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Discovery
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| Discovered by | C. A. Trujillo, J. Chen, D. C. Jewitt, J. X. Luu |
| Discovery date | February 4, 1997 |
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Designations
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| MPC designation | 58534 Logos |
| Pronunciation | /ˈloʊɡɒs/ LOH-goss or /ˈlɒɡɒs/ LOG-oss, or as in Greek: λόγος |
| Alternate name | 1997 CQ29 |
| Minor planet category |
Cubewano[1] |
| Epoch June 14, 2006 (JD 2453900.5) | |
| Aphelion | 7604.615 Gm (50.834 AU) |
| Perihelion | 5975.722 Gm (39.945 AU) |
| Semi-major axis | 6790.168 Gm (45.389 AU) |
| Eccentricity | 0.120 |
| Orbital period | 111694.329 d (305.80 a) |
| Average orbital speed | 4.41 km/s |
| Mean anomaly | 45.885° |
| Inclination | 2.898° |
| Longitude of ascending node | 132.564° |
| Argument of perihelion | 338.778° |
| Satellites | Zoe[2] (~66 km in diameter) |
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Physical characteristics
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| Dimensions | 77 ± 18 km[3] |
| Mass | 2.7 × 1017 kg |
| Mean density | 1.0 g/cm³ |
| Equatorial surface gravity | 0.0112 m/s² |
| Escape velocity | 0.0299 km/s |
| Sidereal rotation period |
? d |
| Albedo | 0.39 ± 0.17[3] |
| Temperature | ~37 K |
| Spectral type | ? |
| Absolute magnitude (H) | 6.6 |
58534 Logos is a Kuiper belt object, more specifically a cubewano. The object is notable for having a satellite, named Zoe.
For a small (80 km in diameter) KBO it has a very high albedo.[3]
In the Gnostic tradition, Logos and Zoe are a paired emanation of the deity, and part of its creation myth.†
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Zoe
Logos is a binary with the components of comparable size orbiting the barycentre on a moderately elliptical orbit.
Logos' companion was discovered on 17 November 2001 from Hubble Space Telescope observations by K. S. Noll, D. C. Stephens, W. M. Grundy, J. Spencer, R. L. Millis, M. W. Buie, D. Cruikshank, S. C. Tegler, and W. Romanishin and announced on 11 February 2002.
After the discovery, it received the provisional designation S/2001 (58534) 1. Once confirmed it was officially named (58534) Logos I Zoe (pronounced /ˈzoʊ.iː/, from Greek: Ζωή). It orbits Logos with a semi-major axis of 8010 ± 80 km in 312 ± 3 d with an eccentricity of 0.45 ± 0.03. Its estimated diameter is 66 km,[2] and mass (0.15 ± 0.02) × 1018 kg.
Orbit
References
- ^ Marc W. Buie (2003-05-31). "Orbit Fit and Astrometric record for 58534". SwRI (Space Science Department). http://www.boulder.swri.edu/~buie/kbo/astrom/58534.html. Retrieved 2008-09-28.
- ^ a b Wm. Robert Johnston (2007-03-04). "(58534) Logos and Zoe". Johnston's Archive. http://www.johnstonsarchive.net/astro/astmoons/am-58534.html. Retrieved 2009-10-06.
- ^ a b c Grundy, W. M; Noll, K. S.; Stephens, D. C. (2005). "Diverse albedos of small trans-neptunian objects". Icarus 176 (1): 184–191. doi:. (Preprint on arXiv.)
External links
- Orbital simulation from JPL (Java) / Ephemeris
- IAUC 7824
- IAUC 7959
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