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Asteroids with Satellites Database--Johnston's Archive
(136472) Makemakeand S/2015 (136472) 1
compiled by Wm. Robert Johnston
last updated28 April 2016--Orbital and physical data--
(Seethis page for definitions of quantities; source codes in brackets, seethis 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 axisa: | 45.7615 AU | | orbital periodP: | 309.564 yr
(= 113070.5 d) | | eccentricitye: | 0.154015 | | perihelion distanceq: | 38.7136 AU | | aphelion distanceQ: | 52.8095 AU | | inclinationi: | 28.9945152° | | argument of perihelionω: | 296.6074° | | ascending nodeΩ: | 79.5056° | | mean anomalyM: | 159.0192° | | perihelion passageTP: | 1879 Nov 01.5 | | Epoch: | 2016 Jul 31 | | data arc: | 1955-2016(1226 obs.) | | Earth MOID: | 37.8152 AU | | Jupiter Tisserand invariantTJ: | 5.24 | | Neptune Tisserand invariantTN: | 2.78938898879957 [*D] |
orbital data, secondary: | semimajor axisas: | >21100 km[P16b] | | separation/primary radiusas/rp: | 29.5104895104895 [*D] | | orbital periodPs: | 12.4d [P16b] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | -0.3[MPC]
0.091 ± 0.015 [P16b] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 1440 km [*D] | | geometric albedo: | 0.80 [B13a] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | 2.6x1021 ± 5x1020kg [*D] | | densityρ: | 1.7± 0.3 g/cm3[O12a] | | Hill radiusrH: | 4400000 km [*D] |
other data, primary: | diameterdp: | 1430± 14 km [B13a] | | geometric albedo: | 0.8± 0.01[B13a] | | rotation periodRPp: | 7.771h [P16b] | | amplitude in mag., rotationalΔM: | ? | | pole directionΒ, λ: | ?,? | | densityρp: | 1.7± 0.3 g/cm3 [O12a] | |
other data, secondary: | diameterds: | 175± 75km [P16b] | | diameter ratiods/dp: | 0.122 [P16b] | | component mag. differenceΔM: | 7.8± 0.04 [P16b] | | geometric albedo: | 0.07± 0.05 [P16b] | | rotation periodRPs: | ? | |
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--(136472) Makemake and S/2015 (136472) 1 --discovery and notes:
Primary discovered2005 Mar 31from Palomar Observatory, California, USAby 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 discovered2015 Apr 27 by A. H. Parker, M. W. Buie, W. M. Grundy, K. S. NollusingHubble Space Telescope observations from Hubble Space Telescope.Announced2016 Apr 26 [P16a].Provisional designation S/2015 (136472) 1.
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--Links to ADS abstracts:
©2016by Wm. Robert Johnston.
Last modified28 April 2016.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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