Minor Planet Radar Database
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494999 (2010 JU39)
Classification: ATE [NEO, PHA]
H:19.6 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2019 Jun 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 2019-04-27 00:00 TT from MPO456402 (heliocentric ecliptic J2000)
Element Value Units
e 0.5461768
a 0.9189928 AU
i 36.21342 deg
om 95.1791 deg
w 311.39094 deg
ma 217.13968 deg
n 1.11875743 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
2010-01-12 16:21:00 0.46669 465.8 0.1
2011-06-25 07:50:00 0.42600 425.2 0.1
2012-06-19 06:17:00 0.20245 202.0 1.4
2017-02-05 13:09:00 0.47395 473.0 0.1
2019-06-28 15:42:00 0.06020 60.1 91.1
2025-01-01 08:01:00 0.48560 484.6 0.1
2026-06-29 07:19:00 0.32303 322.4 0.3
2027-06-15 04:35:00 0.32074 320.1 0.3

Link to complete Close-Approach Data on SBDB at JPL