C/2023 P1 (Nishimura)

C/2023 P1 (Nishimura)
Comet C/2023 P1 imaged from Spain on 25 August 2023
Discovery[1]
Discovered byHideo Nishimura
(Kakegawa, Japan)
Discovery date12 August 2023
Designations
C/2023 P1
HN00003
Orbital characteristics[4]
Observation arc232 days (7.7 months)
Earliest precovery date19 January 2023
Number of
observations
477
Aphelion114 AU (1800)[2]
110 AU (2200)
Perihelion0.225 AU (33.7 million km; 87.6 LD)[3]
(73% of Mercury's perihelion)
Semi-major axis57 AU
(comparable to Eris)[4]
Eccentricity0.9961 (1800)[2]
0.9959 (2200)
Orbital period≈431 years (inbound)[2]
≈406 years (outbound)
Max. orbital speed88.7 km/s @ perihelion[3]
Inclination132.5°
66.8°
Argument of
periapsis
116.3°
Last perihelion17 September 2023 15:24[3][4]
≈1588–1592[5][2]
Next perihelion≈2430 Feb[6]
Earth MOID0.078 AU (11.7 million km; 30 LD)[4]
Jupiter MOID2.3 AU (340 million km)
Comet total
magnitude
(M1)
12.7[4]

C/2023 P1 (Nishimura) is a long-period comet discovered by Hideo Nishimura on 12 August 2023.[7] The comet passed perihelion on 17 September 2023 and reached an apparent magnitude of about 2.5.[8]

  1. ^ Cite error: The named reference CBET5285 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference barycenter was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Perihelion was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference jpldata was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference CBET5291 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Perihelion2430 was invoked but never defined (see the help page).
  7. ^ Miller, Katrina (8 September 2023). "Don't Miss Comet Nishimura This Weekend, a Once-in-a-Lifetime View - For the next few mornings, just before sunrise, the cosmic snowball will glow green low on the horizon". The New York Times. Archived from the original on 9 September 2023. Retrieved 9 September 2023.
  8. ^ "Weekly Information about Bright Comets (2023 Dec. 9: North)". www.aerith.net. Retrieved 23 December 2023.