1139 Atami
From Infogalactic: the planetary knowledge core
| Discovery | |
|---|---|
| Discovered by | Okuro Oikawa and Kazuo Kubokawa |
| Discovery date | 1929-Dec-01 |
| Orbital characteristics | |
| Epoch Orbital Elements at Epoch 2454200.5 (2007-Apr-10.0) TDB | |
| Aphelion | 2.44538167801902 AU |
| Perihelion | 1.4506609472059 AU |
| 1.94802131261246 AU | |
| Eccentricity | 0.25531566938534 |
| 993.0908555984342 days 2.72 years |
|
| 172.9145575307504 ° | |
| Inclination | 13.0888203094939 ° |
| 213.4316068527716 ° | |
| 206.4535499752972 ° | |
| Known satellites | 1[2] |
| Physical characteristics | |
| Dimensions | ~6km[2] |
| 27.44 h | |
| S (Tholen) S (SSMASSII) | |
| 12.51 mag | |
1139 Atami is a Mars-crossing asteroid orbiting the Sun. It makes a revolution around the Sun once every 3 years. It completes one rotation once every 27 hours. It was discovered by Okuro Oikawa and Kazuo Kubokawa on December 1, 1929.[1] It is named after a harbor near Tokyo, Japan. Its provisional designation was 1929 XE.[3]
Binary system
Photometric and Arecibo echo spectra observations in 2005 confirmed a 5 km (3 mi) satellite orbiting at least 15 km (9 mi) from the primary.[2] Due to the similar size of the primary and secondary the Minor Planet Center lists this as a binary companion.[4]
References
External links
- Orbital simulation from JPL (Java) / Ephemeris
