1036 Ganymed
1036 Ganymed, provisional designation 1924 TD, is a stony asteroid on a highly eccentric orbit, classified as a near-Earth object of the Amor group. It was discovered by German astronomer Walter Baade at the Bergedorf Observatory in Hamburg on 23 October 1924, and named after Ganymede from Greek mythology. With a diameter of approximately 35 kilometers (22 miles), Ganymed is the largest of all near-Earth objects but does not cross Earth's orbit. The S-type asteroid has a rotation period of 10.3 hours. In October 2024, it is predicted to approach Earth at a distance of 56,000,000 km; 35,000,000 mi (0.374097 AU).
Shape model of Ganymed from its lightcurve | |
| Discovery | |
|---|---|
| Discovered by | W. Baade |
| Discovery site | Bergedorf Obs. |
| Discovery date | 23 October 1924 |
| Designations | |
MPC designation | (1036) Ganymed |
| Pronunciation | /ˈɡænəmɛd/ |
Named after | Ganymede (Greek mythology) |
Alternative designations | 1924 TD · 1952 BF 1954 HH |
Minor planet category | Amor · NEO |
| Adjectives | Ganymedean /ɡænəˈmiːdiən/ |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 93.69 yr (34,221 d) |
| Aphelion | 4.0837 AU |
| Perihelion | 1.2421 AU |
Semi-major axis | 2.6629 AU |
| Eccentricity | 0.5335 |
Orbital period (sidereal) | 4.35 yr (1,587 d) |
Mean anomaly | 183.36° |
Mean motion | 0° 13m 36.48s / day |
| Inclination | 26.693° |
Longitude of ascending node | 215.55° |
| 132.45° | |
| Earth MOID | 0.3415 AU (133 LD) |
| Mars MOID | 0.03287 AU |
| Physical characteristics | |
| Dimensions | 39.3 km × 18.9 km |
Mean diameter | 31.66±2.8 km 35.01±0.78 km 37.675±0.399 km |
Synodic rotation period | 10.297 h |
| 0.218 0.243 0.2926 | |
| Tholen = S SMASS = S S U–B = 0.417 B–V = 0.882±0.008 V–R = 0.515±0.004 V–I = 0.981±0.005 | |
| 9.45 9.50 | |
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