Asteroids with Satellites Database--Johnston's Archive

(13123) Tyson

compiled by Wm. Robert Johnston
last updated 27 November 2015

--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: 2.360486365 AU
orbital period P: 3.626621603 yr
(= 1324.648558 d)
eccentricity e: 0.270703491
perihelion distance q: 1.72149447 AU
aphelion distance Q: 2.999478265 AU
inclination i: 23.2830128°
argument of perihelion ω: 251.932319°
ascending node Ω: 68.835359°
mean anomaly M: 221.192216°
perihelion passage TP: 2016 Nov 18.754253
Epoch: 2015 Jun 27
data arc: 1953-2015 (1030 obs.)
Earth MOID: 0.83587 AU
Jupiter Tisserand invariant TJ: 3.396


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

other data, system (combined):
absolute mag. H: 12.3 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 10.87 ± 2.26 km [M11b]
geometric albedo: 0.197 ± 0.083 [M11b]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 1500 km [*E]

other data, primary:
diameter dp: 10.87 ± 2.26 km [M11b]
rotation period RPp: 3.3303 ± 0.0002 h [O15*]
amplitude in mag., rotational ΔM: 0.2 [O15*]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: ?
diameter ratio ds/dp: ?
component mag. difference ΔM: ?
rotation period RPs: 3.862 ± 0.002 h [O15*]

-- (13123) Tyson --discovery and notes:

Primary discovered 1994 May 16 from Palomar Observatory, California, USA by C. S. Shoemaker and D. H. Levy. Alternate designation(s): 1994 KA, 1995 YO2. Linked to prediscovery observations from 1953 Feb 14. Permanent number assigned -.

Named - for Neil deGrasse Tyson (1958-).

Companion discovered 2015 Feb using lightcurve observations. Announced 2015 Feb.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2015 by Wm. Robert Johnston.
Last modified 27 November 2015.
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