IAA RAS IAA Minor Planet Database

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
2019-09-04 09:44:13 C 21 47 31.322 -12 09 46.61 – U F51
2019-09-04 10:03:48 C 21 47 29.875 -12 09 52.87 – U F51
2019-09-04 10:05:57 C 21 47 29.706 -12 09 53.63 – U F51
2019-09-04 10:25:31 C 21 47 28.258 -12 09 59.91 – U F51
2019-09-04 10:27:41 C 21 47 28.092 -12 10 00.60 – U F51
2019-09-04 10:47:14 C 21 47 26.645 -12 10 06.85 – U F51
2019-09-04 10:49:24 C 21 47 26.471 -12 10 07.56 – U F51
2019-09-04 11:08:56 C 21 47 25.019 -12 10 13.88 – U F51
2019-09-04 11:30:40 C 21 47 23.417 -12 10 20.74 – U F51
2019-09-04 11:52:22 C 21 47 21.814 -12 10 27.67 – U F51
2019-09-21 02:24:20 C 21 23 02.26 -13 56 27.4 – V G96
2019-09-21 02:32:33 C 21 23 01.87 -13 56 29.0 – V G96
2019-09-21 02:40:45 C 21 23 01.46 -13 56 30.4 – V G96
2019-09-21 02:48:58 C 21 23 01.08 -13 56 31.7 – V G96
2019-09-23 07:18:21 C 21 20 39.349 -14 06 11.99 – U F51
2019-09-23 07:33:43 C 21 20 38.646 -14 06 14.74 – U F51
2019-09-23 07:49:06 C 21 20 37.959 -14 06 17.42 – U F51
2019-09-23 08:04:28 C 21 20 37.247 -14 06 20.14 – U F51
2019-10-04 03:22:21 C 21 12 40.85 -14 37 42.6 – V G96
2019-10-04 03:30:29 C 21 12 40.70 -14 37 43.2 – V G96
2019-10-04 03:38:37 C 21 12 40.52 -14 37 43.7 – V G96
2019-10-04 03:46:43 C 21 12 40.35 -14 37 44.4 – V G96
2019-10-23 06:06:01 C 21 13 42.589 -14 28 48.53 – U F51
2019-10-23 06:21:49 C 21 13 42.900 -14 28 46.90 – U F51
2019-10-23 06:37:39 C 21 13 43.195 -14 28 45.21 – U F51
2019-10-23 06:53:25 C 21 13 43.497 -14 28 43.49 – U F51
2019-10-29 05:27:23 C 21 17 34.567 -14 10 36.20 – U F52
2019-10-29 05:42:18 C 21 17 35.010 -14 10 34.16 – U F52
2019-10-29 05:57:08 C 21 17 35.438 -14 10 31.88 – U F52
2019-11-01 02:52:22 C 21 19 58.90 -13 59 18.8 – V G96
2019-11-01 03:00:41 C 21 19 59.24 -13 59 16.5 – V G96
2019-11-01 03:08:58 C 21 19 59.51 -13 59 15.7 – V G96
2019-11-01 03:17:16 C 21 19 59.78 -13 59 13.8 – V G96
2019-11-17 04:57:02 C 21 38 52.946 -12 27 25.16 – U F52
2019-11-17 04:57:57 C 21 38 52.989 -12 27 25.06 – U F52
2019-11-17 05:04:33 C 21 38 53.372 -12 27 23.12 – U F52
2019-11-17 05:10:11 C 21 38 53.696 -12 27 20.94 – U F52
2019-11-17 05:11:06 C 21 38 53.743 -12 27 21.01 – U F52
2019-11-17 05:16:43 C 21 38 54.054 -12 27 19.25 – U F52
2019-11-17 05:17:38 C 21 38 54.124 -12 27 19.31 – U F52
2020-01-25 05:21:59 C 00 13 30.360 +02 53 14.99 – U F51
2020-01-25 05:29:24 C 00 13 31.258 +02 53 20.72 – U F51
2020-01-25 05:36:49 C 00 13 32.158 +02 53 26.49 – U F51
2020-01-25 05:44:13 C 00 13 33.072 +02 53 32.33 – U F51
2020-03-18 11:23:40 C 03 32 10.19 +19 31 47.9 – q D29
2020-03-18 11:44:01 C 03 32 14.08 +19 31 59.0 – q D29
2020-04-05 03:07:02 C 04 58 35.26 +22 34 51.1 – V G96
2020-04-05 03:13:52 C 04 58 36.63 +22 34 53.4 – V G96
2020-04-05 03:20:45 C 04 58 38.14 +22 34 54.2 – V G96
2020-04-05 03:27:37 C 04 58 39.60 +22 34 56.0 – 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)