277475 (2005 WK4)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2373105312 ± 9.46e-08
Semi-major axis (a)1.0105180071 AU ± 4.79e-09
Inclination (i)9.84362787° ± 6.82e-06
Long. of Asc. Node (Ω)138.10953511° ± 4.66e-06
Arg. of Perihelion (ω)74.13737467° ± 7.93e-06
Mean Anomaly (M)111.39214008° ± 4.21e-05
Mean Motion (n)0.9702780144°/day ± 6.90e-09
Perihelion dist (q)0.77071144 AU ± 9.57e-08
Aphelion dist (Q)1.25032457 AU ± 9.58e-08
Orbital Period1.01581842 yr ± 7.23e-09
Physical Parameters
H (abs. magnitude)20.22
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual1.403″
Uncertainty0
Orbit TypeApollo
MOID0.002448 AU
Observations Used286
Radar Obs Used12
Oppositions1
Arc Total2005-2014
First Observation Used2005-11-27
Last Observation Used2014-08-12
Observations (325)
Date Type RA Dec Mag Band Observatory
2013-08-04 23:29:28 C 04 34 17.59 +49 25 03.0 o B67
2013-08-05 00:18:00 C 04 33 08.56 +49 17 50.7 o B67
2013-08-05 00:29:38 C 04 32 53.99 +49 16 30.9 q 470
2013-08-05 00:29:54 C 04 32 51.39 +49 16 05.3 o B67
2013-08-05 00:30:54 C 04 32 51.98 +49 16 18.7 q 470
2013-08-05 00:41:48 C 04 32 34.17 +49 14 18.3 o B67
2013-08-05 00:57:04 C 04 32 12.11 +49 12 01.7 o B67
2013-08-05 01:11:43 C 04 31 50.53 +49 09 49.7 o B67
2013-08-05 01:23:36 C 04 31 33.05 +49 08 01.5 o B67
2013-08-05 01:35:30 C 04 31 15.50 +49 06 13.4 o B67
2013-08-05 02:27:46 C 04 29 56.33 +48 59 07.6 t A79
2013-08-05 02:28:47 C 04 29 54.63 +48 58 58.7 t A79
2013-08-05 02:30:03 C 04 29 52.64 +48 58 46.6 t A79
2013-08-06 23:27:45 C 03 21 23.58 +38 12 50.2 o B67
2013-08-06 23:31:16 C 03 21 18.22 +38 11 46.3 o B67
2013-08-06 23:34:53 C 03 21 12.71 +38 10 40.1 o B67
2013-08-06 23:38:42 C 03 21 06.86 +38 09 30.0 o B67
2013-08-07 00:16:44 C 03 20 08.02 +37 57 41.8 o B67
2013-08-07 00:20:13 C 03 20 02.58 +37 56 37.4 o B67
2013-08-07 00:23:42 C 03 19 57.09 +37 55 31.8 o B67
2013-08-07 00:38:32 C 03 19 34.00 +37 50 55.5 o B67
2013-08-07 00:42:01 C 03 19 28.62 +37 49 51.0 o B67
2013-08-07 00:45:29 C 03 19 23.25 +37 48 45.4 o B67
2013-08-07 00:56:45 C 03 19 06.82 +37 45 48.8 q 470
2013-08-07 00:57:10 C 03 19 06.23 +37 45 41.9 q 470
2013-08-08 03:50:03 C 02 38 36.35 +27 45 12.1 q Z81
2013-08-08 04:10:17 C 02 38 04.95 +27 36 50.6 q Z81
2013-08-08 04:30:47 C 02 37 33.11 +27 28 20.0 q Z81
2013-08-09 08:56:50 C 01 58 41.19 +14 44 42.6 H06
2013-08-09 09:02:11 C 01 58 33.86 +14 42 16.0 H06
2013-08-09 22:35:02 C 01 41 43.18 +08 26 36.8 13.9 c 583
2013-08-09 22:37:31 C 01 41 40.13 +08 25 30.0 13.7 c 583
2013-08-09 22:38:15 C 01 41 39.17 +08 25 09.3 13.8 c 583
2013-08-09 22:39:45 C 01 41 37.33 +08 24 28.9 13.9 c 583
2013-08-09 22:40:46 C 01 41 36.07 +08 24 01.5 13.8 c 583
2013-08-09 22:41:45 C 01 41 34.83 +08 23 34.8 14.0 c 583
2013-08-09 22:43:07 C 01 41 33.20 +08 22 57.7 13.9 c 583
2013-08-09 22:46:07 C 01 41 29.36 +08 21 35.9 13.8 c 583
2013-08-09 22:50:07 C 01 41 24.37 +08 19 47.0 13.6 c 583
2013-08-09 22:51:46 C 01 41 22.34 +08 19 03.4 13.7 c 583
2013-08-09 22:55:45 C 01 41 17.36 +08 17 15.3 13.7 c 583
2013-08-09 23:07:05 C 01 41 03.27 +08 12 09.4 13.7 c 583
2013-08-09 23:42:29 C 01 40 18.14 +07 56 05.5 15.8 u 089
2013-08-09 23:44:59 C 01 40 14.99 +07 54 57.3 13.5 u 089
2013-08-09 23:47:30 C 01 40 11.83 +07 53 49.2 13.7 u 089
2013-08-09 23:50:02 C 01 40 08.65 +07 52 41.2 13.6 u 089
2013-08-09 23:52:34 C 01 40 05.44 +07 51 31.8 13.5 u 089
2013-08-09 23:55:06 C 01 40 02.24 +07 50 23.5 13.7 u 089
2013-08-10 00:02:18 C 01 39 53.18 +07 47 08.3 13.6 u 089
2013-08-10 00:10:44 C 01 39 42.52 +07 43 20.3 13.7 u 089
Radar Observations (12)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2012-07-23 10:47:00 27226.5106 0.4 Hz 2380 -1 -1
2013-08-03 11:30:00 393710.727 1.5 Hz 8560 -14 -14
2013-08-03 11:40:00 34394368.79 10 us 8560 -14 -14
2013-08-03 12:10:00 34311765.95 1 us 8560 -14 -14
2013-08-05 10:20:00 328621.45 0.5 Hz 8560 -14 -14
2013-08-05 10:30:00 27477333.91 1 us 8560 -14 -14
2013-08-05 11:30:00 27340102.75 0.5 us 8560 -14 -14
2013-08-06 08:20:00 24822631.94 0.5 us 8560 -14 -14
2013-08-07 08:00:00 22542279.99 0.5 us 8560 -14 -14
2013-08-07 11:06:00 22275670.49 0.5 us 2380 -1 -1
2013-08-08 09:00:00 21033672.11 0.25 us 8560 -14 -14
2013-08-09 09:50:00 20662835.48 0.25 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)