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C/2012 S1

File:Comet_ISON_(C-2012_S1)_by_TRAPPIST_on_2013-11-15.jpg · Wikimedia Commons · See Wikimedia Commons

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Also known as Comet ISON

comet discovered in 2012, with a close approach to Earth in December 2013

Key facts

Discovered by
Vitaly Nevsky , Artyom Novichonok
Discovery site
ISON –Kislovodsk ( D00 )
Discovery date
21 September 2012
Epoch
14 December 2013 ( JD 2456640.5)
Observation arc
2.15 years
Number of observations
6,682
Orbit type
Oort cloud
Perihelion
0.01244 AU (2.68 R ☉ )
Eccentricity
1.000000086 (epoch 1950) , 0.9999947 (near perihelion) , 1.0002 (epoch 2050)
Orbital period
Ejection trajectory (epoch 2050)
Max orbital speed
337.3 km/s (755,000 mph; 1.214 million km/h; 209.6 mi/s)
Inclination
62.4°
Last perihelion
28 November 2013
Dimensions
0.6–1.4 km (0.37–0.87 mi)
Apparent magnitude
–2.0, (2013 apparition)

via Wikipedia infobox

~19 min read

Encyclopedic overview

Comet ISON, formally known as C/2012 S1, was a sungrazing comet from the Oort cloud which was discovered on 21 September 2012 by Vitaly Nevsky (Віталь Неўскі, Vitebsk, Belarus) and Artyom Novichonok (Артём Новичонок, Kondopoga, Russia).

History

Excerpted from Wikipedia’s “C/2012 S1” article, available under the CC BY-SA 4.0 licence.

Gallery (6)