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
2021-11-05 16:33:55 s 1 -148380.83 5 +38027.369 1950.0 C57
2021-11-05 16:35:55 C 03 06 47.31 +28 32 22.2 Y N42
2021-11-05 16:38:03 C 03 06 47.32 +28 32 24.2 Y N42
2021-11-05 16:40:10 C 03 06 47.33 +28 32 26.1 Y N42
2021-11-05 16:42:18 C 03 06 47.34 +28 32 28.0 Y N42
2021-11-05 16:43:55 S 03 05 16.200 +28 20 32.71 V C57
2021-11-05 16:43:55 s 1 -148012.05 8 +37029.467 2230.0 C57
2021-11-05 16:44:25 C 03 06 47.35 +28 32 30.0 Y N42
2021-11-05 16:53:55 S 03 05 16.956 +28 20 39.77 V C57
2021-11-05 16:53:55 s 1 -147638.24 7 +36030.303 4320.0 C57
2021-11-05 17:03:45 C 03 06 48.72 +28 32 36.9 V C40
2021-11-05 17:03:55 S 03 05 17.712 +28 20 48.12 V C57
2021-11-05 17:03:55 s 1 -147259.35 6 +35029.896 8070.0 C57
2021-11-05 17:08:27 C 03 06 48.78 +28 32 40.9 V C40
2021-11-05 17:13:55 S 03 05 18.578 +28 20 54.82 V C57
2021-11-05 17:13:55 s 1 -146875.34 2 +34028.267 3320.0 C57
2021-11-05 17:17:53 C 03 06 48.86 +28 32 49.7 V C40
2021-11-05 17:19:27 C 03 06 48.88 +28 32 51.3 V C40
2021-11-05 17:22:36 C 03 06 48.90 +28 32 54.1 V C40
2021-11-05 17:23:55 S 03 05 19.397 +28 21 02.20 V C57
2021-11-05 17:23:55 s 1 -146486.15 7 +33025.437 9900.0 C57
2021-11-05 17:28:53 C 03 06 48.96 +28 32 59.8 V C40
2021-11-05 17:33:37 C 03 06 49.01 +28 33 04.2 V C40
2021-11-05 17:33:55 S 03 05 20.170 +28 21 10.22 V C57
2021-11-05 17:33:55 s 1 -146091.75 4 +32021.428 7660.0 C57
2021-11-05 17:43:55 S 03 05 20.966 +28 21 18.36 V C57
2021-11-05 17:43:55 s 1 -145692.08 8 +31016.262 6420.0 C57
2021-11-05 17:53:55 S 03 05 21.758 +28 21 25.88 V C57
2021-11-05 17:53:55 s 1 -145287.10 9 +30009.961 6010.0 C57
2021-11-05 18:03:55 S 03 05 22.570 +28 21 33.16 V C57
2021-11-05 18:03:55 s 1 -144876.77 1 +29002.550 6280.0 C57
2021-11-05 18:13:55 S 03 05 23.383 +28 21 40.39 V C57
2021-11-05 18:13:55 s 1 -144461.02 4 +27994.053 7040.0 C57
2021-11-05 18:23:55 S 03 05 24.223 +28 21 48.71 V C57
2021-11-05 18:23:55 s 1 -144039.81 9 +26984.495 8120.0 C57
2021-11-05 18:33:55 S 03 05 24.996 +28 21 57.20 V C57
2021-11-05 18:33:55 s 1 -143613.10 7 +25973.902 9350.0 C57
2021-11-05 18:43:55 S 03 05 25.817 +28 22 04.87 V C57
2021-11-05 18:43:55 s 1 -143180.83 7 +24962.300 550.0 C57
2021-11-05 18:53:55 S 03 05 26.698 +28 22 11.78 V C57
2021-11-05 18:53:55 s 1 -142742.95 9 +23949.716 1540.0 C57
2021-11-05 19:03:55 S 03 05 27.528 +28 22 20.17 V C57
2021-11-05 19:03:55 s 1 -142299.42 2 +22936.180 2140.0 C57
2021-11-05 19:13:55 S 03 05 28.361 +28 22 29.28 V C57
2021-11-05 19:13:55 s 1 -141850.17 3 +21921.719 2180.0 C57
2021-11-05 19:23:55 S 03 05 29.177 +28 22 37.38 V C57
2021-11-05 19:23:55 s 1 -141395.16 2 +20906.363 1460.0 C57
2021-11-05 19:33:55 S 03 05 30.014 +28 22 44.69 V C57
2021-11-05 19:33:55 s 1 -140934.33 4 +19890.144 9800.0 C57
2021-11-05 19:43:55 S 03 05 30.902 +28 22 51.85 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)