Asteroids with Satellites Database--Johnston's Archive

(3671) Dionysus and S/1997 (3671) 1

compiled by Wm. Robert Johnston
last updated 25 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: NEA, Apollo (PHA)


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.197503781 AU
orbital period P: 3.257636697 yr (= 1189.8518040 d)
eccentricity e: 0.542416439
perihelion distance q: 1.005541605 AU
aphelion distance Q: 3.389465956 AU
inclination i: 13.5501872°
argument of perihelion ω: 204.192352°
ascending node Ω: 82.161864°
mean anomaly M: 62.9062118°
perihelion passage TP: 2013 Oct 27.08591
Epoch: 2014 May 23
data arc: 1984-2013 (456 obs.)
Earth MOID: 0.0184778 AU
Jupiter Tisserand invariant TJ: 3.429


orbital data, secondary:
semimajor axis as: 3.4 ± 0.6 km [P06b]
separation/primary radius as/rp:4.8 [P06b]
separation/Hill radius as/rH:0.030 [*D]
orbital period Ps: 1.156 ± 0.0004 d [P06b]
eccentricity es: 0.07 ± 0.03/0.07 [P06b]
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 16.4 [MPC]
slope parameter G: 0.15 [*A]
effective diameter dE: 1.46 ± 0.2 km [M11c]
geometric albedo: 0.179 ± 0.079 [M11c]
color index U-B: ?
color index B-V: 0.68 [P98a]
color index V-R:0.39 [P98a]
color index B-R:1.07 [P98a]
color index V-I:0.78 [P98a]
taxonomic type: Cb (SMASSII) [JPL]
mass m: 2.48x1012 kg [*D]
density ρ: 1.6 ± 0.65 g/cm3 [P06b]
Hill radius rH: 110 km [*D]

other data, primary:
diameter dp: 1.43 ± 0.2 km [*D]
rotation period RPp: 2.705 ± 0.000 h [P06b]
amplitude in mag., rotational ΔM: ?
pole direction : ? ; ?


other data, secondary:
diameter ds: 0.29 ± 0.05 km [*D]
diameter ratio ds/dp: 0.2 ± 0.02 [P06b]
component mag. difference ΔM: 3.5 ± 0.2 [*D]
rotation period RPs: ?

-- (3671) Dionysus and S/1997 (3671) 1 --discovery and notes:

Primary discovered 1984 May 27 from Palomar Observatory, California, USA by C. S. Shoemaker and E. M. Shoemaker. Alternate designation(s): 1984 KD . Permanent number assigned 1987 Aug 09.

Named 1988 Feb 02 for the mythological Greek god of wine [MPC12808].

Companion discovered 1997 May 30 by S. Mottola, G. Hahn, P. Pravec, and L. Sarounova using LC observations from European Southern Observatory, La Silla. Announced 1997 Jun 10 [I6680]. Provisional designation S/1997 (3671) 1.

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--Links to ADS abstracts:


© 2001-2008, 2014 by Wm. Robert Johnston.
Last modified 25 May 2014.
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