5143 Heracles
5143 Heracles(provisional designation 1991 VL) is a highly eccentric, rare-type asteroid and synchronous binary system, classified as near-Earth object of the Apollo group, approximately 4.8 kilometers in diameter. The asteroid was discovered on 7 November 1991, by American astronomer Carolyn Shoemaker at Palomar Observatory in California, United States. It is named for the Greek divine hero Heracles. It has an Earth minimum orbit intersection distance of 0.058 AU (8.7 million km) and is associated with the Beta Taurids daytime meteor shower.
| Discovery | |
|---|---|
| Discovered by | C. Shoemaker |
| Discovery site | Palomar Obs. |
| Discovery date | 7 November 1991 |
| Designations | |
MPC designation | (5143) Heracles |
| Pronunciation | /ˈhɛrəkliːz/ |
Named after | Ἡρακλῆς Hēraklēs (Greek mythology) |
Alternative designations | 1991 VL · 1962 PG |
Minor planet category | Apollo · NEO |
| Adjectives | Heraclean /hɛrəˈkliːən/ |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 63.58 yr (23,224 days) |
| Earliest precovery date | 30 November 1953 |
| Aphelion | 3.2494 AU |
| Perihelion | 0.4174 AU |
Semi-major axis | 1.8334 AU |
| Eccentricity | 0.7723 |
Orbital period (sidereal) | 2.48 yr (907 days) |
Mean anomaly | 93.744° |
Mean motion | 0° 23m 49.2s / day |
| Inclination | 9.0330° |
Longitude of ascending node | 309.52° |
| 227.77° | |
| Known satellites | 1 (0.6±0.3 km; orb. 17 h) |
| Earth MOID | 0.0584 AU · 22.8 LD |
| Physical characteristics | |
| Dimensions | 3.26 km 3.28±0.09 km 3.41 km 4.5±0.7 km 4.83 km (taken) 4.833 km 4.843±0.378 km |
Synodic rotation period | 2.704±0.002 h 2.7060±0.0002 h 2.706±0.001 h 2.7063 h 2.7065±0.0005 h 3.0149±0.0002 h 5.990±0.0111 h |
| 0.1481 0.20±0.05 0.227±0.054 0.38 0.40±0.22 0.412±0.030 0.42 | |
| SMASS = O Q · C · O V–R = 0.420±0.070 | |
| 13.786±0.004 (R) · 13.8 · 14.0 · 14.10±0.04 · 14.27 · 14.27±0.09 · 14.52±0.02 (R) | |
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