Asteroid Radar Database
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25143 Itokawa (1998 SF36)
Classification: APO [NEO, PHA]
H:19.26 mag, G:0.15
Wavefront file Reference: 2005M&PS...40.1563O

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2001 Mar Arecibo Arecibo 2380 [A]
2001 Mar Goldstone Goldstone 8560 [G]
2004 Jun Arecibo Green Bank Telescope 2380 [A-GBT]
2004 Jun Arecibo Very Long Baseline Array 2380 [A-VLBA]
2004 Jun 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 0.27 0.04 2008Icar..198..294B Date: 2001T

Orbital Elements at Epoch 2024-03-31 00:00 TT from MPO691964 (heliocentric ecliptic J2000)
Element Value Units
e 0.2803312
a 1.3241426 AU
i 1.62121 deg
om 69.07604 deg
w 162.82119 deg
ma 13.19568 deg
n 0.64684756 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
2030-03-06 00:25:00 0.37608 375.3 0.2
2030-09-14 12:11:00 0.49978 498.8 0.1
2033-03-23 15:55:00 0.08530 85.1 33.1
2033-08-13 15:13:00 0.34560 344.9 0.2

Link to complete Close-Approach Data on SBDB at JPL