Asteroids with Satellites Database--Johnston's Archive

(1016) Anitra

compiled by Wm. Robert Johnston
last updated 16 July 2017

--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: 2.2195521942 AU
orbital period P: yr
(= 1207.8040184 d)
eccentricity e: 0.127938491
perihelion distance q: 1.935586036 AU
aphelion distance Q: 2.50351835236 AU
inclination i: 6.0352086°
argument of perihelion ω: 53.320283°
ascending node Ω: 8.858843°
mean anomaly M: 176.008388°
perihelion passage TP: 2016 Jan 22.489895
Epoch: 2017 Sep 04
data arc: 1924-2017 (1851 obs.)
Earth MOID: 0.955056 AU
Jupiter Tisserand invariant TJ: 3.633


orbital data, secondary:
semimajor axis as: ?
orbital period Ps: ?
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 11.9 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 9.54 ± 0.08 km [M11b]
geometric albedo: 0.308 ± 0.048 [M11b]
color index U-B: ?
color index B-V: ?
taxonomic type: S (SMASSII) [JPL]
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 1400 km [*E]

other data, primary:
diameter dp: 9.54 ± 0.08 km [M11b]
rotation period RPp: 5.92951 h [JPL]
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: ?
diameter ratio ds/dp: ?
component mag. difference ΔM: ?
rotation period RPs: ?

-- (1016) Anitra --discovery and notes:

Primary discovered 1924 Jan 31 from Heidelberg, Germany by K. Reinmuth. Alternate designation(s): 1924 QG, 1929 TE1. Permanent number assigned 1924.

Companion discovered 2016 using lightcurve observations. Announced 2016 Jun.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2017 by Wm. Robert Johnston.
Last modified 16 July 2017.
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