1179 Mally
| Discovery | |
|---|---|
| Discovered by | M. F. Wolf |
| Discovery site | Heidelberg Obs. |
| Discovery date | 19 March 1931 |
| Designations | |
| MPC designation | 1179 Mally |
|
Named after
|
Mally Wolf (discoverer's family) |
| 1931 FD | |
| main-belt · (middle) | |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 85.23 yr (31,131 days) |
| Aphelion | 3.0675 AU |
| Perihelion | 2.1695 AU |
| 2.6185 AU | |
| Eccentricity | 0.1715 |
| 4.24 yr (1,548 days) | |
| 57.991° | |
| 0° 13m 57.36s / day | |
| Inclination | 8.7071° |
| 6.8104° | |
| 234.09° | |
| Physical characteristics | |
| Dimensions | 10.65 km (calculated) 13.159±0.183 km 13.379±0.077 km 14.41±0.47 km |
| 46.6917±0.1516 h | |
|
0.059±0.020 0.0683±0.0080 0.071±0.017 0.10 (assumed) |
|
| S | |
| 12.530±0.002 (R) · 12.8 · 12.9 · 12.98 | |
1179 Mally, provisional designation 1931 FD, is an asteroid and long-lost minor planet from the middle region of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 19 March 1931, by German astronomer Max Wolf at Heidelberg Observatory in Southern Germany.
Mally orbits the Sun at a distance of 2.2–3.1 AU once every 4 years and 3 months (1,548 days). Its orbit has an eccentricity of 0.17 and an inclination of 9° with respect to the ecliptic. After its initial discovery in 1931, it became one of few well known lost minor planets for over 55 years. In 1986, Mally was rediscovered by Lutz D. Schmadel, Richard Martin West and Hans-Emil Schuster, who remeasured the original discovery plates and computed alternative search ephemerides. This allowed them to find the body very near to its predicted position. In addition, historic photographic plates from the Palomar Sky Survey (1956–1958), the UK Schmidt Telescope (Australia), and the ESO Schmidt Telescope (Chile) confirmed the rediscovery.
According to the 2014-published results from the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Mally measures between 13.2 and 14.4 kilometers in diameter, and its surface has an albedo between 0.059 and 0.071, while the Collaborative Asteroid Lightcurve Link (CALL) assumes an albedo of 0.10 and calculates a diameter of 10.7 kilometers, based on an absolute magnitude of 12.98. In addition, CALL classifies it as a stony S-type body, despite its low albedo.
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