Asteroid Radar Database
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3103 Eger (1982 BB)
Classification: APO [NEO]
H:15.31 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
1986 Jul Arecibo Arecibo 2380 [A]
1991 Oct Goldstone Goldstone 8560 [G]
1996 Jul Goldstone Goldstone 8560 [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 0.92 0.06 2008Icar..198..294B Date: 1996T

Orbital Elements at Epoch 2024-10-17 00:00 TT from E2024-O34 (heliocentric ecliptic J2000)
Element Value Units
e 0.3541708
a 1.4040475 AU
i 20.92955 deg
om 129.73353 deg
w 254.11535 deg
ma 304.12275 deg
n 0.59242229 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
2016-08-02 13:24:00 0.18941 189.0 13.7
2021-07-31 17:20:00 0.23654 236.1 6.3
2026-07-29 14:52:00 0.29009 289.5 3.1
2031-07-27 06:37:00 0.34934 348.6 1.6

Link to complete Close-Approach Data on SBDB at JPL