161999 (1989 RC)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5125695443 ± 5.62e-08
Semi-major axis (a)2.3176256527 AU ± 6.85e-09
Inclination (i)7.37873890° ± 4.48e-06
Long. of Asc. Node (Ω)140.08449359° ± 4.64e-05
Arg. of Perihelion (ω)181.50747081° ± 4.83e-05
Mean Anomaly (M)109.10555186° ± 2.20e-05
Mean Motion (n)0.2793491423°/day ± 1.24e-09
Perihelion dist (q)1.12968133 AU ± 1.30e-07
Aphelion dist (Q)3.50556998 AU ± 1.31e-07
Orbital Period3.52829536 yr ± 1.56e-08
Physical Parameters
H (abs. magnitude)18.80
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.372″
Uncertainty0
Orbit TypeAmor
MOID0.114804 AU
Observations Used139
Oppositions25
Arc Total1989-2024
First Observation Used1989-08-09
Last Observation Used2024-06-05
Observations (156)
Date Type RA Dec Mag Band Observatory
1989-08-09 08:44:30 A 22 19 10.89 -08 05 45.5 14.0 675
1989-08-09 09:30:15 A 22 19 23.37 -08 07 00.2 675
1989-09-05 09:20:59 A 00 36 32.89 -19 35 53.9 16.0 675
1989-09-05 10:03:44 A 00 36 36.98 -19 36 09.8 675
1989-09-07 08:22:30 A 00 41 26.34 -19 53 32.5 675
1989-09-07 08:59:45 A 00 41 29.63 -19 53 44.9 675
1989-09-21 12:30:33 A 01 02 40.14 -20 33 05.8 413
1989-09-21 13:14:28 A 01 02 41.41 -20 33 04.4 413
1989-09-22 12:24:44 A 01 03 27.25 -20 31 10.5 413
1989-09-22 13:55:43 A 01 03 28.48 -20 30 55.4 18.0 474
1989-09-22 14:19:13 A 01 03 28.97 -20 30 53.4 474
1989-09-26 16:00:21 A 01 05 59.71 -20 17 27.1 413
1989-11-28 05:38:44 A 01 28 12.93 -06 53 23.3 688
1989-11-29 03:26:29 A 01 28 56.80 -06 39 18.3 688
1989-11-29 03:33:29 A 01 28 56.96 -06 39 12.6 688
1989-11-29 03:43:35 A 01 28 57.27 -06 39 07.3 688
1996-03-27 17:28:31 C 16 16 30.71 -09 27 30.0 413
1996-03-27 17:35:39 C 16 16 31.05 -09 27 28.8 413
1996-05-21 23:15:06 C 16 20 32.60 -00 58 35.5 z 557
1996-05-21 23:32:42 C 16 20 31.91 -00 58 28.9 z 557
1996-05-22 23:30:08 C 16 19 39.30 -00 48 15.5 z 557
1996-05-22 23:34:50 C 16 19 39.07 -00 48 13.4 z 557
1996-05-22 23:39:09 C 16 19 38.90 -00 48 11.2 z 557
1996-05-22 23:43:33 C 16 19 38.76 -00 48 09.2 z 557
1996-05-27 05:49:10 C 16 15 37.00 -00 06 50.5 i 711
1996-05-27 06:06:13 C 16 15 36.29 -00 06 44.2 i 711
1996-05-28 07:44:17 C 16 14 31.06 +00 02 55.5 i 711
1996-05-28 08:06:31 C 16 14 29.90 +00 03 04.9 i 711
1996-05-28 15:47:33 C 16 14 10.14 +00 06 11.4 413
1996-05-28 15:51:21 C 16 14 09.97 +00 06 12.6 413
1996-06-06 05:27:36 C 16 04 50.01 +01 08 55.2 z 684
1996-06-06 05:47:37 C 16 04 48.95 +01 08 59.9 z 684
1996-06-06 05:55:33 C 16 04 48.53 +01 09 02.2 z 684
1996-06-07 12:38:38 C 16 03 21.54 +01 16 16.7 413
1996-06-08 11:07:41 C 16 02 18.23 +01 20 51.8 413
1996-06-08 11:12:14 C 16 02 17.99 +01 20 52.6 413
1996-06-09 14:44:42 C 16 00 59.06 +01 25 55.0 413
1996-06-09 14:47:53 C 16 00 58.87 +01 25 54.8 413
1996-06-10 22:00:20 C 15 59 31.62 +01 30 26.7 z 587
1996-06-10 22:12:39 C 15 59 30.99 +01 30 29.1 z 587
1996-06-14 23:52:43 C 15 55 02.10 +01 40 06.0 z 118
1996-06-14 23:59:01 C 15 55 01.83 +01 40 06.7 z 118
1996-06-15 13:44:15 C 15 54 25.82 +01 40 46.7 z 360
1996-06-15 14:00:44 C 15 54 24.98 +01 40 47.3 z 360
1996-06-15 14:12:45 C 15 54 24.37 +01 40 47.8 z 360
1996-06-15 21:02:15 C 15 54 06.37 +01 40 58.2 z 121
1996-06-15 21:06:15 C 15 54 06.17 +01 40 58.3 z 121
1996-06-15 21:14:44 C 15 54 05.86 +01 40 57.7 z 121
1996-06-18 00:48:17 C 15 51 52.91 +01 41 12.7 z 118
1996-06-21 11:29:13 C 15 48 37.16 +01 36 18.2 413