475 Ocllo
Ocllo (minor planet designation: 475 Ocllo) is a large Mars-crossing asteroid.[2] It was discovered by American astronomer DeLisle Stewart on August 14, 1901 and was assigned a provisional name of 1901 HN.[5][6]
| Discovery | |
|---|---|
| Discovered by | D. Stewart |
| Discovery date | 14 August 1901 |
| Designations | |
| (475) Ocllo | |
| Pronunciation | /ˈɒkloʊ/ |
Named after | Mama Uqllu, legendary first queen of the Kingdom of Cuzco |
| 1901 HN; 1959 JS; 1979 DD | |
| Mars-crosser | |
| Orbital characteristics[1][2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 97.47 yr (35601 d) |
| Aphelion | 3.5821 AU (535.87 Gm) |
| Perihelion | 1.60661 AU (240.345 Gm) |
| 2.59436 AU (388.111 Gm) | |
| Eccentricity | 0.38073 |
| 4.18 yr (1526.3 d) | |
| 174.037° | |
| 0° 14m 9.096s / day | |
| Inclination | 18.926° |
| 34.496° | |
| 305.68° | |
| Earth MOID | 0.670978 AU (100.3769 Gm) |
| Mars MOID | 0.3173 AU (47.47 Gm) |
| Physical characteristics | |
| Dimensions | 11–25 km[3] |
| Mass | 3.1×1016? kg |
Mean density | 2.0? g/cm³ |
| 7.3151 h (0.30480 d)[2][4] | |
| X[2] | |
| 11.88[2] | |
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.[4]
References
- "The Asteroid Orbital Elements Database". astorb. Lowell Observatory.
- "JPL Small-Body Database Browser: 475 Ocllo (1901 HN)". Jet Propulsion Laboratory. Retrieved 9 May 2016.
- "Absolute Magnitude (H)". NASA/JPL. Retrieved 14 June 2015.
- 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): 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 AstDyS-2, Asteroids—Dynamic Site
- 475 Ocllo at the JPL Small-Body Database
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