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
2021-10-29 18:32:48 C 03 04 07.27 +26 27 01.8 V C40
2021-10-29 18:33:56 S 03 02 33.211 +26 47 05.50 V C57
2021-10-29 18:33:56 s 1 +93843.905 0 +342955.19 9230.0 C57
2021-10-29 18:37:22 C 03 04 07.31 +26 27 05.0 V C40
2021-10-29 18:38:55 C 03 04 07.33 +26 27 06.1 V C40
2021-10-29 18:40:26 C 03 04 07.35 +26 27 07.5 V C40
2021-10-29 18:41:59 C 03 04 07.37 +26 27 08.2 V C40
2021-10-29 18:43:56 S 03 02 33.053 +26 47 12.30 V C57
2021-10-29 18:43:56 s 1 +93513.716 0 +343210.97 7790.0 C57
2021-10-29 18:45:02 C 03 04 07.39 +26 27 10.4 V C40
2021-10-29 18:46:35 C 03 04 07.41 +26 27 11.5 V C40
2021-10-29 18:48:06 C 03 04 07.42 +26 27 12.6 V C40
2021-10-29 18:53:56 S 03 02 33.089 +26 47 18.53 V C57
2021-10-29 18:53:56 s 1 +93183.239 0 +343465.66 5450.0 C57
2021-10-29 19:03:56 S 03 02 33.031 +26 47 24.11 V C57
2021-10-29 19:03:56 s 1 +92852.475 0 +343719.26 2210.0 C57
2021-10-29 19:11:51 C 03 04 07.63 +26 27 29.8 V C40
2021-10-29 19:13:22 C 03 04 07.65 +26 27 30.9 V C40
2021-10-29 19:13:56 S 03 02 32.966 +26 47 31.42 V C57
2021-10-29 19:13:56 s 1 +92521.426 0 +343971.77 8070.0 C57
2021-10-29 19:16:26 C 03 04 07.68 +26 27 32.9 V C40
2021-10-29 19:19:31 C 03 04 07.71 +26 27 35.1 V C40
2021-10-29 19:21:02 C 03 04 07.71 +26 27 36.3 V C40
2021-10-29 19:22:35 C 03 04 07.73 +26 27 37.4 V C40
2021-10-29 19:23:56 S 03 02 32.899 +26 47 37.00 V C57
2021-10-29 19:23:56 s 1 +92190.094 0 +344223.19 3040.0 C57
2021-10-29 19:24:05 C 03 04 07.74 +26 27 38.4 V C40
2021-10-29 19:25:38 C 03 04 07.75 +26 27 39.5 V C40
2021-10-29 19:27:09 C 03 04 07.77 +26 27 40.5 V C40
2021-10-29 19:30:13 C 03 04 07.80 +26 27 42.8 V C40
2021-10-29 19:31:46 C 03 04 07.81 +26 27 43.8 V C40
2021-10-29 19:33:17 C 03 04 07.81 +26 27 45.0 V C40
2021-10-29 19:33:56 S 03 02 32.837 +26 47 42.90 V C57
2021-10-29 19:33:56 s 1 +91858.479 0 +344473.51 7120.0 C57
2021-10-29 19:34:50 C 03 04 07.83 +26 27 45.9 V C40
2021-10-29 19:36:21 C 03 04 07.83 +26 27 47.0 V C40
2021-10-29 19:37:52 C 03 04 07.84 +26 27 48.1 V C40
2021-10-29 19:43:56 S 03 02 32.741 +26 47 49.52 V C57
2021-10-29 19:43:56 s 1 +91526.584 0 +344722.75 320.0 C57
2021-10-29 19:52:38 C 03 04 07.97 +26 27 58.6 V C40
2021-10-29 19:53:56 S 03 02 32.690 +26 47 55.43 V C57
2021-10-29 19:53:56 s 1 +91194.410 0 +344970.90 2640.0 C57
2021-10-29 19:54:13 C 03 04 07.98 +26 27 59.7 V C40
2021-10-29 19:55:47 C 03 04 08.00 +26 28 00.9 V C40
2021-10-29 19:57:20 C 03 04 08.00 +26 28 02.0 V C40
2021-10-29 19:58:55 C 03 04 08.02 +26 28 03.0 V C40
2021-10-29 20:00:29 C 03 04 08.03 +26 28 04.2 V C40
2021-10-29 20:02:04 C 03 04 08.04 +26 28 05.1 V C40
2021-10-29 20:03:39 C 03 04 08.05 +26 28 06.4 V C40
2021-10-29 20:03:56 S 03 02 32.647 +26 48 01.19 V C57
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)