| Discovery | |
|---|---|
| Discovered by | J. Palisa |
| Discovery date | 16 February 1912 |
| Designations | |
| (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 |
| 3.38yr (1235.6d) | |
Averageorbital 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 orLd | |
| 13.0 | |
728 Leonisis is anasteroid of theFlora family, discovered by Austrian astronomerJohann Palisa on 16 February 1912 fromVienna.[3]
There is some uncertainty as to its spectral class. It has been previously placed in the rareA andLd classes.[4] These are generally "stony" spectra, but with significant deviations from the usualS-type. The unusual spectrum brings Leonisis' membership in the Flora family into doubt.
Photometric observations of this asteroid from the Organ Mesa Observatory inLas Cruces, New Mexico, during 2010 gave alight curve with a period of 5.5783 ± 0.0002 hours and a brightness variation of 0.20 ± 0.04 magnitude.[2]
_mathilde.jpg) | This article about an S-type asteroid native to theasteroid belt is astub. You can help Wikipedia byexpanding it. |
