Asteroid Radar Database
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505657 (2014 SR339)
Classification: APO [NEO, PHA]
H:18.48 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
2018 Feb Goldstone Goldstone 8560 [G]
2018 Feb Arecibo Arecibo 2380 [A]

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 2024-10-17 00:00 TT from E2024-TQ2 (heliocentric ecliptic J2000)
Element Value Units
e 0.3038308
a 1.2994574 AU
i 29.79407 deg
om 138.73943 deg
w 299.63835 deg
ma 217.15989 deg
n 0.66536658 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
2015-02-17 20:30:00 0.28527 284.7 2.1
2017-08-21 16:29:00 0.37290 372.2 0.8
2018-02-07 23:17:00 0.05394 53.8 691.9
2020-08-27 07:28:00 0.30544 304.8 1.7
2021-01-30 11:46:00 0.19435 194.0 8.1
2023-08-30 15:58:00 0.33251 331.8 1.2
2024-01-25 05:19:00 0.42752 426.7 0.5
2026-08-28 19:46:00 0.45853 457.6 0.4

Link to complete Close-Approach Data on SBDB at JPL