Asteroid Radar Database
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4 Vesta
Classification:  []
H:3.25 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
1979 Nov Arecibo Arecibo 2380 [A]
1981 Feb Arecibo Arecibo 2380 [A]
1988 Jan Arecibo Arecibo 2380 [A]
1992 Mar Arecibo Arecibo 2380 [A]
1992 Mar Goldstone Goldstone 8560 [G]
2001 Nov Arecibo Arecibo 2380 [A]
2003 Mar Arecibo Arecibo 2380 [A]

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 2630 Hz 1980Icar...43..169O
minimum Doppler bandwidth Bmin 1380 Hz 1980Icar...43..169O
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 0.2 km2 .1 1980Icar...43..169O Freq: 2380
radar cross-section SC σSC km2
radar cross-section σT km2
projected area Aproj km2
radar albedo OC σ̂OC 0.084 .027 1996Icar..124..113M Freq: 2380
at 3.5cm .150+/-0.40
radar albedo SC σ̂SC
radar albedo σ̂T
circular polarization ratio μC 0.24 .04 1996Icar..124..113M Freq: 2380
at 3.5cm, 0.32+/-0.04

Orbital Elements at Epoch 2024-03-31 00:00 TT from E2024-H84 (heliocentric ecliptic J2000)
Element Value Units
e 0.0898971
a 2.3609571 AU
i 7.14391 deg
om 103.70487 deg
w 151.69318 deg
ma 223.65555 deg
n 0.27168892 deg/d

Link to complete orbital information at Minor Planet Center