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
2018-05-13 07:00:53 C 09 05 41.96 +21 16 31.9 U T05
2018-05-13 07:16:39 C 09 05 44.95 +21 14 29.2 U T05
2018-05-13 07:17:19 C 09 05 45.08 +21 14 24.1 U T05
2018-05-13 07:32:33 C 09 05 47.97 +21 12 25.5 U T05
2018-05-13 07:33:13 C 09 05 48.09 +21 12 20.4 U T05
2018-05-13 07:48:25 C 09 05 50.97 +21 10 22.2 U T05
2018-05-13 07:49:04 C 09 05 51.10 +21 10 17.0 U T05
2018-05-13 08:05:20 C 09 05 54.19 +21 08 10.5 U T05
2018-05-13 20:20:51 C 09 08 15.75 +19 33 50.9 q K73
2018-05-13 20:23:42 C 09 08 16.26 +19 33 28.8 q K73
2018-05-13 20:29:27 C 09 08 17.35 +19 32 45.1 q K73
2018-05-13 20:35:55 C 09 08 18.55 +19 31 55.5 q K73
2018-05-13 20:42:45 C 09 08 19.81 +19 31 02.9 q K73
2018-05-13 20:49:47 C 09 08 21.10 +19 30 09.3 q K73
2018-05-14 04:39:37 C 09 09 48.45 +18 30 53.6 U 703
2018-05-14 04:47:59 C 09 09 50.00 +18 29 49.8 U 703
2018-05-14 04:56:21 C 09 09 51.45 +18 28 46.8 U 703
2018-05-14 06:23:34 C 09 10 07.86 +18 17 59.0 U T05
2018-05-14 06:51:36 C 09 10 12.78 +18 14 27.6 U T05
2018-05-14 07:11:17 C 09 10 16.24 +18 11 59.1 U T05
2018-05-14 07:36:21 C 09 10 20.64 +18 08 50.1 U T05
2018-05-15 03:57:07 C 09 13 57.02 +15 38 13.2 U 703
2018-05-15 04:04:38 C 09 13 58.27 +15 37 18.0 U 703
2018-05-15 04:12:08 C 09 13 59.52 +15 36 23.5 U 703
2018-05-15 04:19:39 C 09 14 00.77 +15 35 28.5 U 703
2018-05-15 05:38:58 C 09 14 14.94 +15 26 00.2 U T08
2018-05-15 05:46:43 C 09 14 16.19 +15 25 04.1 U T08
2018-05-15 05:57:08 C 09 14 17.88 +15 23 48.0 U T08
2018-05-15 06:13:45 C 09 14 20.59 +15 21 47.1 U T08
2018-05-15 20:15:29 C 09 16 41.27 +13 40 54.6 q K73
2018-05-15 20:23:17 C 09 16 42.55 +13 39 58.9 q K73
2018-05-15 20:31:06 C 09 16 43.80 +13 39 03.8 q K73
2018-05-15 20:38:55 C 09 16 45.03 +13 38 07.9 q K73
2018-05-15 20:46:43 C 09 16 46.29 +13 37 12.3 q K73
2018-05-17 03:58:23 C 09 21 40.99 +10 02 17.7 U 703
2018-05-17 04:05:54 C 09 21 42.07 +10 01 27.9 U 703
2018-05-17 04:13:25 C 09 21 43.15 +10 00 36.8 U 703
2018-05-17 04:20:56 C 09 21 44.24 +09 59 46.9 U 703
2018-05-20 03:31:49 C 09 31 35.65 +02 36 26.9 U 703
2018-05-20 03:39:26 C 09 31 36.58 +02 35 43.1 U 703
2018-05-20 03:47:01 C 09 31 37.50 +02 34 59.1 U 703
2018-05-20 03:54:38 C 09 31 38.43 +02 34 15.3 U 703
2018-05-22 06:25:34 C 09 37 43.67 -02 00 40.7 U T08
2018-05-22 06:39:55 C 09 37 45.23 -02 01 54.2 U T08
2018-05-22 06:55:35 C 09 37 46.94 -02 03 14.2 U T08
2018-05-22 07:10:07 C 09 37 48.51 -02 04 29.0 U T08
2018-05-24 03:28:02 C 09 42 39.77 -05 40 15.2 U 703
2018-05-24 03:35:58 C 09 42 40.52 -05 40 52.1 U 703
2018-05-24 03:43:53 C 09 42 41.29 -05 41 28.6 U 703
2018-05-24 03:51:48 C 09 42 42.12 -05 42 05.0 U 703
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)