Asteroid Radar Database
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232691 (2004 AR1)
Classification: APO [NEO, PHA]
H:19.86 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
2013 Aug Goldstone Goldstone 8560 [G]
2013 Aug Arecibo Arecibo 2380 [A]

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 2025-11-21 00:00 TT from MPO843042 (heliocentric ecliptic J2000)
Element Value Units
e 0.4694562
a 1.5760613 AU
i 9.07565 deg
om 336.4974 deg
w 50.32423 deg
ma 45.94591 deg
n 0.49813198 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
2017-08-04 12:36:00 0.19171 191.3 1.4
2019-07-28 14:04:00 0.31972 319.1 0.2
2021-07-20 23:19:00 0.45000 449.1 0.1

Link to complete Close-Approach Data on SBDB at JPL