C/2023 RN3 (ATLAS)

For other comets discovered by the Asteroid Terrestrial-impact Last Alert System, see Comet ATLAS.
C/2023 RN3 (ATLAS)
Discovery[1]
Discovery siteATLAS–HKO (T05)
Discovery date4 September 2023
Orbital characteristics[2]
Epoch2 November 2023 (JD 2460250.5)
Observation arc734 days (2.01 years)
Earliest precovery date26 August 2023
Number of
observations		637
Aphelion15.128 AU
Perihelion5.172 AU
Semi-major axis10.149 AU
Eccentricity0.49041
Orbital period32.337 years
Inclination10.358°
207.07°
Argument of
periapsis		130.30°
Mean anomaly8.778°
Last perihelion18 January 2023
Next perihelion2055
TJupiter2.907
Earth MOID4.175 AU
Jupiter MOID0.627 AU
Physical characteristics[4]
  • (g′−r') = 0.61±0.03
  • (r′−i′) = 0.30±0.03
  • (i′−z′) = 0.04±0.08
Comet total
magnitude (M1)		6.5[2]
17.8
(2023 apparition)[3]

C/2023 RN3 (ATLAS) is a Jupiter-family comet with a centaur-like orbit around the Sun lasting once every 32 years. It is one of many comets discovered by the Asteroid Terrestrial-impact Last Alert System (ATLAS).

References

  1. ^ H. H. Hsieh; K. Ly; P. Van Wylen; et al. (6 December 2023). D. W. Green (ed.). "Comet C/2023 RN3 (ATLAS)". Central Bureau for Astronomical Telegrams. 5321. Bibcode:2023CBET.5321....1H.
  2. ^ a b "C/2023 RN3 (ATLAS) – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 3 December 2025.
  3. ^ "Observation list for C/2023 RN3". COBS – Comet OBServation database. Retrieved 3 December 2025.
  4. ^ H. H. Hsieh; M. S. P. Kelley; T. A. Lister; et al. (2023). "Activity in Centaur-like Jupiter-family Comet 2023 RN3". Research Notes of the American Astronomical Society. 7 (12): 263. Bibcode:2023RNAAS...7..263H. doi:10.3847/2515-5172/ad12ce.
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