Asteroids with Satellites Database--Johnston's Archive

(2691) Sersic

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: 2.244304321 AU
orbital period P: 3.362256337 yr
(= 1228.0641270 d)
eccentricity e: 0.112147656
perihelion distance q: 1.99261085 AU
aphelion distance Q: 2.495997791 AU
inclination i: 3.5944525°
argument of perihelion ω: 277.198200°
ascending node Ω: 319.897709°
mean anomaly M: 320.859247°
perihelion passage TP: 2014 Oct 03.5204
Epoch: 2014 May 23
data arc: 1950-2014 (1461 obs.)
Earth MOID: 0.984655 AU
Jupiter Tisserand invariant TJ: 3.621

orbital data, secondary:
semimajor axis as: 12 km [*E]
separation/primary radius as/rp:4.8 [*E]
separation/Hill radius as/rH:0.015 [*E]
orbital period Ps: 1.117 ± 0.0004 d [O11a]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 13.1 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 5.44 ± 0.12 km [M11b]
geometric albedo: 0.261 ± 0.062 [M11b]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 790 km [*E]

other data, primary:
diameter dp: 5 ± 0.11 km [*D]
rotation period RPp: 3.8811 ± 0.0003 h [O11a]
amplitude in mag., rotational ΔM: 0.21 [O11a]
amplitude in mag., mutual events ΔM:0.45 [O11a]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 2.15 ± 0.11 km [*D]
diameter ratio ds/dp: >0.43 ± 0.02 [O11a]
component mag. difference ΔM: 1.8 ± 0.1 [*D]
rotation period RPs: ?

-- (2691) Sersic --discovery and notes:

Primary discovered 1974 May 18 from Felix Aguilar Observatory, El Leoncito, Argentina by ?. Alternate designation(s): 1974 KB, 1938 UU, 1978 QR1. Linked to prediscovery observations from 1950 Mar 21. Permanent number assigned 1982.

Named 1989 Feb 20 for Jose Luis Sersic (1933-1993) [MPC14207].

Companion discovered 2011 Jun 03 by J. Oey, P. Pravec, P. Kusnirak, N. Morales, A. Thirouin, J. Pollock, D. E. Reichart, K. M. Ivarsen, J. B. Haislip, and A. LaCluyze using lightcurve observations from Leura, New South Wales, Australia; Ondrejov Observatory, Czech Republic; Instituto de Astrofisica de Andalucia; Appalachian State University, North Carolina, USA; University of North Carolina at Chapel Hill, North Carolina, USA. Announced 2011 Jul 16 [O11a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2011-2012, 2014 by Wm. Robert Johnston.
Last modified 21 September 2014.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.