Asteroids with Satellites Database--Johnston's Archive

(47171) 1999 TC36

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: 39.4715 AU
orbital period P: 247.990 yr
(= 90578.3 d)
eccentricity e: 0.225902
perihelion distance q: 30.55480 AU
aphelion distance Q: 48.3882 AU
inclination i: 8.410430°
argument of perihelion ω: 295.4575°
ascending node Ω: 97.18500°
mean anomaly M: 358.2871°
perihelion passage TP: 2015 Jul 27
Epoch: 2014 May 23
data arc: 1974-2013 (105 obs.)
Earth MOID: 29.5689 AU
Jupiter Tisserand invariant TJ: 5.44
Neptune Tisserand invariant TN:2.97 [*D]


orbital data, second component:
semimajor axis as: 7411 ± 12 km [B10a]
separation/primary radius as/rp:54 [*D]
separation/Hill radius as/rH:0.013 [*D]
orbital period Ps: 50.3 ± 0.001 d [B10a]
eccentricity es: ?
normalized ang. mom. αL: ?


orbital data, third component:
semimajor axis as: 867 ± 11 km [B10a]
separation/primary radius as/rp:6.4 [*D]
separation/Hill radius as/rH:0.0015 [*D]
orbital period Ps: 1.907 ± 0.0001 d [B10a]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 5 [MPC]
5.41 ± 0.1 [M12a]
slope parameter G: (0.15) [*A]
effective diameter dE: 393.1 ± 25.2/26.8 km [M12a]
geometric albedo: 0.079 ± 0.013/0.011 [M12a]
color index U-B: ?
color index B-V: 1.01 [B05b]
color index V-R:0.69 ± 0.03 [B05b]
color index B-R:1.7 [B05b]
color index V-I:1.32 [B05b]
color index R-J:1.63 [*D]
color index V-J:2.32 ± 0.07 [M03c]
color index J-H:0.42 [*D]
color index V-H:2.74 ± 0.03 [B05b]
taxonomic type: RR (G-mode) [B05b]
mass m: 1.28x1019 ± 6x1016 kg [B10a]
density ρ: 0.64 ± 0.15/0.11 g/cm3[M12a]
Hill radius rH: 590000 km [*D]

other data, primary:
diameter dp: 272 ± 17/19 km [M12a]
color index V-I:1.19 ± 0.01 [B08d]
rotation period RPp: 45.763 ± 0.002 h [B10a]
amplitude in mag., rotational ΔM: 0.06 [T14a]
pole direction Β, λ: ? , ?


other data, second component:
diameter ds: 132 ± 8/9 km [M12a]
diameter ratio ds/dp: 0.486 ± 0.1 [*D]
component mag. difference ΔM: 2.14 [M05b]
color index V-I:1.12± 0.03 [B08d]
rotation period RPs: ?


other data, third component:
diameter ds: 251 ± 16/17 km [M12a]
diameter ratio ds/dp: 0.927 ± 0.19 [*D]
component mag. difference ΔM: 0.2 [* D]
rotation period RPs: ?

-- (47171) 1999 TC36 --discovery and notes:

Primary discovered 1999 Oct 01 from Kitt Peak Observatory, Arizona, USA by E. P. Rubenstein and L.-G. Strolger. Linked to prediscovery observations from 1974 Jun 18. Permanent number assigned 2002 Sep 21.

Second component discovered 2001 Dec 08 by C. A. Trujillo and M. E. Brown using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2002 Jan 10 [T02b].

Third component discovered 2007 Oct using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2007 Oct .

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2002-2009, 2014 by Wm. Robert Johnston.
Last modified 21 September 2014.
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