Asteroid Radar Database
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23187 (2000 PN9)
Classification: APO [NEO, PHA]
H:16.06 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2001 Mar Goldstone Goldstone 8560 [G]
2001 Mar Arecibo Arecibo 2380 [A]
2006 Mar Goldstone Goldstone 8560 [G]

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 0.24 0.02 2008Icar..198..294B Date: 2001T

Orbital Elements at Epoch 2024-03-31 00:00 TT from E2024-LC5 (heliocentric ecliptic J2000)
Element Value Units
e 0.5892675
a 1.8471391 AU
i 51.32555 deg
om 164.30495 deg
w 293.51968 deg
ma 88.97601 deg
n 0.39260396 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
2016-03-15 12:31:00 0.23220 231.7 7.4
2021-03-21 01:32:00 0.34613 345.4 1.8
2026-03-26 17:06:00 0.45880 457.9 0.7

Link to complete Close-Approach Data on SBDB at JPL