Asteroids with Satellites Database--Johnston's Archive

(18527) 1996 VJ30

compiled by Wm. Robert Johnston
last updated 30 December 2018

--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


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.3991578652 AU
orbital period P: 3.71610724 yr
(= 1357.3338042 d)
eccentricity e: 0.143552493
perihelion distance q: 2.054752773 AU
aphelion distance Q: 2.743562957 AU
inclination i: 5.4545662°
argument of perihelion ω: 104.780076°
ascending node Ω: 243.4416°
mean anomaly M: 69.026484°
perihelion passage TP: 2018 Aug 09.744500
Epoch: 2019 Apr 27
data arc: 1951-2018 (1602 obs.)
Earth MOID: 1.05575 AU
Jupiter Tisserand invariant TJ: 3.507


orbital data, secondary:
semimajor axis as: 6 km [*E]
separation/primary radius as/rp:3.8 [*E]
separation/Hill radius as/rH:0.010 [*E]
orbital period Ps: 0.7946 ± 0.0004 d [B18h]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 13.9 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 3.35 ± 0.48 km [M**]
geometric albedo: 0.572 ± 0.147 [M**]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 600 km [*E]

other data, primary:
diameter dp: 3.19 km [*D]
rotation period RPp: 3.3529 ± 0.00009 h [B18h]
amplitude in mag., rotational ΔM: 0.13 [B18h]
amplitude in mag., mutual events ΔM:0.155 ±0.055 [B18h]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 1.02 km [*D]
axial ratios a/b, b/c:1.4;? [B18h]
diameter ratio ds/dp: 0.32 ± 0.02 [B18h]
component mag. difference ΔM: 2.5 ± 0.2 [*D]
rotation period RPs: 3.3529 ± 0.00009 h [B18h]

-- (18527) 1996 VJ30 --discovery and notes:

Primary discovered 1996 Nov 07 from Kushiro, Hokkaido, Japan by S. Ueda and H. Kaneda. Alternate designation(s): 1992 SV26. Linked to prediscovery observations from 1951 Aug 10. Permanent number assigned 2000 Nov 11.

Companion discovered 2018 Sep 16 by V. Benishek, P. Pravec, K. Hornoch, P. Kusnirak, J. Oey, R. Groom, V. Chiorny, and N. Gartonyuk using lightcurve observations from Sopot Observatory, Serbia; Ondrejov Observatory, Czech Republic; Blue Mountains Observatory, Leura, New South Wales, Australia; Darling Range Observatory, Perth, Western Australia; Kharkiv Observatory, Chuguev, Ukraine; Crimean Astrophysical Observatory. Announced 2018 Oct 14 [B18h].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2018 by Wm. Robert Johnston.
Last modified 30 December 2018.
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