Open Access Articles- Top Results for LINEAR

International Journal of Innovative Research in Science, Engineering and Technology
Downlink Resource Allocation for Next Generation Wireless Network Using Turbo Codes over Non-Linear Channel
International Journal of Innovative Research in Science, Engineering and Technology
A Non-Linear Controller Based On Discrete Energy Function for An AC/DC SEPIC PFC Converter
International Journal of Innovative Research in Computer and Communication Engineering
Reverberation Suppression of Noisy Speech Signal
International Journal of Innovative Research in Computer and Communication Engineering
Cloud Computing Model for Large Scale System through Merkle Hash Tree
International Journal of Innovative Research in Science, Engineering and Technology
Optimized Image Scaling Processor using VLSI


File:Comet 209P LINEAR in Ursa Major.jpg
Discovered by LINEAR
1.0-m reflector[1]
Discovery date 3 February 2004 (asteroidal)
30 March 2004 (tail)
2004 CB
Orbital characteristics A
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]
Next perihelion 2019-Jun-12[2]

209P/LINEAR is a periodic comet discovered on 3 February 2004 by Lincoln Near-Earth Asteroid Research (LINEAR) using a Script error: No such module "convert". reflector.[1] Initially it was observed without a coma and named 2004 CB as a minor planet or asteroid, but in March 2004 Robert H. McNaught observed a comet tail which confirmed it as a comet.[4] It was given the permanent number 209P on 12 December 2008 as it was the second observed appearance of the comet.[5] Prediscovery images of the comet, dating back to December 2003, were found during 2009.[4] Arecibo imaging in 2014 showed the comet nucleus is peanut shaped and about 2.4 km in diameter.[6][7] The comet has extremely low activity for its size and is probably in the process of evolving into an extinct comet.

2014 passage

209P/LINEAR came to perihelion (closest approach to the Sun) on 6 May 2014.[3] On 29 May 2014 the comet passed Script error: No such module "convert". from Earth,[8] but only brightened to about apparent magnitude 12.[9] The 2014 Earth approach was the 9th closest known comet approach to Earth.[10]

Associated meteor showers

Preliminary results by Esko Lyytinen and Peter Jenniskens, later confirmed by other researchers, predicted[11][12][13] 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.[11] All the trails from the comet from 1803 through 1924 were expected to intersect Earth's orbit during May 2014.[11] 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 Script error: No such module "convert". from Earth.[13] The 2014 Camelopardalids only generated 10–15 visual meteors per hour.[14][15] But the expected radiant and date of visual maximum were correctly predicted.[15] The shower peaked around 6h UT on 24 May 2014.[15] The Canadian Meteor Orbit Radar (CMOR) detected the shower using HF/VHF radar echos but the particles were too small for visual detection. Earth will encounter the 1939 stream around 24 May 2019 8h UT with a ZHR of ~5. The Eta Aquariids also occur at this time of year.[16]

209P/LINEAR may also be the source of the weak 6–14 June meteor shower "sigma Ursae Majorids" (SIM #677).[10]


  1. ^ a b "IAUC 8314: P/2004 CB; 2004ba, 2004bb". IAU Central Bureau for Astronomical Telegrams. 2004-03-31. Retrieved 2012-10-03. 
  2. ^ a b "209P/LINEAR Orbit". Minor Planet Center. Retrieved 2014-05-09. 
  3. ^ a b c Syuichi Nakano (2011-10-31). "209P/LINEAR (NK 2142)". OAA Computing and Minor Planet Sections. Retrieved 2012-10-03. 
  4. ^ a b Gary W. Kronk. "209P/LINEAR". Cometography. Retrieved 2014-05-03. 
  5. ^ "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)
  6. ^ "Arecibo Observatory Sees Comet 209P/LINEAR". Universities Space Research Association (USRA). 2014-05-29. Retrieved 2014-05-29. 
  7. ^
  8. ^ "JPL Close-Approach Data: 209P/LINEAR" (last observation: 2014-05-26; arc: 10.48 years). Retrieved 2012-10-03. 
  9. ^ Alan Hale. "455. COMET 209P/LINEAR P/2008 X2". Earthrise Institute (Southwest Institute for Space Research). Retrieved 2012-10-03. 
  10. ^ a b Peter Jenniskens. "May Camelopardalids". SETI Institute. Retrieved 2014-05-25. 
  11. ^ a b c "The next big meteor shower". IMCCE. Retrieved 2012-10-03. 
  12. ^ "209P-ids 2014: prediction of activity". Retrieved 2014-04-13. 
  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. Bibcode:2014MNRAS.437.3283Y. arXiv:1311.0235. doi:10.1093/mnras/stt2127. 
  14. ^ "Camelopardalids meteor shower a bust, but not a surprise". The Washington Post. 2014-05-24. 10:07AM. Retrieved 2014-05-24. 
  15. ^ a b c "Camelopardalids 2014: First Results". International Meteor Organization. Retrieved 2014-05-25. 
  16. ^ Meteor Activity Outlook for May 24-30, 2014

External links

Periodic comets (by number)
209P/LINEAR Next