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
2021-11-01 10:23:55 S 03 02 21.794 +27 23 34.80 – V C57
2021-11-01 10:23:55 s 1 -42535.496 0 +363837.35 7130.0 – C57
2021-11-01 10:33:56 S 03 02 21.842 +27 23 40.27 – V C57
2021-11-01 10:33:56 s 1 -42891.160 0 +363691.31 2120.0 – C57
2021-11-01 10:43:56 S 03 02 21.914 +27 23 44.70 – V C57
2021-11-01 10:43:56 s 1 -43246.686 0 +363544.19 6520.0 – C57
2021-11-01 10:53:55 S 03 02 21.922 +27 23 50.86 – V C57
2021-11-01 10:53:55 s 1 -43602.072 0 +363396.02 340.0 – C57
2021-11-01 10:54:22 C 03 05 08.02 +27 12 33.1 – V T05
2021-11-01 10:59:00 C 03 05 08.03 +27 12 36.4 – V T05
2021-11-01 11:03:56 S 03 02 21.955 +27 23 56.90 – V C57
2021-11-01 11:03:56 s 1 -43957.318 0 +363246.77 3570.0 – C57
2021-11-01 11:13:55 S 03 02 21.962 +27 24 01.91 – V C57
2021-11-01 11:13:55 s 1 -44312.422 0 +363096.46 6210.0 – C57
2021-11-01 11:16:29 C 03 05 08.04 +27 12 49.1 – V T05
2021-11-01 11:23:56 S 03 02 21.994 +27 24 05.90 – V C57
2021-11-01 11:23:56 s 1 -44667.383 0 +362945.08 8240.0 – C57
2021-11-01 11:23:56 C 03 05 08.04 +27 12 54.5 – V T05
2021-11-01 11:33:55 S 03 02 22.034 +27 24 11.66 – V C57
2021-11-01 11:33:55 s 1 -45022.201 0 +362792.64 9680.0 – C57
2021-11-01 11:43:56 S 03 02 22.008 +27 24 18.29 – V C57
2021-11-01 11:43:56 s 1 -45376.873 0 +362639.12 510.0 – C57
2021-11-01 11:53:55 S 03 02 22.133 +27 24 23.00 – V C57
2021-11-01 11:53:55 s 1 -45731.399 0 +362484.54 730.0 – C57
2021-11-01 12:03:55 S 03 02 22.219 +27 24 27.76 – V C57
2021-11-01 12:03:55 s 1 -46085.777 0 +362328.89 330.0 – C57
2021-11-01 12:13:56 S 03 02 22.222 +27 24 33.52 – V C57
2021-11-01 12:13:56 s 1 -46440.007 0 +362172.17 9320.0 – C57
2021-11-01 12:23:55 S 03 02 22.262 +27 24 40.32 – V C57
2021-11-01 12:23:55 s 1 -46794.087 0 +362014.38 7680.0 – C57
2021-11-01 12:33:54 S 03 02 22.330 +27 24 45.14 – V C57
2021-11-01 12:33:54 s 1 -47148.016 0 +361855.52 5420.0 – C57
2021-11-01 12:43:55 S 03 02 22.286 +27 24 50.26 – V C57
2021-11-01 12:43:55 s 1 -47501.793 0 +361695.59 2530.0 – C57
2021-11-01 12:53:56 S 03 02 22.294 +27 24 55.76 – V C57
2021-11-01 12:53:56 s 1 -47855.402 0 +361534.62 9060.0 – C57
2021-11-01 13:03:55 S 03 02 22.373 +27 25 00.66 – V C57
2021-11-01 13:03:55 s 1 -48208.143 0 +361373.86 7890.0 – C57
2021-11-01 13:13:56 S 03 02 22.399 +27 25 05.92 – V C57
2021-11-01 13:13:56 s 1 -48561.502 0 +361210.64 2890.0 – C57
2021-11-01 13:23:55 S 03 02 22.399 +27 25 10.74 – V C57
2021-11-01 13:23:55 s 1 -48914.658 0 +361046.43 7440.0 – C57
2021-11-01 13:33:55 S 03 02 22.474 +27 25 17.18 – V C57
2021-11-01 13:33:55 s 1 -49267.655 0 +360881.15 1330.0 – C57
2021-11-01 13:43:56 S 03 02 22.517 +27 25 22.12 – V C57
2021-11-01 13:43:56 s 1 -49620.494 0 +360714.79 4560.0 – C57
2021-11-01 13:53:55 S 03 02 22.582 +27 25 28.16 – V C57
2021-11-01 13:53:55 s 1 -49973.172 0 +360547.36 7140.0 – C57
2021-11-01 14:03:56 S 03 02 22.663 +27 25 32.45 – V C57
2021-11-01 14:03:56 s 1 -50325.689 0 +360378.85 9050.0 – 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)