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Asteroids with Satellites Database--Johnston's Archive
(9332) 1990 SB1
compiled by Wm. Robert Johnston
last updated3 May 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: | 2.579766173 AU | | orbital periodP: | 4.1435302684 yr
(= 1513.453014 d) | | eccentricitye: | 0.109236047 | | perihelion distanceq: | 2.29796272 AU | | aphelion distanceQ: | 2.861569631 AU | | inclinationi: | 12.6585623° | | argument of perihelionω: | 211.872094° | | ascending nodeΩ: | 346.399699° | | mean anomalyM: | 132.70205° | | perihelion passageTP: | 2017 Oct 16.11579 | | Epoch: | 2019 Apr 27 | | data arc: | 1951-2019(1687 obs.) | | Earth MOID: | 1.30791 AU | | Jupiter Tisserand invariantTJ: | 3.383 |
orbital data, secondary: | semimajor axisas: | 21 km[*E] | | separation/primary radiusas/rp: | 7.0 [*E] | | separation/Hill radiusas/rH: | 0.020 [*E] | | orbital periodPs: | 2.035± 0.0012d [P19c] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 13.1[MPC]
13.32 ± 0.03 [P19c] | | slope parameterG: | 0.28 [P19c] | | effective diameterdE: | 6.18± 0.20 km [M11b] | | geometric albedo: | 0.320± 0.065[M11b] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 1100 km [*E] |
other data, primary: | diameterdp: | 5.98± 0.19 km [*D] | | rotation periodRPp: | 2.98701± 0.00008h [P19c] | | amplitude in mag., rotationalΔM: | 0.39 [P19c] | | amplitude in mag., mutual eventsΔM: | 0.07 [P19c] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 1.56± 0.13km [*D] | | diameter ratiods/dp: | 0.26± 0.02 [P19c] | | component mag. differenceΔM: | 2.9± 0.2 [*D] | | rotation periodRPs: | ? | |
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--(9332) 1990 SB1 --discovery and notes:
Primary discovered1990 Sep 16from Palomar Observatory, California, USAby H. E. Holt.Alternate designation(s): 1951 EZ2, 1994 TU15.Linked to prediscovery observations from 1951 Mar 05.Permanent number assigned 1998 Oct 05.
Companion discovered2019 Sep 21 by P. Pravec, P. Kusnirak, K. Hornoch, H. Kucakova, P. Fatkausinglightcurve observations from La Silla Obsevatory; Ondrejov Observatory.Announced2019 Oct 16 [P19c].
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©2019, 2022by Wm. Robert Johnston.
Last modified3 May 2022.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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