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 Period1.80962371 yr ± 5.48e+00
NGA Modelr2
A2-4.68169994e-04 AU/d²
Physical Parameters
H (abs. magnitude)18.75
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual4.495″
Uncertainty0
Orbit TypeApollo
MOID0.004051 AU
Observations Used4486
Radar Obs Used28
Oppositions9
Arc Total1981-2002
First Observation Used1990-09-16
Last Observation Used2024-01-02
Observations (7063)
Date Type RA Dec Mag Band Observatory
2021-11-22 20:07:28 C 03 21 34.92 +38 11 01.3 V C40
2021-11-22 20:12:04 C 03 21 35.17 +38 11 12.5 V C40
2021-11-22 20:16:41 C 03 21 35.42 +38 11 23.8 V C40
2021-11-22 20:18:15 C 03 21 35.51 +38 11 27.5 V C40
2021-11-22 20:19:46 C 03 21 35.59 +38 11 31.2 V C40
2021-11-22 20:22:51 C 03 21 35.76 +38 11 38.7 V C40
2021-11-22 20:24:25 C 03 21 35.84 +38 11 42.4 V C40
2021-11-22 23:02:07 C 03 21 47.90 +38 17 53.3 V K87
2021-11-22 23:06:20 C 03 21 48.16 +38 18 02.8 V K87
2021-11-22 23:09:31 C 03 21 48.35 +38 18 11.0 V K87
2021-11-22 23:12:40 C 03 21 48.54 +38 18 18.6 V K87
2021-11-22 23:16:54 C 03 21 48.77 +38 18 28.7 V K87
2021-11-23 10:49:14 C 03 22 47.67 +38 48 03.1 V T08
2021-11-23 10:53:54 C 03 22 47.91 +38 48 14.4 V T08
2021-11-23 11:09:20 C 03 22 48.73 +38 48 51.8 V T08
2021-11-23 11:31:17 C 03 22 49.91 +38 49 44.7 V T08
2021-11-23 16:34:53 C 03 23 29.00 +39 02 23.3 V M44
2021-11-23 16:51:42 C 03 23 30.09 +39 03 10.5 V M44
2021-11-23 17:09:00 C 03 23 31.15 +39 03 59.1 V M44
2021-11-23 19:51:46 C 03 23 40.31 +39 11 12.0 q M47
2021-11-23 20:03:45 C 03 23 40.98 +39 11 43.0 q M47
2021-11-23 20:13:35 C 03 23 41.53 +39 12 08.1 q M47
2021-11-23 20:23:21 C 03 23 42.09 +39 12 33.3 q M47
2021-11-23 20:33:12 C 03 23 42.65 +39 12 58.3 q M47
2021-11-23 20:42:59 C 03 23 43.28 +39 13 24.7 q M47
2021-11-23 20:49:32 C 03 23 43.59 +39 13 39.6 q M47
2021-11-23 20:52:50 C 03 23 43.78 +39 13 48.1 q M47
2021-11-24 08:51:59 C 03 25 00.77 +39 46 16.0 V T08
2021-11-24 08:56:40 C 03 25 01.06 +39 46 29.1 V T08
2021-11-24 09:11:20 C 03 25 01.95 +39 47 10.1 V T08
2021-11-24 09:28:55 C 03 25 03.01 +39 47 58.8 V T08
2021-11-24 16:51:44 C 03 25 56.31 +40 08 09.7 V M44
2021-11-24 17:08:24 C 03 25 57.59 +40 09 00.3 V M44
2021-11-24 17:25:37 C 03 25 58.83 +40 09 52.3 V M44
2021-11-24 18:08:20 C 03 26 04.81 +40 10 34.3 V K85
2021-11-24 19:19:29 C 03 26 11.65 +40 14 11.0 V K85
2021-11-24 19:59:28 C 03 26 15.27 +40 16 11.8 V K85
2021-11-25 10:08:02 C 03 27 47.94 +40 59 09.7 V T05
2021-11-25 10:27:54 C 03 27 49.46 +41 00 08.6 V T05
2021-11-25 10:39:09 C 03 27 50.33 +41 00 41.9 V T05
2021-11-25 10:49:28 C 03 27 51.12 +41 01 12.1 V T05
2021-11-25 15:52:00 C 03 28 40.78 +41 16 05.1 V M44
2021-11-25 16:08:44 C 03 28 42.50 +41 17 01.9 V M44
2021-11-25 16:25:51 C 03 28 44.09 +41 17 57.9 V M44
2021-11-25 18:59:28 C 03 28 59.43 +41 25 30.1 V C40
2021-11-25 19:01:00 C 03 28 59.57 +41 25 35.0 V C40
2021-11-25 19:04:05 C 03 28 59.87 +41 25 45.0 V C40
2021-11-25 19:05:38 C 03 29 00.02 +41 25 50.1 V C40
2021-11-25 19:07:11 C 03 29 00.17 +41 25 55.0 V C40
2021-11-25 19:08:43 C 03 29 00.31 +41 25 59.9 V C40
Radar Observations (65)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
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)