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
2021-10-28 22:33:56 S 03 02 43.454 +26 34 31.44 V C57
2021-10-28 22:33:56 s 1 +130910.78 1 +304141.21 6010.0 C57
2021-10-28 22:42:48 C 03 03 45.89 +26 13 52.5 Y 557
2021-10-28 22:43:56 S 03 02 43.339 +26 34 37.20 V C57
2021-10-28 22:43:56 s 1 +130626.99 7 +304532.96 3890.0 C57
2021-10-28 23:03:56 S 03 02 43.159 +26 34 50.84 V C57
2021-10-28 23:03:56 s 1 +130057.93 6 +305312.91 4790.0 C57
2021-10-28 23:13:56 S 03 02 43.109 +26 34 56.71 V C57
2021-10-28 23:13:56 s 1 +129772.66 3 +305701.12 7820.0 C57
2021-10-28 23:33:56 S 03 02 42.902 +26 35 11.11 V C57
2021-10-28 23:33:56 s 1 +129200.64 5 +306474.01 9080.0 C57
2021-10-28 23:43:56 S 03 02 42.821 +26 35 16.19 V C57
2021-10-28 23:43:56 s 1 +128913.90 3 +306858.69 7330.0 C57
2021-10-28 23:44:32 C 03 03 46.37 +26 14 33.4 Y 557
2021-10-28 23:53:56 S 03 02 42.694 +26 35 23.28 V C57
2021-10-28 23:53:56 s 1 +128626.67 6 +307242.19 3990.0 C57
2021-10-29 00:13:56 S 03 02 42.562 +26 35 36.53 V C57
2021-10-29 00:13:56 s 1 +128050.77 3 +308005.68 2610.0 C57
2021-10-29 00:34:13 C 03 03 46.75 +26 15 05.6 Y 557
2021-10-29 00:43:56 S 03 02 42.300 +26 35 54.89 V C57
2021-10-29 00:43:56 s 1 +127183.33 1 +309142.12 3850.0 C57
2021-10-29 01:03:56 S 03 02 42.118 +26 36 08.42 V C57
2021-10-29 01:03:56 s 1 +126602.66 8 +309893.89 6980.0 C57
2021-10-29 01:13:56 S 03 02 42.072 +26 36 14.18 V C57
2021-10-29 01:13:56 s 1 +126311.63 2 +310268.03 1250.0 C57
2021-10-29 01:23:56 S 03 02 41.966 +26 36 21.35 V C57
2021-10-29 01:23:56 s 1 +126020.12 9 +310641.00 4010.0 C57
2021-10-29 01:33:56 S 03 02 41.849 +26 36 28.19 V C57
2021-10-29 01:33:56 s 1 +125728.16 2 +311012.80 5250.0 C57
2021-10-29 01:43:56 S 03 02 41.719 +26 36 33.59 V C57
2021-10-29 01:43:56 s 1 +125435.73 2 +311383.44 5000.0 C57
2021-10-29 01:48:04 C 03 03 47.37 +26 15 52.4 Y 557
2021-10-29 01:53:56 S 03 02 41.590 +26 36 40.68 V C57
2021-10-29 01:53:56 s 1 +125142.84 1 +311752.91 3240.0 C57
2021-10-29 02:13:56 S 03 02 41.537 +26 36 52.70 V C57
2021-10-29 02:13:56 s 1 +124555.68 6 +312488.37 5270.0 C57
2021-10-29 02:23:56 S 03 02 41.398 +26 36 58.07 V C57
2021-10-29 02:23:56 s 1 +124261.42 5 +312854.35 9070.0 C57
2021-10-29 02:33:56 S 03 02 41.270 +26 37 07.68 V C57
2021-10-29 02:33:56 s 1 +123966.71 2 +313219.18 1400.0 C57
2021-10-29 02:43:56 S 03 02 41.215 +26 37 11.10 V C57
2021-10-29 02:43:56 s 1 +123671.54 8 +313582.84 2260.0 C57
2021-10-29 02:49:03 C 03 03 47.97 +26 16 30.4 Y 557
2021-10-29 02:53:56 S 03 02 41.122 +26 37 16.68 V C57
2021-10-29 02:53:56 s 1 +123375.93 5 +313945.34 1670.0 C57
2021-10-29 03:13:56 S 03 02 40.944 +26 37 31.08 V C57
2021-10-29 03:13:56 s 1 +122783.37 1 +314666.88 6150.0 C57
2021-10-29 03:23:56 S 03 02 40.766 +26 37 37.31 V C57
2021-10-29 03:23:56 s 1 +122486.42 4 +315025.91 1230.0 C57
2021-10-29 03:43:56 S 03 02 40.639 +26 37 50.56 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)