C/2013 N4 (Borisov)

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C/2013 N4 (Borisov)
Discovery [1]
Discovered by Gennadiy Borisov
Discovery site Crimea, Ukraine
Discovery date8 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 perihelion21 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]

Contents

Observational history

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

  1. 1 2 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.
  2. ↑ "C/2013 N4 (Borisov) – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory . Retrieved 1 August 2025.
  3. 1 2 B. King (15 July 2013). "Amateur astronomer discovers comet C/2013 N4 (Borisov) during a star party". Phys.org. Retrieved 1 August 2025.
  4. ↑ 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.
  5. ↑ 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 .
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