Asteroid Radar Database
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85989 (1999 JD6)
Classification: ATE [NEO, PHA]
H:17.07 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 Jul Arecibo Arecibo 2380 [A]
2015 Jul Arecibo Arecibo 2380 [A]
2015 Jul Goldstone Goldstone 8560 [G]
2015 Jul Goldstone Green Bank Telescope 8560 [G-GBT]
2020 Jul 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 2025-05-05 00:00 TT from E2025-GB2 (heliocentric ecliptic J2000)
Element Value Units
e 0.6328447
a 0.8831082 AU
i 17.06608 deg
om 130.1455 deg
w 309.25581 deg
ma 215.96084 deg
n 1.18763566 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
2015-07-25 04:55:00 0.04842 48.3 1738.8
2018-05-02 12:39:00 0.35363 352.9 1.7
2020-07-20 12:59:00 0.13077 130.5 55.6
2023-04-27 08:07:00 0.30395 303.3 2.9
2024-06-21 08:28:00 0.49253 491.6 0.5
2025-07-16 02:09:00 0.24350 243.0 6.4
2028-04-21 12:49:00 0.29652 295.9 3.2
2029-06-30 04:03:00 0.45844 457.5 0.7
2030-07-11 04:23:00 0.35876 358.1 1.6
2033-04-18 18:53:00 0.33830 337.6 2.0
2034-07-09 15:47:00 0.40285 402.0 1.1
2035-07-05 19:27:00 0.47795 477.0 0.6

Link to complete Close-Approach Data on SBDB at JPL