Asteroids with Satellites Database--Johnston's Archive

(66063) 1998 RO1

compiled by Wm. Robert Johnston
last updated 11 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, Aten


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 0.990918301 AU
orbital period P: 0.986427058 yr (= 360.2924828 d)
eccentricity e: 0.720119477
perihelion distance q: 0.277338733 AU
aphelion distance Q: 1.704497870 AU
inclination i: 22.6775462°
argument of perihelion ω: 151.1200448°
ascending node Ω: 351.8797800°
mean anomaly M: 229.970747°
perihelion passage TP: 2014 Sep 30.13489
Epoch: 2014 May 23
data arc: 1996-2010 (1302 obs.)
Earth MOID: 0.091696 AU
Jupiter Tisserand invariant TJ: 5.81


orbital data, secondary:
binary dynamical type:A [P07f]
semimajor axis as: 1.2 ± 0.3 km [S09a]
separation/primary radius as/rp:3.0 [*D]
separation/Hill radius as/rH:0.069 [*D]
orbital period Ps: 0.6058 ± 0.0008 d [P06b]
eccentricity es: 0.05 ± 0.06 [S09a]
normalized ang. mom. αL: 1.32 [P07f]

other data, system (combined):
absolute mag. H: 18.1 [MPC]
slope parameter G: 0.15 [*A]
effective diameter dE: 0.89 ± 0.17 km [*D]
geometric albedo: 0.14 ± 0.06 [P06b]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: 4.47x1011 kg [*D]
density ρ: 1.5 ± 1.15 g/cm3 [S09a]
Hill radius rH: 17 km [*D]

other data, primary:
diameter dp: 0.8 ± 0.15 km [P06b]
rotation period RPp: 2.492 ± 0.000 h [P06b]
amplitude in mag., rotational ΔM: 0.13 [*OOc]
pole direction : ? ; ?


other data, secondary:
diameter ds: 0.38 ± 0.08 km [*D]
axial ratios a/b, b/c:1.5 (a/c);? [*S07a]
diameter ratio ds/dp: 0.48 ± 0.03 [P06b]
component mag. difference ΔM: ?
rotation period RPs: ?

-- (66063) 1998 RO1 --discovery and notes:

Primary discovered 1998 Sep 14 from Socorro, New Mexico, USA by LINEAR. Alternate designation(s): 1999 SN5. Linked to prediscovery observations from 1996 Sep 12. Permanent number assigned 2003 Sep 10.

Companion discovered 2002 Sep 13 using LC observations. Announced 2002 Oct 21.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2002-2009, 2014 by Wm. Robert Johnston.
Last modified 11 May 2014.
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