(58534) Logos and Zoe

compiled by Wm. Robert Johnston
last updated 3 November 2012

Orbital elements and other data (Assumed or derived values in parenthesis, my estimates in italics and parenthesis. Source identifications in brackets, see this link for sources):

orbital data, primary (osculating elements) [JPL]:
semimajor axis a: 45.5107745800063 AU
orbital period P: 307.0291 y (=112144 d)
eccentricity e: 0.122545899694768
perihelion distance q: 39.9336157632936 AU
aphelion distance Q: 51.0879334 AU
inclination i: 2.89573423378638°
argument of perihelion omega: 339.207571066894°
ascending node OMEGA: 132.533954703798°
mean anomaly M: 43.7119670732022°
perihelion passage TP: 1967-10-20.4333137
Epoch: 30 JAN 2005
data arc: 1997-2003 (42 obs.)

orbital data, secondary:
semimajor axis a: 8,217 ± 42 km [G11b]
semimajor axis/primary radius a/Rp: (205)
orbital period P: 309.87 ± 0.22 d [G11b]
eccentricity e: 0.5463 ± 0.0079 [G11b]
inclination to ecliptic i: 95.43° ± 0.47° [G11b]
ascending node OMEGA: 16.07° ± 0.34° [G11b]
longitude of periapsis: 223.80° ± 0.76° [G11b]
mean longitude at epoch b>: 259.47° ± 0.66° [G11b]
Epoch: 21.5 NOV 2002 [G11b]

other data, primary:
diameter: 80 km [N04b]
absolute magnitude H: 6.42 [JPL]
rotation period: ?
amplitude delta M: ?
color index B-V: 0.99 ± 0.01 [B05c]
color index V-R: 0.73 ± 0.06 [B05c]
color index V-I: 1.29 ± 0.03 [B05c]
color index V-J: 2.20 ± 0.28 [I7824]
1.84 ± 0.37 [B05c]
slope parameter G: (0.15) [a]
geometric albedo: (0.45)
mass: (0.27 ± 0.03)x1018 kg [N04b]
density: (1 g/cm3) [a]
type: C [M03a]
BBFB type: RR [B05c]

other data, secondary:
diameter: 66 km [N04b]
diameter ratio Ds/Dp: (0.82)
component magnitude difference: (0.42)
mass: (4.579 ± 0.069)x1017 kg [G11b]
rotation period: ?

--(58534) Logos--discovery and notes:

Primary discovered 4 February 1997 by C. Trujillo, J. Chen, D. C. Jewitt, and J. Luu from Mauna Kea, Hawaii, USA. Alternate designation 1997 CQ29, named in June 2006.

Companion discovered 17 November 2001 from Hubble Space Telescope observations by K. Noll, D. Stephens, W. Grundy, J. Spencer, R. Millis, M. Buie, D. Cruikshank, S. Tegler, and W. Romanishin; announced 11 February 2002.

See more information and links at Asteroid/Comet Connection Catchall Catalog page

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2002-2006, 2012 by Wm. Robert Johnston.
Last modified 3 November 2012.
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