1567 Alikoski
1567 Alikoski, provisional designation 1941 HN, is a rare-type carbonaceous asteroid from the outer region of the asteroid belt, approximately 67 kilometers in diameter. It was discovered on 22 April 1941, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. It was later named after Finnish astronomer Heikki Alikoski.
| Discovery | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Obs. |
| Discovery date | 22 April 1941 |
| Designations | |
MPC designation | (1567) Alikoski |
Named after | Heikki Alikoski (astronomer) |
Alternative designations | 1941 HN · 1947 HE 1947 HG · 1948 OC |
Minor planet category | main-belt · (outer) |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 78.55 yr (28,691 days) |
| Aphelion | 3.4785 AU |
| Perihelion | 2.9417 AU |
Semi-major axis | 3.2101 AU |
| Eccentricity | 0.0836 |
Orbital period (sidereal) | 5.75 yr (2,101 days) |
Mean anomaly | 135.05° |
Mean motion | 0° 10m 17.04s / day |
| Inclination | 17.279° |
Longitude of ascending node | 51.454° |
| 110.87° | |
| Physical characteristics | |
| Dimensions | 62.36±17.29 km 67.83±2.1 km (IRAS:12) 67.933±0.584 km 69.242±0.432 km 70.06±0.80 km 77.10±19.58 km |
Synodic rotation period | 16.405±0.01 h |
| 0.04±0.03 0.05±0.04 0.059±0.002 0.0624±0.0160 0.0626±0.004 (IRAS:12) | |
| PU (Tholen) C (SMASS) · C B–V = 0.720 | |
| 9.47 | |
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