Asteroid Radar Database
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85774 (1998 UT18)
Classification: APO [NEO, PHA]
H:19.07 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2003 Nov Arecibo Arecibo 2380 [A]
2008 Nov Arecibo Arecibo 2380 [A]
2013 Nov 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 0.25 0.01 2008Icar..198..294B Date: 2003T

Orbital Elements at Epoch 2022-01-21 00:00 TT from MPO637176 (heliocentric ecliptic J2000)
Element Value Units
e 0.3288655
a 1.4030292 AU
i 13.58618 deg
om 64.6284 deg
w 50.16989 deg
ma 305.50046 deg
n 0.59306734 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
2013-11-21 16:01:00 0.17238 172.0 29.3
2014-04-21 15:58:00 0.42057 419.7 1.3
2018-11-17 08:03:00 0.25727 256.8 7.2
2019-04-28 09:29:00 0.46230 461.4 0.9
2023-11-12 23:37:00 0.34810 347.4 2.5
2028-11-07 09:39:00 0.44397 443.1 1.1

Link to complete Close-Approach Data on SBDB at JPL