Asteroids with Satellites Database--Johnston's Archive

2008 DG17

compiled by Wm. Robert Johnston
last updated 20 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: NEA, Apollo


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 1.837644959 AU
orbital period P: 2.491154217 yr
(= 909.8940778 d)
eccentricity e: 0.44947160
perihelion distance q: 1.01167574 AU
aphelion distance Q: 2.663614175 AU
inclination i: 41.111473°
argument of perihelion ω: 214.983904°
ascending node Ω: 324.4053285°
mean anomaly M: 170.136685°
perihelion passage TP: 2013 Mar 18.98232
Epoch: 2014 May 23
data arc: 2008-2013 (177 obs.)
Earth MOID: 0.0807832 AU
Jupiter Tisserand invariant TJ: 3.631


orbital data, secondary:
semimajor axis as: ?
orbital period Ps: ?
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 19.7 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 0.38 km [*E]
geometric albedo: (0.16 ) [*A]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 30 km [*E]

other data, primary:
diameter dp: 0.38 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: ?
diameter ratio ds/dp: ?
component mag. difference ΔM: ?
rotation period RPs: ?

-- 2008 DG17 --discovery and notes:

Primary discovered 2008 Feb 29 from Catalina Station, Arizona, USA by Catalina Sky Survey.

Companion discovered 2013 Feb using radar observations. Announced 2013 Feb .

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2013, 2014 by Wm. Robert Johnston.
Last modified 20 September 2014.
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