Minor Planet Radar Database
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54509 YORP (2000 PH5)
Classification: APO [NEO]
H:22.7 mag, G:0.15
Wavefront file Reference: 2007Sci...316..274T

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2001 Jul Goldstone Goldstone 8560 [G]
2004 Jul Arecibo Arecibo 2380 [A]
2005 Jul Arecibo Arecibo 2380 [A]

Radar-Based Physical Properties
                 [edit]
name symbol value units uncertainty reference notes
morphology
number of components N 1 - single 2007Sci...316..274T
morphological type irregular 2007Sci...316..274T Both linear and angular features
spectrum-based or image-based dimensions
maximum range extent Rmax 0.075 km 0.0075 2007Sci...316..274T
minimum range extent Rmin 0.06 km 0.0075 2007Sci...316..274T
maximum Doppler bandwidth Bmax 19 Hz 2 2007Sci...316..274T 2380 MHz (2005)
minimum Doppler bandwidth Bmin 10 Hz 1 2007Sci...316..274T 2380 MHz (2004)
effective diameter Deff 0.135 km 0.015 2007Sci...316..274T
quality code for size Q
shape-based dimensions
equivalent diameter Dequ 0.112777 km 5% 2007Sci...316..274T
extent along principal axis x Ex 0.149285 km 5% 2007Sci...316..274T
extent along principal axis y Ey 0.133513 km 5% 2007Sci...316..274T
extent along principal axis z Ez 0.095663 km 5% 2007Sci...316..274T
DEEVE extent along x Dx 0.134458 km 5% 2007Sci...316..274T
DEEVE extent along y Dy 0.111095 km 5% 2007Sci...316..274T
DEEVE extent along z Dz 0.096024 km 5% 2007Sci...316..274T
surface area A 0.04642422 km2 10% 2007Sci...316..274T
volume V 0.0007510349 km3 15% 2007Sci...316..274T
spin
spin period Pspin 0.2029007 h 0.0000001 2007Sci...316..274T 2001 July 27 at 0 h UTC
spin rate ω 42582.41 deg/day 0.02 2007Sci...316..274T 2001 July 27 at 0 h UTC
YORP acceleration ω̇ 0.0002 deg/day2 0.00002 2007Sci...316..274T
spin axis ecliptic longitude λ 180 deg 10 2007Sci...316..274T
spin axis ecliptic latitude β -85 deg 10 2007Sci...316..274T
reflectivity
radar cross-section OC σOC 0.0015 km2 0.0004 2007Sci...316..274T Freq: 2380&8560
radar cross-section SC σSC km2
radar cross-section σT km2
projected area Aproj km2
radar albedo OC σ̂OC 0.13 0.03 2007Sci...316..274T Freq: 2380&8560
radar albedo SC σ̂SC
radar albedo σ̂T
circular polarization ratio μC 0.21 0.02 2007Sci...316..274T Freq: 2380&8560

Orbital Elements at Epoch 2019-04-27 00:00 TT from MPO214232 (heliocentric ecliptic J2000)
Element Value Units
e 0.2299674
a 1.0059896 AU
i 1.59948 deg
om 278.23406 deg
w 278.93697 deg
ma 305.62662 deg
n 0.97681836 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
2010-08-06 01:58:00 0.27667 276.1 0.0
2011-08-08 17:30:00 0.32963 329.0 0.0
2012-08-10 07:18:00 0.38297 382.2 0.0
2013-08-12 22:35:00 0.43675 435.9 0.0
2014-08-15 14:04:00 0.49032 489.3 0.0

Link to complete Close-Approach Data on SBDB at JPL