Asteroids with Satellites Database--Johnston's Archive

(5905) Johnson

compiled by Wm. Robert Johnston
last updated 21 September 2014

--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: main belt asteroid, Hungaria


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 1.910207673 AU
orbital period P: 2.640152907 yr
(= 964.3158492 d)
eccentricity e: 0.071733727
perihelion distance q: 1.77318136 AU
aphelion distance Q: 2.047233990 AU
inclination i: 27.5231745°
argument of perihelion ω: 208.606565°
ascending node Ω: 141.284848°
mean anomaly M: 11.721640°
perihelion passage TP: 2014 Apr 21.60176
Epoch: 2014 May 23
data arc: 1989-2013 (1274 obs.)
Earth MOID: 0.772264 AU
Jupiter Tisserand invariant TJ: 3.796


orbital data, secondary:
binary dynamical type:A [P07f]
semimajor axis as: 9.3 km [*E]
separation/primary radius as/rp:4.2 [*E]
separation/Hill radius as/rH:0.015 [*E]
orbital period Ps: 0.9077 ± 0.00002 d [W05b]
eccentricity es: ?
normalized ang. mom. αL: 0.9 [P07f]

other data, system (combined):
absolute mag. H: 14 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 4.79 ± 0.07 km [M11b]
geometric albedo: 0.194 ± 0.028 [M11b]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 630 km [*E]

other data, primary:
diameter dp: 4.45 ± 0.07 km [W05b]
rotation period RPp: 3.7824 ± 0.0002 h [W05b]
amplitude in mag., rotational ΔM: 0.11 [W05b]
amplitude in mag., mutual events ΔM:0.165 ±0.015 [W05f]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 1.78 ± 0.18 km [*D]
diameter ratio ds/dp: 0.40 ± 0.04 [W05b]
component mag. difference ΔM: 2.0 ± 0.2 [*D]
rotation period RPs: ?

-- (5905) Johnson --discovery and notes:

Primary discovered 1989 Feb 11 from Palomar Observatory, California, USA by E. F. Helin. Alternate designation(s): 1989 CJ1 . Permanent number assigned 1994 Jun 23.

Named 1996 May 03 for Lindley N. Johnson [MPC27128].

Companion discovered 2005 Apr 01 by B. Warner, P. Pravec, P. Kusnirak, D. Pray, A. Galad, S. Gajdos, P. Brown, and Z. Krzeminski using lightcurve observations from Colorado Springs, Colorado, USA; Ondrejov Observatory, Czech Republic; Conventry, Rhode Island, USA; Modra Observatory, Slovakia; University of Western Ontario, Ontario, Canada. Announced 2005 Apr 13 [W05f].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2005-2009, 2014 by Wm. Robert Johnston.
Last modified 21 September 2014.
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