Asteroids with Satellites Database--Johnston's Archive

1994 CJ1

compiled by Wm. Robert Johnston
last updated 16 November 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: NEA, Apollo (PHA)

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 1.4904278855 AU
orbital period P: 1.81956029421078 yr
(= 664.6069494 d)
eccentricity e: 0.325346541
perihelion distance q: 1.005522329 AU
aphelion distance Q: 1.975333442 AU
inclination i: 2.306565°
argument of perihelion ω: 65.25745°
ascending node Ω: 172.07856°
mean anomaly M: 106.0232018°
perihelion passage TP: 2014 May 27.267343
Epoch: 2014 Dec 09
data arc: 1994-2014 (169 obs.)
Earth MOID: 0.0320333 AU
Jupiter Tisserand invariant TJ: 4.503

orbital data, secondary:
semimajor axis as: 0.525 km (separation) [T14b]
separation/primary radius as/rp:7 [T14b]
separation/Hill radius as/rH:0.036 [*E]
orbital period Ps: 1.25 d [T14b]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 21.3 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: <0.21 km [T14b]
geometric albedo: []
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 15 km [*E]

other data, primary:
diameter dp: <0.15 km [T14b]
rotation period RPp: 30 h [W14e]
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: <0.15 km [T14b]
diameter ratio ds/dp: 1 [B14f]
component mag. difference ΔM: 0.0 [*D]
rotation period RPs: ?

-- 1994 CJ1 --discovery and notes:

Primary discovered 1994 Feb 10 from Steward Observatory, Kitt Peak, Arizona, USA by Spacewatch.

Companion discovered 2014 Jun using radar observations from Arecibo Observatory, Puerto Rico. Announced 2014 Jul.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2014 by Wm. Robert Johnston.
Last modified 16 November 2014.
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