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Asteroids with Satellites Database--Johnston's Archive
(341520) Mors-Somnus
compiled by Wm. Robert Johnston
last updated6 June 2015--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, plutino
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 39.32345656 AU | | orbital periodP: | 246.5958314 yr
(= 90069.12741 d) | | eccentricitye: | 0.266606565 | | perihelion distanceq: | 28.83956489 AU | | aphelion distanceQ: | 49.80734823 AU | | inclinationi: | 11.2856433° | | argument of perihelionω: | 205.7261065° | | ascending nodeΩ: | 196.7161545° | | mean anomalyM: | 355.4641997° | | perihelion passageTP: | 2017 Jun 30 | | Epoch: | 2014 May 23 | | data arc: | 2007-2012(37 obs.) | | Earth MOID: | 27.8508 AU | | Jupiter Tisserand invariantTJ: | 5.329 | | Neptune Tisserand invariantTN: | 2.92640993344029 [*D] |
orbital data, secondary: | semimajor axisas: | 21040± 70 km[G14a] | | separation/primary radiusas/rp: | 410 [*D] | | #DIV/0!orbital periodPs: | 971.7± 0.5d [G14a] | | eccentricityes: | 0.1492± 0.0006[G14a] | | inclinationis: | 15.68° ± 0.22° [S12b] | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 6.8[MPC]
6.94 ± 0.02 [S12b] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 141 km [S12b] | | geometric albedo: | 0.23[S12b] | | color indexU-B: | ? | | color indexB-V: | 1.29[S12b] | | color indexV-R: | 0.74 ± 0.01 [S12b] | | color indexB-R: | 2.03 ± 0.01 [S12b] | | color indexV-I: | 1.37 ± 0.02 [S12b] | | taxonomic type: | ? | | massm: | 7.81x1017 ± 9x1015kg [G14a] | | densityρ: | (0.75 g/cm3) [*A] | | Hill radiusrH: | 0 km [*D] |
other data, primary: | diameterdp: | 102 km [*D] | | rotation periodRPp: | 9.28h [T14a] | | amplitude in mag., rotationalΔM: | 0.24± 0.05 [T14a] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 97km [*D] | | diameter ratiods/dp: | 0.955 [S12b] | | component mag. differenceΔM: | 0.05± 0.05 [S08c] | | rotation periodRPs: | ? | |
|
--(341520) Mors-Somnus --discovery and notes:
Primary discovered2007 Oct 14from Mauna Kea Observatory, Hawaii, USAby S. S. Sheppard and C. A. Trujillo.Alternate designation(s):2007 TY430.Permanent number assigned 2012 Oct 29.
Named 2015 Jun 02 for the mythological Roman god of the underworld and death [MPC94392].
Companion discovered2007 Oct 14 by S. S. Sheppard and C. A. Trujillousingadaptive optics telescope observations from Subaru/Gemini/Magellen telescopes, Mauna Kea, Hawaii, USA.Announced2008 Aug 01 [S08c].Permanent designation I Somnus, assigned 2015 Jun 02; named for the mythological Roman god of the underworld and sleep [MPC94392].
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--Links to ADS abstracts:
©2008-2014, 2015by Wm. Robert Johnston.
Last modified6 June 2015.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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