Movatterモバイル変換
[0]ホーム
Asteroids with Satellites Database--Johnston's Archive
(21527) Horton
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: | 2.578635661 AU | | orbital periodP: | 4.1408068835 yr
(= 1512.458279 d) | | eccentricitye: | 0.183169195 | | perihelion distanceq: | 2.10630904 AU | | aphelion distanceQ: | 3.05096228 AU | | inclinationi: | 12.6945139° | | argument of perihelionω: | 47.288121° | | ascending nodeΩ: | 286.407008° | | mean anomalyM: | 335.386683° | | perihelion passageTP: | 2019 Aug 08.407266 | | Epoch: | 2019 Apr 27 | | data arc: | 1951-2019(1511 obs.) | | Earth MOID: | 1.11539 AU | | Jupiter Tisserand invariantTJ: | 3.368 |
orbital data, secondary: | semimajor axisas: | 8.7 km[*E] | | separation/primary radiusas/rp: | 3.6 [*E] | | separation/Hill radiusas/rH: | 0.011 [*E] | | orbital periodPs: | 0.7267± 0.0004d [B19e] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 13.3[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 4.99± 0.35 km [M11b] | | geometric albedo: | 0.340± 0.064[M11b] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 800 km [*E] |
other data, primary: | diameterdp: | 4.88 km [*D] | | rotation periodRPp: | 2.76762± 0.00011h [B19e] | | amplitude in mag., rotationalΔM: | 0.08 [B19e] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | >1.02km [*D] | | diameter ratiods/dp: | >0.21 [B19e] | | component mag. differenceΔM: | <3.4 [*D] | | rotation periodRPs: | ? | |
|
--(21527) Horton --discovery and notes:
Primary discovered1998 Jun 24from Socorro, New Mexico, USAby LINEAR Program.Alternate designation(s):1998 MV27, 1999 XY191.Linked to prediscovery observations from 1951 Jan 04.Permanent number assigned 2001 Feb 08.
Named 2006 Jul 11 for Douglas Ray Horton (1988-) [MPC057275].
Companion discovered2019 Sep 04 by V. Benishek, P. Pravec, P. Kusnirak, V. Chiorny, D. Prayusinglightcurve observations from Sopot Observatory, Serbia; Chuguev station, Kharkiv Observatory, Ukraine; Sugarload Mountain Observatory.Announced2019 Oct 18 [B19e].
--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.
[8]ページ先頭