324P/La Sagra
Semi-major axis 3.094 AU | | |
| Eccentricity | 0.1538 | |
|---|---|---|
| Orbital period | 5.44 years | |
| Inclination | 21.42° | |
| 270.65° | ||
| Argument of periapsis | 58.90° | |
| Last perihelion | 5 May 2021[2] | |
| Earth MOID | 1.67 AU | |
| Jupiter MOID | 1.83 AU | |
| Physical characteristics | ||
Mean diameter | 1.6 km [3] 1.1±0.1 km [4] | |
| Comet total magnitude (M1) | 7.5 [3] | |
| Comet nuclear magnitude (M2) | 15.6 [3] | |
324P/La Sagra is an active asteroid with an orbital period of 5.44 years. It has been found to be active in more than one perihelia, indicating that the source of activity is sublimation.[5]
The asteroid was first noticed in images taken by La Sagra Observatory on 14.9 September 2010 with a 0.45-m f/2.8 reflector by J. Nomen, who also noticed it was diffuse. The asteroid was also found in images obtained in 13 August, but showed no cometary features. On 17 September was noticed that it has a coma with a diameter of 6 arcseconds and a tail 11 arcseconds long.[1]
The comet was recovered on 21 March 2015 by Scott S. Sheppard at Las Campanas Observatory.[6] The object was one magnitude brighter than expected, indicating dust production at a heliocentric distance of 2.8 AU, and in May and June a dust tail was observed.[5]
The nucleus of the comet has an
It exhibits non-gravitational acceleration due to outgassing.[9]
References
- ^ a b Nomen, J.; Birtwhistle, P.; Holmes, R.; Foglia, S.; Scotti, J. V. (1 September 2010). "Comet P/2010 R2 (la Sagra)". Central Bureau Electronic Telegrams. 2459: 1.
- ^ "324P/La Sagra (2021)". www.aerith.net. Retrieved 29 March 2023.
- ^ a b c d "Small-Body Database Lookup: 324P/SOHO". ssd.jpl.nasa.gov. Retrieved 29 March 2023.
- ^ S2CID 118407966.
- ^ .
- ^ Gareth, Williams (26 May 2015). "MPEC 2015-K101: P/2010 R2 = 2015 K3 (LA SAGRA)". Minor Planet Electronic Circulars. Retrieved 29 March 2023.
- S2CID 119293534.
- S2CID 120598974.
- S2CID 119064414.
External links
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