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
2016-11-07 21:27:37 C 17 43 23.46 +53 17 38.6 q Z52
2016-11-07 23:01:07 C 17 43 23.39 +53 08 27.9 q Z52
2016-11-09 19:15:43 C 17 42 57.36 +49 42 08.0 q K73
2016-11-09 21:10:17 C 17 42 57.37 +49 34 39.3 q Z80
2016-11-09 21:11:10 C 17 42 57.32 +49 34 35.5 q Z80
2016-11-09 21:12:02 C 17 42 57.40 +49 34 31.9 q Z80
2016-11-10 17:00:00 C 17 42 47.54 +48 25 30.8 q K73
2016-11-10 17:35:12 C 17 42 46.90 +48 23 32.3 q K73
2016-11-10 17:42:16 C 17 42 46.79 +48 23 08.0 q K73
2016-11-10 22:11:48 C 17 42 45.48 +48 08 17.6 q Z80
2016-11-10 22:13:18 C 17 42 45.51 +48 08 13.4 q Z80
2016-11-11 10:04:11 C 17 42 38.48 +47 33 05.8 o 300
2016-11-11 10:05:21 C 17 42 38.43 +47 33 02.4 o 300
2016-11-11 10:06:10 C 17 42 38.40 +47 33 00.2 o 300
2016-11-11 10:06:58 C 17 42 38.46 +47 32 57.3 o 300
2016-11-11 10:07:47 C 17 42 38.40 +47 32 54.9 o 300
2016-11-11 10:08:36 C 17 42 38.42 +47 32 52.8 o 300
2016-11-11 10:10:12 C 17 42 38.41 +47 32 47.2 o 300
2016-11-14 18:34:14 C 17 41 58.00 +44 29 14.8 q K74
2016-11-14 18:35:21 C 17 41 57.98 +44 29 12.6 q K74
2016-11-14 18:40:30 C 17 41 57.92 +44 29 03.1 q K74
2016-11-14 18:42:44 C 17 41 57.89 +44 28 59.1 q K74
2016-11-16 17:26:36 C 17 41 31.10 +43 12 52.2 q K73
2016-11-16 17:34:47 C 17 41 30.96 +43 12 39.5 q K73
2016-11-24 18:59:24 C 17 39 19.40 +39 38 29.1 q Z49
2016-11-24 19:06:12 C 17 39 19.28 +39 38 23.8 q Z49
2016-11-28 18:23:51 C 17 38 02.97 +38 18 55.2 q Z49
2016-11-28 18:38:52 C 17 38 02.76 +38 18 42.6 q Z49
2016-11-29 17:14:05 C 17 37 43.90 +38 00 50.6 q Z52
2016-11-29 18:26:07 C 17 37 42.76 +37 59 51.7 q Z52
2016-11-29 19:35:29 C 17 37 41.78 +37 58 54.2 q Z52
2016-12-04 18:10:50 C 17 35 59.15 +36 26 54.3 q Z52
2016-12-04 19:06:55 C 17 35 58.34 +36 26 09.3 q Z52
2016-12-04 19:40:32 C 17 35 57.89 +36 25 42.1 q Z52
2017-01-27 05:25:18 C 17 43 18.26 +11 19 48.8 q K74
2017-01-27 05:40:03 C 17 43 18.74 +11 19 25.6 q K74
2017-05-03 22:46:57 S 22 55 35.465 -61 20 43.73 L C51
2017-05-03 22:47:08 S 22 55 35.453 -61 20 43.91 L C51
2017-05-04 01:55:38 S 22 56 31.567 -61 24 24.84 L C51
2017-05-04 05:04:19 S 22 57 27.838 -61 28 05.02 L C51
2017-05-04 08:12:49 S 22 58 23.995 -61 31 42.46 L C51
2017-05-04 14:30:11 S 23 00 16.98 -61 38 56.7 L C51
2017-05-04 17:38:42 S 23 01 13.62 -61 42 32.0 L C51
2017-05-04 20:47:23 S 23 02 10.46 -61 46 05.1 L C51
2017-05-04 22:21:37 S 23 02 38.863 -61 47 51.54 L C51
2017-05-04 23:55:52 S 23 03 07.26 -61 49 38.0 L C51
2017-05-05 01:30:07 S 23 03 35.68 -61 51 23.6 L C51
2017-05-05 01:30:19 S 23 03 35.56 -61 51 23.6 L C51
2017-05-05 06:13:03 S 23 05 01.109 -61 56 39.19 L C51
2017-05-05 07:47:19 S 23 05 29.63 -61 58 23.3 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)