Astronomy:475 Ocllo
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Short description: Mars-crossing asteroid
| Discovery[1] | |
|---|---|
| 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 | |
| Minor planet category | Mars-crosser |
| Orbital characteristics[1][2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 97.47 yr (35601 d) |
| |{{{apsis}}}|helion}} | 3.5821 astronomical unit|AU (535.87 Gm) |
| |{{{apsis}}}|helion}} | 1.60661 AU (240.345 Gm) |
| 2.59436 AU (388.111 Gm) | |
| Eccentricity | 0.38073 |
| Orbital period | 4.18 yr (1526.3 d) |
| Mean anomaly | 174.037° |
| Mean motion | 0° 14m 9.096s / day |
| Inclination | 18.926° |
| Longitude of ascending node | 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 |
| Rotation period | 7.3151 h (0.30480 d)[2][4] |
| X[2] | |
| Absolute magnitude (H) | 11.88[2] |
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]
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". Lowell Observatory. http://ftp.lowell.edu/pub/elgb/astorb.html.
- ↑ 2.0 2.1 2.2 2.3 2.4 "JPL Small-Body Database Browser: 475 Ocllo (1901 HN)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=475.
- ↑ "Absolute Magnitude (H)". NASA/JPL. http://neo.jpl.nasa.gov/glossary/h.html.
- ↑ 4.0 4.1 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. doi:10.1002/asna.19051690806. ISSN 0004-6337. Bibcode: 1905AN....169..139P. https://zenodo.org/record/1424815.
- ↑ Kreutz, H. (1904). "Planet (475) Ocllo". Astronomische Nachrichten 167 (21): 349–350. doi:10.1002/asna.19041672106. ISSN 0004-6337. https://zenodo.org/record/1424807.
External links
- 475 Ocllo at AstDyS-2, Asteroids—Dynamic Site
- 475 Ocllo at the JPL Small-Body Database
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