C/2019 O3 (Palomar)
| Discovery[1] | |
|---|---|
| Discovery site | Palomar Observatory |
| Discovery date | 26 July 2019 |
| Orbital characteristics[2][3] | |
| Epoch | 22 March 2022 (JD 2459660.5) |
| Observation arc | 5.71 years |
| Earliest precovery date | 14 May 2019 |
| Number of observations | 2,138 |
| Aphelion | ~58,000 AU (inbound) ~14,000 AU (outbound) |
| Perihelion | 8.820 AU |
| Semi-major axis | ~29,000 AU (inbound) ~7,000 AU (outbound) |
| Eccentricity | 0.99969 (inbound) 0.99874 (outbound) |
| Orbital period | ~4.9 million years (inbound) ~590,000 years (outbound) |
| Inclination | 89.819° |
| 300.39° | |
| Argument of periapsis | 60.096° |
| Mean anomaly | 0.0031° |
| Last perihelion | 8 March 2021 |
| Earth MOID | 8.273 AU |
| Jupiter MOID | 5.492 AU |
| Physical characteristics[6] | |
Mean radius | >7.9 km (4.9 mi)[4] |
| |
| Comet total magnitude (M1) | 6.1[3] |
| Comet nuclear magnitude (M2) | 8.0[3] |
| 13.6 (2021 apparition)[5] | |
C/2019 O3 (Palomar) is a distant Oort cloud comet that came to perihelion on 8 March 2021 at a distance of 8.82 AU (1.319 billion km) from the Sun. It is discovered from the Palomar Observatory in July 2019, and is one of eight comets named after it.[1]
References
- ^ a b Q. Z. Ye; F. J. Masci; R. Haver; et al. (July 2019). D. W. Green (ed.). "Comet C/2019 O3 (Palomar)". Central Bureau for Astronomical Telegrams. 4817: 1. Bibcode:2020CBET.4817....1Y.
- ^ Horizons output. "Barycentric Osculating Orbital Elements for Comet Lemmon (C/2019 O3)". Retrieved 1 December 2025. (Solution using the Solar System's barycenter (Sun+Jupiter). Select Ephemeris Type:Elements and Center:@0)
- ^ a b c "C/2019 O3 (Palomar) – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 1 December 2025.
- ^ A. S. Betzler (2024). "A Study of the Comets with Large Perihelion Distances C/2019 L3 (ATLAS) and C/2019 O3 (Palomar)". Research in Astronomy and Astrophysics. 24 (9). Bibcode:2024RAA....24i5018B. doi:10.1088/1674-4527/ad7079.
- ^ "Observation list for C/2019 O3". COBS – Comet OBServation database. Retrieved 1 December 2025.
- ^ T. Hromakina; I. Belskaya; Y. Krugly; et al. (2021). "Small Solar System objects on highly inclined orbits. Surface colours and lifetimes" (PDF). Astronomy & Astrophysics. 647 (A71): 1–14. arXiv:2101.04541. Bibcode:2021A&A...647A..71H. doi:10.1051/0004-6361/202039737.
External links
- C/2019 O3 at the JPL Small-Body Database
- C/2019 O3 at Seiichi Yoshida's website