C/2015 V2 (Johnson)
Discovery | |
---|---|
Discovered by | J. A. Johnson Catalina Sky Survey (703)[1] |
Discovery date | 3 November 2015[1] |
Orbital characteristics | |
Epoch | 10 February 2016 |
Number of observations | 279[1][2][3][4][5] |
Perihelion | 1.63714AU[2] |
Eccentricity | 1.00145[3] |
Orbital period | 14.4 Myr (incoming) |
Inclination | 49.87499°[3] |
Next perihelion | 12 June 2017[3] |
C/2015 V2 (Johnson) is a
The comet was characterised by its very low activity, resembling a manx comet. The comet showed no emission from C2, C3 and CN, which are part of the typical spectrum of comet, when it was 2,83 AU from the Sun, but they were detected when the comet reached 2,3 AU from the Sun.[10] The comet was observed by the SWAN instrument onboard SOHO and determined its water production near perihelion was 1029/s. Infrared spectroscopic observations indicated that the rotational temperature of the comet was warmer than predicted, indicating the presence of an icy grainy halo.[11] The absolute nuclear magnitude was estimated to be 16.127 ± 0.176, indicating that the effective radius of the comet was 1,7 ± 0,138 km.[12] The comet exhibited fan-shaped fine jets in the direction opposite of the Sun when imaged using polarimetry.[13]
References
- ^ IAU Minor Planet Center. 2015-11-05. Retrieved 2015-11-05. (CK15V020)
- ^ a b c d "MPEC 2015-V62 : COMET C/2015 V2 (JOHNSON)". IAU Minor Planet Center. 2015-11-06. Retrieved 2015-11-25. (CK15V020)
- ^ a b c d e f "MPEC 2015-W63 : OBSERVATIONS AND ORBITS OF COMETS". IAU Minor Planet Center. 2015-11-23. Retrieved 2015-11-25. (CK15V020)
- ^ a b c "MPEC 2015-W09 : COMET C/2015 V2 (JOHNSON)". IAU Minor Planet Center. 2015-11-17. Retrieved 2015-11-25. (CK15V020)
- ^ "MPC: Orbits/Observations Database: C/2015 V2 (Johnson)" (last observation: 2015-11-22; arc: 19 days). The Minor Planet Center. Retrieved 2015-10-25.
- ^ a b "JPL Small-Body Database Browser: C/2015 V2 (Johnson)" (last observation: 2015-11-22; arc: 19 days). Jet Propulsion Laboratory. Retrieved 2015-10-25.
- ^ "Komet Johnson zieht über den Mai-Himmel".
- ^ "Weekly Information about Bright Comets (2017 July 1: North)". www.aerith.net. Retrieved 16 October 2022.
- ^ "Weekly Information about Bright Comets (2017 Aug. 12: North)". www.aerith.net. Retrieved 16 October 2022.
- Bibcode:2018EPSC...12.1220V.
- S2CID 234679279.
- .
- S2CID 252600934.