Asteroid Radar Database
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(2012 QG42)
Classification: APO [NEO, PHA]
H:20.9 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2012 Sep Goldstone Goldstone 8560 [G]
2012 Sep Arecibo Arecibo 2380 [A]
2012 Sep Arecibo Very Long Baseline Array 2380 [A-VLBA]

Radar-Based Physical Properties
                 [edit]
name symbol value units uncertainty reference notes
morphology
number of components N
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

Orbital Elements at Epoch 2025-05-05 00:00 TT from MPO562383 (heliocentric ecliptic J2000)
Element Value Units
e 0.3745127
a 1.0257408 AU
i 6.80831 deg
om 344.7694 deg
w 116.1877 deg
ma 352.29889 deg
n 0.94874096 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
2016-01-11 07:52:00 0.34812 347.4 0.2
2016-06-16 20:16:00 0.40176 401.0 0.1
2017-02-13 23:05:00 0.29701 296.4 0.4
2017-05-21 15:03:00 0.32956 328.9 0.2
2018-04-08 09:44:00 0.14778 147.5 4.1
2019-04-22 22:50:00 0.14138 141.1 4.8
2020-05-03 14:41:00 0.36087 360.1 0.2

Link to complete Close-Approach Data on SBDB at JPL