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
2003-12-29 01:20:04 C 22 35 02.19 -00 57 52.3 o 715
2003-12-29 01:24:23 C 22 35 02.32 -00 57 42.6 o 715
2003-12-29 01:28:40 C 22 35 02.46 -00 57 33.3 o 715
2003-12-29 10:47:44 C 22 35 19.767 -00 36 30.64 r 413
2003-12-29 10:54:18 C 22 35 19.959 -00 36 15.97 r 413
2003-12-30 10:23:54 C 22 36 03.862 +00 16 06.34 r 413
2003-12-30 10:29:53 C 22 36 04.062 +00 16 19.67 r 413
2004-01-02 15:43:25 C 22 38 25.25 +03 05 50.1 o 084
2004-01-04 10:24:31 C 22 39 40.14 +04 38 19.9 r 413
2004-01-04 10:26:21 C 22 39 40.15 +04 38 23.8 r 413
2004-01-05 10:16:37 C 22 40 21.33 +05 29 26.3 r 413
2004-01-05 10:18:55 C 22 40 21.39 +05 29 31.2 r 413
2004-01-05 10:21:15 C 22 40 21.45 +05 29 35.9 r 413
2004-01-07 15:59:50 C 22 41 51.97 +07 22 59.3 o 084
2004-01-10 02:12:10 C 22 43 25.41 +09 24 23.3 r 448
2004-01-10 02:22:37 C 22 43 25.69 +09 24 45.2 r 448
2004-01-10 02:32:50 C 22 43 25.92 +09 25 06.2 r 448
2004-01-28 01:36:52 C 22 52 07.06 +23 23 17.4 r 448
2004-01-28 01:42:53 C 22 52 07.14 +23 23 28.1 r 448
2004-01-28 01:48:07 C 22 52 07.20 +23 23 37.7 r 448
2004-02-19 17:46:25 C 22 52 27.09 +38 20 31.9 o 084
2004-03-04 17:42:20 22 45 45.04 +45 48 24.0 o 084
2004-03-09 18:02:54 22 42 23.83 +48 08 21.1 o 084
2004-03-10 17:26:14 22 41 42.89 +48 34 25.9 o 084
2004-03-11 17:34:40 22 41 00.35 +49 00 59.8 o 084
2004-03-12 17:32:46 22 40 17.97 +49 27 02.5 o 084
2004-03-19 19:38:29 22 35 24.33 +52 24 30.1 o 084
2004-03-22 03:36:14 C 22 33 57.50 +53 21 19.1 o J95
2004-03-22 03:40:26 C 22 33 57.44 +53 21 23.6 o J95
2004-03-22 03:44:22 C 22 33 57.24 +53 21 27.6 o J95
2004-03-29 01:50:28 22 30 34.84 +56 12 34.4 o 084
2004-03-31 02:00:42 22 30 02.06 +57 05 06.5 o 084
2004-04-06 01:57:50 C 22 30 29.47 +60 01 32.1 o J95
2004-04-06 02:04:58 C 22 30 29.68 +60 01 41.8 o J95
2004-04-06 02:12:13 C 22 30 29.81 +60 01 52.6 o J95
2004-04-13 23:07:45 C 22 41 42.38 +65 37 27.5 o 084
2004-04-14 21:12:03 C 22 44 47.24 +66 31 31.1 c 056
2004-04-14 21:32:56 C 22 44 50.87 +66 32 25.7 c 056
2004-04-15 01:48:57 C 22 45 33.51 +66 43 40.1 o J95
2004-04-15 02:00:02 C 22 45 35.37 +66 44 09.8 o J95
2004-04-15 02:05:04 C 22 45 36.21 +66 44 23.5 o J95
2004-04-15 20:33:12 C 22 48 51.30 +67 34 12.2 c 056
2004-04-15 20:44:34 C 22 48 53.75 +67 34 44.4 c 056
2004-04-17 01:14:13 C 22 55 25.96 +69 00 20.0 o 084
2004-04-18 00:19:01 C 23 02 24.01 +70 17 21.2 o 084
2004-04-19 01:26:15 C 23 12 32.56 +71 50 49.6 o 084
2004-04-20 20:17:51 C 23 40 26.99 +74 54 40.8 c 639
2004-04-20 20:22:41 C 23 40 31.46 +74 55 03.4 c 639
2004-04-20 20:27:06 C 23 40 35.55 +74 55 23.4 c 639
2004-04-20 20:32:57 C 23 40 41.19 +74 55 51.3 c 639
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)