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Asteroids with Satellites Database--Johnston's Archive

(153591) 2001 SN263,"Beta",and "Gamma"

compiled by Wm. Robert Johnston
last updated21 September 2014

--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, Amor


orbital data, primary (osculating elements)[JPL]:

semimajor axisa:1.986951527 AU
orbital periodP:2.800845229 yr
(= 1023.008720 d)
eccentricitye:0.478406719
perihelion distanceq:1.036380566 AU
aphelion distanceQ:2.937522489 AU
inclinationi:6.6857566°
argument of perihelionω:172.8285743°
ascending nodeΩ:325.8353797°
mean anomalyM:86.287743°
perihelion passageTP:2013 Sep 19.79690
Epoch:2014 May 23
data arc:1990-2010(726 obs.)
Earth MOID:0.0506095 AU
Jupiter Tisserand invariantTJ:3.697

orbital data, "Beta":

semimajor axisas:16.633± 0.163 km[F11a]
separation/primary radiusas/rp:13 [*D]
separation/Hill radiusas/rH:0.092 [*D]
orbital periodPs:6.225± 0.0953d [F11a]
eccentricityes:0.015± 0.009[F11a]
inclinationis:157.486° ± 1.819° [F11a]
ascending nodeΩs:161.144° ± 13.055° [F11a]
argument of pericenterωs:131.249° ± 21.918° [F11a]
mean anomalyM:212.658° ± 10.691° [F11a]
Epoch:2008 Feb 13.0
normalized ang. mom.αL:?

orbital data, "Gamma":

semimajor axisas:3.804± 0.002 km[F11a]
separation/primary radiusas/rp:2.9 [*D]
separation/Hill radiusas/rH:0.021 [*D]
orbital periodPs:0.686± 0.00159d [F11a]
eccentricityes:0.016± 0.002[F11a]
inclinationis:165.045° ± 12.409° [F11a]
ascending nodeΩs:198.689° ± 61.292° [F11a]
argument of pericenterωs:292.435° ± 53.481° [F11a]
mean anomalyM:248.816° ± 11.509° [F11a]
Epoch:2008 Feb 13.0
normalized ang. mom.αL:?
other data, system (combined):
absolute mag.H:16.9[MPC]
16.861 ± 0.805 [JPL]
slope parameterG:(0.15) [*A]
effective diameterdE:2.85 km [*D]
geometric albedo:0.04[N08a]
color indexU-B:?
color indexB-V:?
taxonomic type:?
massm:9.51x1012 ± 1.3x1011kg [F11a]
densityρ:0.85± 0.15 g/cm3[N08a]
Hill radiusrH:180 km [*D]

other data, primary:

diameterdp:2.6 km [F12a]
rotation periodRPp:3.4250± 0.0002h [H08a]
amplitude in mag., rotationalΔM:0.15± 0.02 [H08b]
amplitude in mag., mutual eventsΔM:0.27 ±0.07 [H08b]
pole directionΒ, λ:?,?

other data, "Beta":

diameterds:1.06km [F12a]
diameter ratiods/dp:0.408 [*D]
component mag. differenceΔM:1.9 [* D]
rotation periodRPs:?

other data, "Gamma":

diameterds:0.46km [F12a]
diameter ratiods/dp:0.177 [*D]
component mag. differenceΔM:3.8 [* D]
rotation periodRPs:?

--(153591) 2001 SN263, "Beta", and "Gamma" --discovery and notes:

Primary discovered2001 Sep 20from Socorro, New Mexico, USAby LINEAR.Linked to prediscovery observations from 1990 Sep 25.Permanent number assigned 2007 Apr 02.

Companion "Beta" discovered2008 Feb 12 by M. C. Nolan, E. S. Howell, L. A. M. Benner, S. J. Ostro, J. D. Giorgini, M. W. Busch, L. M. Carter, R. F. Anderson, C. Magri, D. B. Campbell, J. L. Margot, and R. Vervackusingradar observations from Arecibo Observatory, Puerto Rico.Announced2008 Feb 12 [N08e].

Companion "Gamma" discovered2008 Feb 12 by M. C. Nolan, E. S. Howell, L. A. M. Benner, S. J. Ostro, J. D. Giorgini, M. W. Busch, L. M. Carter, R. F. Anderson, C. Magri, D. B. Campbell, J. L. Margot, and R. Vervackusingradar observations from Arecibo Observatory, Puerto Rico.Announced2008 Feb 12 [N08e].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


©2008-2012, 2014by Wm. Robert Johnston.
Last modified21 September 2014.
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