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
2001-11-09 19:41:27 C 00 37 11.34 +13 09 27.2 d 631
2001-11-09 21:35:33 C 00 37 00.00 +13 08 49.0 d 631
2001-11-10 05:40:35 C 00 36 15.34 +13 06 11.9 15.8 c 704
2001-11-10 06:02:16 C 00 36 13.14 +13 06 04.3 16.7 c 704
2001-11-10 06:23:10 C 00 36 11.02 +13 05 56.2 16.6 c 704
2001-11-10 06:44:07 C 00 36 08.90 +13 05 48.7 16.8 c 704
2001-11-10 07:04:59 C 00 36 06.80 +13 05 41.0 16.5 c 704
2001-11-11 04:59:20 C 00 34 08.50 +12 58 04.1 16.1 c 704
2001-11-11 05:20:12 C 00 34 06.39 +12 57 56.4 16.1 c 704
2001-11-11 05:41:02 C 00 34 04.28 +12 57 49.0 16.7 c 704
2001-11-11 06:01:55 C 00 34 02.17 +12 57 41.2 16.4 c 704
2001-11-11 06:22:52 C 00 34 00.05 +12 57 33.5 16.6 c 704
2001-11-12 03:19:06 C 00 32 08.89 +12 50 12.1 16.2 c 704
2001-11-12 03:40:21 C 00 32 06.74 +12 50 04.9 16.4 c 704
2001-11-12 04:01:16 C 00 32 04.62 +12 49 57.4 16.7 c 704
2001-11-12 04:24:16 C 00 32 02.31 +12 49 49.4 16.6 c 704
2001-11-12 04:45:17 C 00 32 00.18 +12 49 41.7 16.4 c 704
2001-11-13 04:32:28 C 00 29 53.28 +12 41 16.8 16.7 c 704
2001-11-13 04:53:11 C 00 29 51.22 +12 41 09.3 16.9 c 704
2001-11-13 05:13:50 C 00 29 49.15 +12 41 01.9 16.5 c 704
2001-11-13 05:34:28 C 00 29 47.09 +12 40 54.1 16.5 c 704
2001-11-13 05:55:07 C 00 29 45.06 +12 40 46.3 16.8 c 704
2001-11-14 19:16:12 C 00 26 30.80 +12 27 19.2 d 631
2001-11-14 20:27:23 C 00 26 24.03 +12 26 54.5 d 631
2001-11-16 19:01:00 C 00 22 27.65 +12 10 35.0 610
2001-11-16 19:05:00 C 00 22 27.27 +12 10 33.6 610
2001-11-16 19:09:01 C 00 22 26.90 +12 10 32.2 610
2001-11-16 19:13:01 C 00 22 26.53 +12 10 30.8 610
2001-11-16 19:17:00 C 00 22 26.15 +12 10 29.4 610
2001-11-17 03:29:55 C 00 21 44.97 +12 07 44.4 15.8 c 704
2001-11-17 03:50:42 C 00 21 43.01 +12 07 37.1 16.1 c 704
2001-11-17 04:18:08 C 00 21 40.41 +12 07 27.6 16.3 c 704
2001-11-17 04:38:53 C 00 21 38.44 +12 07 20.2 16.6 c 704
2001-11-17 05:00:35 C 00 21 36.41 +12 07 12.2 16.9 c 704
2001-11-17 05:15:30 C 00 21 35.43 +12 07 08.7 15.8 c 644
2001-11-17 05:46:06 C 00 21 32.53 +12 06 57.6 16.2 c 644
2001-11-17 06:16:23 C 00 21 29.69 +12 06 46.6 16.2 c 644
2001-11-17 19:30:00 C 00 20 26.03 +12 02 01.2 c 130
2001-11-17 19:41:00 C 00 20 25.04 +12 01 57.3 c 130
2001-11-17 19:50:59 C 00 20 24.11 +12 01 54.0 c 130
2001-11-17 19:58:00 C 00 20 23.48 +12 01 51.6 c 130
2001-11-18 05:07:26 C 00 19 38.25 +11 58 50.4 17.7 c 644
2001-11-18 05:38:22 C 00 19 35.40 +11 58 39.2 18.0 c 644
2001-11-18 06:09:26 C 00 19 32.50 +11 58 28.0 16.9 c 644
2001-11-18 17:31:50 C 00 18 40.27 +11 54 21.8 c 185
2001-11-18 17:38:24 C 00 18 39.71 +11 54 19.7 c 185
2001-11-18 17:44:19 C 00 18 39.17 +11 54 17.4 c 185
2001-11-18 17:49:14 C 00 18 38.75 +11 54 16.5 c 185
2001-11-18 17:53:30 C 00 18 38.36 +11 54 14.8 c 185
2001-11-21 01:49:23 C 00 14 16.66 +11 35 32.3 16.5 c 704
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)