161989 Cacus (1978 CA)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2138350261 ± 2.00e+00
Semi-major axis (a)1.1226790934 AU ± 3.00e+00
Inclination (i)26.06541983° ± 4.00e+00
Long. of Asc. Node (Ω)161.20351445° ± 5.00e+00
Arg. of Perihelion (ω)102.10980322° ± 6.00e+00
Mean Anomaly (M)310.21565023° ± 4.33e-05
Mean Motion (n)0.8285692722°/day ± 3.32e+00
Perihelion dist (q)0.88261098 AU ± 3.26e+00
Aphelion dist (Q)1.36274721 AU ± 4.28e+00
Orbital Period1.18955206 yr ± 4.77e+00
NGA Modelr2
A2-2.41214999e-06 AU/d²
Physical Parameters
H (abs. magnitude)17.31
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.462″
Uncertainty0
Orbit TypeApollo
MOID0.013416 AU
Observations Used1566
Gaia Obs Used117
Oppositions6
Arc Total1978-2017
First Observation Used1978-02-08
Last Observation Used2023-01-28
Observations (1813)
Date Type RA Dec Mag Band Observatory
2022-11-29 02:31:22 C 01 22 28.085 -47 24 30.10 V W68
2022-11-29 02:39:11 C 01 22 28.337 -47 24 22.97 V W68
2022-11-29 02:54:46 C 01 22 28.702 -47 24 06.66 V W68
2022-11-30 20:12:41 C 01 23 45.986 -46 42 36.50 V M22
2022-11-30 20:17:14 C 01 23 46.118 -46 42 32.58 V M22
2022-11-30 20:25:43 C 01 23 46.382 -46 42 23.76 V M22
2022-11-30 20:40:10 C 01 23 46.786 -46 42 08.86 V M22
2022-12-03 06:44:11 C 01 25 44.491 -45 43 03.97 U F51
2022-12-03 06:55:20 C 01 25 44.826 -45 42 52.36 U F51
2022-12-03 07:06:45 C 01 25 45.183 -45 42 40.64 U F51
2022-12-03 07:38:14 C 01 25 46.127 -45 42 08.30 U F51
2022-12-04 20:42:40 C 01 27 05.928 -45 03 39.49 V M22
2022-12-04 20:47:27 C 01 27 06.072 -45 03 35.24 V M22
2022-12-04 20:56:03 C 01 27 06.358 -45 03 26.42 V M22
2022-12-04 21:11:08 C 01 27 07.001 -45 03 09.58 V M22
2022-12-08 20:01:22 C 01 30 48.924 -43 23 30.12 V M22
2022-12-08 20:05:55 C 01 30 49.104 -43 23 25.26 V M22
2022-12-08 20:13:46 C 01 30 49.358 -43 23 17.30 V M22
2022-12-08 20:29:26 C 01 30 50.023 -43 23 00.24 V M22
2022-12-11 01:55:44 C 01 33 05.086 -42 25 54.01 V W68
2022-12-11 02:00:09 C 01 33 05.134 -42 25 48.18 V W68
2022-12-11 02:04:05 C 01 33 05.306 -42 25 44.90 V W68
2022-12-11 02:08:43 C 01 33 05.585 -42 25 39.79 V W68
2022-12-11 02:09:21 C 01 33 05.539 -42 25 38.75 V W68
2022-12-11 02:17:50 C 01 33 05.861 -42 25 28.88 V W68
2022-12-11 02:23:42 C 01 33 06.185 -42 25 23.77 V W68
2022-12-11 02:32:10 C 01 33 06.502 -42 25 14.48 V W68
2022-12-15 02:12:14 C 01 37 24.960 -40 41 23.89 V W68
2022-12-15 02:16:23 C 01 37 25.159 -40 41 19.28 V W68
2022-12-15 02:25:35 C 01 37 25.514 -40 41 08.34 V W68
2022-12-15 02:40:10 C 01 37 26.153 -40 40 53.11 V W68
2022-12-19 01:48:30 C 01 42 03.367 -38 55 47.50 V W68
2022-12-19 01:53:06 C 01 42 03.648 -38 55 41.52 V W68
2022-12-19 02:02:12 C 01 42 04.051 -38 55 32.34 V W68
2022-12-19 02:16:34 C 01 42 04.716 -38 55 15.96 V W68
2022-12-20 19:41:10 C 01 44 11.378 -38 08 59.89 V M22
2022-12-20 19:45:16 C 01 44 11.640 -38 08 56.22 V M22
2022-12-20 19:52:49 C 01 44 11.983 -38 08 47.04 V M22
2022-12-20 20:07:10 C 01 44 12.655 -38 08 30.70 V M22
2022-12-21 19:59:16 C 01 45 27.278 -37 41 43.37 V M22
2022-12-21 20:07:10 C 01 45 27.677 -37 41 33.83 V M22
2022-12-21 20:16:23 C 01 45 28.142 -37 41 23.39 V M22
2022-12-21 20:30:58 C 01 45 28.819 -37 41 07.91 V M22
2022-12-22 19:25:42 C 01 46 41.654 -37 15 19.19 V M22
2022-12-22 19:30:25 C 01 46 41.930 -37 15 13.46 V M22
2022-12-22 19:38:21 C 01 46 42.391 -37 15 04.07 V M22
2022-12-22 19:52:30 C 01 46 43.006 -37 14 48.26 V M22
2022-12-26 19:21:07 C 01 51 57.101 -35 26 27.60 V M22
2022-12-26 19:28:29 C 01 51 57.542 -35 26 19.32 V M22
2022-12-26 19:33:43 C 01 51 57.842 -35 26 12.52 V M22
Radar Observations (5)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2022-08-24 07:20:00 86764067 10 us 8560 -14 -14
2022-08-24 07:50:00 86635720.898 1 us 8560 -14 -14
2022-08-26 12:30:00 74230837 1 us 8560 -14 -14
2022-08-29 09:30:00 62078989.8 1 us 8560 -14 -14
2022-09-02 11:40:00 58224907.73 1.5 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)