Asteroids with Satellites Database--Johnston's Archive

(208996) 2003 AZ84

compiled by Wm. Robert Johnston
last updated 10 May 2014
under construction--testing upgrades!

--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: 39.6805 AU
orbital period P: 249.962 yr (= 91298.6 d)
eccentricity e: 0.174435
perihelion distance q: 32.7588 AU
aphelion distance Q: 46.6022 AU
inclination i: 13.54750°
argument of perihelion ω: 14.000°
ascending node Ω: 251.95284°
mean anomaly M: 226.659°
perihelion passage TP: 2106 Dec 23
Epoch: 2014 May 23
data arc: 1996-2014 (103 obs.)
Earth MOID: 31.7444 AU
Jupiter Tisserand invariant TJ: 5.418
Neptune Tisserand invariant TN:2.96 [*D]


orbital data, secondary:
semimajor axis as: 7200 ± 300 km (separation) [B07d]
separation/primary radius as/rp:20 [*E]
separation/Hill radius as/rH:0.0046 [*E]
orbital period Ps: 12 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 3.8 [MPC]
3.74 ± 0.08 [M12a]
slope parameter G: 0.15 [*A]
effective diameter dE: 727 ± 61.9/66.5 km [M12a]
geometric albedo: 0.107 ± 0.023/0.016 [M12a]
color index U-B: ?
color index B-V: 0.65 [F04a]
color index V-R:0.39± 0.03 [F04a]
color index B-R:1.04± 0.03 [F04a]
color index V-I:0.75± 0.03 [F04a]
color index R-J:0.82 [*D]
color index V-J:1.21± 0.05 [D09c]
color index J-H:0.31 [D09c]
color index V-H:1.52± 0.05 [D09c]
taxonomic type: ?
mass m: ?
density ρ: 1 g/cm3 [*A]
Hill radius rH: 1600000 km [*E]

other data, primary:
diameter dp: 723 ± 64 km [*D]
rotation period RPp: 13.44 ± 0.1 h [S03a]
amplitude in mag., rotational ΔM: ?
pole direction : ? ; ?


other data, secondary:
diameter ds: 72 ± 12 km [*D]
diameter ratio ds/dp: 0.1 ± 0.014 [B07d]
component mag. difference ΔM: 5.0 ± 0.3 [I8812]
rotation period RPs: ?

-- (208996) 2003 AZ84 --discovery and notes:

Primary discovered 2003 Jan 13 from Palomar Observatory, California, USA by C. A. Trujillo and M. E. Brown. . Linked to prediscovery observations from 1996 Mar 19. Permanent number assigned 2009 Mar 11.

Companion discovered 2005 Dec 02 by M. E. Brown and T.-A. Suer using HST observations from Hubble Space Telescope. Announced 2007 Feb 22 [B07d].

--Links, more technical:

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--Links to ADS abstracts:


© 2007-2009, 2014 by Wm. Robert Johnston.
Last modified 10 May 2014.
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