475 Ocllo
| Discovery[1] | |
|---|---|
| Discovered by | D. Stewart |
| Discovery date | 14 August 1901 |
| Designations | |
| 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) | |
Average orbital speed | 17.81 km/s |
| 174.037° | |
| 0° 14m 9.096s / day | |
| Inclination | 18.926° |
| 34.496° | |
| 305.68° | |
| Earth MOID | 0.670978 AU (100.3769 Gm) |
| Jupiter MOID | 2.09239 AU (313.017 Gm) |
| TJupiter | 3.241 |
| Physical characteristics | |
| Dimensions | 11–25 km[3] |
| 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 (0.30480 d)[2][4] | |
| 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.[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". astorb. Lowell Observatory.
- ^ a b c d e "JPL Small-Body Database Browser: 475 Ocllo (1901 HN)". Jet Propulsion Laboratory. Retrieved 9 May 2016.
- ^ "Absolute Magnitude (H)". NASA/JPL. Retrieved 2015-06-14.
- ^ a b 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, vol. 38, no. 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
