Asteroids with Satellites Database--Johnston's Archive

(38628) Huya

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: TNO, plutino


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 39.4127 AU
orbital period P: 247.436 yr
(= 90376.0 d)
eccentricity e: 0.276051
perihelion distance q: 28.53278 AU
aphelion distance Q: 50.2927 AU
inclination i: 15.467957°
argument of perihelion ω: 67.5252°
ascending node Ω: 169.26643°
mean anomaly M: 359.1610°
perihelion passage TP: 2014 Dec 19.6
Epoch: 2014 May 23
data arc: 1996-2012 (149 obs.)
Earth MOID: 27.5538 AU
Jupiter Tisserand invariant TJ: 5.231
Neptune Tisserand invariant TN:2.88 [*D]


orbital data, secondary:
semimajor axis as: 1740 ± 80 km (separation) [G12b]
separation/primary radius as/rp:8.6 [*E]
separation/Hill radius as/rH:0.0019 [*E]
orbital period Ps: 3.2 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 4.9 [MPC]
5.04 ± 0.03 [F13a]
slope parameter G: (0.15) [*A]
effective diameter dE: 458 ± 9.2/9.2 km [F13a]
geometric albedo: 0.083 ± 0.004/0.004 [F13a]
color index U-B: ?
color index B-V: 0.95 [M12a]
color index V-R:0.57 ± 0.09 [M12a]
color index B-R:1.54 ± 0.06 [M12a]
color index V-I:1.18 [M12a]
color index R-J:1.4 [*D]
color index V-J:1.97 ± 0.05 [M03c]
taxonomic type: ?
mass m: ?
density ρ: >1.43 g/cm3[T14a]
Hill radius rH: 910000 km [*E]

other data, primary:
diameter dp: 406 ± 16 km [F13a]
rotation period RPp: 5.28 h [T14a]
amplitude in mag., rotational ΔM: 0.02 ± 0.01 [T14a]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 213 ± 30 km [F13a]
diameter ratio ds/dp: 0.525 [N12a]
component mag. difference ΔM: 1.4 [I9253]
rotation period RPs: ?

-- (38628) Huya --discovery and notes:

Primary discovered 2000 Mar 10 from Mérida, Venezuela by I. R. Ferrin. Alternate designation(s): 2000 EB173 . Linked to prediscovery observations from 1996 Apr 09. Permanent number assigned 2002 Mar 28.

Named 2003 May 01 for the mythological Wayuu god of rain/winter [MPC48397].

Companion discovered 2012 May 06 by K. S. Noll, W. M. Grundy, H. Schlichting, R. Murray-Clay, and S. D. Benecchi using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2012 Jul 12 [N12a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2012, 2014 by Wm. Robert Johnston.
Last modified 21 September 2014.
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