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
2021-10-27 08:23:59 C 03 03 05.21 +25 49 29.5 V 703
2021-10-27 08:24:02 C 03 03 05.21 +25 49 29.6 V G96
2021-10-27 08:31:39 C 03 03 05.26 +25 49 34.3 V 703
2021-10-27 08:32:17 C 03 03 05.26 +25 49 34.7 V G96
2021-10-27 08:33:56 S 03 03 05.621 +26 07 58.84 V C57
2021-10-27 08:33:56 s 1 +176800.84 2 +181711.13 7710.0 C57
2021-10-27 08:42:47 C 03 03 05.34 +25 49 41.3 V G96
2021-10-27 08:43:56 S 03 03 05.549 +26 08 06.22 V C57
2021-10-27 08:43:56 s 1 +176715.41 0 +182403.59 3850.0 C57
2021-10-27 08:53:56 S 03 03 05.412 +26 08 15.22 V C57
2021-10-27 08:53:56 s 1 +176628.54 7 +183094.57 5190.0 C57
2021-10-27 08:56:32 C 03 03 05.45 +25 49 49.9 V V00
2021-10-27 09:03:32 C 03 03 05.49 +25 49 54.2 V V00
2021-10-27 09:03:56 S 03 03 05.359 +26 08 21.37 V C57
2021-10-27 09:03:56 s 1 +176540.26 1 +183784.07 1770.0 C57
2021-10-27 09:10:31 C 03 03 05.53 +25 49 58.5 V V00
2021-10-27 09:13:56 S 03 03 05.237 +26 08 30.26 V C57
2021-10-27 09:13:56 s 1 +176450.56 0 +184472.09 3600.0 C57
2021-10-27 09:23:56 S 03 03 05.148 +26 08 37.50 V C57
2021-10-27 09:23:56 s 1 +176359.45 0 +185158.64 720.0 C57
2021-10-27 09:33:56 S 03 03 05.023 +26 08 44.48 V C57
2021-10-27 09:33:56 s 1 +176266.93 9 +185843.71 3140.0 C57
2021-10-27 09:43:56 S 03 03 04.877 +26 08 53.84 V C57
2021-10-27 09:43:56 s 1 +176173.03 5 +186527.30 900.0 C57
2021-10-27 09:53:56 S 03 03 04.802 +26 08 59.71 V C57
2021-10-27 09:53:56 s 1 +176077.74 5 +187209.43 4020.0 C57
2021-10-27 10:03:56 S 03 03 04.771 +26 09 07.16 V C57
2021-10-27 10:03:56 s 1 +175981.07 5 +187890.08 2530.0 C57
2021-10-27 10:13:56 S 03 03 04.586 +26 09 15.12 V C57
2021-10-27 10:13:56 s 1 +175883.03 4 +188569.26 6440.0 C57
2021-10-27 10:23:56 S 03 03 04.524 +26 09 21.28 V C57
2021-10-27 10:23:56 s 1 +175783.62 8 +189246.98 5780.0 C57
2021-10-27 10:33:56 S 03 03 04.478 +26 09 29.56 V C57
2021-10-27 10:33:56 s 1 +175682.86 5 +189923.23 580.0 C57
2021-10-27 10:43:56 S 03 03 04.368 +26 09 38.66 V C57
2021-10-27 10:43:56 s 1 +175580.75 1 +190598.02 860.0 C57
2021-10-27 10:53:56 S 03 03 04.315 +26 09 45.32 V C57
2021-10-27 10:53:56 s 1 +175477.29 4 +191271.34 6650.0 C57
2021-10-27 11:03:56 S 03 03 04.301 +26 09 53.17 V C57
2021-10-27 11:03:56 s 1 +175372.50 0 +191943.20 7960.0 C57
2021-10-27 11:13:56 S 03 03 04.207 +26 10 00.26 V C57
2021-10-27 11:13:56 s 1 +175266.37 7 +192613.61 4820.0 C57
2021-10-27 11:23:56 S 03 03 04.073 +26 10 07.50 V C57
2021-10-27 11:23:56 s 1 +175158.93 1 +193282.55 7260.0 C57
2021-10-27 11:33:56 S 03 03 03.895 +26 10 15.56 V C57
2021-10-27 11:33:56 s 1 +175050.16 8 +193950.04 5300.0 C57
2021-10-27 11:43:56 S 03 03 03.876 +26 10 23.27 V C57
2021-10-27 11:43:56 s 1 +174940.09 7 +194616.07 8950.0 C57
2021-10-27 11:53:56 S 03 03 03.708 +26 10 30.07 V C57
2021-10-27 11:53:56 s 1 +174828.72 3 +195280.64 8250.0 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)