728 Leonisis
main-belt asteroid
728 Leonisis is an asteroid of the Flora family, found by Johann Palisa in 1912 in Vienna. Its provisional name was 1912 NU.
| Discovery | |
|---|---|
| Discovered by | J. Palisa |
| Discovery date | 16 February 1912 |
| Designations | |
| MPC designation | (728) Leonisis |
| Pronunciation | /liːəˈnaɪsɪs/ |
| 1912 NU; A907 UE; 1941 WR; 1968 UT | |
| Main belt (Flora family) | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 103.98 yr (37979 d) |
| Aphelion | 2.4509 AU (366.65 Gm) |
| Perihelion | 2.0561 AU (307.59 Gm) |
| 2.2535 AU (337.12 Gm) | |
| Eccentricity | 0.087584 |
| 3.38 yr (1235.6 d) | |
Average orbital speed | 19.80 km/s |
| 317.487° | |
| 0° 17m 28.86s / day | |
| Inclination | 4.2564° |
| 82.661° | |
| 55.396° | |
| Physical characteristics | |
| 5.5783 h (0.23243 d)[1][2] | |
| A or Ld | |
| 13.0 | |
Astronomers are not sure what its spectral class is. It has been previously placed in the rare A and L classes.[3] These are generally "stony" spectra, but with significant differences from the usual S-type. The unusual spectrum brings Leonisis' membership in the Flora family into doubt.
References
change- ↑ 1.0 1.1 Yeomans, Donald K., "728 Leonisis", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 5 May 2016.
- ↑ Pilcher, Frederick (July 2010), "Period Determinations for 11 Parthenope, 35 Leukothea, 38 Leda, 111 Ate, 194 Prokne, 262 Valda, 728 Leonisis, and 747 Winchester", The Minor Planet Bulletin, 37 (3): 119–122, Bibcode:2010MPBu...37..119P.
- ↑ "Asteroid Taxonomy | PDS SBN Asteroid/Dust Subnode".
Other websites
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