Minor Planet Radar Database
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(2018 DH1)
Classification: APO [NEO, PHA]
H:21.1 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2018 Mar Arecibo Arecibo 2380 [A]
2018 Mar Goldstone Goldstone 8560 [G]

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 2020-05-31 00:00 TT from MPO473495 (heliocentric ecliptic J2000)
Element Value Units
e 0.6029589
a 2.0957831 AU
i 1.96827 deg
om 146.08734 deg
w 97.46497 deg
ma 245.69525 deg
n 0.32485126 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
2012-02-27 15:50:00 0.47048 469.5 0.0
2015-03-11 15:21:00 0.24499 244.5 0.3
2018-03-27 10:18:00 0.02357 23.5 907.2
2021-04-30 14:22:00 0.15719 156.9 1.3
2024-06-08 22:37:00 0.17783 177.5 0.8
2027-07-18 21:17:00 0.05678 56.7 45.0

Link to complete Close-Approach Data on SBDB at JPL