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
2022-05-03 15:47:39 C 13 27 03.290 -14 16 09.08 V P07
2022-05-04 04:45:58 C 13 26 36.221 -14 11 32.24 V W68
2022-05-04 04:50:31 C 13 26 36.041 -14 11 30.52 V W68
2022-05-04 04:59:03 C 13 26 35.717 -14 11 27.82 V W68
2022-05-04 05:14:46 C 13 26 35.131 -14 11 21.80 V W68
2022-05-04 06:30:11 C 13 26 32.982 -14 11 16.33 V G96
2022-05-04 06:38:18 C 13 26 32.665 -14 11 13.49 V G96
2022-05-04 06:46:24 C 13 26 32.356 -14 11 10.64 V G96
2022-05-04 06:56:49 C 13 26 31.960 -14 11 06.94 V G96
2022-05-04 14:11:53 C 13 26 17.93 -14 08 37.3 V D29
2022-05-04 14:32:15 C 13 26 17.16 -14 08 29.9 V D29
2022-05-04 14:52:37 C 13 26 16.39 -14 08 23.0 V D29
2022-05-06 04:33:26 C 13 25 06.427 -13 55 33.17 V W68
2022-05-06 04:39:40 C 13 25 06.218 -13 55 31.08 V W68
2022-05-06 04:55:06 C 13 25 05.702 -13 55 24.49 V W68
2022-05-06 05:03:34 C 13 25 05.390 -13 55 23.52 V W68
2022-05-06 08:04:20 C 13 25 00.167 -13 54 44.64 V 703
2022-05-06 08:12:07 C 13 24 59.864 -13 54 42.16 V 703
2022-05-06 08:19:54 C 13 24 59.656 -13 54 39.24 V 703
2022-05-06 08:27:42 C 13 24 59.360 -13 54 36.94 V 703
2022-05-10 06:24:01 C 13 22 46.412 -13 27 19.37 V 703
2022-05-10 06:31:55 C 13 22 46.157 -13 27 17.50 V 703
2022-05-10 06:39:49 C 13 22 46.016 -13 27 14.72 V 703
2022-05-10 06:47:42 C 13 22 45.808 -13 27 13.75 V 703
2022-05-22 07:04:00 C 13 20 59.779 -12 35 02.10 U F52
2022-05-22 07:20:31 C 13 20 59.804 -12 35 00.41 U F52
2022-05-22 07:37:05 C 13 20 59.825 -12 34 58.71 U F52
2022-05-22 07:53:31 C 13 20 59.850 -12 34 57.00 U F52
2022-05-24 11:46:59 C 13 21 23.599 -12 30 04.14 V P07
2022-05-24 12:45:08 C 13 21 23.976 -12 30 00.43 V P07
2022-05-24 13:44:32 C 13 21 24.276 -12 29 55.50 V P07
2022-05-24 15:00:55 C 13 21 24.706 -12 29 49.81 V P07
2022-05-27 03:11:00 C 13 22 06.864 -12 26 04.60 V W68
2022-05-27 03:17:04 C 13 22 06.883 -12 26 04.99 V W68
2022-05-27 03:29:05 C 13 22 07.015 -12 26 03.88 V W68
2022-05-27 03:48:48 C 13 22 07.178 -12 26 03.41 V W68
2022-05-28 20:59:11 C 13 22 44.83 -12 24 44.7 X 511
2022-05-28 21:04:14 C 13 22 44.92 -12 24 45.2 X 511
2022-05-28 21:09:17 C 13 22 44.96 -12 24 44.1 X 511
2022-05-28 21:14:20 C 13 22 45.05 -12 24 44.4 X 511
2022-05-29 21:26:39 C 13 23 10.00 -12 24 10.3 X 511
2022-05-29 21:31:42 C 13 23 10.11 -12 24 09.6 X 511
2022-05-29 21:36:45 C 13 23 10.21 -12 24 10.5 X 511
2022-05-31 21:17:06 C 13 24 05.82 -12 23 47.9 X 511
2022-05-31 21:22:09 C 13 24 05.91 -12 23 47.9 X 511
2022-05-31 21:27:12 C 13 24 06.01 -12 23 47.9 X 511
2022-05-31 21:32:15 C 13 24 06.10 -12 23 47.9 X 511
2022-05-31 21:37:18 C 13 24 06.19 -12 23 47.8 X 511
2023-10-03 11:38:43 C 09 12 05.976 +17 13 04.94 V G96
2023-10-03 11:44:12 C 09 12 07.106 +17 12 59.62 V G96
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)