Asteroid Radar Database
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65803 Didymos (1996 GT)
Classification: AMO [NEO, PHA]
H:18.11 mag, G:0.15

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

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 0.2 0.02 2008Icar..198..294B Date: 2003T

Orbital Elements at Epoch 2024-03-31 00:00 TT from E2024-C06 (heliocentric ecliptic J2000)
Element Value Units
e 0.3832302
a 1.6426815 AU
i 3.41422 deg
om 72.98677 deg
w 319.59163 deg
ma 246.30742 deg
n 0.46813814 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
2022-10-04 09:48:00 0.07123 71.1 97.0

Link to complete Close-Approach Data on SBDB at JPL