Asteroid Radar Database
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425755 (2011 CP4)
Classification: ATE [NEO, PHA]
H:21.16 mag, G:0.15

  MPC page for this object   |  JPL SBDB page for this object   |  NEODyS-2 page for this object   |  ESA SSA page for this object  

History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2012 Feb Arecibo Arecibo 2380 [A]
2012 Feb Goldstone Goldstone 8560 [G]
2012 Feb Arecibo Very Long Baseline Array 2380 [A-VLBA]

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
radar albedo SC σ̂SC
radar albedo σ̂T
circular polarization ratio μC

Orbital Elements at Epoch 2024-03-31 00:00 TT from E2024-C24 (heliocentric ecliptic J2000)
Element Value Units
e 0.8702321
a 0.911636 AU
i 9.46502 deg
om 147.98461 deg
w 159.92502 deg
ma 279.91197 deg
n 1.13232703 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
2014-12-29 22:05:00 0.18390 183.5 0.7
2018-02-24 06:15:00 0.42462 423.8 0.0
2019-02-15 11:51:00 0.22152 221.1 0.3
2021-01-15 11:10:00 0.36066 359.9 0.1
2021-12-30 02:07:00 0.35097 350.3 0.1
2025-02-27 11:23:00 0.26166 261.1 0.2
2026-02-06 11:48:00 0.41117 410.3 0.0
2028-01-07 22:45:00 0.19190 191.5 0.6
2029-01-03 19:52:00 0.48824 487.3 0.0
2032-02-26 07:02:00 0.08089 80.7 11.3

Link to complete Close-Approach Data on SBDB at JPL