Asteroids with Satellites Database--Johnston's Archive

(2006) Polonskaya

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: main belt asteroid

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.323905449 AU
orbital period P: 3.542712288 yr
(= 1293.9756630 d)
eccentricity e: 0.193374097
perihelion distance q: 1.87452233 AU
aphelion distance Q: 2.773288566 AU
inclination i: 4.9188122°
argument of perihelion ω: 24.400049°
ascending node Ω: 0.988172°
mean anomaly M: 160.449899°
perihelion passage TP: 2012 Oct 23.28259
Epoch: 2014 May 23
data arc: 1950-2014 (1209 obs.)
Earth MOID: 0.878115 AU
Jupiter Tisserand invariant TJ: 3.546

orbital data, secondary:
binary dynamical type:A [P07f]
semimajor axis as: 8.5 km [*E]
separation/primary radius as/rp:3.8 [*E]
separation/Hill radius as/rH:0.013 [*E]
orbital period Ps: 0.7979 ± 0.0008 d [P05c]
eccentricity es: ?
normalized ang. mom. αL: 0.87 [P07f]

other data, system (combined):
absolute mag. H: 12.9 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 4.62 ± 0.16 km [M11b]
geometric albedo: 0.354 ± 0.096 [M11b]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 660 km [*E]

other data, primary:
diameter dp: 4.51 ± 0.16 km [*D]
rotation period RPp: 3.118 ± 0.000 h [P05c]
amplitude in mag., rotational ΔM: 0.08 [P05c]
amplitude in mag., mutual events ΔM:0.06 [P05c]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 0.99 km [*D]
diameter ratio ds/dp: >0.22 [P05c]
component mag. difference ΔM: <3.3 [*D]
rotation period RPs: 6.6571 ± 0.0002 h [P09d]

-- (2006) Polonskaya --discovery and notes:

Primary discovered 1973 Sep 22 from Nauchnyj, Crimea, Ukraine, USSR by N. S. Chernykh. Alternate designation(s): 1973 SB3, 1941 SD, 1948 QH, 1966 VC. Linked to prediscovery observations from 1950 Apr 17. Permanent number assigned -.

Named - for Elena Ivanovna Kazimirchak-Polonskaya [MPC4481].

Companion discovered 2005 Nov 01 by D. Pray, P. Pravec, P. Kusnirak, W. Cooney, J. Gross, and D. Terrell using lightcurve observations from Greene, Rhode Island, USA; Ondrejov Observatory, Czech Republic; Sonoita Research Observatory, Sonoita, Arizona, USA. Announced 2005 Nov 10 [P05c].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2005-2008, 2014 by Wm. Robert Johnston.
Last modified 21 September 2014.
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