Asteroids with Satellites Database--Johnston's Archive

(7615) 1996 TA11

compiled by Wm. Robert Johnston
last updated 13 December 2022

--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: 2.4076026334 AU
orbital period P: 3.735815475 yr
(= 1364.5066023 d)
eccentricity e: 0.211301099
perihelion distance q: 1.898873551 AU
aphelion distance Q: 2.9163317154 AU
inclination i: 3.5548803°
argument of perihelion ω: 235.154162°
ascending node Ω: 106.093987°
mean anomaly M: 52.4625851°
perihelion passage TP: 2022 Aug 10.151268
Epoch: 2023 Feb 25
data arc: 1981-2022 (2871 obs.)
Earth MOID: 0.891551 AU
Jupiter Tisserand invariant TJ: 3.488

orbital data, secondary:
semimajor axis as: 7.1 km [*E]
separation/primary radius as/rp:3.8 [*E]
separation/Hill radius as/rH:0.013 [*E]
orbital period Ps: 0.7871 ± 0.0004 d [C22b]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 14.1 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 3.91 ± 0.21 km [M**]
geometric albedo: 0.46 ± 0.124 [M**]
color index U-B: ?
color index B-V: ?
color index J-H:0.162 ± 0.192 [LMP]
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 560 km [*E]

other data, primary:
diameter dp: 3.77 ± 0.20 km [*D]
rotation period RPp: 3.3195 ± 0.0002 h [C22b]
amplitude in mag., rotational ΔM: 0.14 [C22b]
amplitude in mag., mutual events ΔM:0.105 ±0.025 [C22b]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: >1.05 ± 0.06 km [*D]
diameter ratio ds/dp: >0.28 [C22b]
component mag. difference ΔM: <2.8 [*D]
rotation period RPs: ?

-- (7615) 1996 TA11 --discovery and notes:

Primary discovered 1996 Oct 09 from Kushiro, Hokkaido, Japan by S. Ueda and H. Kaneda. Alternate designation(s): 1981 SG7, 1991 EN1, 1992 PL5. Linked to prediscovery observations from 1981 Sep 28.

Companion discovered 2022 Sep 28 by M. Conjat, D. Augustin, F. Manzini, R. Nicollerat, A. Wuensche, and R. Behrend using lightcurve observations from Nice Observatory, France; Deep Sky Chile Observatory, Chile; Stazione Astronomica di Sozzago, Italy; Valentines Observatory, Bex, Switzerland; Observatoire des Baronnies Provencales, France. Announced 2022 Dec 10 [C22b].

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--Links to ADS abstracts:

© 2022 by Wm. Robert Johnston.
Last modified 13 December 2022.
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