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
2021-09-03 06:00:43 C 02 14 15.51 +16 00 34.5 – Z W33
2021-09-03 06:13:24 C 02 14 16.15 +16 00 41.2 – Z W33
2021-09-03 06:26:05 C 02 14 16.84 +16 00 45.9 – Z W33
2021-09-04 12:44:26 C 02 15 56.35 +16 13 19.7 – V T08
2021-09-04 12:47:45 C 02 15 56.52 +16 13 20.6 – V T08
2021-09-04 13:05:25 C 02 15 57.42 +16 13 28.2 – V T08
2021-09-04 13:14:17 C 02 15 57.90 +16 13 32.3 – V T08
2021-09-06 09:42:21 C 02 18 22.40 +16 31 45.0 – U I41
2021-09-06 10:02:16 C 02 18 23.28 +16 31 53.4 – V 703
2021-09-06 10:12:45 C 02 18 23.90 +16 31 58.3 – V 703
2021-09-06 10:20:20 C 02 18 24.21 +16 32 00.9 – V 703
2021-09-06 10:23:17 C 02 18 24.45 +16 32 01.8 – U I41
2021-09-06 10:27:55 C 02 18 24.54 +16 32 04.6 – V 703
2021-09-07 11:14:17 C 02 19 43.78 +16 42 13.5 – V G96
2021-09-07 11:22:20 C 02 19 44.15 +16 42 16.5 – V G96
2021-09-07 11:30:23 C 02 19 44.53 +16 42 20.1 – V G96
2021-09-08 10:08:30 C 02 20 56.71 +16 51 35.6 – U I41
2021-09-08 11:14:08 C 02 20 59.93 +16 52 02.5 – U I41
2021-09-12 05:10:31 C 02 25 39.20 +17 28 43.8 – Z W33
2021-09-12 05:21:59 C 02 25 39.77 +17 28 49.5 – Z W33
2021-09-12 05:33:26 C 02 25 40.29 +17 28 54.1 – Z W33
2021-09-12 11:48:42 C 02 25 59.05 +17 31 32.2 – V T08
2021-09-12 11:52:01 C 02 25 59.18 +17 31 33.4 – V T08
2021-09-12 11:56:40 C 02 25 59.43 +17 31 35.3 – V T08
2021-09-12 12:10:59 C 02 26 00.11 +17 31 41.8 – V T08
2021-09-13 08:27:34 C 02 27 01.37 +17 39 54.6 – V 703
2021-09-13 08:35:21 C 02 27 01.63 +17 39 56.1 – V 703
2021-09-13 08:43:08 C 02 27 02.07 +17 39 59.1 – V 703
2021-09-13 08:50:55 C 02 27 02.37 +17 40 02.4 – V 703
2021-09-16 08:35:55 C 02 30 34.05 +18 09 18.3 – V 703
2021-09-16 08:43:30 C 02 30 34.38 +18 09 22.0 – V 703
2021-09-16 08:51:05 C 02 30 34.72 +18 09 25.3 – V 703
2021-09-16 08:58:41 C 02 30 35.03 +18 09 28.4 – V 703
2021-09-16 10:02:03 C 02 30 37.84 +18 09 54.8 – V G96
2021-09-16 10:10:13 C 02 30 38.19 +18 09 58.1 – V G96
2021-09-16 10:18:23 C 02 30 38.56 +18 10 01.5 – V G96
2021-09-16 10:26:33 C 02 30 38.92 +18 10 04.7 – V G96
2021-09-28 11:18:34 C 02 43 29.13 +20 09 37.7 – V T08
2021-09-28 11:26:49 C 02 43 29.40 +20 09 40.3 – V T08
2021-09-28 11:31:29 C 02 43 29.57 +20 09 42.8 – V T08
2021-09-28 12:15:07 C 02 43 31.03 +20 10 01.8 – V T08
2021-09-29 23:30:00 C 02 44 55.14 +20 24 43.9 – V Z80
2021-09-29 23:38:05 C 02 44 55.44 +20 24 47.1 – V Z80
2021-09-30 12:40:21 C 02 45 25.05 +20 30 32.3 – V T05
2021-09-30 12:46:20 C 02 45 25.24 +20 30 34.8 – V T05
2021-09-30 12:55:27 C 02 45 25.53 +20 30 38.5 – V T05
2021-09-30 13:39:56 C 02 45 26.95 +20 30 57.2 – V T05
2021-10-02 13:47:16 C 02 47 15.45 +20 51 34.3 – V T08
2021-10-02 13:52:35 C 02 47 15.63 +20 51 36.5 – V T08
2021-10-02 14:00:36 C 02 47 15.84 +20 51 39.4 – V T08
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)