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
1997-12-25 11:37:57 C 03 30 53.96 +22 59 28.5 z 402
1997-12-31 18:20:15 C 03 25 05.38 +21 43 14.8 046
1997-12-31 18:25:16 C 03 25 05.21 +21 43 12.8 046
1997-12-31 18:32:43 C 03 25 04.93 +21 43 09.0 046
1998-01-03 05:09:04 C 03 23 21.17 +21 15 56.5 z 711
1998-01-03 05:23:39 C 03 23 20.75 +21 15 50.0 z 711
1998-01-06 18:19:27 C 03 21 22.67 +20 38 57.2 z 118
1998-01-06 18:24:29 C 03 21 22.58 +20 38 55.2 z 118
1998-01-10 18:35:15 C 03 19 52.02 +20 01 05.3 557
1998-01-10 18:52:24 C 03 19 51.80 +20 00 59.4 557
1998-01-10 19:01:25 C 03 19 51.71 +20 00 56.1 046
1998-01-10 19:07:03 C 03 19 51.64 +20 00 54.2 046
1998-01-10 19:14:01 C 03 19 51.55 +20 00 51.7 046
1998-01-12 20:18:04 C 03 19 22.55 +19 43 11.3 046
1998-01-12 20:23:40 C 03 19 22.50 +19 43 09.3 046
1998-01-12 20:26:57 C 03 19 22.50 +19 43 09.1 046
1998-01-27 11:56:30 C 03 21 04.41 +18 07 16.1 360
1998-01-27 12:05:30 C 03 21 04.55 +18 07 14.2 360
1998-01-27 12:12:29 C 03 21 04.65 +18 07 12.8 360
1998-02-01 18:13:48 C 03 23 39.89 +17 44 45.6 046
1998-02-01 18:16:35 C 03 23 39.95 +17 44 44.6 046
1998-02-01 18:19:14 C 03 23 40.01 +17 44 44.5 046
1998-02-03 06:07:34 C 03 24 33.92 +17 39 23.9 z 711
1998-02-03 06:26:41 C 03 24 34.34 +17 39 20.5 z 711
1998-02-04 05:34:31 C 03 25 11.77 +17 36 07.0 z 711
1998-02-05 05:51:56 C 03 25 52.76 +17 32 53.5 z 711
1998-02-06 05:32:37 C 03 26 34.66 +17 29 55.8 z 711
1998-02-06 05:52:05 C 03 26 35.01 +17 29 52.7 z 711
1998-02-21 19:29:14 C 03 41 09.59 +17 02 15.0 557
1998-02-21 19:42:53 C 03 41 10.32 +17 02 14.3 557
1998-02-22 12:31:52 C 03 41 58.05 +17 01 43.7 327
1998-02-22 12:43:12 C 03 41 58.68 +17 01 42.7 19.3 327
1998-02-22 12:54:23 C 03 41 59.19 +17 01 42.5 327
1998-03-22 10:55:30 C 04 22 04.28 +17 04 59.0 360
1998-03-22 11:01:30 C 04 22 04.68 +17 04 59.2 360
1998-03-22 11:06:59 C 04 22 05.09 +17 04 58.8 360
1999-10-20 03:02:47 C 07 10 19.58 +23 58 32.0 557
1999-10-20 03:11:05 C 07 10 19.85 +23 58 29.4 557
1999-10-20 19:24:08 C 07 10 54.27 +23 54 13.3 z 402
1999-10-20 19:27:46 C 07 10 54.47 +23 54 12.5 z 402
1999-10-20 19:31:41 C 07 10 54.53 +23 54 11.7 z 402
1999-10-22 10:09:04 C 07 12 13.86 +23 43 50.8 19.1 a 704
1999-10-22 10:27:39 C 07 12 14.42 +23 43 45.8 19.3 a 704
1999-10-22 11:04:29 C 07 12 15.57 +23 43 36.7 19.4 a 704
1999-10-24 18:49:53 C 07 14 02.23 +23 28 19.9 z 402
1999-10-24 18:53:13 C 07 14 02.28 +23 28 18.5 z 402
1999-10-24 18:56:32 C 07 14 02.41 +23 28 17.7 z 402
1999-11-05 11:29:23 C 07 20 27.59 +22 05 24.6 z 711
1999-11-05 11:48:00 C 07 20 27.82 +22 05 18.7 z 711
1999-11-16 03:25:14 C 07 21 53.14 +20 40 18.2 c 118
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)