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Asteroids with Satellites Database--Johnston's Archive
(88710) 2001 SL9
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:NEA, Apollo
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 1.0614194075 AU | | orbital periodP: | 1.0935502358 yr
(= 399.41922364 d) | | eccentricitye: | 0.270148028 | | perihelion distanceq: | 0.774679047 AU | | aphelion distanceQ: | 1.3481597678 AU | | inclinationi: | 21.9015069° | | argument of perihelionω: | 329.3392946° | | ascending nodeΩ: | 202.8382315° | | mean anomalyM: | 238.2268028° | | perihelion passageTP: | 2021 Nov 13.1070997 | | Epoch: | 2021 Jul 01 | | data arc: | 1954-2016(1016 obs.) | | Earth MOID: | 0.197073 AU | | Jupiter Tisserand invariantTJ: | 5.709 |
orbital data, secondary: | binary dynamical type: | A [P07f] | | semimajor axisas: | 1.35± 0.64 km[*D] | | separation/primary radiusas/rp: | 3.5 [S21c] | | separation/Hill radiusas/rH: | 0.028 [*E] | | orbital periodPs: | 0.683435± 0.00002d [S21c] | | eccentricityes: | <0.07[S21c] | | normalized ang. mom.αL: | 1.14[P07f] |
| other data, system (combined):| absolute mag.H: | 17.6[MPC]
17.98 ± 0.02 [S21c] | | slope parameterG: | 0.34 [S21c] | | effective diameterdE: | 0.77± 0.34 km [S21c] | | geometric albedo: | 0.2± 0.05[S21c] | | color indexU-B: | ? | | color indexB-V: | ? | | color indexV-R: | 0.457 ± 0.01 [S21c] | | taxonomic type: | Sr, Q (SMASSII) [S21c] | | massm: | ? | | densityρ: | 1.8± 2.5/0.5 g/cm3[S21c] | | Hill radiusrH: | 48 km [*E] |
other data, primary: | diameterdp: | 0.77± 0.34 km [S21c] | | axial ratiosa/b, b/c: | 1.07, 1.64 [S21c] | | rotation periodRPp: | 2.4004± 0.0002h [S21c] | | amplitude in mag., rotationalΔM: | 0.08 [H03a] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 0.18± 0.08km [S21c] | | axial ratiosa/b, b/c: | 1.2;? [S21c] | | diameter ratiods/dp: | 0.24± 0.02 [S21c] | | component mag. differenceΔM: | 3.10± 0.18 [*D] | | rotation periodRPs: | 16.4022h [S21c] | |
|
--(88710) 2001 SL9 --discovery and notes:
Primary discovered2001 Sep 18from Palomar Observatory, California, USAby NEAT.Linked to prediscovery observations from 1954 Nov 27.Permanent number assigned 2004 Aug 30.
Companion discovered2001 Oct 02 by P. Pravec, P. Kusnirak, and B. D. Warnerusinglightcurve observations from Ondrejov Observatory, Czech Republic; Palmer Divide Observatory, Colorado Springs, Colorado, USA.Announced2001 Nov 03 [P01a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Pravec, Petr & Scheirich, P. 2010, Bulletin of the American Astronomical SocietyBinary System Candidates for Detection of BYORP
- Haver, R., Pelloni, A., Forti, G., Boattini, A., Gnadig, A., Stoss, R., & Spahr, T. B. 2001, Minor Planet Electronic Circ., 2001-S21 (2001).2001 SL9
- Tichy, M., Kocer, M., Moravec, Z., Knoefel, A., Griesser, M., Kusnirak, P., Helin, E. F., Pravdo, S., Lawrence, K., Hicks, M., Hovland, E., Bickler, T., Schroeder, J., Scherr, L., Thicksten, R., Deetz, A., Blythe, M., Shelly, F., Bezpalko, M., Huber, R., Manguso, L., Adams, S., Stuart, J., Sayer, R., Evans, J. B., Viggh, H., Klinglesmith, D. A., III, McGaha, J. E., Dyvig, R., & Spahr, T. B. 2001, Minor Planet Electronic Circ., 2001-S16 (2001).2001 SL9
©2001-2014, 2021by Wm. Robert Johnston.
Last modified9 October 2021.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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