Asteroids with Satellites Database--Johnston's Archive

(17365) 1978 VF11

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: Jupiter trojan, L5


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 5.26758981 AU
orbital period P: 12.08999510 yr
(= 4415.87071 d)
eccentricity e: 0.07894338
perihelion distance q: 4.85174847 AU
aphelion distance Q: 5.68343114 AU
inclination i: 11.646515°
argument of perihelion ω: 118.026650°
ascending node Ω: 252.150094°
mean anomaly M: 44.035817°
perihelion passage TP: 2012 Nov 28.8431
Epoch: 2014 May 23
data arc: 1954-2014 (680 obs.)
Earth MOID: 3.8706 AU
Jupiter Tisserand invariant TJ: 2.953


orbital data, secondary:
semimajor axis as: 43 km [*E]
separation/primary radius as/rp:2.6 [*E]
separation/Hill radius as/rH:0.0038 [*D]
orbital period Ps: 0.528 ± 0.0008 d [M07a]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 10.3 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 42.62 ± 0.8 km [M11b]
geometric albedo: 0.074 ± 0.011 [M11b]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: 2.26x1016 kg [*D]
density ρ: 0.78 ± 0.07 g/cm3[M07a]
Hill radius rH: 11000 km [*D]

other data, primary:
diameter dp: 32.6 ± 0.61 km [*D]
rotation period RPp: 12.672 ± 0.019 h [M07a]
amplitude in mag., rotational ΔM: 0.98 ± 0.02 [M07a]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 27.5 ± 2.25 km [*D]
diameter ratio ds/dp: 0.843 ± 0.067 [M07a]
component mag. difference ΔM: 0.4 [* D]
rotation period RPs: ?

-- (17365) 1978 VF11 --discovery and notes:

Primary discovered 1978 Nov 07 from Palomar Observatory, California, USA by E. F. Helin and S. J. Bus. Alternate designation(s): 1998 MM49, 1999 RE121. Linked to prediscovery observations from 1954 Nov 23. Permanent number assigned 2000 Oct 13.

Companion discovered 2005 Apr 09 using lightcurve observations. Announced 2007 Jun 01.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2009-2012, 2014 by Wm. Robert Johnston.
Last modified 21 September 2014.
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