4660 Nereus (1982 DB)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar

Orbital Elements

Epoch (TDB)	2025-11-21 (JD 2461000.5)
Eccentricity (e)	0.3587886891 ± 2.00e+00
Semi-major axis (a)	1.4849968052 AU ± 3.00e+00
Inclination (i)	1.45355249° ± 4.00e+00
Long. of Asc. Node (Ω)	313.11069488° ± 5.00e+00
Arg. of Perihelion (ω)	159.53855352° ± 6.00e+00
Mean Anomaly (M)	49.81856302° ± 6.30e-04
Mean Motion (n)	0.5446581382°/day ± 1.65e+00
Perihelion dist (q)	0.95219675 AU ± 3.54e+00
Aphelion dist (Q)	2.01779686 AU ± 5.04e+00
Orbital Period	1.80962371 yr ± 5.48e+00
NGA Model	r2
A2	-4.68169994e-04 AU/d²

Physical Parameters

H (abs. magnitude)	18.75
G (slope)	0.15

Orbit Solution

Source	IAA
Solution Date	2026-04-26
RMS Residual	4.495″
Uncertainty	0
Orbit Type	Apollo
MOID	0.004051 AU
Observations Used	4486
Radar Obs Used	28
Oppositions	9
Arc Total	1981-2002
First Observation Used	1990-09-16
Last Observation Used	2024-01-02

Observations (7063)

Date	Type	RA	Dec	Mag	Band	Observatory
2021-12-03 17:20:43	C	04 28 34.09	+56 52 24.3	–	V	C40
2021-12-03 17:21:55	C	04 28 34.90	+56 52 33.4	–	V	C40
2021-12-03 17:23:08	C	04 28 35.70	+56 52 42.6	–	V	C40
2021-12-03 17:24:20	C	04 28 36.50	+56 52 51.9	–	V	C40
2021-12-03 17:25:33	C	04 28 37.30	+56 53 01.0	–	V	C40
2021-12-03 17:26:45	C	04 28 38.10	+56 53 10.2	–	V	C40
2021-12-03 17:29:11	C	04 28 39.71	+56 53 28.6	–	V	C40
2021-12-03 17:30:22	C	04 28 40.51	+56 53 37.8	–	V	C40
2021-12-03 17:31:36	C	04 28 41.32	+56 53 47.1	–	V	C40
2021-12-03 17:32:47	C	04 28 42.11	+56 53 56.2	–	V	C40
2021-12-03 17:35:13	C	04 28 43.72	+56 54 14.5	–	V	C40
2021-12-03 17:36:24	C	04 28 44.51	+56 54 23.7	–	V	C40
2021-12-03 17:37:38	C	04 28 45.32	+56 54 33.0	–	V	C40
2021-12-03 17:38:49	C	04 28 46.11	+56 54 42.0	–	V	C40
2021-12-03 17:40:03	C	04 28 46.91	+56 54 51.2	–	V	C40
2021-12-03 17:41:15	C	04 28 47.70	+56 55 00.4	–	V	C40
