2678 Aavasaksa
| Discovery | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Obs. |
| Discovery date | 24 February 1938 |
| Designations | |
| MPC designation | 2678 Aavasaksa |
|
Named after
|
Aavasaksa (hill in Finnish Lapland) |
|
1938 DF1 · 1952 KM 1955 DH · 1977 SX1 1979 FP2 · A916 WA |
|
| main-belt · Flora | |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 78.29 yr (28,596 days) |
| Aphelion | 2.4553 AU |
| Perihelion | 2.0637 AU |
| 2.2595 AU | |
| Eccentricity | 0.0867 |
| 3.40 yr (1,241 days) | |
| 145.96° | |
| 0° 17m 24.72s / day | |
| Inclination | 3.4446° |
| 54.033° | |
| 45.905° | |
| Physical characteristics | |
| Dimensions | 8.19 km (calculated) 8.371±0.096 km |
| 24 h | |
| 0.24 (assumed) 0.276±0.037 |
|
| S | |
| 12.4 · 12.6 | |
2678 Aavasaksa, provisional designation 1938 DF1, is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 24 February 1938, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland.
The S-type asteroid is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun at a distance of 2.1–2.5 AU once every 3 years and 5 months (1,241 days). Its orbit has an eccentricity of 0.09 and an inclination of 3° with respect to the ecliptic. The first precovery was obtained at Bergedorf Observatory in 1916, extending the asteroid's observation arc by 22 years prior to its discovery.
In January 2009, a provisional and fragmentary photometric light-curve analysis performed at the U.S. Via Capote Observatory,California, gave it a somewhat longer than average rotation period of 24 hours with a brightness amplitude of 0.4 in magnitude (U=1). According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, the asteroid measures 8.4 kilometers in diameter and its surface has an albedo of 0.28, while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24, derived from the Flora family's largest member and namesake, 8 Flora, and calculates a diameter of 8.2 kilometers.
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