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.[4][5] It is the second known Solar System comet to become interstellar after experiencing a planetary encounter.[5][1] C/1980 E1 (Bowell) reached a hyperbolic trajectory after an encounter with Jupiter on 9 December 1980.[6][7] C/2024 L5 experienced a very close encounter at 0.0048 AU with Saturn on 24 January 2022.[2][5][1] C/2024 L5 could be a former retrograde, inactive Centaur.[8] The receding velocity of C/2024 L5 when entering interstellar space will be 2.8 km/s, moving towards the constellation of Triangulum.[8]
| Discovery | |
|---|---|
| Discovered by | L. Denneau, R. Siverd, J. Tonry, H. Weiland |
| Discovery date | 14 June 2024 |
| Designations | |
| A117uUD[1] | |
| Orbital characteristics | |
| Epoch | 2024-Jul-22 |
| Observation arc | 103 days |
| Number of observations | 247 |
| Orbit type | hyperbolic[2][3] |
| Perihelion | 3.4320 AU[2] |
| Eccentricity | 1.03743[2] |
| Inclination | 166.5729° |
| 139.166° | |
| Argument of periapsis | 290.521° |
| Next perihelion | 10 March 2025 |
| Earth MOID | 2.46255 AU[2] |
| Jupiter MOID | 0.00496514 AU |
| Comet total magnitude (M1) | 6.7 |
Orbit
editJPL Horizons shows an outbound eccentricity greater than 1[3] 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.[1]
See also
editReferences
edit- ^ a b c d 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.
- ^ a b c d e "JPL Small-Body Database Browser: C/2024 L5 (ATLAS)". Jet Propulsion Laboratory. Retrieved 19 August 2024.
- ^ a b "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.
- ^ a b c "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) - ^ a b de la Fuente Marcos, Raúl; de la Fuente Marcos, Carlos; Aarseth, Sverre J. (7 October 2024). "Ejected from home: C/1980 E1 (Bowell) and C/2024 L5 (ATLAS)". Astronomy & Astrophysics. arXiv:2410.01975. Bibcode:2024arXiv241001975D. doi:10.1051/0004-6361/202451920.
External links
edit- C/2024 L5 at the JPL Small-Body Database
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