Asteroids with Satellites Database--Johnston's Archive

(136472) Makemake and S/2015 (136472) 1

compiled by Wm. Robert Johnston
last updated 28 April 2016

--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, Cubewano


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 45.7615 AU
orbital period P: 309.564 yr
(= 113070.5 d)
eccentricity e: 0.154015
perihelion distance q: 38.7136 AU
aphelion distance Q: 52.8095 AU
inclination i: 28.9945152°
argument of perihelion ω: 296.6074°
ascending node Ω: 79.5056°
mean anomaly M: 159.0192°
perihelion passage TP: 1879 Nov 01.5
Epoch: 2016 Jul 31
data arc: 1955-2016 (1226 obs.)
Earth MOID: 37.8152 AU
Jupiter Tisserand invariant TJ: 5.24
Neptune Tisserand invariant TN:2.78938898879957 [*D]


orbital data, secondary:
semimajor axis as: >21100 km [P16b]
separation/primary radius as/rp:29.5104895104895 [*D]
orbital period Ps: 12.4 d [P16b]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: -0.3 [MPC]
0.091 ± 0.015 [P16b]
slope parameter G: (0.15) [*A]
effective diameter dE: 1440 km [*D]
geometric albedo: 0.80 [B13a]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: 2.6x1021 ± 5x1020 kg [*D]
density ρ: 1.7 ± 0.3 g/cm3[O12a]
Hill radius rH: 4400000 km [*D]

other data, primary:
diameter dp: 1430 ± 14 km [B13a]
geometric albedo :0.8± 0.01[B13a]
rotation period RPp: 7.771 h [P16b]
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?
densityρp:1.7± 0.3 g/cm3 [O12a]


other data, secondary:
diameter ds: 175 ± 75 km [P16b]
diameter ratio ds/dp: 0.122 [P16b]
component mag. difference ΔM: 7.8 ± 0.04 [P16b]
geometric albedo :0.07± 0.05 [P16b]
rotation period RPs: ?

-- (136472) Makemake and S/2015 (136472) 1 --discovery and notes:

Primary discovered 2005 Mar 31 from Palomar Observatory, California, USA by M. E. Brown, C. A. Trujillo, and D. L. Rabinowitz. Alternate designation(s): 2005 FY9 . Linked to prediscovery observations from 1955 Jan 29. Permanent number assigned 2006 Sep 07.

Named 2008 Jul 18 for the Pacific mythological god of fertility.

Companion discovered 2015 Apr 27 by A. H. Parker, M. W. Buie, W. M. Grundy, K. S. Noll using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2016 Apr 26 [P16a]. Provisional designation S/2015 (136472) 1.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2016 by Wm. Robert Johnston.
Last modified 28 April 2016.
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