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Asteroids with Satellites Database--Johnston's Archive
(57202) 2001 QJ53
compiled by Wm. Robert Johnston
last updated9 October 2021--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: | 2.3374064542 AU | | orbital periodP: | 3.573629797 yr
(= 1305.2682834 d) | | eccentricitye: | 0.156685132 | | perihelion distanceq: | 1.971169614 AU | | aphelion distanceQ: | 2.703643294 AU | | inclinationi: | 4.2457482° | | argument of perihelionω: | 36.634583° | | ascending nodeΩ: | 23.361225° | | mean anomalyM: | 128.032461° | | perihelion passageTP: | 2020 Mar 23.786915 | | Epoch: | 2021 Jul 01 | | data arc: | 1971-2021(1143 obs.) | | Earth MOID: | 0.985 AU | | Jupiter Tisserand invariantTJ: | 3.546 |
orbital data, secondary: | semimajor axisas: | 5 km[*E] | | separation/primary radiusas/rp: | 4.6 [*E] | | separation/Hill radiusas/rH: | 0.0145 [*E] | | orbital periodPs: | 1d [P21i] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 15.6[MPC]
15.84 ± 0.02 [P21i] | | slope parameterG: | 0.22 [P21i] | | effective diameterdE: | 2.2 km [*E] | | geometric albedo: | (0.16) [*A] | | color indexU-B: | ? | | color indexB-V: | ? | | color indexV-R: | 0.483 ± 0.012 [P19a] | | taxonomic type: | S (SMASSII) [P19a] | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 340 km [*E] |
other data, primary: | diameterdp: | 2.2 km [*E] | | rotation periodRPp: | 2.44482± 0.00007h [P19a] | | amplitude in mag., rotationalΔM: | 0.1 [P19a] | | amplitude in mag., mutual eventsΔM: | 0.095 ±0.015 [P19a] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | >0.5km [*E] | | diameter ratiods/dp: | >0.25 [*E] | | component mag. differenceΔM: | <3.0 [*E] | | rotation periodRPs: | ? | |
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--(57202) 2001 QJ53 --discovery and notes:
Primary discovered2001 Aug 16from Socorro, New Mexico, USAby Lincoln Laboratory Near-Earth Asteroid Research Team.Alternate designation(s): 1998 XZ38.Linked to prediscovery observations from 1971 Mar 25.Permanent number assigned 2003 Mar 18.
Companion discovered2017 Jan by P Pravec, et al.usinglightcurve observations.Announced2019 Jan 10 [P21i].
--Links, more technical:
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--Links to ADS abstracts:
©2021by Wm. Robert Johnston.
Last modified9 October 2021.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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