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
1982-11-19 10:19:17 21 57 16.94 -20 40 44.9 g 413
1982-11-19 10:34:16 21 57 15.50 -20 39 39.0 g 413
1982-11-19 10:54:10 21 57 13.58 -20 38 12.3 g 413
1982-11-19 11:09:10 21 57 12.15 -20 37 06.4 g 413
1983-04-19 18:29:50 20 24 07.68 -44 07 19.3 g 413
1983-04-19 18:44:49 20 24 09.72 -44 08 37.8 g 413
1983-04-19 18:59:49 20 24 11.58 -44 09 57.8 g 413
1983-04-19 19:14:50 20 24 13.66 -44 11 16.3 g 413
2003-12-18 01:27:06 C 22 26 25.63 -11 11 29.5 d 703
2003-12-18 01:38:30 C 22 26 25.93 -11 11 03.0 d 703
2003-12-18 01:49:56 C 22 26 26.29 -11 10 33.9 d 703
2003-12-18 02:01:28 C 22 26 26.65 -11 10 06.8 d 703
2003-12-18 03:10:43 C 22 26 28.80 -11 07 20.2 d 703
2003-12-18 03:12:23 C 22 26 28.83 -11 07 15.7 d 703
2003-12-18 03:14:03 C 22 26 28.89 -11 07 11.8 d 703
2003-12-18 03:15:40 C 22 26 28.96 -11 07 08.0 d 703
2003-12-18 03:37:52 C 22 26 29.69 -11 06 13.8 c 854
2003-12-18 03:47:23 C 22 26 30.01 -11 05 51.4 c 854
2003-12-18 03:56:54 C 22 26 30.26 -11 05 28.7 c 854
2003-12-18 16:49:45 C 22 26 56.48 -10 34 34.6 r 557
2003-12-18 16:51:55 C 22 26 56.53 -10 34 29.4 r 557
2003-12-18 16:54:07 C 22 26 56.61 -10 34 24.2 r 557
2003-12-18 16:56:19 C 22 26 56.68 -10 34 18.9 r 557
2003-12-18 16:58:29 C 22 26 56.75 -10 34 13.5 r 557
2003-12-18 17:17:14 C 22 26 57.25 -10 33 28.6 c 246
2003-12-18 17:18:30 C 22 26 57.34 -10 33 25.3 c 246
2003-12-18 17:19:45 C 22 26 57.40 -10 33 22.2 c 246
2003-12-18 17:20:45 C 22 26 57.42 -10 33 19.5 c 246
2003-12-18 17:22:05 C 22 26 57.46 -10 33 16.8 c 246
2003-12-18 17:23:27 C 22 26 57.50 -10 33 13.6 c 246
2003-12-18 17:24:35 C 22 26 57.55 -10 33 10.6 c 246
2003-12-19 01:29:22 C 22 27 13.67 -10 13 46.8 17.9 c 704
2003-12-19 01:31:28 C 22 27 13.72 -10 13 42.0 17.8 c 704
2003-12-19 01:48:19 C 22 27 14.24 -10 13 01.8 18.1 c 704
2003-12-19 01:49:22 C 22 27 14.33 -10 12 59.2 m 333
2003-12-19 01:50:50 C 22 27 14.34 -10 12 54.8 18.2 c 704
2003-12-19 01:52:12 C 22 27 14.41 -10 12 52.7 m 333
2003-12-19 01:54:55 C 22 27 14.49 -10 12 45.8 m 333
2003-12-19 02:07:30 C 22 27 14.87 -10 12 15.2 17.8 c 704
2003-12-19 02:09:49 C 22 27 14.93 -10 12 09.8 18.0 c 704
2003-12-19 02:26:50 C 22 27 15.45 -10 11 29.0 17.7 c 704
2003-12-19 02:28:57 C 22 27 15.44 -10 11 23.7 17.9 c 704
2003-12-19 02:45:58 C 22 27 16.04 -10 10 42.6 18.0 c 704
2003-12-19 02:47:29 C 22 27 16.03 -10 10 39.6 18.3 c 704
2003-12-19 03:28:07 C 22 27 17.39 -10 09 02.2 c 926
2003-12-19 03:29:49 C 22 27 17.47 -10 08 58.6 c 926
2003-12-20 16:48:58 C 22 28 32.28 -08 40 10.2 d 104
2003-12-20 16:51:59 C 22 28 32.37 -08 40 03.0 d 104
2003-12-20 16:55:05 C 22 28 32.45 -08 39 56.0 d 104
2003-12-20 17:01:28 C 22 28 32.66 -08 39 40.7 d 104
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)