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Asteroids with Satellites Database--Johnston's Archive
(2070) Humason
compiled by Wm. Robert Johnston
last updated30 April 2022--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:main belt asteroid
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 2.2500773375 AU | | orbital periodP: | 3.3751740109 yr
(= 1232.8055905 d) | | eccentricitye: | 0.1546556 | | perihelion distanceq: | 1.902090277 AU | | aphelion distanceQ: | 2.5980643984 AU | | inclinationi: | 2.752352° | | argument of perihelionω: | 350.332271° | | ascending nodeΩ: | 1.235392° | | mean anomalyM: | 77.218011° | | perihelion passageTP: | 2018 Aug 05.570013 | | Epoch: | 2019 Apr 27 | | data arc: | 1954-2018(1749 obs.) | | Earth MOID: | 0.895557 AU | | Jupiter Tisserand invariantTJ: | 3.61 |
orbital data, secondary: | semimajor axisas: | 17 km[*E] | | separation/primary radiusas/rp: | 7.8 [*E] | | separation/Hill radiusas/rH: | 0.026 [*E] | | orbital periodPs: | 2.229± 0.004d [B19b] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 13.4[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 4.57± 0.15 km [M11b] | | geometric albedo: | 0.405± 0.087[M11b] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 650 km [*E] |
other data, primary: | diameterdp: | 4.37± 0.15 km [*D] | | rotation periodRPp: | 3.1883± 0.0005h [B19b] | | amplitude in mag., rotationalΔM: | 0.15 [B19b] | | amplitude in mag., mutual eventsΔM: | 0.125 ±0.025 [B19b] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 1.35± 0.1km [*D] | | diameter ratiods/dp: | 0.31± 0.02 [B19b] | | component mag. differenceΔM: | 2.54± 0.14 [*D] | | rotation periodRPs: | ? | |
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--(2070) Humason --discovery and notes:
Primary discovered1964 Oct 14from Goethe Link Observatory, Brooklyn, Indiana, USAby Indiana Asteroid Program.Alternate designation(s):1964 TQ, 1954 UJ1, 1964 XM, 1974 QP, 1974 RB2.Linked to prediscovery observations from 1954 Oct 23.Permanent number assigned -.
Named 1983 Dec 20 for Milton L. Humason (1891-1972) [MPC008403].
Companion discovered2018 Oct 13 by V. Benishek, P. Pravec, F. Pilcher, V. Chiornyusinglightcurve observations from Sopot Observatory, Serbia; Organ Mesa Observatory, New Mexico, USA; Kharkiv Observatory, Chuguev, Ukraine.Announced2019 Jan 16 [B19b].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©2019, 2022by Wm. Robert Johnston.
Last modified30 April 2022.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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