Asteroid Radar Database
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(2017 BM31)
Classification: APO [NEO]
H:20.76 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2017 Jul 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 2024-10-17 00:00 TT from E2024-BD1 (heliocentric ecliptic J2000)
Element Value Units
e 0.4935358
a 1.7826134 AU
i 6.61018 deg
om 132.61391 deg
w 96.12715 deg
ma 38.47347 deg
n 0.41411248 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
2017-07-05 16:47:00 0.07179 71.6 32.7
2029-03-10 15:24:00 0.15391 153.6 2.3

Link to complete Close-Approach Data on SBDB at JPL