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
2021-11-05 13:43:55 S 03 05 02.587 +28 18 21.28 V C57
2021-11-05 13:43:55 s 1 -153921.33 2 +54781.992 2340.0 C57
2021-11-05 13:53:55 S 03 05 03.300 +28 18 27.47 V C57
2021-11-05 13:53:55 s 1 -153631.67 7 +53808.067 8840.0 C57
2021-11-05 14:03:55 S 03 05 04.054 +28 18 34.24 V C57
2021-11-05 14:03:55 s 1 -153337.68 5 +52832.622 9630.0 C57
2021-11-05 14:13:55 S 03 05 04.752 +28 18 41.29 V C57
2021-11-05 14:13:55 s 1 -153039.31 8 +51855.668 4580.0 C57
2021-11-05 14:23:55 S 03 05 05.537 +28 18 49.46 V C57
2021-11-05 14:23:55 s 1 -152736.53 8 +50877.216 3540.0 C57
2021-11-05 14:33:55 S 03 05 06.238 +28 18 57.24 V C57
2021-11-05 14:33:55 s 1 -152429.30 8 +49897.280 6390.0 C57
2021-11-05 14:43:55 S 03 05 06.998 +28 19 03.68 V C57
2021-11-05 14:43:55 s 1 -152117.58 8 +48915.872 2990.0 C57
2021-11-05 14:53:55 S 03 05 07.730 +28 19 10.09 V C57
2021-11-05 14:53:55 s 1 -151801.33 9 +47933.006 3190.0 C57
2021-11-05 15:03:55 S 03 05 08.515 +28 19 17.76 V C57
2021-11-05 15:03:55 s 1 -151480.52 1 +46948.695 6860.0 C57
2021-11-05 15:13:55 S 03 05 09.204 +28 19 26.04 V C57
2021-11-05 15:13:55 s 1 -151155.09 6 +45962.953 3850.0 C57
2021-11-05 15:23:55 S 03 05 09.955 +28 19 32.77 V C57
2021-11-05 15:23:55 s 1 -150825.02 1 +44975.795 4030.0 C57
2021-11-05 15:33:55 S 03 05 10.812 +28 19 40.08 V C57
2021-11-05 15:33:55 s 1 -150490.25 7 +43987.236 7240.0 C57
2021-11-05 15:43:55 S 03 05 11.525 +28 19 47.32 V C57
2021-11-05 15:43:55 s 1 -150150.76 1 +42997.292 3340.0 C57
2021-11-05 15:53:55 S 03 05 12.290 +28 19 53.76 V C57
2021-11-05 15:53:55 s 1 -149806.49 3 +42005.978 2180.0 C57
2021-11-05 16:03:55 S 03 05 13.034 +28 20 02.83 V C57
2021-11-05 16:03:55 s 1 -149457.40 9 +41013.312 3620.0 C57
2021-11-05 16:04:03 C 03 06 47.12 +28 31 53.4 Y N42
2021-11-05 16:06:10 C 03 06 47.14 +28 31 55.3 Y N42
2021-11-05 16:08:17 C 03 06 47.15 +28 31 57.2 Y N42
2021-11-05 16:10:24 C 03 06 47.16 +28 31 59.1 Y N42
2021-11-05 16:12:31 C 03 06 47.18 +28 32 01.1 Y N42
2021-11-05 16:13:55 S 03 05 13.812 +28 20 09.96 V C57
2021-11-05 16:13:55 s 1 -149103.46 7 +40019.310 7490.0 C57
2021-11-05 16:14:38 C 03 06 47.19 +28 32 03.0 Y N42
2021-11-05 16:16:45 C 03 06 47.20 +28 32 05.0 Y N42
2021-11-05 16:18:52 C 03 06 47.21 +28 32 06.8 Y N42
2021-11-05 16:21:00 C 03 06 47.23 +28 32 08.7 Y N42
2021-11-05 16:23:07 C 03 06 47.24 +28 32 10.6 Y N42
2021-11-05 16:23:55 S 03 05 14.616 +28 20 17.20 V C57
2021-11-05 16:23:55 s 1 -148744.62 3 +39023.989 3660.0 C57
2021-11-05 16:25:16 C 03 06 47.25 +28 32 12.6 Y N42
2021-11-05 16:27:23 C 03 06 47.26 +28 32 14.5 Y N42
2021-11-05 16:29:31 C 03 06 47.28 +28 32 16.4 Y N42
2021-11-05 16:31:41 C 03 06 47.29 +28 32 18.4 Y N42
2021-11-05 16:33:48 C 03 06 47.30 +28 32 20.3 Y N42
2021-11-05 16:33:55 S 03 05 15.382 +28 20 24.22 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)