IAA RAS IAA Minor Planet Database

16834 (1997 WU22)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4421590203 ± 5.06e-09
Semi-major axis (a)1.4679035853 AU ± 1.60e-10
Inclination (i)15.99741496° ± 7.43e-07
Long. of Asc. Node (Ω)260.74744858° ± 2.68e-06
Arg. of Perihelion (ω)334.40245930° ± 2.68e-06
Mean Anomaly (M)109.14249919° ± 9.50e-07
Mean Motion (n)0.5541993082°/day ± 9.06e-11
Perihelion dist (q)0.81885677 AU ± 7.42e-09
Aphelion dist (Q)2.11695040 AU ± 7.42e-09
Orbital Period1.77846899 yr ± 2.91e-10
Physical Parameters
H (abs. magnitude)15.75
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.237″
Uncertainty0
Orbit TypeApollo
MOID0.147093 AU
Observations Used4437
Radar Obs Used1
Gaia Obs Used67
Oppositions12
Arc Total1988-2025
First Observation Used1988-10-08
Last Observation Used2025-12-16
Observations (4859)
Date Type RA Dec Mag Band Observatory
2020-12-09 09:07:58 C 02 33 37.50 +26 03 27.8 – o 691
2020-12-09 09:16:33 C 02 33 37.12 +26 03 22.2 – o 691
2020-12-12 08:27:27 C 02 30 50.03 +25 19 20.1 – V T05
2020-12-12 08:32:43 C 02 30 49.83 +25 19 17.3 – V T05
2020-12-12 08:42:05 C 02 30 49.48 +25 19 11.5 – V T05
2020-12-12 09:04:06 C 02 30 48.63 +25 18 58.2 – V T05
2020-12-14 05:53:01 C 02 29 16.35 +24 52 05.3 – V 703
2020-12-14 06:01:17 C 02 29 16.14 +24 52 00.3 – V 703
2020-12-14 06:09:32 C 02 29 15.90 +24 51 54.4 – V 703
2020-12-14 06:17:47 C 02 29 15.54 +24 51 49.9 – V 703
2020-12-14 07:58:18 C 02 29 12.40 +24 50 53.2 – V T08
2020-12-14 08:02:57 C 02 29 12.27 +24 50 50.2 – V T08
2020-12-14 08:25:51 C 02 29 11.49 +24 50 36.2 – V T08
2020-12-14 08:35:50 C 02 29 11.19 +24 50 30.5 – V T08
2020-12-16 03:54:31 C 02 27 52.34 +24 25 18.8 – V G96
2020-12-16 04:02:10 C 02 27 52.11 +24 25 14.5 – V G96
2020-12-16 04:09:45 C 02 27 51.88 +24 25 10.1 – V G96
2020-12-16 04:17:23 C 02 27 51.64 +24 25 05.8 – V G96
2020-12-18 05:38:45 C 02 26 32.95 +23 57 22.5 – V 703
2020-12-18 05:45:10 C 02 26 32.75 +23 57 19.4 – V 703
2020-12-18 05:51:35 C 02 26 32.60 +23 57 15.4 – V 703
2020-12-18 05:58:00 C 02 26 32.44 +23 57 11.7 – V 703
2020-12-21 04:43:31 C 02 25 00.66 +23 19 23.8 – V 703
2020-12-21 05:00:00 C 02 25 00.54 +23 19 13.1 – V 703
2020-12-21 05:08:15 C 02 25 00.38 +23 19 09.4 – V 703
2020-12-22 06:55:43 C 02 24 33.05 +23 05 59.2 – V T08
2020-12-22 07:00:21 C 02 24 33.04 +23 05 56.8 – V T08
2020-12-22 07:15:03 C 02 24 32.74 +23 05 49.7 – V T08
2020-12-22 07:25:24 C 02 24 32.58 +23 05 43.8 – V T08
2021-01-03 07:58:29 C 02 22 50.25 +21 00 32.1 – V T08
2021-01-03 08:06:28 C 02 22 50.31 +21 00 28.8 – V T08
2021-01-03 08:14:28 C 02 22 50.32 +21 00 25.8 – V T08
2021-01-03 08:35:49 C 02 22 50.34 +21 00 17.7 – V T08
2021-01-05 07:14:00 C 02 23 06.60 +20 43 56.6 – V T05
2021-01-05 07:23:56 C 02 23 06.59 +20 43 54.2 – V T05
2021-01-05 07:33:16 C 02 23 06.69 +20 43 50.7 – V T05
2021-01-05 07:49:15 C 02 23 06.73 +20 43 44.7 – V T05
2021-01-06 04:37:16 C 02 23 16.71 +20 36 46.8 – U I41
2021-01-06 05:36:41 C 02 23 17.14 +20 36 26.9 – U I41
2021-01-06 07:50:59 C 02 23 18.332 +20 35 44.28 – U F52
2021-01-06 08:10:15 C 02 23 18.472 +20 35 37.88 – U F52
2021-01-06 08:48:47 C 02 23 18.762 +20 35 25.07 – U F52
2021-01-09 04:21:06 C 02 24 03.17 +20 14 23.6 – V G96
2021-01-09 04:28:33 C 02 24 03.26 +20 14 21.4 – V G96
2021-01-09 04:36:01 C 02 24 03.35 +20 14 19.2 – V G96
2021-01-09 04:43:27 C 02 24 03.44 +20 14 17.0 – V G96
2021-01-10 04:29:21 C 02 24 23.01 +20 07 24.1 – U I41
2021-01-10 05:13:43 C 02 24 23.60 +20 07 11.4 – U I41
2021-01-11 06:48:40 C 02 24 46.987 +20 00 06.40 – U F51
2021-01-11 07:06:14 C 02 24 47.241 +20 00 01.60 – U F51
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2000-07-22 21:46:00 226599087.9 12 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)