&sq=Qlik&lang=&file=File:6min-RGB-C2023_P1_(Nishimura).png){kind=spacer} Comet C/2023 P1 imaged from Spain on 25 August 2023 | |
| Discovery[1] | |
|---|---|
| Discovered by | Hideo Nishimura (Kakegawa, Japan) |
| Discovery date | 12 August 2023 |
| Designations | |
| C/2023 P1 | |
| HN00003 | |
| Orbital characteristics[4] | |
| Observation arc | 232 days (7.7 months) |
| Earliest precovery date | 19 January 2023 |
| Number of observations | 477 |
| Aphelion | 114 AU (1800)[2] 110 AU (2200) |
| Perihelion | 0.225 AU (33.7 million km; 87.6 LD)[3] (73% of Mercury's perihelion) |
| Semi-major axis | 57 AU (comparable to Eris)[4] |
| Eccentricity | 0.9961 (1800)[2] 0.9959 (2200) |
| Orbital period | ≈431 years (inbound)[2] ≈406 years (outbound) |
| Max. orbital speed | 88.7 km/s @ perihelion[3] |
| Inclination | 132.5° |
| 66.8° | |
| Argument of periapsis | 116.3° |
| Last perihelion | 17 September 2023 15:24[3][4] ≈1588–1592[5][2] |
| Next perihelion | ≈2430 Feb[6] |
| Earth MOID | 0.078 AU (11.7 million km; 30 LD)[4] |
| Jupiter MOID | 2.3 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]
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Perihelion2430was invoked but never defined (see the help page). - ^ 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.
- ^ "Weekly Information about Bright Comets (2023 Dec. 9: North)". www.aerith.net. Retrieved 23 December 2023.