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
2021-10-15 23:23:56 s 1 +128185.95 7 +297560.35 3600.0 – C57
2021-10-15 23:33:56 S 02 56 30.209 +23 31 33.28 – V C57
2021-10-15 23:33:56 s 1 +127900.91 8 +297969.50 5610.0 – C57
2021-10-15 23:43:56 S 02 56 30.235 +23 31 38.32 – V C57
2021-10-15 23:43:56 s 1 +127615.35 2 +298377.42 5880.0 – C57
2021-10-15 23:53:56 S 02 56 30.247 +23 31 42.96 – V C57
2021-10-15 23:53:56 s 1 +127329.26 2 +298784.11 4430.0 – C57
2021-10-16 00:03:56 S 02 56 30.518 +23 31 46.92 – V C57
2021-10-16 00:03:56 s 1 +127042.65 1 +299189.58 1250.0 – C57
2021-10-16 00:13:56 S 02 56 30.370 +23 31 53.22 – V C57
2021-10-16 00:13:56 s 1 +126755.52 0 +299593.83 6360.0 – C57
2021-10-16 01:57:31 C 02 57 17.31 +23 19 31.7 – V B18
2021-10-16 02:02:15 C 02 57 17.39 +23 19 33.9 – V B18
2021-10-16 02:06:58 C 02 57 17.52 +23 19 36.1 – V B18
2021-10-16 02:11:43 C 02 57 17.60 +23 19 38.4 – V B18
2021-10-16 02:16:27 C 02 57 17.70 +23 19 40.4 – V B18
2021-10-16 02:25:54 C 02 57 17.90 +23 19 44.5 – V B18
2021-10-16 02:30:40 C 02 57 18.03 +23 19 46.8 – V B18
2021-10-16 06:50:43 C 02 57 26.87 +23 22 04.0 – V 703
2021-10-16 06:58:23 C 02 57 27.01 +23 22 08.7 – V 703
2021-10-16 07:06:03 C 02 57 27.21 +23 22 13.3 – V 703
2021-10-16 07:13:43 C 02 57 27.36 +23 22 17.4 – V 703
2021-10-18 09:55:30 C 02 58 41.94 +23 48 05.2 – V T08
2021-10-18 09:58:49 C 02 58 42.00 +23 48 06.8 – V T08
2021-10-18 10:00:48 C 02 58 42.01 +23 48 07.9 – V T08
2021-10-18 10:02:48 C 02 58 42.03 +23 48 09.0 – V T08
2021-10-18 10:04:47 C 02 58 42.07 +23 48 09.9 – V T08
2021-10-18 10:09:26 C 02 58 42.14 +23 48 12.7 – V T08
2021-10-18 10:26:13 C 02 58 42.38 +23 48 21.5 – V T08
2021-10-19 23:02:18 C 02 59 32.97 +24 07 12.9 – V K87
2021-10-19 23:08:38 C 02 59 33.07 +24 07 16.4 – V K87
2021-10-19 23:14:59 C 02 59 33.18 +24 07 19.7 – V K87
2021-10-20 12:33:56 S 02 57 46.781 +24 17 37.86 – V C57
2021-10-20 12:33:56 s 1 -99856.421 0 +328852.45 3370.0 – C57
2021-10-20 14:23:56 S 02 57 49.042 +24 18 20.66 – V C57
2021-10-20 14:23:56 s 1 -103408.58 8 +325408.22 6830.0 – C57
2021-10-20 14:43:56 S 02 57 49.454 +24 18 30.10 – V C57
2021-10-20 14:43:56 s 1 -104049.74 0 +324766.93 5250.0 – C57
2021-10-20 14:53:56 S 02 57 49.673 +24 18 32.65 – V C57
2021-10-20 14:53:56 s 1 -104369.76 1 +324444.53 7380.0 – C57
2021-10-20 15:03:56 S 02 57 49.834 +24 18 35.57 – V C57
2021-10-20 15:03:56 s 1 -104689.41 1 +324120.97 8110.0 – C57
2021-10-20 15:13:56 S 02 57 50.066 +24 18 40.14 – V C57
2021-10-20 15:13:56 s 1 -105008.68 6 +323796.25 7450.0 – C57
2021-10-20 15:23:56 S 02 57 50.263 +24 18 44.50 – V C57
2021-10-20 15:23:56 s 1 -105327.58 7 +323470.36 5370.0 – C57
2021-10-20 15:33:56 S 02 57 50.405 +24 18 48.17 – V C57
2021-10-20 15:33:56 s 1 -105646.11 0 +323143.31 1880.0 – C57
2021-10-20 15:43:56 S 02 57 50.494 +24 18 52.63 – V C57
2021-10-20 15:43:56 s 1 -105964.25 4 +322815.08 6970.0 – 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)