2021-12-03 17:42:27	C	04 28 48.52	+56 55 09.8	–	V	C40
2021-12-03 17:43:40	C	04 28 49.31	+56 55 18.9	–	V	C40
2021-12-03 17:44:52	C	04 28 50.10	+56 55 28.0	–	V	C40
2021-12-03 17:46:05	C	04 28 50.91	+56 55 37.2	–	V	C40
2021-12-03 17:47:17	C	04 28 51.70	+56 55 46.3	–	V	C40
2021-12-03 17:47:55	C	04 28 51.23	+56 57 23.0	–	V	M44
2021-12-03 17:48:29	C	04 28 52.51	+56 55 55.5	–	V	C40
2021-12-03 17:49:43	C	04 28 53.30	+56 56 04.7	–	V	C40
2021-12-03 17:50:54	C	04 28 54.10	+56 56 13.8	–	V	C40
2021-12-03 17:52:07	C	04 28 54.89	+56 56 22.9	–	V	C40
2021-12-03 17:53:19	C	04 28 55.69	+56 56 32.1	–	V	C40
2021-12-03 17:54:31	C	04 28 56.49	+56 56 41.3	–	V	C40
2021-12-03 17:55:45	C	04 28 57.28	+56 56 50.4	–	V	C40
2021-12-03 17:56:56	C	04 28 58.08	+56 56 59.6	–	V	C40
2021-12-03 18:00:35	C	04 28 59.03	+56 58 57.4	–	V	M44
2021-12-03 18:06:32	C	04 29 04.39	+56 58 12.2	–	V	C40
2021-12-03 18:07:44	C	04 29 05.19	+56 58 21.3	–	V	C40
2021-12-03 18:08:57	C	04 29 05.98	+56 58 30.4	–	V	C40
2021-12-03 18:10:09	C	04 29 06.78	+56 58 39.6	–	V	C40
2021-12-03 18:11:21	C	04 29 07.57	+56 58 48.7	–	V	C40
2021-12-03 18:12:35	C	04 29 08.37	+56 58 57.8	–	V	C40
2021-12-03 18:13:46	C	04 29 09.16	+56 59 06.9	–	V	C40
2021-12-03 18:14:02	C	04 29 07.18	+57 00 38.1	–	V	M44
2021-12-03 18:14:59	C	04 29 09.97	+56 59 16.0	–	V	C40
2021-12-03 18:16:12	C	04 29 10.75	+56 59 25.3	–	V	C40
2021-12-03 18:17:23	C	04 29 11.55	+56 59 34.3	–	V	C40
2021-12-03 18:18:37	C	04 29 12.33	+56 59 43.4	–	V	C40
2021-12-03 18:19:48	C	04 29 13.13	+56 59 52.5	–	V	C40
2021-12-03 18:21:02	C	04 29 13.92	+57 00 01.7	–	V	C40
2021-12-03 18:22:14	C	04 29 14.72	+57 00 10.7	–	V	C40
2021-12-03 18:23:26	C	04 29 15.51	+57 00 20.0	–	V	C40
2021-12-03 18:24:39	C	04 29 16.31	+57 00 29.0	–	V	C40
2021-12-03 18:25:51	C	04 29 17.09	+57 00 38.0	–	V	C40
2021-12-03 18:27:04	C	04 29 17.89	+57 00 47.3	–	V	C40

