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
2019-08-29 12:16:44	C	21 57 48.887	-11 22 20.45	–	U	F51
2019-08-29 12:18:55	C	21 57 48.723	-11 22 21.18	–	U	F51
2019-08-29 12:38:28	C	21 57 47.238	-11 22 27.80	–	U	F51
2019-08-30 07:19:24	C	21 56 25.26	-11 28 54.6	–	o	691
2019-08-30 07:49:54	C	21 56 22.90	-11 29 04.2	–	o	691
2019-08-30 08:18:23	C	21 56 20.72	-11 29 13.6	–	o	691
2019-08-31 05:56:04	C	21 54 46.307	-11 36 33.38	–	U	F51
2019-08-31 06:00:25	C	21 54 45.976	-11 36 34.86	–	U	F51
2019-08-31 06:02:37	C	21 54 45.813	-11 36 35.66	–	U	F51
2019-08-31 06:17:52	C	21 54 44.663	-11 36 41.05	–	U	F51
2019-08-31 06:22:12	C	21 54 44.326	-11 36 42.57	–	U	F51
2019-08-31 06:24:23	C	21 54 44.186	-11 36 43.15	–	U	F51
2019-08-31 06:39:36	C	21 54 43.031	-11 36 48.56	–	U	F51
2019-08-31 06:43:56	C	21 54 42.709	-11 36 50.03	–	U	F51
2019-08-31 07:01:20	C	21 54 41.391	-11 36 56.04	–	U	F51
2019-08-31 07:07:52	C	21 54 40.895	-11 36 58.24	–	U	F51
2019-08-31 07:27:27	C	21 54 39.409	-11 37 05.00	–	U	F51
2019-08-31 07:29:36	C	21 54 39.252	-11 37 05.69	–	U	F51
2019-08-31 07:49:09	C	21 54 37.759	-11 37 12.50	–	U	F51
2019-08-31 08:10:55	C	21 54 36.109	-11 37 19.96	–	U	F51
2019-08-31 08:13:05	C	21 54 35.938	-11 37 20.56	–	U	F51
2019-08-31 08:32:39	C	21 54 34.455	-11 37 27.38	–	U	F51
2019-08-31 08:34:50	C	21 54 34.287	-11 37 28.13	–	U	F51
2019-08-31 08:54:36	C	21 54 32.765	-11 37 34.96	–	U	F51
2019-08-31 08:56:47	C	21 54 32.615	-11 37 35.62	–	U	F51
2019-08-31 09:16:21	C	21 54 31.123	-11 37 42.27	–	U	F51
2019-08-31 09:18:31	C	21 54 30.947	-11 37 43.04	–	U	F51
2019-08-31 09:38:06	C	21 54 29.460	-11 37 49.68	–	U	F51
2019-08-31 09:40:15	C	21 54 29.299	-11 37 50.40	–	U	F51
2019-08-31 09:59:49	C	21 54 27.819	-11 37 56.98	–	U	F51
2019-09-01 08:36:05	C	21 52 48.814	-11 45 35.19	–	U	F51
2019-09-01 09:19:35	C	21 52 45.505	-11 45 49.87	–	U	F51
2019-09-01 09:41:20	C	21 52 43.845	-11 45 57.25	–	U	F51
2019-09-02 08:44:14	C	21 51 03.333	-11 53 39.97	–	U	F51
2019-09-02 08:46:25	C	21 51 03.170	-11 53 40.67	–	U	F51
2019-09-02 09:06:00	C	21 51 01.678	-11 53 47.29	–	U	F51
2019-09-02 09:08:09	C	21 51 01.523	-11 53 47.96	–	U	F51
2019-09-02 09:27:43	C	21 51 00.037	-11 53 54.57	–	U	F51
2019-09-02 09:29:53	C	21 50 59.870	-11 53 55.23	–	U	F51
2019-09-02 09:49:27	C	21 50 58.398	-11 54 01.79	–	U	F51
2019-09-02 09:51:38	C	21 50 58.226	-11 54 02.46	–	U	F51
2019-09-02 10:13:21	C	21 50 56.587	-11 54 09.66	–	U	F51
2019-09-02 10:32:54	C	21 50 55.113	-11 54 16.14	–	U	F51
2019-09-02 10:35:04	C	21 50 54.948	-11 54 16.83	–	U	F51
2019-09-02 10:54:37	C	21 50 53.471	-11 54 23.30	–	U	F51
2019-09-02 11:16:20	C	21 50 51.837	-11 54 30.42	–	U	F51
2019-09-02 11:18:30	C	21 50 51.680	-11 54 31.06	–	U	F51
2019-09-03 04:54:04	C	21 49 35.75	-12 00 21.2	–	V	703
2019-09-03 05:17:00	C	21 49 34.14	-12 00 31.4	–	V	703
2019-09-04 09:42:02	C	21 47 31.494	-12 09 45.89	–	U	F51

« Prev 1 2 … 12 13 14 … 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)