Asteroid Radar Database
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4450 Pan (1987 SY)
Classification: APO [NEO, PHA]
H:17.16 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2008 Feb 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 0.23 0.03 2008Icar..198..294B Date: 2008T

Orbital Elements at Epoch 2022-01-21 00:00 TT from MPO660785 (heliocentric ecliptic J2000)
Element Value Units
e 0.5864171
a 1.4422908 AU
i 5.52032 deg
om 311.8041 deg
w 291.8195 deg
ma 343.16947 deg
n 0.56901642 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
2015-01-30 02:15:00 0.40892 408.1 2.1
2020-05-30 22:48:00 0.42151 420.7 1.9
2025-09-24 13:21:00 0.46862 467.7 1.3
2027-04-06 18:32:00 0.33784 337.2 4.1
2032-09-03 17:40:00 0.06290 62.8 1424.2
2034-02-15 08:33:00 0.06489 64.8 1279.1

Link to complete Close-Approach Data on SBDB at JPL