Asteroid Radar Database
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308635 (2005 YU55)
Classification: APO [NEO, PHA]
H:21.9 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
2010 Apr Arecibo Arecibo 2380 [A]
2011 Nov Goldstone Goldstone 8560 [G]
2011 Nov Arecibo Arecibo 2380 [A-GBT]
2011 Nov Goldstone Very Long Baseline Array 8560 [G-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 2021-07-05 00:00 TT from MPO437367 (heliocentric ecliptic J2000)
Element Value Units
e 0.4305816
a 1.1570749 AU
i 0.34022 deg
om 35.92688 deg
w 273.58358 deg
ma 318.91511 deg
n 0.79188458 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
2011-11-08 23:29:00 0.00217 2.2 0.0
2015-04-08 21:42:00 0.28332 282.8 0.8
2016-11-01 12:27:00 0.12365 123.4 14.8
2020-04-02 10:14:00 0.40958 408.8 0.2
2021-10-03 10:27:00 0.24684 246.4 1.3
2026-09-07 11:56:00 0.31388 313.3 0.6
2026-11-29 05:33:00 0.38151 380.7 0.3
2031-09-13 11:39:00 0.29827 297.7 0.7

Link to complete Close-Approach Data on SBDB at JPL