C/2013 N4 (Borisov)
| Discovery[1] | |
|---|---|
| Discovered by | Gennadiy Borisov |
| Discovery site | Crimea, Ukraine |
| Discovery date | 8 July 2013 |
| Orbital characteristics[2] | |
| Epoch | 15 September 2013 (JD 2456550.5) |
| Observation arc | 296 days |
| Number of observations | 287 |
| Aphelion | 94.864 AU |
| Perihelion | 1.210 AU |
| Semi-major axis | 48.037 AU |
| Eccentricity | 0.97480 |
| Orbital period | 332.95 years |
| Inclination | 37.035° |
| 322.61° | |
| Argument of periapsis | 142.28° |
| Mean anomaly | 0.072° |
| Last perihelion | 21 August 2013 |
| Next perihelion | ~2340s |
| TJupiter | 1.190 |
| Earth MOID | 0.320 AU |
| Jupiter MOID | 1.099 AU |
| Comet total magnitude (M1) | 12.1 |
C/2013 N4 (Borisov) is a long-period comet that was observed between July 2013 and April 2014. It was the first comet ever discovered by Ukrainian astronomer, Gennadiy Borisov.[3]
Observational history
[edit]During a joint Russian–Ukrainian star party held on Crimea on 8 July 2013, Gennadiy Borisov discovered a new comet using his 8 in (20 cm) telescope, which at the time it was a 17th-magnitude object near the star Capella.[3] Follow-up observations conducted by Artyom Novichonok, Alan Hale, and others confirmed the existence of this comet, later announcing Borisov's discovery on 13 July 2013.[1][4]
While it was about 2.59 AU (387 million km) from the Sun in February 2014, the NEOWISE telescope observed the comet in infrared light, where it determined that it emitted carbon dioxide gas at a rate of (3.01±0.17)×1026 molecules/s-1.[5]
References
[edit]- ^ a b G. Borisov; A. Novichonok; et al. (13 July 2013). D. W. Green (ed.). "Comet C/2013 N4 (Borisov)". Central Bureau Electronic Telegrams. 3584 (1). Bibcode:2013CBET.3584....1N.
- ^ "C/2013 N4 (Borisov) – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 1 August 2025.
- ^ a b B. King (15 July 2013). "Amateur astronomer discovers comet C/2013 N4 (Borisov) during a star party". Phys.org. Retrieved 1 August 2025.
- ^ A. Hale; G. V. Williams (13 July 2013). D. W. Green (ed.). "Comet C/2013 N4 (Borisov)". Central Bureau Electronic Telegrams. 3584 (2). Bibcode:2013CBET.3584....2H.
- ^ A. Gicquel; J. M. Bauer; E. A. Kramer; A. K. Mainzer; J. R. Masiero (2023). "CO and CO
2 Productions Rates of Comets Observed by NEOWISE within Year 1 of the Reactivated Mission". The Planetary Science Journal. 4 (1): 1–10. Bibcode:2023PSJ.....4....3G. doi:10.3847/PSJ/aca8ac.
External links
[edit]- C/2013 N4 at the JPL Small-Body Database
- C/2013 N4 at Seiichi Yoshida's website
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