3102 Krok
3102 Krok, provisional designation 1981 QA, is a rare-type asteroid and slow rotator, classified as a near-Earth object of the Amor group, that measures approximately 1.5 kilometers in diameter.
| Discovery | |
|---|---|
| Discovered by | L. Brožek |
| Discovery site | Kleť Obs. |
| Discovery date | 21 August 1981 |
| Designations | |
MPC designation | (3102) Krok |
Named after | Duke Krok (legendary Czech figure) |
Alternative designations | 1981 QA |
Minor planet category | NEO · Amor |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 35.44 yr (12,944 days) |
| Aphelion | 3.1174 AU |
| Perihelion | 1.1839 AU |
Semi-major axis | 2.1506 AU |
| Eccentricity | 0.4495 |
Orbital period (sidereal) | 3.15 yr (1,152 days) |
Mean anomaly | 86.843° |
Mean motion | 0° 18m 45s / day |
| Inclination | 8.4439° |
Longitude of ascending node | 172.09° |
| 154.78° | |
| Earth MOID | 0.1840 AU · 71.7 LD |
| Physical characteristics | |
| Dimensions | 1.48 km (derived) 1.6 km |
Synodic rotation period | 147.8±0.3 h 149.4±1 h 151.8 |
| 0.20 (assumed) | |
| QRS (Tholen) S (SMASS) Sqw · QRS B–V = 0.834 U–B = 0.521 | |
| 16.14±0.2 (R) · 16.2 · 16.40±0.15 · 16.47±0.35 · 16.524±0.15 | |
It was discovered on 21 August 1981, by Slovak astronomer Ladislav Brožek at Kleť Observatory in the Czech Republic. The asteroid was named after Duke Krok a legendary Czech figure.
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