Asteroid Radar Database
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13651 (1997 BR)
Classification: APO [NEO, PHA]
H:17.81 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
1997 Jul Goldstone Goldstone 8560 [G]
2014 Jun 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 0.16 0.04 2008Icar..198..294B Date: 1997T

Orbital Elements at Epoch 2022-01-21 00:00 TT from MPO660785 (heliocentric ecliptic J2000)
Element Value Units
e 0.3055445
a 1.3355356 AU
i 17.24785 deg
om 116.66285 deg
w 133.8094 deg
ma 344.08152 deg
n 0.63858815 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
2014-03-08 23:55:00 0.32064 320.0 1.2
2014-06-23 09:23:00 0.20004 199.6 6.3
2017-08-11 00:53:00 0.31410 313.5 1.3
2031-03-21 20:33:00 0.29844 297.8 1.6
2031-05-09 09:35:00 0.30039 299.8 1.5

Link to complete Close-Approach Data on SBDB at JPL