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
2021-10-30 22:43:56 s 1 +34983.064 0 +371021.08 4440.0 C57
2021-10-30 22:53:56 S 03 02 23.206 +27 03 52.45 V C57
2021-10-30 22:53:56 s 1 +34622.169 0 +371097.94 1470.0 C57
2021-10-30 23:03:56 S 03 02 23.117 +27 03 57.60 V C57
2021-10-30 23:03:56 s 1 +34261.189 0 +371173.77 8300.0 C57
2021-10-30 23:13:56 S 03 02 23.066 +27 04 03.54 V C57
2021-10-30 23:13:56 s 1 +33900.124 0 +371248.57 4920.0 C57
2021-10-30 23:23:56 S 03 02 23.021 +27 04 10.02 V C57
2021-10-30 23:23:56 s 1 +33538.977 0 +371322.32 1340.0 C57
2021-10-30 23:33:56 S 03 02 22.982 +27 04 14.66 V C57
2021-10-30 23:33:56 s 1 +33177.748 0 +371395.05 7560.0 C57
2021-10-30 23:41:26 C 03 04 34.07 +26 47 00.1 Y 557
2021-10-30 23:43:56 S 03 02 22.975 +27 04 21.25 V C57
2021-10-30 23:43:56 s 1 +32816.437 0 +371466.73 3590.0 C57
2021-10-30 23:53:56 S 03 02 22.922 +27 04 26.04 V C57
2021-10-30 23:53:56 s 1 +32455.047 0 +371537.38 9440.0 C57
2021-10-31 00:03:56 S 03 02 22.922 +27 04 32.30 V C57
2021-10-31 00:03:56 s 1 +32093.578 0 +371606.99 5090.0 C57
2021-10-31 00:13:56 S 03 02 22.901 +27 04 38.35 V C57
2021-10-31 00:13:56 s 1 +31732.031 0 +371675.57 570.0 C57
2021-10-31 00:33:56 S 03 02 22.884 +27 04 49.48 V C57
2021-10-31 00:33:56 s 1 +31008.708 0 +371809.61 980.0 C57
2021-10-31 00:36:19 C 03 04 34.41 +26 47 37.8 Y 557
2021-10-31 00:43:56 S 03 02 22.750 +27 04 55.45 V C57
2021-10-31 00:43:56 s 1 +30646.935 0 +371875.08 5930.0 C57
2021-10-31 00:53:56 S 03 02 22.754 +27 05 00.20 V C57
2021-10-31 00:53:56 s 1 +30285.087 0 +371939.51 720.0 C57
2021-10-31 01:03:56 S 03 02 22.726 +27 05 06.32 V C57
2021-10-31 01:03:56 s 1 +29923.167 0 +372002.91 5330.0 C57
2021-10-31 01:13:56 S 03 02 22.685 +27 05 12.48 V C57
2021-10-31 01:13:56 s 1 +29561.175 0 +372065.28 9790.0 C57
2021-10-31 01:23:56 S 03 02 22.613 +27 05 17.99 V C57
2021-10-31 01:23:56 s 1 +29199.113 0 +372126.60 4090.0 C57
2021-10-31 01:31:12 C 03 04 34.80 +26 48 14.8 Y 557
2021-10-31 01:33:56 S 03 02 22.606 +27 05 23.53 V C57
2021-10-31 01:33:56 s 1 +28836.981 0 +372186.90 8240.0 C57
2021-10-31 01:43:56 S 03 02 22.565 +27 05 29.54 V C57
2021-10-31 01:43:56 s 1 +28474.780 0 +372246.15 2240.0 C57
2021-10-31 01:53:56 S 03 02 22.524 +27 05 35.41 V C57
2021-10-31 01:53:56 s 1 +28112.513 0 +372304.38 6090.0 C57
2021-10-31 02:03:56 S 03 02 22.447 +27 05 40.42 V C57
2021-10-31 02:03:56 s 1 +27750.179 0 +372361.56 9800.0 C57
2021-10-31 02:13:56 S 03 02 22.442 +27 05 46.21 V C57
2021-10-31 02:13:56 s 1 +27387.779 0 +372417.72 3370.0 C57
2021-10-31 02:23:56 S 03 02 22.380 +27 05 52.44 V C57
2021-10-31 02:23:56 s 1 +27025.315 0 +372472.84 6800.0 C57
2021-10-31 02:32:11 C 03 04 35.31 +26 48 55.2 Y 557
2021-10-31 02:33:56 S 03 02 22.411 +27 05 58.60 V C57
2021-10-31 02:33:56 s 1 +26662.788 0 +372526.92 110.0 C57
2021-10-31 02:43:56 S 03 02 22.310 +27 06 03.06 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)