Asteroid Radar Database
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5381 Sekhmet (1991 JY)
Classification: ATE [NEO]
H:16.72 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2003 May Arecibo Arecibo 2380 [A]
2015 May Arecibo Arecibo 2380 [A]

Radar-Based Physical Properties
name symbol value units uncertainty reference notes
morphology
number of components N 2 - binary
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 0.52 0.02 2008Icar..198..294B Date: 2003T

Orbital Elements at Epoch 2025-11-21 00:00 TT from MPO951018 (heliocentric ecliptic J2000)
Element Value Units
e 0.2964298
a 0.9474333 AU
i 48.96624 deg
om 58.52921 deg
w 37.43101 deg
ma 266.61833 deg
n 1.06876221 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
2016-05-17 11:59:00 0.48894 488.0 0.2
2016-11-04 15:06:00 0.33689 336.2 0.6
2026-05-21 23:10:00 0.24573 245.2 1.9
2027-05-17 03:16:00 0.20330 202.9 3.7
2027-12-02 12:04:00 0.33433 333.7 0.7
2028-10-31 08:16:00 0.37125 370.5 0.5

Link to complete Close-Approach Data on SBDB at JPL