Asteroid Radar Database
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5660 (1974 MA)
Classification: APO [NEO]
H:15.48 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2005 Jul Arecibo Arecibo 2380 [A]

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 0.37 0.15 2008Icar..198..294B Date: 2005T

Orbital Elements at Epoch 2022-01-21 00:00 TT from MPO636150 (heliocentric ecliptic J2000)
Element Value Units
e 0.7619004
a 1.7853962 AU
i 38.12773 deg
om 302.15954 deg
w 127.00718 deg
ma 304.97453 deg
n 0.41314468 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
2020-02-05 20:01:00 0.40906 408.2 3.9
2024-08-15 00:06:00 0.44349 442.6 2.9

Link to complete Close-Approach Data on SBDB at JPL