21374 (1997 WS22)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.1207067223 ± 5.62e-09
Semi-major axis (a)1.2694768683 AU ± 2.72e-10
Inclination (i)23.97969173° ± 1.57e-06
Long. of Asc. Node (Ω)59.19048102° ± 1.05e-06
Arg. of Perihelion (ω)197.34514071° ± 3.61e-06
Mean Anomaly (M)4.82548646° ± 2.86e-06
Mean Motion (n)0.6890886369°/day ± 2.21e-10
Perihelion dist (q)1.11624248 AU ± 7.13e-09
Aphelion dist (Q)1.42271126 AU ± 7.14e-09
Orbital Period1.43033310 yr ± 4.59e-10
Physical Parameters
H (abs. magnitude)17.45
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.252″
Uncertainty0
Orbit TypeAmor
MOID0.108428 AU
Observations Used2054
Radar Obs Used1
Gaia Obs Used44
Oppositions13
Arc Total1974-2025
First Observation Used1974-09-22
Last Observation Used2025-02-22
Observations (2303)
Date Type RA Dec Mag Band Observatory
2007-12-27 20:48:59 C 02 05 27.49 +29 09 01.0 c A24
2007-12-27 21:05:30 C 02 05 27.15 +29 09 12.4 c A24
2007-12-27 21:20:34 C 02 05 26.81 +29 09 23.2 c A24
2007-12-27 21:22:01 C 02 05 26.81 +29 09 23.4 c A24
2007-12-28 19:18:40 C 02 05 05.39 +29 24 41.3 c A24
2007-12-28 19:20:17 C 02 05 05.37 +29 24 42.2 c A24
2007-12-28 19:35:28 C 02 05 05.09 +29 24 52.7 c A24
2007-12-28 19:52:13 C 02 05 04.79 +29 25 04.0 c A24
2007-12-28 20:07:27 C 02 05 04.52 +29 25 14.9 c A24
2007-12-28 20:08:54 C 02 05 04.46 +29 25 15.4 c A24
2007-12-31 03:32:11 C 02 04 27.23 +30 02 54.7 o 699
2007-12-31 04:06:30 C 02 04 26.83 +30 03 18.0 o 699
2007-12-31 04:40:48 C 02 04 26.49 +30 03 40.5 o 699
2007-12-31 05:15:09 C 02 04 26.09 +30 04 02.5 o 699
2008-01-13 01:57:25 C 02 07 47.42 +33 15 54.8 18.9 c 704
2008-01-13 02:16:49 C 02 07 47.89 +33 16 06.3 18.9 c 704
2008-01-13 02:35:54 C 02 07 48.34 +33 16 16.9 19.2 c 704
2008-01-13 02:54:35 C 02 07 48.87 +33 16 29.4 19.3 c 704
2008-01-13 03:13:12 C 02 07 49.26 +33 16 38.9 18.8 c 704
2008-01-13 04:23:33 C 02 07 51.06 +33 17 20.1 r 703
2008-01-13 04:29:45 C 02 07 51.13 +33 17 25.0 r 703
2008-01-13 04:35:59 C 02 07 51.31 +33 17 27.4 r 703
2008-01-13 04:42:09 C 02 07 51.45 +33 17 30.8 r 703
2010-10-07 11:39:10 C 07 02 42.39 +22 47 28.2 o 691
2010-10-07 12:02:26 C 07 02 44.46 +22 47 44.0 o 691
2010-10-09 10:38:53 C 07 06 57.45 +23 18 46.1 o 691
2010-10-09 10:58:06 C 07 06 59.13 +23 18 59.5 o 691
2010-10-09 11:17:20 C 07 07 00.85 +23 19 12.3 o 691
2010-10-15 10:34:20 C 07 19 51.79 +25 00 22.1 19.7 c 704
2010-10-15 10:54:16 C 07 19 53.56 +25 00 35.6 19.7 c 704
2010-10-15 11:14:13 C 07 19 55.29 +25 00 51.6 20.0 c 704
2010-10-31 10:46:12 C 07 53 26.55 +30 26 35.0 r 703
2010-10-31 10:56:02 C 07 53 27.38 +30 26 45.3 r 703
2010-10-31 11:16:01 C 07 53 29.07 +30 27 04.7 r 703
2010-11-07 11:08:53 C 08 07 36.80 +33 22 48.6 r 703
2010-11-07 11:18:55 C 08 07 37.52 +33 22 59.6 r 703
2010-11-07 11:28:52 C 08 07 38.31 +33 23 12.1 r 703
2010-11-10 09:52:11 C 08 13 25.64 +34 44 08.0 r 703
2010-11-10 09:59:40 C 08 13 26.25 +34 44 17.4 r 703
2010-11-10 10:07:07 C 08 13 26.86 +34 44 26.3 r 703
2010-11-10 10:14:37 C 08 13 27.37 +34 44 35.1 r 703
2010-12-13 10:36:39 C 09 07 37.81 +55 15 58.8 r 703
2010-12-13 10:43:14 C 09 07 38.06 +55 16 10.7 r 703
2010-12-13 10:49:54 C 09 07 38.38 +55 16 23.2 r 703
2010-12-13 10:56:36 C 09 07 38.67 +55 16 35.6 r 703
2011-02-04 21:59:36 C 06 30 06.70 +79 37 04.4 c A24
2011-02-04 22:00:59 C 06 30 06.15 +79 37 04.7 c A24
2011-02-04 22:44:17 C 06 29 56.76 +79 36 53.1 c A24
2011-02-04 22:45:40 C 06 29 56.74 +79 36 53.9 c A24
2011-02-04 23:54:57 C 06 29 42.01 +79 36 37.3 c A24
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2014-05-07 07:45:00 163222542.36 4 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)