475 Ocllo
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| Discovery and designation | |
|---|---|
| Discovered by | D. Stewart |
| Discovery date | August 14, 1901 |
| Designations | |
| Alternative names |
1901 HN; 1959 JS; 1979 DD |
| Minor planet category | Mars-crosser |
| Orbital characteristics | |
| Epoch February 4, 2008 (JD 2454500.5) | |
| Aphelion | 535.940 Gm (3.583 AU) |
| Perihelion | 239.463 Gm (1.601 AU) |
| Semi-major axis | 387.702 Gm (2.592 AU) |
| Eccentricity | 0.382 |
| Orbital period | 1523.902 d (4.17 a) |
| Average orbital speed | 17.81 km/s |
| Mean anomaly | 161.645° |
| Inclination | 18.917° |
| Longitude of ascending node | 34.592° |
| Physical characteristics | |
| Dimensions | 31.0 km |
| Mass | 3.1×1016? kg |
| Mean density | 2.0? g/cm³ |
| Equatorial surface gravity | 0.0087? m/s² |
| Equatorial escape velocity | 0.0164? km/s |
| Rotation period | 7.3151[1] h |
| Geometric albedo | 0.10? |
| Temperature | ~173 K |
| Absolute magnitude (H) | 11.88 |
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475 Ocllo is an asteroid orbiting the Sun. It was discovered by American astronomer DeLisle Stewart on August 14, 1901 and assigned a provisional name of 1901 HN.[2][3]
Photometric observations of this asteroid at the Organ Mesa Observatory in Las Cruces, New Mexico during 2010 gave a light curve with a period of 7.3151 ± 0.0002 hours and a brightness variation of 0.66 ± 0.04 in magnitude.[1]
References
- ↑ 1.0 1.1 Pilcher, Frederick (April 2011), "Rotation Period Determinations for 25 Phocaea, 140 Siwa, 149 Medusa 186 Celuta, 475 Ocllo, 574 Reginhild, and 603 Timandra", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 38 (2): 76-78, Bibcode:2011MPBu...38...76P.
- ↑ Pickering, Edward C. (1905). "Positions of (475) Ocllo during 1904". Astronomische Nachrichten 169 (8-9): 139–142. Bibcode:1905AN....169..139P. doi:10.1002/asna.19051690806. ISSN 0004-6337.
- ↑ Kreutz, H. (1904). "Planet (475) Ocllo". Astronomische Nachrichten 167 (21): 349–350. doi:10.1002/asna.19041672106. ISSN 0004-6337.
External links
- Yeomans, Donald K., "475 Ocllo", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-30.
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