Janina (minor planet designation: 383 Janina) is a Themistian asteroid, approximately 46 kilometers (29 miles) in diameter.[2] It is spectral B-type and is probably composed of primitive carbonaceous chondritic material.[3]
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 29 January 1894 |
| Designations | |
MPC designation | (383) Janina |
| Pronunciation | French: [ʒanina] German: [jaːˈniːnaː][1] |
Alternative designations | 1894 AU |
Minor planet category | Main belt (Themis) |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 122.21 yr (44637 d) |
| Aphelion | 3.65762 AU (547.172 Gm) |
| Perihelion | 2.63074 AU (393.553 Gm) |
Semi-major axis | 3.14418 AU (470.363 Gm) |
| Eccentricity | 0.16330 |
Orbital period (sidereal) | 5.58 yr (2036.4 d) |
Mean anomaly | 77.0719° |
Mean motion | 0° 10m 36.422s / day |
| Inclination | 2.65252° |
Longitude of ascending node | 93.0518° |
Argument of perihelion | 322.137° |
| Physical characteristics | |
Mean diameter | 45.52±1.8 km[2] |
Synodic rotation period | 6.4 h (0.27 d)[2] |
Geometric albedo | 0.0926±0.008[2] |
Spectral type | B[2] |
Absolute magnitude (H) | 9.91[2] |
It was discovered by Auguste Charlois on 29 January 1894 in Nice.[2][4] The reference of the name is unknown, though it is the French name of Ioannina in Greece, as well as a common German woman's name, both of which probably descend from Johannes.[4]
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