Asteroids with Satellites Database--Johnston's Archive

(2577) Litva, second component, and S/2012 (2577) 1

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: Mars crossing asteroid, Hungaria

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 1.904439611 AU
orbital period P: 2.628203632 yr
(= 959.9513767 d)
eccentricity e: 0.137937478
perihelion distance q: 1.64174601 AU
aphelion distance Q: 2.167133209 AU
inclination i: 22.9078761°
argument of perihelion ω: 283.982228°
ascending node Ω: 182.609107°
mean anomaly M: 26.575021°
perihelion passage TP: 2014 Mar 13.13686
Epoch: 2014 May 23
data arc: 1934-2014 (864 obs.)
Earth MOID: 0.759072 AU
Jupiter Tisserand invariant TJ: 3.836

orbital data, second component:
binary dynamical type:A [L14c]
semimajor axis as: 21 km [*E]
separation/primary radius as/rp:11 [*E]
separation/Hill radius as/rH:0.041 [*E]
orbital period Ps: 1.495 ± 0.0004 d [W11a]
eccentricity es: ?
normalized ang. mom. αL: ?

orbital data, S/2012 (2577) 1:
binary dynamical type:A [L14c]
semimajor axis as: 378 km [M13b]
separation/primary radius as/rp:190 [*E]
separation/Hill radius as/rH:0.734 [*E]
orbital period Ps: 214 d [M13b]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 13.18 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 4.4 km [*D]
geometric albedo: 0.48 [*D]
color index U-B: 0.34 [JPL]
color index B-V: 0.787 [JPL]
taxonomic type: EU (Tholen) [JPL]
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 520 km [*E]

other data, primary:
diameter dp: 4 km [M13b]
rotation period RPp: 2.813 ± 0.000 h [W11a]
amplitude in mag., rotational ΔM: 0.24 ± 0.02 [W09c]
amplitude in mag., mutual events ΔM:0.14 ±0.01 [W09c]
pole direction Β, λ: ? , ?

other data, second component:
diameter ds: 1.4 km [M13b]
diameter ratio ds/dp: 0.35 ± 0.02 [W09b]
component mag. difference ΔM: 2.3 ± 0.1 [*D]
rotation period RPs: 5.6842 ± 0.0002 h [W09c]

other data, S/2012 (2577) 1:
diameter ds: 1.2 km [M13b]
diameter ratio ds/dp: 0.3 [M13b]
component mag. difference ΔM: 2.6 [* D]
rotation period RPs: ?

-- (2577) Litva --discovery and notes:

Primary discovered 1975 Mar 12 from Nauchnyj, Crimea, Ukraine, USSR by N. S. Chernykh. Alternate designation(s): 1975 EE3, 1934 VY, 1954 JD, 1976 SA2. Linked to prediscovery observations from 1934 Nov 03. Permanent number assigned 1982.

Named 1982 Dec 01 for Lithuania [MPC7472].

Second component discovered 2009 Feb 28 by B. D. Warner, P. Pravec, A. W. Harris, D. Higgins, C. Bembrick, and J. Brinsfield using lightcurve observations from Palmer Divide Observatory, Colorado Springs, Colorado, USA; Ondrejov Observatory, Czech Republic; Space Science Institute, La Canada, California, USA; Hunters Hill Observatory, Ngunnawal, ACT, Australia; Mt. Tarana Observatory, Bathurst, New South Wales, Australia; Via Capote Observatory, Thousand Oaks, California, USA. Announced 2009 Mar 11 [W09b].

Third component discovered 2012 Jun 22 by W. J. Merline, P. M. Tamblyn, B. D. Warner, P. Pravec, J. P. Tamblyn, C. Neyman, A. R. Conrad, W. M. Owen, B. Carry, J. D. Drummond, C. R. Chapman, B. L. Enke, W. M. Grundy, C. Veillet, S. B. Porter, C. Arcidiacono, J. C. Christou, D. D. Durda, A. W. Harris, H. A. Weaver, C. Dumas, D. Terrell, and P. Maley using adaptive optics telescope observations from W. M. Keck II Telescope, Mauna Kea, Hawaii, USA. Announced 2013 Dec 22 [M13b]. Provisional designation S/2012 (2577) 1.

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--Links to ADS abstracts:

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