| Discovery | |
|---|---|
| Discovered by | L. Denneau R. Siverd J. Tonry H. Weiland |
| Discovery site | ATLAS South Africa |
| Discovery date | 14 June 2024 |
| Designations | |
| Alternative designations | A117uUD |
| Orbital characteristics | |
| Epoch | 22 July 2024 (JD 2460513.5) |
| Observation arc | 103 days |
| Number of observations | 247 |
| Orbit type | Hyperbolic |
| Perihelion | 3.4320 AU |
| Eccentricity | 1.03743 |
| Inclination | 166.573° |
| Longitude of ascending node | 139.166° |
| Argument of periapsis | 290.521° |
| Next perihelion | 10 March 2025 |
| Earth MOID | 2.46255 AU |
| Jupiter MOID | 0.00497 AU |
| Comet total magnitude (M1) | 6.7 |
C/2024 L5 (ATLAS) is a comet that was discovered on 14 June 2024 as A117uUD by the Asteroid Terrestrial-impact Last Alert System (ATLAS), South Africa, Sutherland. It will reach perihelion on 10 March 2025 at 3.432 AU (513.4 million km) from the Sun.
It is the second known Solar System comet to become interstellar after experiencing a planetary encounter. C/1980 E1 (Bowell) reached a hyperbolic trajectory after an encounter with Jupiter on 9 December 1980. C/2024 L5 experienced a very close encounter at 0.0048 AU with Saturn on 24 January 2022. C/2024 L5 could be a former retrograde, inactive centaur. The receding velocity of C/2024 L5 when entering interstellar space will be 2.8 km/s, moving towards the constellation of Triangulum.
Orbit
JPL Horizons shows an outbound eccentricity greater than 1 so it will leave the Solar System eventually as C/1980 E1 (Bowell) is doing, but prior to its flyby to Saturn its eccentricity was 0.88.
See also
- List of Solar System objects by greatest aphelion
- List of hyperbolic comets
- List of non-periodic comets
- List of periodic comets
- 1I/ʻOumuamua
- 2I/Borisov
- C/1980 E1 (Bowell)
References
- ^ de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (23 July 2024). "Comet A117uUD Goes Interstellar after Encountering Saturn in 2022". Research Notes of the American Astronomical Society. 8 (7): 184 (3 pages). Bibcode:2024RNAAS...8..184D. doi:10.3847/2515-5172/ad65fc.
- ^ "C/2024 L5 (ATLAS) – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 19 August 2024.
- ^ "JPL Horizons On-Line Ephemeris for C/2024 L5 at epoch 1950 and 2100 (barycentric)". JPL Horizons On-Line Ephemeris System. Jet Propulsion Laboratory. Retrieved 23 July 2024. Solution using the Solar System Barycenter. Ephemeris Type:Elements and Center:@0 (To be outside planetary region, inbound epoch 1950 and outbound epoch 2100. Aphelia/orbital periods defined while in the planetary-region are misleading for knowing the long-term inbound/outbound solutions.)
- "MPEC 2024-O15: COMET C/2024 L5 (ATLAS)". Minor Planet Electronic Circulars. Minor Planet Center. 20 July 2024.
- ^ "Electronic Telegram No. 5418". Central Bureau Electronic Telegrams. 20 July 2024.
- Buffoni, L.; Scardia, M.; Manara, A. (1 May 1982). "The orbital evolution of comet Bowell (1980b)". The Moon and the Planets. 26 (3): 311–315. Bibcode:1982M&P....26..311B. doi:10.1007/BF00928013.
- Branham, R. L., Jr. (1 April 2013). "New Orbits for Comets C/1960 M1 (Humason), C/1980 E1 (Bowell), and Musings on Extrasolar Comets". Revista Mexicana de Astronomía y Astrofísica. 49 (1): 111–116. Bibcode:2013RMxAA..49..111B.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ de la Fuente Marcos, Raúl; de la Fuente Marcos, Carlos; Aarseth, Sverre J. (24 October 2024). "Ejected from home: C/1980 E1 (Bowell) and C/2024 L5 (ATLAS)". Astronomy & Astrophysics. 690 (1): A395 (8 pages). arXiv:2410.01975. Bibcode:2024arXiv241001975D. doi:10.1051/0004-6361/202451920.
External links
- C/2024 L5 at the JPL Small-Body Database
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