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
2021-06-16 07:47:54 C 19 27 26.42 +66 58 40.8 V I52
2021-06-16 07:54:34 C 19 27 27.64 +66 58 44.3 V I52
2021-06-16 07:58:12 C 19 27 28.24 +66 58 46.6 V I52
2021-06-19 08:29:30 C 19 43 46.50 +67 39 09.3 V I52
2021-06-19 08:54:41 C 19 43 52.58 +67 39 24.0 V I52
2021-06-19 09:05:13 C 19 43 55.18 +67 39 30.3 V I52
2021-06-19 09:35:48 C 19 44 02.67 +67 39 47.8 V I52
2021-06-21 10:55:59 C 19 58 35.48 +68 07 52.5 V I52
2021-06-21 10:57:06 C 19 58 35.87 +68 07 53.0 V I52
2021-06-21 10:58:12 C 19 58 36.18 +68 07 53.7 V I52
2021-06-21 10:59:21 C 19 58 36.57 +68 07 54.2 V I52
2021-06-27 07:37:12 C 21 08 44.38 +69 06 42.7 V I52
2021-06-27 07:38:59 C 21 08 45.59 +69 06 42.8 V I52
2021-06-27 07:40:45 C 21 08 46.83 +69 06 43.3 V I52
2021-06-30 11:05:53 C 22 17 29.91 +68 18 19.9 V I52
2021-06-30 11:06:14 C 22 17 30.33 +68 18 18.9 V I52
2021-06-30 11:06:35 C 22 17 30.65 +68 18 18.3 V I52
2021-06-30 11:06:57 C 22 17 31.05 +68 18 17.9 V I52
2021-06-30 11:07:18 C 22 17 31.43 +68 18 17.6 V I52
2021-07-02 22:54:55 C 23 32 42.99 +64 59 32.8 V 033
2021-07-02 22:55:20 C 23 32 43.55 +64 59 30.6 V 033
2021-07-02 22:56:28 C 23 32 45.07 +64 59 24.8 V 033
2021-07-03 01:20:01 C 23 35 59.57 +64 46 25.3 V 033
2021-07-03 01:20:25 C 23 36 00.12 +64 46 22.9 V 033
2021-07-03 01:20:50 C 23 36 00.67 +64 46 20.8 V 033
2021-07-03 01:21:14 C 23 36 01.23 +64 46 18.9 V 033
2021-07-04 00:11:18 C 00 07 49.58 +62 08 17.6 V 033
2021-07-04 00:11:43 C 00 07 50.17 +62 08 14.2 V 033
2021-07-04 00:12:07 C 00 07 50.72 +62 08 10.9 V 033
2021-07-06 01:04:30 C 01 14 16.99 +52 27 49.6 V 033
2021-07-06 01:04:55 C 01 14 17.48 +52 27 43.4 V 033
2021-07-06 01:05:19 C 01 14 18.03 +52 27 36.5 V 033
2021-07-06 01:34:15 C 01 14 55.16 +52 19 55.3 V A17
2021-07-06 01:40:35 C 01 15 03.18 +52 18 15.2 V A17
2021-07-06 01:48:18 C 01 15 12.84 +52 16 11.6 V A17
2021-07-08 01:08:47 C 02 10 24.01 +35 45 03.9 V 033
2021-07-08 01:09:11 C 02 10 24.45 +35 44 53.4 V 033
2021-07-08 01:10:22 C 02 10 25.65 +35 44 23.7 V 033
2021-07-08 01:11:17 C 02 10 26.64 +35 44 00.2 V 033
2021-07-08 01:11:49 C 02 10 27.15 +35 43 46.8 V 033
2021-07-08 10:10:38 C 02 19 35.62 +31 49 25.2 V V37
2021-07-08 10:21:12 C 02 19 45.88 +31 44 43.6 V V37
2021-07-08 10:31:48 C 02 19 56.15 +31 40 00.3 V V37
2021-07-08 10:42:25 C 02 20 06.40 +31 35 17.0 V V37
2021-07-08 10:51:45 C 02 20 15.40 +31 31 07.0 V V37
2021-07-09 10:05:23 C 02 41 46.90 +20 37 11.1 V V37
2021-07-09 10:08:31 C 02 41 49.58 +20 35 40.9 V V37
2021-07-09 10:11:41 C 02 41 52.28 +20 34 09.7 V V37
2021-07-09 10:14:52 C 02 41 54.97 +20 32 38.6 V V37
2021-07-10 03:43:58 C 02 56 18.27 +12 07 55.4 V G40
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)