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479P/Elenin

Periodic comet

Field	Value
name	479P/Elenin
image	479P Elenin 2024-04-10 151f.jpg
caption	Comet 479P/Elenin photographed on 10 April 2024
discoverer	Leonid Elenin
0.45-m reflector (H15)
discovery_date	7 July 2011
mpc_name	P/
P/
epoch	15 June 2020
(JD 2459015.5)
semimajor	5.61 AU (a)
perihelion	1.24 AU (q)
aphelion	9.98 AU (Q)
eccentricity	0.779
period	13.28 yr
inclination	15.40°
asc_node	295.81°
arg_peri	263.64°
tjup	2.183
Earth_moid	0.38 AU
last_p	5 May 2024
20 January 2011
next_p	10 September 2037
M1	15.2

0.45-m reflector (H15) P/ (JD 2459015.5) 20 January 2011

479P/Elenin, provisional designation P/, is a Jupiter-family comet with an orbital period estimated at 13.3 years.

Observational history

The comet was discovered on 7 July 2011 when the comet was 2.38 AU from the Sun and 1.4 AU from the Earth and had an apparent magnitude of 19.5. It had come to perihelion (closest approach to the Sun) around 20 January 2011 at 1.2 AU from the Sun. It came to opposition 178.6° from the Sun on 22 July 2011 in the constellation Sagittarius.

On 29 January 2013 the Minor Planet Center awarded Leonid Elenin a 2012 Edgar Wilson Award for the discovery of comets by amateurs.{{cite web |access-date=2013-01-31}}

Maik Meyer proposed that asteroid , which was discovered by PanSTARRS on 18 November 2023, is the return of P/ (Elenin). The link was later confirmed by Shuichi Nakano and Daniel Green. The 2024 apparition was the most favorable in decades, with the comet approaching 0.62 AU to Earth on 4 May 2024, one day before perihelion. The comet appeared gasy and diffuse and brightened to an apparent magnitude of 10 to 11.

The radius of the nucleus is estimated to be less than one kilometre.

References

(19 July 2011). "New Comet: P/2011 NO1". Associazione Fruilana di Astronomia e Meteorologia.
(18 July 2011). "MPEC 2011-O09 : 2011 NO1". [[IAU Minor Planet Center]].
(19 July 2011). "MPEC 2011-O10 : COMET P/2011 NO1". IAU Minor Planet Center.
"JPL Small-Body Database Browser: (2011 NO1)". [[Jet Propulsion Laboratory]].
"CoLiTec". Automatic Detection of Asteroids and Comets CoLiTec (CLT).
"2023 WM26 = P/2011 NO1 (Elenin)".
(21 December 2023). "MPEC 2023-Y72 : 2023 WM26".
(28 January 2024). "COMET P/2023 WM_26 = P/2011 NO_1 (ELENIN)". Central Bureau for Astronomical Telegrams.
"ALPO COMET NEWS FOR MAY 2024".
(December 2015). "Jupiter family comets in near-Earth orbits: Are some of them interlopers from the asteroid belt?". Planetary and Space Science.

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