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
2021-10-02 14:18:37	C	02 47 16.43	+20 51 47.8	–	V	T08
2021-10-03 08:33:56	C	02 47 57.33	+20 59 35.3	–	V	703
2021-10-03 08:43:35	C	02 47 57.63	+20 59 39.7	–	V	703
2021-10-03 08:51:11	C	02 47 57.85	+20 59 43.0	–	V	703
2021-10-03 08:58:46	C	02 47 58.08	+20 59 46.1	–	V	703
2021-10-03 22:11:50	C	02 48 27.45	+21 05 22.4	–	V	Y90
2021-10-03 22:16:49	C	02 48 27.62	+21 05 25.0	–	V	Y90
2021-10-03 22:21:49	C	02 48 27.81	+21 05 27.4	–	V	Y90
2021-10-04 11:47:37	C	02 48 55.46	+21 11 30.0	–	V	T05
2021-10-04 11:50:16	C	02 48 55.54	+21 11 31.3	–	V	T05
2021-10-04 11:54:13	C	02 48 55.65	+21 11 33.1	–	V	T05
2021-10-04 12:01:36	C	02 48 55.86	+21 11 36.1	–	V	T05
2021-10-06 10:25:24	C	02 50 31.86	+21 31 58.3	–	V	T08
2021-10-06 10:36:14	C	02 50 32.17	+21 32 03.3	–	V	T08
2021-10-06 10:38:14	C	02 50 32.24	+21 32 04.2	–	V	T08
2021-10-06 10:38:54	C	02 50 32.28	+21 32 04.6	–	V	T08
2021-10-06 10:42:55	C	02 50 32.38	+21 32 06.0	–	V	T08
2021-10-06 10:46:54	C	02 50 32.45	+21 32 07.8	–	V	T08
2021-10-06 10:50:56	C	02 50 32.55	+21 32 10.0	–	V	T08
2021-10-06 11:05:33	C	02 50 32.95	+21 32 16.4	–	V	T08
2021-10-08 07:55:51	C	02 52 00.61	+21 52 10.7	–	V	G96
2021-10-08 08:03:17	C	02 52 00.80	+21 52 14.2	–	V	G96
2021-10-08 08:10:45	C	02 52 00.98	+21 52 17.5	–	V	G96
2021-10-08 08:18:10	C	02 52 01.17	+21 52 21.0	–	V	G96
2021-10-09 00:11:17	C	02 52 31.30	+21 59 22.4	–	V	Z80
2021-10-09 00:17:57	C	02 52 31.49	+21 59 25.3	–	V	Z80
2021-10-09 00:24:36	C	02 52 31.67	+21 59 28.6	–	V	Z80
2021-10-09 08:07:13	C	02 52 46.01	+22 03 06.7	–	V	703
2021-10-09 08:14:48	C	02 52 46.18	+22 03 10.3	–	V	703
2021-10-09 08:22:23	C	02 52 46.37	+22 03 13.8	–	V	703
2021-10-09 08:29:58	C	02 52 46.55	+22 03 17.0	–	V	703
2021-10-09 20:37:47	C	02 53 09.68	+22 08 37.2	–	V	G02
2021-10-09 20:42:53	C	02 53 09.83	+22 08 40.5	–	V	G02
2021-10-09 20:48:29	C	02 53 10.01	+22 08 44.0	–	V	G02
2021-10-10 05:05:53	C	02 53 25.42	+22 12 38.9	–	t	V40
2021-10-10 05:58:24	C	02 53 26.71	+22 13 04.3	–	t	V40
2021-10-10 07:08:05	C	02 53 28.37	+22 13 37.6	–	t	V40
2021-10-10 12:58:05	C	02 53 37.72	+22 16 24.1	–	V	T08
2021-10-10 13:02:16	C	02 53 37.82	+22 16 25.7	–	V	T08
2021-10-10 13:10:17	C	02 53 38.01	+22 16 29.3	–	V	T08
2021-10-10 13:25:54	C	02 53 38.34	+22 16 35.9	–	V	T08
2021-10-11 00:28:53	C	02 53 58.92	+22 21 30.8	–	q	B88
2021-10-11 02:07:34	C	02 54 01.22	+22 22 16.1	–	q	B88
2021-10-11 03:46:15	C	02 54 03.57	+22 23 00.4	–	q	B88
2021-10-11 04:33:34	C	02 54 07.38	+22 23 25.8	–	t	V40
2021-10-11 05:42:11	C	02 54 09.08	+22 23 59.4	–	t	V40
2021-10-11 07:06:04	C	02 54 11.00	+22 24 40.1	–	t	V40
2021-10-11 18:26:14	C	02 54 29.80	+22 29 56.7	–	V	D29
2021-10-11 18:30:03	C	02 54 29.87	+22 29 58.3	–	V	D29
2021-10-11 18:46:35	C	02 54 30.24	+22 30 05.9	–	V	D29

« Prev 1 2 … 15 16 17 … 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)