Asteroid Radar Database
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138258 (2000 GD2)
Classification: ATE [NEO]
H:19.1 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2002 Mar Goldstone Goldstone 8560 [G]

Radar-Based Physical Properties
name symbol value units uncertainty reference notes
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 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
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 0.32 0.15 2008Icar..198..294B Date: 2002T

Orbital Elements at Epoch 2022-01-21 00:00 TT from MPO338199 (heliocentric ecliptic J2000)
Element Value Units
e 0.4767596
a 0.7577601 AU
i 32.13794 deg
om 358.12053 deg
w 16.97517 deg
ma 165.91661 deg
n 1.49419219 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
2014-04-10 07:20:00 0.44880 447.9 0.1
2025-03-21 05:42:00 0.42953 428.7 0.1
2027-03-18 07:16:00 0.32238 321.7 0.4
2029-03-15 09:05:00 0.21854 218.1 1.6
2031-03-14 23:52:00 0.12618 125.9 10.7

Link to complete Close-Approach Data on SBDB at JPL