Asteroid Radar Database
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(2003 HM)
Classification: ATE [NEO]
H:22.11 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2003 Apr Arecibo Arecibo 2380 [A]
2014 Apr Goldstone Goldstone 8560 [G]
2014 Apr 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 2025-11-21 00:00 TT from MPO955382 (heliocentric ecliptic J2000)
Element Value Units
e 0.2696224
a 0.8137555 AU
i 26.2731 deg
om 30.43837 deg
w 19.36431 deg
ma 69.0089 deg
n 1.34265104 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
2017-01-02 02:55:00 0.48085 479.9 0.0
2017-04-27 10:58:00 0.29732 296.7 0.1
2019-11-17 11:15:00 0.41997 419.1 0.0
2022-04-26 22:37:00 0.43576 434.9 0.0
2022-10-10 02:48:00 0.39254 391.8 0.0
2025-04-20 03:34:00 0.07511 75.0 8.1
2025-08-28 13:08:00 0.44192 441.0 0.0
2028-01-11 16:00:00 0.48104 480.1 0.0
2028-04-26 03:11:00 0.26095 260.4 0.1
2030-11-22 09:21:00 0.42829 427.4 0.0
2033-04-28 09:30:00 0.48783 486.9 0.0
2033-10-15 11:51:00 0.39094 390.2 0.0

Link to complete Close-Approach Data on SBDB at JPL