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
2021-10-27 16:13:56	S	03 03 01.296	+26 13 41.77	–	V	C57
2021-10-27 16:13:56	s	1 +171496.78	2 +212054.38	2240.0	–	C57
2021-10-27 16:23:56	S	03 03 01.140	+26 13 49.26	–	V	C57
2021-10-27 16:23:56	s	1 +171352.62	1 +212680.28	2010.0	–	C57
2021-10-27 16:24:18	C	03 03 16.19	+25 54 11.6	–	V	C40
2021-10-27 16:33:56	S	03 03 01.039	+26 13 57.04	–	V	C57
2021-10-27 16:33:56	s	1 +171207.32	8 +213304.78	8000.0	–	C57
2021-10-27 16:38:27	C	03 03 16.40	+25 54 21.6	–	V	C40
2021-10-27 16:43:56	S	03 03 00.902	+26 14 03.98	–	V	C57
2021-10-27 16:43:56	s	1 +171060.90	9 +213927.86	240.0	–	C57
2021-10-27 16:46:18	C	03 03 16.54	+25 54 27.2	–	V	C40
2021-10-27 16:53:56	S	03 03 00.866	+26 14 11.26	–	V	C57
2021-10-27 16:53:56	s	1 +170913.36	9 +214549.54	8740.0	–	C57
2021-10-27 17:03:56	S	03 03 00.773	+26 14 18.92	–	V	C57
2021-10-27 17:03:56	s	1 +170764.71	5 +215169.81	3520.0	–	C57
2021-10-27 17:05:21	C	03 03 16.81	+25 54 40.3	–	V	C40
2021-10-27 17:06:56	C	03 03 16.84	+25 54 41.1	–	V	C40
2021-10-27 17:13:56	S	03 03 00.569	+26 14 25.87	–	V	C57
2021-10-27 17:13:56	s	1 +170614.95	0 +215788.68	4600.0	–	C57
2021-10-27 17:17:56	C	03 03 17.00	+25 54 48.9	–	V	C40
2021-10-27 17:21:04	C	03 03 17.04	+25 54 51.1	–	V	C40
2021-10-27 17:22:38	C	03 03 17.07	+25 54 52.3	–	V	C40
2021-10-27 17:23:56	S	03 03 00.528	+26 14 33.72	–	V	C57
2021-10-27 17:23:56	s	1 +170464.08	2 +216406.14	2000.0	–	C57
2021-10-27 17:24:13	C	03 03 17.09	+25 54 53.1	–	V	C40
2021-10-27 17:28:56	C	03 03 17.16	+25 54 56.5	–	V	C40
2021-10-27 17:30:31	C	03 03 17.17	+25 54 57.5	–	V	C40
2021-10-27 17:33:38	C	03 03 17.22	+25 54 59.6	–	V	C40
2021-10-27 17:33:56	S	03 03 00.370	+26 14 40.99	–	V	C57
2021-10-27 17:33:56	s	1 +170312.11	4 +217022.20	5730.0	–	C57
2021-10-27 17:43:56	S	03 03 00.300	+26 14 46.97	–	V	C57
2021-10-27 17:43:56	s	1 +170159.05	3 +217636.86	5820.0	–	C57
2021-10-27 17:45:35	C	03 03 17.38	+25 55 07.8	–	V	C40
2021-10-27 17:50:19	C	03 03 17.45	+25 55 11.2	–	V	C40
2021-10-27 17:51:52	C	03 03 17.47	+25 55 12.3	–	V	C40
2021-10-27 17:53:56	S	03 03 00.175	+26 14 55.39	–	V	C57
2021-10-27 17:53:56	s	1 +170004.90	3 +218250.13	2280.0	–	C57
2021-10-27 17:55:01	C	03 03 17.51	+25 55 14.2	–	V	C40
2021-10-27 17:56:36	C	03 03 17.53	+25 55 15.5	–	V	C40
2021-10-27 17:58:10	C	03 03 17.54	+25 55 16.5	–	V	C40
2021-10-27 17:59:45	C	03 03 17.58	+25 55 17.6	–	V	C40
2021-10-27 18:01:18	C	03 03 17.59	+25 55 18.6	–	V	C40
2021-10-27 18:03:56	S	03 03 00.132	+26 15 02.12	–	V	C57
2021-10-27 18:03:56	s	1 +169849.67	1 +218861.99	5130.0	–	C57
2021-10-27 18:04:27	C	03 03 17.64	+25 55 20.7	–	V	C40
2021-10-27 18:07:36	C	03 03 17.67	+25 55 22.9	–	V	C40
2021-10-27 18:09:10	C	03 03 17.69	+25 55 24.0	–	V	C40
2021-10-27 18:13:56	S	03 02 59.998	+26 15 09.76	–	V	C57
2021-10-27 18:13:56	s	1 +169693.36	0 +219472.47	4380.0	–	C57
2021-10-27 18:23:31	C	03 03 17.87	+25 55 33.8	–	V	C40

« Prev 1 2 … 55 56 57 … 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)