Global Information961 Gunnie information
 Modelled shape of Gunnie from its lightcurve | |
| Discovery [1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 10 October 1921 |
| Designations | |
MPC designation | (961) Gunnie |
Named after |
|
Alternative designations | A921 TH · 1930 XT 1968 HO · 1921 KM |
Minor planet category | main-belt [1][3] · (middle) background [4][5] |
| Orbital characteristics [3] | |
| Epoch 31 May 2020 (JD 2459000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 98.23 yr (35,880 d) |
| Aphelion | 2.9391 AU |
| Perihelion | 2.4485 AU |
Semi-major axis | 2.6938 AU |
| Eccentricity | 0.0911 |
Orbital period (sidereal) | 4.42 yr (1,615 d) |
Mean anomaly | 181.91° |
Mean motion | 0° 13m 22.44s / day |
| Inclination | 10.991° |
Longitude of ascending node | 26.616° |
Argument of perihelion | 285.28° |
| Physical characteristics | |
Mean diameter |
|
Synodic rotation period | 21.361±0.002 h[9] |
Pole ecliptic latitude |
|
Geometric albedo |
|
Spectral type |
|
Absolute magnitude (H) | 11.5[1][3] |
961 Gunnie (prov. designation: A921 TH or 1921 KM) is a very dark background asteroid from the central regions of the asteroid belt, approximately 37 kilometers (23 miles) in diameter. It was discovered on 10 October 1921, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory.[1] The C/X-type asteroid has a rotation period of 21.4 hours. It was named after Gunnie Asplind, daughter of Swedish astronomer Bror Asplind (1890–1954).[2]
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