475 Ocllo
| Discovery | |
|---|---|
| Discovered by | D. Stewart |
| Discovery date | August 14, 1901 |
| Designations | |
|
1901 HN; 1959 JS; 1979 DD | |
| 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) |
| 387.702 Gm (2.592 AU) | |
| Eccentricity | 0.382 |
| 1523.902 d (4.17 a) | |
Average orbital speed | 17.81 km/s |
| 161.645° | |
| Inclination | 18.917° |
| 34.592° | |
| Physical characteristics | |
| Dimensions | 11–25 km[1] |
| 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 |
| 7.3151 h[2][3] | |
| Temperature | ~173 K |
| X[2] | |
| 11.88[2] | |
|
| |
475 Ocllo is a large Mars-crossing asteroid.[2] It was discovered by American astronomer DeLisle Stewart on August 14, 1901 and assigned a provisional name of 1901 HN.[4][5]
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.[3]
References
- ↑ "Absolute Magnitude (H)". NASA/JPL. Retrieved 2015-06-14.
- 1 2 3 4 "JPL Small-Body Database Browser: 475 Ocllo (1901 HN)". Jet Propulsion Laboratory.
- 1 2 Pilcher, Frederick (April 2011), "Rotation Period Determinations for 25 Phocaea, 140 Siwa, 149 Medusa 186 Celuta, 475 Ocllo, 574 Reginhild, and 603 Timandra", The Minor Planet Bulletin 38 (2), pp. 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
- 475 Ocllo at the JPL Small-Body Database
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