C/2023 A3 (Tsuchinshan–ATLAS)
C/2023 A3 (Tsuchinshan–ATLAS) is a comet from the Oort cloud discovered by the Purple Mountain Observatory on 9 January 2023 and independently found by ATLAS South Africa on 22 February 2023. The comet will pass perihelion at a distance of 0.39 AU (58 million km; 36 million mi) on 27 September 2024, when it could become visible to the naked eye.
Images of comet C/2023 A3 (Tsuchinshan–ATLAS) obtained on 2023-02-24 at remote telescopes by amateur astronomer | |
| Discovery | |
|---|---|
| Discovered by | Purple Mountain Observatory ATLAS South Africa |
| Discovery date | 9 January 2023 |
| Designations | |
MPC designation | C/2023 A3 |
Alternative designations | A10SVYR |
| Orbital characteristics | |
| Observation arc | 1.37 years (502 days) |
| Earliest precovery date | 9 April 2022 |
| Number of observations | 2060 |
| Aphelion | 90000+ AU (inbound) |
| Perihelion | 0.3914 AU (58.6 million km) |
| Eccentricity | 0.999992 (epoch 1800) 1.000008 (epoch 2200) |
| Orbital period | millions of years (inbound) possible ejection (outbound) |
| Max. orbital speed | 67.33 km/s @ perihelion |
| Inclination | 139.1° |
Longitude of ascending node | 21.56° |
| Argument of periapsis | 308.5° |
| Next perihelion | 27 September 2024 18:00 ± 20 minutes (3-sigma) |
| Earth MOID | 0.275 AU (41.1 million km; 107 LD) |
| Comet total magnitude (M1) | 4.3 ± 0.3 |
| Comet nuclear magnitude (M2) | 9.2 ± 0.3 |
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