Asteroids with Satellites Database--Johnston's Archive

(58534) Logos and Zoe

compiled by Wm. Robert Johnston
last updated 24 May 2014
under construction--testing upgrades!

--Orbital and physical data--

(See this page for definitions of quantities; source codes in brackets, see this link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)

dynamical type, primary: TNO, Cubewano


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 45.443 AU
orbital period P: 306.347 yr (= 111893.1 d)
eccentricity e: 0.12372
perihelion distance q: 39.8212 AU
aphelion distance Q: 51.065 AU
inclination i: 2.89533°
argument of perihelion ω: 337.780°
ascending node Ω: 132.5057°
mean anomaly M: 55.772°
perihelion passage TP: 1966 Dec 06
Epoch: 2014 May 23
data arc: 1997-2012 (61 obs.)
Earth MOID: 38.8378 AU
Jupiter Tisserand invariant TJ: 5.972
Neptune Tisserand invariant TN:3.10 [*D]


orbital data, secondary:
semimajor axis as: 8217 ± 42 km [G11a]
separation/primary radius as/rp:200 [*D]
separation/Hill radius as/rH:0.032 [*D]
orbital period Ps: 309.87 ± 0.22 d [G11a]
eccentricity es: 0.5463 ± 0.0079 [G11a]
inclination is:95.43°± 0.47 [G11a]
ascending node Ωs:16.07°± 0.34 [G11a]
argument of pericenter ωs:223.8°± 0.76 [G11a]
mean anomaly M:259.47°± 0.66 [G11a]
Epoch:2002 Nov 21.5
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 6.7 [MPC]
6.42 [JPL]
slope parameter G: 0.15 [*A]
effective diameter dE: 106 km [*D]
geometric albedo: 0.195 ± 0.085/0.085 [G11a]
color index U-B: ?
color index B-V: 0.99 [B05b]
color index V-R:0.73± 0.06 [B05b]
color index B-R:1.72 [B05b]
color index V-I:1.29± 0.03 [B05b]
color index R-J:1.11 [*D]
color index V-J:1.84± 0.37 [B05b]
taxonomic type: ? RR (BBRB) [*B05c]
mass m: 4.58x1017 ± 6.9x1015 kg [G11a]
density ρ: 1 ± 1/0.5 g/cm3 [G11a]
Hill radius rH: 250000 km [*D]

other data, primary:
diameter dp: 82 ± 18/18 km [G11a]
color index V-I:1.05± 0.08 [B08d]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction : ? ; ?


other data, secondary:
diameter ds: 67 km [*D]
diameter ratio ds/dp: 0.766 ± 0.021 [S06c]
component mag. difference ΔM: ?
color index V-I:1.09± 0.18 [B08d]
rotation period RPs: ?

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

Primary discovered 1997 Feb 04 from Mauna Kea Observatory, Hawaii, USA by ?. Alternate designation(s): 1997 CQ29 . Permanent number assigned 2003 Jun 14.

Named 2006 Jun 13 for the mythological Gnostic deity [MPC56962].

Companion discovered 2001 Nov 17 by K. S. Noll, D. C. Stephens, W. M. Grundy, J. Spencer, R. Millis, M. Buie, D. Cruikshank, S. Tegler, and W. Romanishin using HST observations from Hubble Space Telescope. Announced 2002 Feb 11 [I7824]. Provisional designation S/2002 (1997 CQ29) 1. Permanent designation I Zoe, assigned 2006 Jun 13; named for the mythological gnostic deity [MPC56962].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2002-2012, 2014 by Wm. Robert Johnston.
Last modified 24 May 2014.
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