Minor Planet Radar Database
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14827 Hypnos (1986 JK)
Classification: APO [NEO, PHA]
H:18.3 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
1986 May Goldstone Goldstone 8495 [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 0.26 0.02 2008Icar..198..294B Date: 1986T

Orbital Elements at Epoch 2019-04-27 00:00 TT from MPO309269 (heliocentric ecliptic J2000)
Element Value Units
e 0.6662082
a 2.840473 AU
i 1.98078 deg
om 57.96597 deg
w 238.10626 deg
ma 330.38398 deg
n 0.20588185 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
2024-06-02 20:58:00 0.07845 78.3 114.6

Link to complete Close-Approach Data on SBDB at JPL