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
2003-12-20 17:08:28 C 22 28 32.88 -08 39 24.0 d 104
2003-12-21 01:06:57 C 22 28 48.69 -08 20 31.3 r 715
2003-12-21 01:10:11 C 22 28 48.79 -08 20 23.7 r 715
2003-12-21 01:24:09 C 22 28 49.22 -08 19 50.5 r 715
2003-12-21 01:27:22 C 22 28 49.32 -08 19 42.6 r 715
2003-12-21 01:30:46 C 22 28 49.42 -08 19 35.0 r 715
2003-12-23 01:32:26 C 22 30 24.49 -06 26 49.1 17.9 c 704
2003-12-23 01:50:51 C 22 30 25.06 -06 26 05.7 18.2 c 704
2003-12-23 02:29:38 C 22 30 26.21 -06 24 34.2 18.0 c 704
2003-12-23 02:48:06 C 22 30 26.82 -06 23 52.2 18.2 c 704
2003-12-23 16:41:21 C 22 30 54.43 -05 51 34.3 c 046
2003-12-23 16:43:41 C 22 30 54.44 -05 51 28.3 c 046
2003-12-23 16:45:56 C 22 30 54.63 -05 51 26.0 c 046
2003-12-23 16:47:01 C 22 30 54.48 -05 51 21.9 c 046
2003-12-23 16:49:15 C 22 30 54.71 -05 51 15.3 c 046
2003-12-23 18:43:05 C 22 30 58.21 -05 46 51.1 r 938
2003-12-24 00:41:47 C 22 31 09.99 -05 32 57.9 r 446
2003-12-24 00:45:31 C 22 31 10.10 -05 32 48.6 r 446
2003-12-24 00:49:14 C 22 31 10.20 -05 32 40.4 r 446
2003-12-24 10:47:27 C 22 31 29.477 -05 09 24.55 r 413
2003-12-24 10:56:47 C 22 31 29.773 -05 09 02.87 r 413
2003-12-24 11:06:06 C 22 31 30.070 -05 08 41.22 r 413
2003-12-24 18:21:48 C 22 31 44.47 -04 52 07.8 c 246
2003-12-24 18:22:31 C 22 31 44.53 -04 52 06.0 c 246
2003-12-24 18:23:29 C 22 31 44.54 -04 52 04.0 c 246
2003-12-24 18:24:36 C 22 31 44.59 -04 52 01.2 c 246
2003-12-24 18:25:37 C 22 31 44.61 -04 51 59.3 c 246
2003-12-24 18:26:30 C 22 31 44.66 -04 51 56.9 c 246
2003-12-25 10:33:19 C 22 32 15.78 -04 14 38.9 r 422
2003-12-25 10:34:08 C 22 32 15.80 -04 14 36.9 r 422
2003-12-25 10:35:22 C 22 32 15.860 -04 14 34.12 r 413
2003-12-25 10:37:42 C 22 32 15.935 -04 14 28.87 r 413
2003-12-25 10:40:01 C 22 32 16.011 -04 14 23.57 r 413
2003-12-25 10:42:22 C 22 32 16.073 -04 14 18.01 r 413
2003-12-25 10:44:41 C 22 32 16.157 -04 14 12.70 r 413
2003-12-25 10:47:01 C 22 32 16.226 -04 14 07.47 r 413
2003-12-26 18:37:48 C 22 33 17.98 -03 01 31.3 c 587
2003-12-26 18:40:26 C 22 33 17.98 -03 01 24.2 c 587
2003-12-26 18:43:01 C 22 33 18.03 -03 01 19.4 c 587
2003-12-26 18:45:37 C 22 33 18.11 -03 01 11.5 c 587
2003-12-28 01:34:42 C 22 34 17.23 -01 51 19.3 17.8 c 704
2003-12-28 01:53:44 C 22 34 17.78 -01 50 36.6 18.2 c 704
2003-12-28 02:13:06 C 22 34 18.39 -01 49 54.3 18.1 c 704
2003-12-28 02:32:24 C 22 34 18.94 -01 49 09.4 18.4 c 704
2003-12-28 02:52:09 C 22 34 19.50 -01 48 25.7 18.3 c 704
2003-12-28 17:52:09 C 22 34 48.24 -01 14 40.7 r J95
2003-12-28 18:05:04 C 22 34 48.60 -01 14 12.2 r J95
2003-12-28 18:16:44 C 22 34 48.92 -01 13 45.4 r J95
2003-12-29 01:09:20 C 22 35 01.89 -00 58 16.5 o 715
2003-12-29 01:14:42 C 22 35 02.05 -00 58 04.2 o 715
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)