164121 (2003 YT1)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2920665159 ± 2.00e+00
Semi-major axis (a)1.1099182345 AU ± 3.00e+00
Inclination (i)44.05771177° ± 4.00e+00
Long. of Asc. Node (Ω)38.31022261° ± 5.00e+00
Arg. of Perihelion (ω)91.00605506° ± 6.00e+00
Mean Anomaly (M)212.28626562° ± 1.15e-06
Mean Motion (n)0.8428995009°/day ± 3.42e+00
Perihelion dist (q)0.78574828 AU ± 3.07e+00
Aphelion dist (Q)1.43408819 AU ± 4.47e+00
Orbital Period1.16932835 yr ± 4.74e+00
NGA Modelr2
A2-3.93312334e-06 AU/d²
Physical Parameters
H (abs. magnitude)16.15
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-29
RMS Residual0.005″
Uncertainty0
Orbit TypeApollo
MOID0.002485 AU
Observations Used1832
Gaia Obs Used128
Oppositions5
Arc Total1982-2017
First Observation Used1982-11-19
Last Observation Used2025-07-16
Observations (2354)
Date Type RA Dec Mag Band Observatory
2016-10-29 22:44:00 C 05 39 36.94 +25 04 49.3 q Z80
2016-10-29 22:46:33 C 05 39 36.83 +25 06 39.3 q Z80
2016-10-29 22:58:26 C 05 39 36.49 +25 15 53.9 q 157
2016-10-29 22:58:40 C 05 39 36.48 +25 16 04.2 q 157
2016-10-29 22:58:54 C 05 39 36.46 +25 16 14.9 q 157
2016-10-29 22:58:55 C 05 39 36.32 +25 15 34.7 q Z80
2016-10-29 22:59:09 C 05 39 36.44 +25 16 25.5 q 157
2016-10-29 22:59:24 C 05 39 36.43 +25 16 35.9 q 157
2016-10-29 22:59:38 C 05 39 36.43 +25 16 46.3 q 157
2016-10-29 22:59:52 C 05 39 36.41 +25 16 56.5 q 157
2016-10-29 23:02:13 C 05 39 36.18 +25 17 57.7 q Z80
2016-10-29 23:05:14 C 05 39 36.05 +25 20 08.9 q Z80
2016-10-29 23:08:13 C 05 39 35.46 +25 22 26.1 o K85
2016-10-29 23:08:20 C 05 39 35.91 +25 22 23.5 q Z80
2016-10-29 23:11:44 C 05 39 35.77 +25 24 51.4 q Z80
2016-10-29 23:15:28 C 05 39 35.60 +25 27 33.1 q Z80
2016-10-29 23:17:58 C 05 39 35.50 +25 29 21.9 q Z80
2016-10-29 23:22:54 C 05 39 35.27 +25 32 57.2 q Z80
2016-10-29 23:25:52 C 05 39 35.13 +25 35 06.2 q Z80
2016-10-29 23:29:14 C 05 39 34.96 +25 37 33.7 q Z80
2016-10-29 23:32:46 C 05 39 34.79 +25 40 08.0 q Z80
2016-10-29 23:35:55 C 05 39 34.64 +25 42 25.1 q Z80
2016-10-29 23:36:12 C 05 39 34.02 +25 42 45.8 o K85
2016-10-29 23:38:48 C 05 39 34.49 +25 44 31.6 q Z80
2016-10-29 23:41:23 C 05 39 34.37 +25 46 24.3 q Z80
2016-10-29 23:54:11 C 05 39 33.00 +25 55 54.4 o K85
2016-10-30 02:15:14 C 05 39 22.96 +27 40 39.3 q K74
2016-10-30 02:25:21 C 05 39 22.21 +27 48 16.5 q K74
2016-10-30 02:45:23 C 05 39 20.71 +28 03 25.8 q K74
2016-10-30 02:47:21 C 05 39 20.56 +28 04 54.6 q K74
2016-10-30 03:30:58 C 05 39 16.81 +28 38 28.0 q 160
2016-10-30 03:32:36 C 05 39 16.61 +28 39 42.5 q 160
2016-10-30 03:34:13 C 05 39 16.53 +28 40 56.6 q 160
2016-10-30 19:21:18 C 05 38 59.02 +41 54 33.2 c K40
2016-10-30 19:26:12 C 05 38 58.88 +41 59 02.6 c K40
2016-10-30 19:46:32 C 05 38 57.44 +42 17 31.0 o K85
2016-10-30 20:03:33 C 05 38 56.82 +42 33 05.3 o K85
2016-10-30 20:22:32 C 05 38 56.09 +42 50 32.7 o K85
2016-10-30 21:40:56 C 05 38 52.13 +44 03 07.6 c K40
2016-10-30 21:43:47 C 05 38 51.97 +44 05 45.7 c K40
2016-10-30 21:50:53 C 05 38 51.40 +44 12 21.3 c K40
2016-10-30 21:53:19 C 05 38 51.21 +44 14 37.0 c K40
2016-10-30 22:00:32 C 05 38 46.38 +44 22 22.5 11.1 q L71
2016-10-30 22:01:56 C 05 38 46.22 +44 23 39.6 11.2 q L71
2016-10-30 22:03:19 C 05 38 46.06 +44 24 58.5 11.2 q L71
2016-10-30 23:38:55 C 05 38 43.39 +45 53 03.2 q B92
2016-10-30 23:40:26 C 05 38 43.20 +45 54 29.1 q B92
2016-10-30 23:43:28 C 05 38 42.93 +45 57 19.7 q B92
2016-10-30 23:53:09 C 05 38 41.91 +46 06 24.2 q B92
2016-10-30 23:54:29 C 05 38 41.79 +46 07 39.1 q B92
Radar Observations (11)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2004-05-01 23:42:00 74474126.77 2 us 2380 -1 -1
2004-05-02 21:44:00 77993481.53 2 us 2380 -1 -1
2004-05-02 21:44:00 -133764.851 2 Hz 2380 -1 -1
2016-10-27 07:40:00 66299207 4 us 8560 -14 -14
2016-10-28 07:00:00 55251316 2 us 8560 -14 -14
2016-10-28 08:28:00 54572031.44 1 us 2380 -1 -1
2016-10-29 10:30:00 43996004.17 1 us 8560 -14 -14
2016-10-31 05:40:00 34741188.135 1 us 8560 -14 -14
2023-11-01 05:30:00 66728692 10 us 8560 -14 -14
2023-11-01 06:10:00 66557486 2 us 8560 -14 -14
2023-11-07 05:10:00 77097307 1 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)