 Logos and its companion Zoe imaged by the Hubble Space Telescope in 2004 | |
| Discovery | |
|---|---|
| Discovered by | Mauna Kea Obs. (team disc.) |
| Discovery site | Mauna Kea Obs. |
| Discovery date | 4 February 1997 |
| Designations | |
| MPC designation | (58534) Logos |
| Pronunciation | /ˈloʊɡɒs/ or /ˈlɒɡɒs/ |
| Named after | Logos (Aeon in Ptolemy Gnostics) |
| Alternative designations | 1997 CQ29 |
| Minor planet category | TNO · cubewano cold |
| Adjectives | Logian /ˈlɒdʒiən/ |
| Orbital characteristics | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 3 | |
| Observation arc | 5582 days (15.28 yr) |
| Aphelion | 51.153 AU (7.6524 Tm) |
| Perihelion | 39.945 AU (5.9757 Tm) |
| Semi-major axis | 45.549 AU (6.8140 Tm) |
| Eccentricity | 0.12304 |
| Orbital period (sidereal) | 307.42 yr (112284 d) |
| Mean anomaly | 56.495° |
| Mean motion | 0° 0 11.542 / day |
| Inclination | 2.8946° |
| Longitude of ascending node | 132.491° |
| Argument of perihelion | 339.21° |
| Known satellites | Zoe (est. D: 66 km) |
| Physical characteristics | |
| Mean diameter | 77±18 km |
| Mass | 2.7×10 kg |
| Mean density | 1.0 g/cm |
| Geometric albedo | 0.39 ± 0.17 |
| Absolute magnitude (H) | 6.6 |
58534 Logos, or as a binary system (58534) Logos-Zoe, is a trans-Neptunian object and binary system from the classical Kuiper belt, approximately 77 kilometers (48 miles) in diameter. The bright cubewano belongs to the cold population and has a 66-kilometer (41 miles) sized companion named Zoe. The system mass is (4.58±0.07)×10 kg.
In the Gnostic tradition, Logos and Zoe are a paired emanation of the deity, and part of its creation myth.
Zoe
 Two bodies with similar mass orbiting around a common barycenter (red cross) with elliptic orbits. The interaction of Logos and Zoe is similar to this. | |
| Discovery | |
|---|---|
| Discovered by | Keith S. Noll et al. |
| Discovery date | 17 November 2001 |
| Designations | |
| Pronunciation | /ˈzoʊ.iː/ |
| Named after | Zoe (Ζωή) |
| Alternative designations | (58534) Logos I Zoe |
| Adjectives | Zoean /zoʊˈiːən/) |
| Orbital characteristics | |
| Semi-major axis | 8217 km |
| Eccentricity | 0.546 |
| Orbital period (sidereal) | 309.9 d |
| Satellite of | Logos |
| Physical characteristics | |
| Dimensions | 66 km |
| Mass | (1.5±0.2)×10 kg |
Logos is a binary with the components of comparable size orbiting the barycentre on a moderately elliptical orbit.
Logos was discovered on 4 February 1997, and its companion, Zoe, was discovered on 17 November 2001 from Hubble Space Telescope observations by K. S. Noll, D. C. Stephens, W. M. Grundy, J. Spencer, Robert Millis, Marc Buie, Dale 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. It orbits Logos with a semi-major axis of 8217 km in 309.9 days with an eccentricity of 0.546. Its estimated diameter is 66 km, and mass (0.15 ± 0.02)×10 kg.
Orbit
A 10-million-year integration of the orbit shows that it is a Classical Kuiper belt object that does not get closer to the Sun than 38.8 AU (5.80 billion km) or further than 52.1 AU.
References
- ^ "58534 Logos (1997 CQ29)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 April 2016.
- ^ Marc W. Buie (31 May 2003). "Orbit Fit and Astrometric record for 58534". SwRI (Space Science Department).
- Brown, Mike. "How many dwarf planets are there in the Solar System". Retrieved 17 February 2018.
- "Logian". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
- ^ Wm. Robert Johnston (4 March 2007). "(58534) Logos and Zoe". Johnston's Archive.
- ^ 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. S2CID 118866288.
- ^ Grundy, W. M.; Noll, K. S.; Nimmo, F.; Roe, H. G.; Buie, M. W.; Porter, S. B.; Benecchi, S. D.; Stephens, D. C.; Levison, H. F.; Stansberry, J. A. (2011). "Five new and three improved mutual orbits of transneptunian binaries" (PDF). Icarus. 213 (2): 678. arXiv:1103.2751. Bibcode:2011Icar..213..678G. doi:10.1016/j.icarus.2011.03.012. S2CID 9571163.
External links
- IAUC 7824 Archived 2006-05-01 at the Wayback Machine – IAUC 7959
- 58534 Logos at AstDyS-2, Asteroids—Dynamic Site
- 58534 Logos at the JPL Small-Body Database
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