226554 (2003 WR21)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2614415687 ± 5.94e-09
Semi-major axis (a)1.1183165140 AU ± 5.73e-10
Inclination (i)9.26554296° ± 9.76e-07
Long. of Asc. Node (Ω)85.76254611° ± 3.18e-06
Arg. of Perihelion (ω)108.10852916° ± 3.60e-06
Mean Anomaly (M)96.44633593° ± 1.10e-06
Mean Motion (n)0.8334224003°/day ± 6.41e-10
Perihelion dist (q)0.82594209 AU ± 6.66e-09
Aphelion dist (Q)1.41069094 AU ± 6.68e-09
Orbital Period1.18262514 yr ± 9.09e-10
Physical Parameters
H (abs. magnitude)19.62
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.024″
Uncertainty0
Orbit TypeApollo
MOID0.030803 AU
Observations Used461
Radar Obs Used2
Gaia Obs Used21
Oppositions4
Arc Total1990-2023
First Observation Used1990-10-24
Last Observation Used2023-11-11
Observations (507)
Date Type RA Dec Mag Band Observatory
2022-12-21 08:31:44 C 07 49 33.942 +29 43 11.32 V 703
2022-12-21 08:39:27 C 07 49 34.374 +29 43 38.32 V 703
2022-12-21 08:47:09 C 07 49 34.774 +29 44 04.49 V 703
2022-12-21 08:54:53 C 07 49 35.292 +29 44 32.50 V 703
2022-12-23 05:56:12 C 07 53 21.674 +32 33 12.06 V 703
2022-12-23 06:04:00 C 07 53 22.243 +32 33 44.28 V 703
2022-12-23 06:11:49 C 07 53 22.819 +32 34 16.54 V 703
2022-12-23 06:19:38 C 07 53 23.410 +32 34 48.65 V 703
2022-12-23 16:20:55 C 07 54 16.03 +33 15 52.5 V D29
2022-12-23 16:41:17 C 07 54 17.46 +33 17 18.1 V D29
2022-12-23 17:01:39 C 07 54 18.90 +33 18 43.7 V D29
2022-12-26 06:00:43 C 08 00 37.480 +37 57 51.77 V 703
2022-12-26 06:08:27 C 08 00 38.236 +37 58 31.73 V 703
2022-12-26 06:16:11 C 08 00 38.984 +37 59 11.62 V 703
2022-12-26 06:23:56 C 08 00 39.730 +37 59 51.54 V 703
2022-12-28 04:24:56 C 08 06 37.73 +42 08 13.5 q W42
2022-12-28 04:34:33 C 08 06 38.86 +42 09 10.0 q W42
2022-12-29 15:16:26 C 08 12 12.46 +45 38 38.3 q 168
2022-12-29 17:30:54 C 08 12 35.92 +45 53 19.0 q 168
2022-12-29 19:30:42 C 08 12 58.62 +46 06 16.6 X L18
2022-12-29 19:31:30 C 08 12 58.75 +46 06 21.9 X L18
2022-12-29 19:32:19 C 08 12 58.87 +46 06 27.8 X L18
2022-12-29 19:33:08 C 08 12 59.03 +46 06 33.1 X L18
2022-12-29 19:33:48 C 08 12 59.16 +46 06 37.2 X L18
2022-12-29 20:04:58 C 08 13 01.39 +46 10 07.8 q 168
2022-12-29 22:27:01 C 08 13 24.42 +46 25 31.3 q 168
2022-12-30 00:29:54 C 08 13 44.85 +46 38 43.6 q 168
2022-12-30 01:01:19 C 08 13 53.04 +46 42 33.3 o K88
2022-12-30 01:01:41 C 08 13 53.11 +46 42 35.8 o K88
2022-12-30 01:02:03 C 08 13 53.17 +46 42 38.3 o K88
2022-12-30 01:02:26 C 08 13 53.24 +46 42 40.7 o K88
2022-12-30 02:17:00 C 08 14 03.64 +46 50 11.0 q 168
2022-12-30 21:17:02 C 08 18 03.18 +48 58 37.8 o K88
2022-12-30 21:17:24 C 08 18 03.24 +48 58 40.6 o K88
2022-12-30 21:17:47 C 08 18 03.31 +48 58 43.3 o K88
2022-12-30 21:18:09 C 08 18 03.39 +48 58 45.9 o K88
2023-01-01 01:43:33 C 08 24 42.63 +52 22 22.6 V K88
2023-01-01 01:45:39 C 08 24 43.12 +52 22 37.9 V K88
2023-01-01 01:47:43 C 08 24 43.61 +52 22 53.1 V K88
2023-01-01 01:49:47 C 08 24 44.09 +52 23 08.3 V K88
2023-01-01 20:28:22 C 08 30 12.36 +54 43 44.8 X L99
2023-01-01 20:30:32 C 08 30 12.95 +54 44 01.7 X L99
2023-01-01 20:32:37 C 08 30 13.50 +54 44 16.9 X L99
2023-01-01 20:34:37 C 08 30 14.17 +54 44 34.1 X L99
2023-01-04 19:04:15 C 09 01 19.84 +64 20 10.1 V M26
2023-01-04 19:15:12 C 09 01 26.75 +64 21 47.3 V M26
2023-01-08 03:10:09 C 10 31 43.236 +75 15 35.03 V G40
2023-01-08 04:05:39 C 10 33 25.634 +75 22 08.94 V G40
2023-01-08 04:10:09 C 10 33 33.977 +75 22 40.48 V G40
2023-01-08 20:15:44 C 11 10 04.86 +77 04 20.0 V C40
Radar Observations (2)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2017-06-04 12:00:00 13142.192 0.1 Hz 2380 -1 -1
2017-06-04 13:32:00 121966694.32 0.5 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)