58534 Logos

58534 Logos
Discovery
Discovered by C. A. Trujillo,
J. Chen,
D. C. Jewitt,
J. X. Luu
Discovery date February 4, 1997
Designations
MPC designation 58534 Logos
Pronunciation  /ˈloʊɡɒs/ loh-goss or /ˈlɒɡɒs/ log-oss, or as in Greek: λόγος
Named after Logos
Alternate name(s) 1997 CQ29
Minor planet
category		 Cubewano[1]
Adjective Logian
Epoch August 27, 2011 (JD 2455800.5)
Aphelion 50.50 AU
Perihelion 39.675 AU
Semi-major axis 45.09 AU
Eccentricity 0.1201
Orbital period 302.8 a (110589 d)
Average orbital speed 4.41 km/s
Mean anomaly 55.52°
Inclination 2.9015°
Longitude of ascending node 132.612°
Argument of perihelion 334.74°
Satellites Zoe[3]
(~66 km in diameter)
Physical characteristics
Dimensions 77 ± 18 km[4]
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[4]
Temperature ~37 K
Spectral type ?
Absolute magnitude (H) 6.6

58534 Logos ( /ˈloʊɡɒs/ loh-goss or /ˈlɒɡɒs/ log-oss; or as in Greek: λόγος) is a small Kuiper-belt object, more specifically a cubewano, notable for having a comparatively large satellite named Zoe. For a small KBO, about 80 km in diameter, it has a very high albedo.[4] The system mass is 4.58 ± 0.07×1017 kg.[5]

In the Gnostic tradition, Logos and Zoe are a paired emanation of the deity, and part of its creation myth.†

Contents

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 ( /ˈzoʊ.iː/; from Greek: Ζωή). It orbits Logos with a semi-major axis of 8217 ± 42 km in 309.9 ± 0.2 d with an eccentricity of 0.546 ± 0.008.[5] Its estimated diameter is 66 km,[3] and mass (0.15 ± 0.02)×1018 kg.

Orbit

References

  1. ^ 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. 
  2. ^ JPL Small-Body Database Browser
  3. ^ 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. 
  4. ^ 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. arXiv:astro-ph/0502229. Bibcode 2005Icar..176..184G. doi:10.1016/j.icarus.2005.01.007.  (Preprint on arXiv.)
  5. ^ a b Five New and Three Improved Mutual Orbits of Transneptunian Binaries

External links

(58533) 1997 CD12•58534 Logos• 58535 Pattillo
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