2021 LD1

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6472481539 ± 6.87e-07
Semi-major axis (a)2.8032206772 AU ± 5.41e-06
Inclination (i)39.25835739° ± 2.33e-05
Long. of Asc. Node (Ω)110.83613523° ± 2.13e-06
Arg. of Perihelion (ω)183.56554134° ± 1.69e-05
Mean Anomaly (M)334.71497479° ± 9.70e-04
Mean Motion (n)0.2100034088°/day ± 6.07e-07
Perihelion dist (q)0.98884127 AU ± 2.71e-06
Aphelion dist (Q)4.61760009 AU ± 9.11e-06
Orbital Period4.69338231 yr ± 1.36e-05
Physical Parameters
H (abs. magnitude)20.29
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.253″
Uncertainty0
Orbit TypeApollo
MOID0.028462 AU
Observations Used84
Radar Obs Used3
Oppositions1
Arc Total2021-2021
First Observation Used2021-04-29
Last Observation Used2021-07-10
Observations (109)
Date Type RA Dec Mag Band Observatory
2021-07-10 03:51:22 C 02 56 23.99 +12 04 25.2 V G40
2021-07-10 04:00:16 C 02 56 30.78 +12 00 12.2 V G40
2021-09-05 14:30:24 S 05 40 32.75 -58 28 44.9 L C51
2021-09-05 17:38:32 S 05 40 27.91 -58 29 50.8 L C51
2021-09-05 20:46:51 S 05 40 22.93 -58 30 55.9 L C51
2021-09-05 23:54:59 S 05 40 17.95 -58 32 01.7 L C51
2021-09-06 03:02:34 S 05 40 12.83 -58 33 07.5 L C51
2021-09-06 06:11:26 S 05 40 07.70 -58 34 12.1 L C51
2021-09-06 09:19:45 S 05 40 02.42 -58 35 16.9 L C51
Radar Observations (3)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2021-07-11 12:10:00 -540319.346 2 Hz 8560 -14 -14
2021-07-11 12:20:00 70312292.76 10 us 8560 -14 -14
2021-07-11 13:10:00 70504380.5 2 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)