Jump to content

333P/LINEAR

From Wikipedia, the free encyclopedia

333P/LINEAR
Comet 333P/LINEAR photographed by NEOWISE on 21 February 2016
Discovery[1]
Discovery siteLINEAR
Discovery date4 November 2007
Designations
P/2007 VA85
LINEAR 66[2]
Orbital characteristics[3][4]
Epoch21 November 2025 (JD 2461000.5)
Observation arc17.87 years
Number of
observations		1,340
Aphelion7.329 AU
Perihelion1.113 AU
Semi-major axis4.222 AU
Eccentricity0.73629
Orbital period8.674 years
Inclination132.02°
115.71°
Argument of
periapsis		26.033°
Mean anomaly40.531°
Last perihelion29 November 2024
Next perihelion1 August 2033[5]
TJupiter0.418
Earth MOID0.176 AU
Jupiter MOID0.364 AU
Physical characteristics[6]
Mean radius
3.04 km (1.89 mi)
21.04 hours[7]
(V–R) = 0.44±0.01
Comet total
magnitude (M1)		15.0
10.7
(2024 apparition)

333P/LINEAR is a Jupiter-family comet in an 8.7-year retrograde orbit around the Sun. Upon discovery, it was the object with the shortest known retrograde orbit. The comet was discovered by LINEAR on 4 November 2007.[1]

Observational history

[edit]
The comet on 30 November 2024, featuring a green coma and a short tail.

When discovered on 4 November 2007, the comet had an apparent magnitude of 18.5–19 and was asteroidal in appearance. It was given the provisional designation 2007 VA85.[1] During the next apparition, it was recovered by the iTelescope Observatory, in Siding Spring, Australia, on 18 November 2015, when it had an apparent magnitude of around 20, and on 1 January 2016 by the SONEAR observatory.[8] A small tail was observed and thus it was recategorised as a comet.[9] It brightened rapidly and reached a magnitude of 12.6 on 28 March 2016.[10] During the 2024 apparition, the comet approached Earth at a distance of 0.55 AU (82 million km) and brightened up to a magnitude of 10.7 in early December.[11] The Sampurnanand Telescope in Nainital, India observed the comet three times between December 2024 and March 2025, obtaining photopolarimetric measurements alongside C/2023 H5 (Lemmon).[12]

The comet received its official numerical designation (333P) alongside 91 other periodic comets on January 2017.[13]

Orbit

[edit]

When discovered, the comet was the first object with retrograde orbit within Jupiter's orbit. It was categorised as an Amor asteroid and was briefly considered potentially hazardous to Earth.[14] Simulations indicated it was a comet nucleus that was possibly put into its current orbit after an interaction with Jupiter and in the future it will collide with the Sun or migrate beyond the orbit of Jupiter.[15] The cometary activity has been found to play a role in the orbital evolution of the comet.[16]

Physical characteristics

[edit]

Infrared observations from both NEOWISE and the Spitzer Space Telescope indicate a nucleus radii of around 3.04 km (1.89 mi), a fairly large comet relative to other Jupiter-family comets.[6] Photometric studies conducted at the Table Mountain Observatory in 2016 revealed that the comet may have a best-fit rotation period of around 21.04 hours, although it may be possible that it could be half that value (10.5 hours) if the short term variability is caused by a single active area coming into and out of direct sunlight.[7]

See also

[edit]

References

[edit]
  1. 1 2 3 D. W. Green (10 November 2007). "2007 VA85". IAU Circular. 8894 (2). Bibcode:2007IAUC.8894....2G.
  2. ↑ "Periodic Comet Names and Designations". Planetary Data System: Small Body Node. NASA. Retrieved 4 July 2026.
  3. ↑ "333P/LINEAR – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 17 October 2025.
  4. ↑ "333P/LINEAR Orbit". Minor Planet Center. Retrieved 17 October 2025.
  5. ↑ "Horizons Batch for 333P/LINEAR (90001313) on 2033-Aug-01" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 16 October 2025. (JPL#64, Soln.date: 2025-Sep-22)
  6. 1 2 M. M. Knight; R. Kokotanekova; N. H. Samarasinha (2024). "Physical and Surface Properties of Comet Nuclei from Remote Observations". In K. J. Meech (ed.). Comets III. University of Arizona Press. pp. 361–404. arXiv:2304.09309. JSTOR jj.21819446.18.
  7. 1 2 M. Hicks; B. Thackeray (2016). "Spin Rate of Comet 333P/LINEAR (2007 VA85)". The Astronomer's Telegram. 8905: 1. Bibcode:2016ATel.8905....1H.
  8. ↑ T. Linder; R. Holmes; T. Lister; et al. (10 January 2016). "Comet P/2007 VA85 (LINEAR)". Minor Planet Electronic Circulars. 2016-A101. Bibcode:2016MPEC....A..101L. ISSN 1523-6714.
  9. ↑ P. Kankiewicz; I. Włodarczyk (2021). "Impact of non-gravitational effects on chaotic properties of retrograde orbits" (PDF). Astronomy & Astrophysics. 646: A182. arXiv:2101.04364. Bibcode:2021A&A...646A.182K. doi:10.1051/0004-6361/202037738.
  10. ↑ Yoshida, Seiichi. "Weekly Information about Bright Comets (2016 Apr. 2: North)". www.aerith.net. Retrieved 29 July 2023.
  11. ↑ Yoshida, Seiichi. "Weekly Information about Bright Comets (2024 Dec. 21: North)". www.aerith.net. Retrieved 24 December 2024.
  12. ↑ N. N. Devi; H. S. Das; G. B. Choudbury; et al. (2026). "Photopolarimetric studies of comets C/2023 H5 and 333P/LINEAR" (PDF). Monthly Notices of the Royal Astronomical Society. 547 (3): 408–421. Bibcode:2026MNRAS.547ag408D. doi:10.1093/mnras/stag408.
  13. ↑ D. W. Green (January 2017). "Numbering of Short-Period Comets" (TXT). Central Bureau for Astronomical Telegrams. 4343: 1. Bibcode:2017CBET.4343....1G.
  14. ↑ P. Kankiewicz; I. Włodarczyk (2010). A. M. Finkelstein; W. F. Huebner; V. A. Shor (eds.). The Orbital Evolution of 2007 VA85, an Amor-type Asteroid on a Retrograde Orbit (PDF). Protecting the Earth Against Collisions with Asteroids and Comet Nuclei. St. Petersburg, Russia. pp. 268–271. Bibcode:2010peca.conf..268K.
  15. ↑ S. Greenstreet; B. Gladman; H. Ngo; M. Granvik; S. M. Larson (2012). "Production of Near-Earth Asteroids on Retrograde Orbits". The Astrophysical Journal. 749 (2): L39. Bibcode:2012ApJ...749L..39G. doi:10.1088/2041-8205/749/2/L39.
  16. ↑ P. Kankiewicz; I. Włodarczyk (2018). "Non-gravitational effects in the motion of comet 333P/LINEAR" (PDF). Proceedings of the Polish Astronomical Society. 7: 132–134. Bibcode:2018pas7.conf..132K.
[edit]
Retrieved from "https://en.wikipedia.org/w/index.php?title=333P/LINEAR&oldid=1369756669"