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
2021-10-29 20:03:56 s 1 +90861.958 0 +345217.96 4090.0 – C57
2021-10-29 20:06:46 C 03 04 08.07 +26 28 08.7 – V C40
2021-10-29 20:08:21 C 03 04 08.09 +26 28 09.7 – V C40
2021-10-29 20:09:55 C 03 04 08.11 +26 28 10.8 – V C40
2021-10-29 20:11:30 C 03 04 08.10 +26 28 11.8 – V C40
2021-10-29 20:13:04 C 03 04 08.13 +26 28 12.9 – V C40
2021-10-29 20:13:56 S 03 02 32.532 +26 48 07.06 – V C57
2021-10-29 20:13:56 s 1 +90529.229 0 +345463.93 4670.0 – C57
2021-10-29 20:14:39 C 03 04 08.13 +26 28 14.0 – V C40
2021-10-29 20:17:46 C 03 04 08.15 +26 28 16.2 – V C40
2021-10-29 20:20:55 C 03 04 08.17 +26 28 18.4 – V C40
2021-10-29 20:22:30 C 03 04 08.19 +26 28 19.6 – V C40
2021-10-29 20:23:56 S 03 02 32.489 +26 48 13.97 – V C57
2021-10-29 20:23:56 s 1 +90196.225 0 +345708.81 4390.0 – C57
2021-10-29 20:33:56 S 03 02 32.407 +26 48 20.05 – V C57
2021-10-29 20:33:56 s 1 +89862.948 0 +345952.61 3250.0 – C57
2021-10-29 20:43:56 S 03 02 32.316 +26 48 25.31 – V C57
2021-10-29 20:43:56 s 1 +89529.398 0 +346195.32 1250.0 – C57
2021-10-29 20:45:04 C 03 04 08.34 +26 28 35.3 – V C40
2021-10-29 20:53:56 S 03 02 32.206 +26 48 32.33 – V C57
2021-10-29 20:53:56 s 1 +89195.578 0 +346436.94 8410.0 – C57
2021-10-29 20:57:38 C 03 04 08.43 +26 28 43.9 – V C40
2021-10-29 21:00:43 C 03 04 08.98 +26 28 45.2 – V 073
2021-10-29 21:03:56 S 03 02 32.208 +26 48 37.62 – V C57
2021-10-29 21:03:56 s 1 +88861.488 0 +346677.48 4730.0 – C57
2021-10-29 21:13:56 S 03 02 32.110 +26 48 43.70 – V C57
2021-10-29 21:13:56 s 1 +88527.129 0 +346916.94 200.0 – C57
2021-10-29 21:14:03 C 03 04 09.07 +26 28 54.7 – V 073
2021-10-29 21:23:56 S 03 02 31.956 +26 48 50.29 – V C57
2021-10-29 21:23:56 s 1 +88192.505 0 +347155.31 4840.0 – C57
2021-10-29 21:27:23 C 03 04 09.16 +26 29 03.9 – V 073
2021-10-29 21:40:44 C 03 04 09.25 +26 29 13.1 – V 073
2021-10-29 21:43:56 S 03 02 31.831 +26 49 01.67 – V C57
2021-10-29 21:43:56 s 1 +87522.460 0 +347628.79 1640.0 – C57
2021-10-29 21:53:56 S 03 02 31.757 +26 49 07.68 – V C57
2021-10-29 21:53:56 s 1 +87187.043 0 +347863.91 3810.0 – C57
2021-10-29 21:54:04 C 03 04 09.33 +26 29 22.5 – V 073
2021-10-29 22:03:56 S 03 02 31.687 +26 49 14.41 – V C57
2021-10-29 22:03:56 s 1 +86851.365 0 +348097.95 5160.0 – C57
2021-10-29 22:13:56 S 03 02 31.550 +26 49 20.28 – V C57
2021-10-29 22:13:56 s 1 +86515.427 0 +348330.90 5700.0 – C57
2021-10-29 22:23:56 S 03 02 31.531 +26 49 27.16 – V C57
2021-10-29 22:23:56 s 1 +86179.231 0 +348562.78 5430.0 – C57
2021-10-29 22:33:56 S 03 02 31.462 +26 49 32.81 – V C57
2021-10-29 22:33:56 s 1 +85842.777 0 +348793.57 4360.0 – C57
2021-10-29 22:43:56 S 03 02 31.421 +26 49 38.96 – V C57
2021-10-29 22:43:56 s 1 +85506.068 0 +349023.28 2500.0 – C57
2021-10-29 22:53:56 S 03 02 31.346 +26 49 44.36 – V C57
2021-10-29 22:53:56 s 1 +85169.104 0 +349251.91 9840.0 – C57
2021-10-29 23:03:56 S 03 02 31.229 +26 49 51.35 – 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)