C/2014 Q3 (Borisov)

NEOWISE image of the comet on 27 November 2014
Discovery
Discovered by	Gennadiy Borisov 0.3 m f/1.5 astrograph ( L51) [1]
Discovery date	22 August 2014
Orbital characteristics
Epoch	9 December 2014 [2]
Aphelion	55.111 au
Perihelion	1.6474 au (q) [2]
Eccentricity	0.94196 [2]
Orbital period	146 years ( epoch 2050) [3]
Inclination	89.949° [2]
Last perihelion	19 November 2014 [2]
Next perihelion	~2160

C/2014 Q3 (Borisov) is a periodic comet discovered at apparent magnitude 17 on 22 August 2014 by amateur astronomer Gennadiy Borisov using a 0.3-meter (12 in) astrograph. ^[1] It is the third comet discovered by Borisov. The comet is best viewed from the northern hemisphere.

The comet was expected to reach about magnitude ~11 near perihelion (closest approach to the Sun), but brightened to around magnitude 10. ^[4] By 8 November 2014, the comet had a declination of +83 and was circumpolar from the northern hemisphere. ^[5] The comet came to perihelion on 19 November 2014 at a distance of 1.65  au from the Sun. ^[2]

Before entering the planetary region ( epoch 1950), C/2014 Q3 had an orbital period of 148 years. ^[3] After leaving the planetary region (epoch 2050), it has an orbital period of 146 years. ^[3]

See also

• List of Halley-type comets
• 2I/Borisov

References