Asteroid Radar Database
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285331 (1999 FN53)
Classification: APO [NEO]
H:18.2 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
1999 May Goldstone Goldstone 8560 [G]
1999 May Arecibo Arecibo 2380 [A]
2015 May Arecibo Arecibo 2380 [A]
2015 May 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 0.19 0.07 2008Icar..198..294B

Orbital Elements at Epoch 2024-03-31 00:00 TT from E2024-FB1 (heliocentric ecliptic J2000)
Element Value Units
e 0.4562631
a 1.7351037 AU
i 20.17081 deg
om 50.56915 deg
w 191.73877 deg
ma 314.4981 deg
n 0.43123691 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
2015-05-14 11:25:00 0.06776 67.6 123.9
2031-05-18 03:45:00 0.08479 84.6 57.0

Link to complete Close-Approach Data on SBDB at JPL