Asteroid Radar Database
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(2019 YF4)
Classification: APO [NEO]
H:27 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2020 Jan 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 2024-03-31 00:00 TT from E2023-Y63 (heliocentric ecliptic J2000)
Element Value Units
e 0.2148571
a 1.2627027 AU
i 0.20639 deg
om 259.97337 deg
w 216.79876 deg
ma 346.21799 deg
n 0.69462818 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
2016-08-22 05:41:00 0.48389 482.9 0.0
2020-01-10 09:25:00 0.00954 9.5 270.3
2026-09-13 00:29:00 0.41270 411.9 0.0
2029-11-23 02:38:00 0.41518 414.4 0.0
2030-05-12 05:26:00 0.36243 361.7 0.0

Link to complete Close-Approach Data on SBDB at JPL