteor Orbit Radar (CMOR) detected the shower using radar echos but the particles were too small for visual detection. The Eta Aquariids also occur at this time of year.[12]
External links
References
- ^ a b "IAUC 8314: P/2004 CB; 2004ba, 2004bb". IAU Central Bureau for Astronomical Telegrams. 2004-03-31. Retrieved 2012-10-03.
- ^ a b "209P/LINEAR Orbit". Minor Planet Center. Retrieved 2014-05-09.
- ^ a b c Syuichi Nakano (2011-10-31). "209P/LINEAR (NK 2142)". OAA Computing and Minor Planet Sections. Retrieved 2012-10-03.
- ^ a b Gary W. Kronk. "209P/LINEAR". Cometography. Retrieved 2014-05-03.
- ^ "IAUC 9005: COMET P/2008 X4 = P/2003 K2 (CHRISTENSEN); 208P; V5580 Sgr". IAU Central Bureau for Astronomical Telegrams. 2008-12-12. Retrieved 2012-10-03. (password required)
- ^ "JPL Close-Approach Data: 209P/LINEAR". 2009-08-15 last obs (5.70 year arc). Retrieved 2012-10-03.
{{cite web}}: Check date values in:|date=(help) - ^ Alan Hale. "455. COMET 209P/LINEAR P/2008 X2". Earthrise Institute (Southwest Institute for Space Research). Retrieved 2012-10-03.
- ^ a b c "The next big meteor shower". IMCCE. Retrieved 2012-10-03.
- ^ "209P-ids 2014: prediction of activity". Retrieved 2014-04-13.
- ^ a b Wiegert, Paul A.; Quanzhi Ye (2013). "Will Comet 209P/LINEAR Generate the Next Meteor Storm?". Monthly Notices of the Royal Astronomical Society. arXiv:1311.0235.
{{cite web}}:|access-date=requires|url=(help); Missing or empty|url=(help) - ^ "Camelopardalids meteor shower a bust, but not a surprise". The Washington Post. 10:07 AM, 2014 May 24. Retrieved 24 May 2014.
{{cite news}}: Check date values in:|date=(help) - ^ Meteor Activity Outlook for May 24-30, 2014
External links
- Orbital simulation from JPL (Java) / Horizons Ephemeris
- 209P/LINEAR – Seiichi Yoshida @ aerith.net
- Elements and Ephemeris for 209P/LINEAR – Minor Planet Center
- 209P/LINEAR at the Minor Planet Center's Database
- 209P/LINEAR – Kazuo Kinoshita (Dec. 21, 2008 )
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