« Prev 1 2 … 125 126 127 … 141 142 Next » 7063 observations

Radar Observations (65)

Epoch (UTC)	Value	Sigma	Units	Freq (MHz)	Receiver	Transmitter
2001-12-18.903472	108380755	10	us	2380	251	251
2001-12-20 22:54:00	103240786.97	0.5	us	2380	-1	-1
2001-12-20 22:54:00	68384.732	0.05	Hz	2380	-1	-1
2001-12-20.953472	1032425114	40	us	2380	251	251
2001-12-20.954167	10324078697	500	us	2380	251	251
2002-01-09 19:59:00	49784606.55	0.2	us	2380	-1	-1
2002-01-09 19:59:00	70245.997	0.04	Hz	2380	-1	-1
2002-01-09.781944	499160290	40	us	2380	251	251
2002-01-09.832639	4978460655	200	us	2380	251	251
2002-01-10 19:43:00	47273046.72	0.2	us	2380	-1	-1
2002-01-10 19:43:00	68613.43	0.04	Hz	2380	-1	-1
2002-01-10.818750	472799725	15	us	2380	251	251
2002-01-10.821528	4727304672	200	us	2380	251	251
2002-01-11 19:25:00	44835004.39	0.2	us	2380	-1	-1
2002-01-11 19:25:00	66627.953	0.04	Hz	2380	-1	-1
2002-01-11.770833	6841778	20	Hz	2380	251	251
2002-01-11.775000	4491829868	150	us	2380	251	251
2002-01-11.809028	4483500439	200	us	2380	251	251
2002-01-12 19:28:00	42448308.76	0.2	us	2380	-1	-1
2002-01-12 19:28:00	63457.452	0.04	Hz	2380	-1	-1
2002-01-12.811111	4244830876	200	us	2380	251	251
2002-01-13 18:30:00	40261557.21	0.2	us	2380	-1	-1
2002-01-13 18:30:00	61739.104	0.04	Hz	2380	-1	-1
2002-01-13.770833	4026155721	200	us	2380	251	251
2002-01-15 20:00:00	35994854.28	0.125	us	8560	-14	-14
2002-01-15 20:00:00	197405.524	0.25	Hz	8560	-14	-14
2002-01-15.770833	361220880	10	us	8560	253	253
2002-01-15.833333	3599485428	125	us	8560	253	253
2002-01-18 22:10:00	31139422.22	0.125	us	8560	-14	-14
2002-01-18 22:10:00	107757.4	0.25	Hz	8560	-14	-14
2002-01-18.833333	312442756	5	us	8560	253	253
2002-01-18.923611	3113942222	125	us	8560	253	253
2002-01-19 20:00:00	30181330.16	0.125	us	8560	-14	-14
2002-01-19 20:00:00	90610.817	0.125	Hz	8560	-14	-14
2002-01-19.000000	3106051265	50	us	8560	253	253
2002-01-19.729167	3028562883	50	us	8560	253	253
2002-01-19.833333	3018133016	125	us	8560	253	253
2002-01-20 21:20:00	29403320.46	0.125	us	8560	-14	-14
2002-01-20 21:20:00	46520.417	0.125	Hz	8560	-14	-14
2002-01-20.888889	2940332046	125	us	8560	253	253
2002-01-23 17:50:00	29202712.48	0.125	us	8560	-14	-14
2002-01-23 17:50:00	-39949.313	0.125	Hz	8560	-14	-14
2002-01-23.743056	2920271248	125	us	8560	253	253
2002-01-23.819444	292384970	5	us	8560	253	253
2002-01-24 16:20:00	29752549.35	0.125	us	8560	-14	-14
2002-01-24 16:20:00	-64888.574	0.125	Hz	8560	-14	-14
2002-01-24.680556	2975254935	125	us	8560	253	253
2002-01-25 17:50:00	30706982.46	0.125	us	8560	-14	-14
2002-01-25 17:50:00	-107448.878	0.125	Hz	8560	-14	-14
2002-01-25.743056	3070698246	125	us	8560	253	253
2002-01-26 16:30:00	31828818.7	0.125	us	8560	-14	-14
2002-01-26 16:30:00	-127522.95	0.125	Hz	8560	-14	-14
2002-01-26.687500	3182881870	125	us	8560	253	253
2002-01-27 16:50:00	33282611.95	0.125	us	8560	-14	-14
2002-01-27 16:50:00	-155058.598	0.125	Hz	8560	-14	-14
2002-01-27.701389	3328261195	125	us	8560	253	253
2002-01-29 16:50:00	36769265.89	0.125	us	8560	-14	-14
2002-01-29 16:50:00	-194945.298	0.125	Hz	8560	-14	-14
2002-01-29.701389	3676926589	125	us	8560	253	253
2002-01-29.763889	3689491563	50	us	8560	253	253
2021-11-29 08:00:00	53941354.495	2	us	8560	-14	-14
2021-11-30 09:20:00	50332716.46	1	us	8560	-14	-14
2021-12-07 06:20:00	30890699	1	us	8560	-14	-14
2021-12-15 10:00:00	29934898	1	us	8560	-14	-14
2021-12-15 23:10:00	-171136.057	1.15	Hz	7159.45	-47	-43

Station codes

-47 DSS-47 ATCA (W196) -43 DSS-43 Tidbinbilla (70-m) -14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)