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
2011-05-06 00:14:35 C 08 43 00.48 +33 48 05.2 c H78
2011-05-06 00:15:19 C 08 43 00.67 +33 47 56.4 c H78
2011-05-06 00:16:46 C 08 43 01.11 +33 47 38.6 c H78
2011-05-06 00:17:30 C 08 43 01.28 +33 47 29.9 c H78
2011-05-06 00:18:14 C 08 43 01.52 +33 47 20.6 c H78
2011-05-06 00:18:57 C 08 43 01.71 +33 47 11.7 c H78
2011-05-06 00:19:41 C 08 43 01.94 +33 47 03.1 c H78
2011-05-06 00:20:25 C 08 43 02.14 +33 46 54.2 c H78
2011-05-06 00:21:08 C 08 43 02.36 +33 46 44.8 c H78
2011-05-06 00:21:52 C 08 43 02.60 +33 46 36.5 c H78
2011-05-06 00:22:36 C 08 43 02.75 +33 46 27.6 c H78
2011-05-06 00:23:20 C 08 43 02.96 +33 46 18.1 c H78
2011-05-06 00:24:06 C 08 43 03.21 +33 46 09.0 c H78
2011-05-06 00:24:51 C 08 43 03.40 +33 46 00.0 c H78
2011-05-06 00:25:34 C 08 43 03.63 +33 45 51.3 c H78
2011-05-06 00:26:18 C 08 43 03.83 +33 45 41.9 c H78
2011-05-06 00:27:02 C 08 43 04.02 +33 45 33.5 c H78
2011-05-06 00:27:45 C 08 43 04.24 +33 45 24.2 c H78
2011-05-06 00:29:13 C 08 43 04.65 +33 45 06.7 c H78
2011-05-06 00:29:58 C 08 43 04.89 +33 44 57.0 c H78
2011-05-07 20:35:05 C 08 55 02.26 +24 55 02.7 o 639
2011-05-07 20:38:15 C 08 55 03.00 +24 54 25.4 o 639
2011-05-07 20:46:05 C 08 55 04.86 +24 52 53.2 o 639
2011-05-07 20:50:04 C 08 55 05.80 +24 52 06.2 o 639
2011-05-07 20:54:04 C 08 55 06.74 +24 51 18.9 o 639
2011-05-07 21:01:04 C 08 55 08.42 +24 49 56.6 o 639
2015-08-27 03:43:40 C 06 17 00.40 +21 44 25.9 q 160
2015-08-27 03:45:38 C 06 17 00.74 +21 44 28.3 q 160
2015-08-27 03:47:35 C 06 17 01.12 +21 44 31.3 q 160
2015-08-28 03:27:58 C 06 21 25.48 +22 19 27.1 q 160
2015-08-28 03:30:54 C 06 21 26.01 +22 19 31.6 q 160
2015-08-28 03:33:51 C 06 21 26.58 +22 19 36.3 q 160
2015-09-21 03:12:13 C 08 42 12.55 +34 21 15.0 q 160
2015-09-21 03:14:57 C 08 42 13.40 +34 21 16.8 q 160
2015-09-21 03:17:43 C 08 42 14.21 +34 21 18.9 q 160
2016-08-24 23:40:45 S 04 49 09.578 -30 56 51.58 L C51
2016-08-30 10:10:53 S 04 56 22.894 -30 47 23.93 L C51
2016-08-30 13:19:34 S 04 56 33.10 -30 47 10.7 L C51
2016-08-30 16:28:15 S 04 56 43.12 -30 46 58.7 L C51
2016-08-30 19:36:56 S 04 56 53.21 -30 46 45.2 L C51
2016-08-30 22:45:38 S 04 57 03.20 -30 46 32.3 L C51
2016-08-31 01:54:08 S 04 57 13.15 -30 46 19.5 L C51
2016-08-31 01:54:19 S 04 57 13.17 -30 46 19.1 L C51
2016-08-31 03:28:34 S 04 57 18.17 -30 46 11.5 L C51
2016-08-31 05:02:49 S 04 57 23.21 -30 46 06.6 L C51
2016-08-31 06:37:14 S 04 57 28.188 -30 46 00.26 L C51
2016-08-31 08:11:29 S 04 57 33.127 -30 45 54.00 L C51
2016-08-31 11:20:11 S 04 57 43.140 -30 45 41.11 L C51
2016-08-31 12:54:37 S 04 57 48.20 -30 45 34.5 L C51
2016-08-31 14:28:52 S 04 57 53.12 -30 45 28.1 L C51
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)