Minor Planet Radar Database
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162000 (1990 OS)
Classification: APO [NEO, PHA]
H:19.4 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
1990 Aug Goldstone Goldstone 8495 [G]
2003 Nov Arecibo Arecibo 2380 [A]
2003 Nov Goldstone Goldstone 8560 [G]

Radar-Based Physical Properties
name symbol value units uncertainty reference notes
morphology
number of components N 2 - binary
morphological type
spectrum-based or image-based dimensions
maximum range extent Rmax km
minimum range extent Rmin km
maximum Doppler bandwidth Bmax Hz
minimum Doppler bandwidth Bmin Hz
effective diameter Deff km
quality code for size Q
shape-based dimensions
equivalent diameter Dequ km
extent along principal axis x Ex km
extent along principal axis y Ey km
extent along principal axis z Ez km
DEEVE extent along x Dx km
DEEVE extent along y Dy km
DEEVE extent along z Dz km
surface area A km2
volume V km3
spin
spin period Pspin h
spin rate ω deg/day
YORP acceleration ω̇ deg/day2
spin axis ecliptic longitude λ deg
spin axis ecliptic latitude β deg
reflectivity
radar cross-section OC σOC km2
radar cross-section SC σSC km2
radar cross-section σT km2
projected area Aproj km2
radar albedo OC σ̂OC
radar albedo SC σ̂SC
radar albedo σ̂T
circular polarization ratio μC 0.23 0.03 2008Icar..198..294B Date: 1990T

Orbital Elements at Epoch 2019-04-27 00:00 TT from MPO401364 (heliocentric ecliptic J2000)
Element Value Units
e 0.462426
a 1.6785172 AU
i 1.09229 deg
om 346.53756 deg
w 21.5642 deg
ma 53.12951 deg
n 0.45322658 deg/d

Link to complete orbital information at Minor Planet Center

Earth Close-Approach Data (+/- 10 years)
date nominal distance RTT SNR/run at Arecibo
2014-07-12 05:52:00 0.41671 415.9 0.1
2016-12-05 12:54:00 0.26804 267.5 0.4
2027-07-29 21:40:00 0.12898 128.7 4.8

Link to complete Close-Approach Data on SBDB at JPL