Minor Planet Radar Database
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152770 (1999 RR28)
Classification: APO [NEO, PHA]
H:18.4 mag, G:0.15

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

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 0.9 0.1 2008Icar..198..294B Date: 2005T

Orbital Elements at Epoch 2019-04-27 00:00 TT from MPO453987 (heliocentric ecliptic J2000)
Element Value Units
e 0.6541151
a 1.8785242 AU
i 7.1349 deg
om 178.28761 deg
w 284.44596 deg
ma 186.1044 deg
n 0.38280612 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
2012-09-17 16:15:00 0.46445 463.5 0.2
2017-12-16 17:57:00 0.33544 334.8 0.5
2023-04-06 17:54:00 0.19191 191.5 3.7

Link to complete Close-Approach Data on SBDB at JPL