Asteroid Radar Database
  Return to list of asteroid radar detections  

4953 (1990 MU)
Classification: APO [NEO, PHA]
H:15.02 mag, G:0.15

  MPC page for this object   |  JPL SBDB page for this object   |  NEODyS-2 page for this object   |  ESA SSA page for this object  

History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
1994 May Goldstone Goldstone 8560 [G]

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 0.36 0.03 2008Icar..198..294B Date: 1994T

Orbital Elements at Epoch 2021-07-05 00:00 TT from MPO636139 (heliocentric ecliptic J2000)
Element Value Units
e 0.6576461
a 1.6213125 AU
i 24.38821 deg
om 77.69994 deg
w 77.75626 deg
ma 72.22064 deg
n 0.47742373 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
2016-11-07 19:28:00 0.39026 389.5 5.8
2018-11-29 10:38:00 0.10683 106.6 529.2
2021-01-07 06:33:00 0.39527 394.5 5.5
2025-05-16 20:09:00 0.38253 381.8 6.2
2027-06-06 22:43:00 0.03083 30.8 38422.7
2029-06-24 23:17:00 0.41391 413.1 4.7

Link to complete Close-Approach Data on SBDB at JPL