Asteroid Radar Database
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1580 Betulia (1950 KA)
Classification: AMO [NEO]
H:14.69 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
1976 May Arecibo Arecibo 2380 [A]
1989 May Goldstone Goldstone 8560 [G]
1989 May Arecibo Arecibo 2380 [A]
2002 Jun Arecibo Arecibo 2380 [A]

Radar-Based Physical Properties
name symbol value units uncertainty reference notes
number of components N 1 - single 2007Icar..186..152M
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 6.13 h 0.006 1979Icar...40..350P
spin rate ω 1409.462 deg/day Calculated (360*24/Pspin)
YORP acceleration ω̇ deg/day2
spin axis ecliptic longitude λ deg
spin axis ecliptic latitude β deg
radar cross-section OC σOC 2.2 km2 0.8 1979Icar...40..350P Freq: 2380 Date: 1976-05-19T
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 0.2 0.03 2008Icar..198..294B Date: 2002T

Orbital Elements at Epoch 2022-01-21 00:00 TT from MPO660785 (heliocentric ecliptic J2000)
Element Value Units
e 0.4871551
a 2.1972882 AU
i 52.07926 deg
om 62.29212 deg
w 159.51347 deg
ma 16.62891 deg
n 0.30260322 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
2015-06-03 08:52:00 0.35219 351.5 12.4
2028-06-07 13:47:00 0.47785 476.9 4.3

Link to complete Close-Approach Data on SBDB at JPL