Minor Planet 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 2019-04-27 00:00 TT from MPO473237 (heliocentric ecliptic J2000)
Element Value Units
e 0.3745633
a 1.0257312 AU
i 6.8094 deg
om 344.83771 deg
w 116.11951 deg
ma 65.04467 deg
n 0.94875425 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
2010-08-26 16:43:00 0.44263 441.7 0.1
2011-09-06 01:41:00 0.21739 217.0 1.1
2012-09-14 05:14:00 0.01909 19.1 4628.5
2013-08-30 03:35:00 0.23984 239.4 0.8
2013-10-25 06:07:00 0.25728 256.8 0.6
2014-07-31 16:30:00 0.36302 362.3 0.2
2014-12-09 14:31:00 0.34158 340.9 0.2
2015-07-09 12:36:00 0.41086 410.0 0.1
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