Asteroids with Satellites Database--Johnston's Archive

(4786) Tatianina

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: 2.358201605 AU
orbital period P: 3.621425858 yr
(= 1322.725795 d)
eccentricity e: 0.193657533
perihelion distance q: 1.90151810 AU
aphelion distance Q: 2.814885110 AU
inclination i: 7.2571511°
argument of perihelion ω: 118.450716°
ascending node Ω: 115.799641°
mean anomaly M: 62.568403°
perihelion passage TP: 2013 Oct 05.10877
Epoch: 2014 May 23
data arc: 1970-2013 (1101 obs.)
Earth MOID: 0.902658 AU
Jupiter Tisserand invariant TJ: 3.517

orbital data, secondary:
binary dynamical type:A [P07f]
semimajor axis as: 6.6 km [*E]
separation/primary radius as/rp:4.1 [*E]
separation/Hill radius as/rH:0.014 [*E]
orbital period Ps: 0.9029 ± 0.0004 d [P06d]
eccentricity es: ?
normalized ang. mom. αL: 0.94 [P07f]

other data, system (combined):
absolute mag. H: 13.2 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 3.28 ± 0.2 km [M11b]
geometric albedo: 0.514 ± 0.159 [M11b]
color index U-B: ?
color index B-V: ?
taxonomic type: Xc (SMASSII) [JPL]
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 480 km [*E]

other data, primary:
diameter dp: 3.22 ± 0.2 km [*D]
rotation period RPp: 2.9227 ± 0.0001 h [P06d]
amplitude in mag., rotational ΔM: 0.20 [P06d]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 0.61 ± 0.1 km [*D]
diameter ratio ds/dp: 0.19 ± 0.03 [P06d]
component mag. difference ΔM: 3.6 ± 0.3 [*D]
rotation period RPs: ?

-- (4786) Tatianina --discovery and notes:

Primary discovered 1985 Aug 13 from Nauchnyj, Crimea, Ukraine, USSR by N. S. Chernykh. Alternate designation(s): 1985 PE2, 1948 GA, 1970 KF, 1984 EV1, 1984 FM1. Linked to prediscovery observations from 1970 May 31. Permanent number assigned 1991 Apr 28.

Named 1996 Mar 05 for Tatiana Aleksandrovna Somova [MPC26762].

Companion discovered 2006 Mar 20 by D. Pray, P. Pravec, P. Kusnirak, S. Nudds, A. Galad, S. Gajdos, J. Vilagi, and R. Koff using lightcurve observations from Carbuncle Hill Observatory, Greene, Rhode Island, USA; Ondrejov Observatory, Czech Republic; Elginfield Observatory, University of Western Ontario, Ontario, Canada; Modra Observatory, Slovakia; Antelope Hills Observatory, Bennett, Colorado, USA. Announced 2006 Apr 11 [P06d].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2006-2008, 2014 by Wm. Robert Johnston.
Last modified 21 September 2014.
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