Minor Planet Radar Database
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1862 Apollo (1932 HA)
Classification: APO [NEO, PHA]
H:16.25 mag, G:0.09

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
1980 Nov Arecibo Arecibo 2380 [A]
1980 Nov Goldstone Goldstone 8495 [G]
2005 Oct Arecibo Arecibo 2380 [A]
2005 Oct Goldstone Goldstone 8560 [G]

Radar-Based Physical Properties
name symbol value units uncertainty reference notes
morphology
number of components N 2 - binary
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 0.33 0.01 2008Icar..198..294B Date: 1980T

Orbital Elements at Epoch 2019-04-27 00:00 TT from MPO467637 (heliocentric ecliptic J2000)
Element Value Units
e 0.5598234
a 1.4700451 AU
i 6.35515 deg
om 35.63059 deg
w 285.97066 deg
ma 227.37987 deg
n 0.55297829 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
2014-08-21 04:26:00 0.37314 372.4 0.9
2021-11-22 08:44:00 0.21162 211.2 6.8
2023-05-30 10:16:00 0.21282 212.4 6.7

Link to complete Close-Approach Data on SBDB at JPL