Minor Planet Radar Database
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1 Ceres
Classification:  []
H:3.34 mag, G:0.12

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
1977 Mar Arecibo Arecibo 2380 [A]
1984 Oct Arecibo Arecibo 2380 [A]
1986 Feb Arecibo Arecibo 2380 [A]
1990 Jan Arecibo Arecibo 2380 [A]
1995 Feb Goldstone Goldstone 8510 [G]
2000 Mar Arecibo Arecibo 2380 [A]
2004 Jan Arecibo Arecibo 2380 [A]
2018 Feb 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 0.041 .005 2007Icar..186..126M Freq: 2380
.037+/-0.01 at (3.5cm)
radar albedo SC σ̂SC
radar albedo σ̂T
circular polarization ratio μC 0.03 .03 2007Icar..186..126M Freq: 2380
0.00+/-0.7 at (3.5cm)

Orbital Elements at Epoch 2019-04-27 00:00 TT from MPO467603 (heliocentric ecliptic J2000)
Element Value Units
e 0.0760091
a 2.7691652 AU
i 10.59407 deg
om 80.30553 deg
w 73.59764 deg
ma 77.37215 deg
n 0.21388522 deg/d

Link to complete orbital information at Minor Planet Center