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
2021-04-29 14:08:08 C 17 56 16.261 +56 25 30.28 V F51
2021-04-29 14:18:33 C 17 56 16.874 +56 25 37.43 V F51
2021-04-29 14:39:22 C 17 56 18.084 +56 25 51.84 V F51
2021-06-02 14:40:26 S 18 47 28.93 +64 14 11.7 L C51
2021-06-02 17:48:46 S 18 47 44.20 +64 15 41.6 L C51
2021-06-02 20:56:53 S 18 47 59.40 +64 17 12.7 L C51
2021-06-03 00:05:12 S 18 48 14.80 +64 18 43.2 L C51
2021-06-03 03:13:20 S 18 48 30.06 +64 20 14.3 L C51
2021-06-03 03:13:32 S 18 48 30.34 +64 20 12.2 L C51
2021-06-03 06:21:39 S 18 48 45.667 +64 21 43.85 L C51
2021-06-03 09:29:58 S 18 49 01.27 +64 23 14.0 L C51
2021-06-03 15:46:26 S 18 49 32.76 +64 26 14.9 L C51
2021-06-03 18:54:34 S 18 49 48.542 +64 27 45.83 L C51
2021-06-04 01:11:01 S 18 50 20.59 +64 30 45.7 L C51
2021-06-04 07:27:27 S 18 50 52.88 +64 33 47.2 L C51
2021-06-04 10:35:47 S 18 51 09.23 +64 35 17.6 L C51
2021-06-04 13:43:55 S 18 51 25.661 +64 36 47.92 L C51
2021-06-04 13:44:06 S 18 51 25.634 +64 36 47.63 L C51
2021-06-04 16:52:14 S 18 51 42.187 +64 38 18.31 L C51
2021-06-04 20:00:33 S 18 51 58.764 +64 39 48.89 L C51
2021-06-04 22:54:01 C 18 52 15.66 +64 41 23.5 V J95
2021-06-04 22:59:35 C 18 52 16.01 +64 41 30.5 V L01
2021-06-04 23:05:52 C 18 52 16.65 +64 41 30.0 V J95
2021-06-04 23:05:57 C 18 52 16.36 +64 41 33.4 V L01
2021-06-04 23:12:20 C 18 52 17.00 +64 41 37.2 V L01
2021-06-04 23:17:43 C 18 52 17.73 +64 41 36.0 V J95
2021-06-04 23:47:59 C 18 52 20.32 +64 41 53.2 V I93
2021-06-04 23:57:36 C 18 52 21.05 +64 41 58.7 V I93
2021-06-05 00:07:57 C 18 52 21.83 +64 42 03.9 V I93
2021-06-05 07:22:26 C 18 53 00.17 +64 45 35.7 u H21
2021-06-05 07:26:27 C 18 53 00.54 +64 45 37.5 u H21
2021-06-05 07:30:53 C 18 53 00.87 +64 45 39.7 u H21
2021-06-05 07:35:35 C 18 53 01.26 +64 45 42.1 u H21
2021-06-06 09:55:29 C 18 55 27.76 +64 58 24.5 V I52
2021-06-06 09:58:49 C 18 55 28.05 +64 58 26.1 V I52
2021-06-07 06:22:42 C 18 57 30.10 +65 08 13.3 V I52
2021-06-07 06:26:02 C 18 57 30.40 +65 08 15.2 V I52
2021-06-07 06:31:19 C 18 57 30.81 +65 08 18.1 V I52
2021-06-10 06:28:00 C 19 05 23.70 +65 43 28.8 V I52
2021-06-10 06:32:32 C 19 05 24.19 +65 43 31.5 V I52
2021-06-10 06:37:04 C 19 05 24.65 +65 43 34.3 V I52
2021-06-12 06:50:26 C 19 11 37.27 +66 07 45.7 V I52
2021-06-12 06:54:37 C 19 11 37.83 +66 07 48.2 V I52
2021-06-12 06:58:49 C 19 11 38.36 +66 07 50.2 V I52
2021-06-12 07:06:29 C 19 11 39.30 +66 07 54.9 V I52
2021-06-14 09:03:10 C 19 19 07.39 +66 33 44.2 V I52
2021-06-14 09:06:11 C 19 19 07.82 +66 33 46.5 V I52
2021-06-14 09:09:13 C 19 19 08.19 +66 33 47.4 V I52
2021-06-14 09:12:14 C 19 19 08.57 +66 33 47.9 V I52
2021-06-16 07:39:25 C 19 27 24.94 +66 58 35.6 V I52
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)