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
2004-04-20 20:37:26 C 23 40 45.38 +74 56 11.7 c 639
2004-04-20 20:41:20 C 23 40 49.07 +74 56 30.8 c 639
2004-04-20 20:45:16 C 23 40 52.56 +74 56 47.7 c 639
2004-04-20 20:48:28 C 23 40 55.72 +74 57 03.4 c 639
2004-04-20 20:56:30 C 23 41 03.39 +74 57 40.6 c 639
2004-04-20 21:03:41 C 23 41 10.07 +74 58 14.6 c 639
2004-04-20 21:07:37 C 23 41 13.89 +74 58 32.8 c 639
2004-04-20 21:11:58 C 23 41 17.79 +74 58 53.2 c 639
2004-04-20 22:56:53 C 23 42 59.30 +75 07 12.2 c 056
2004-04-21 20:31:28 C 00 07 34.77 +76 51 32.4 c 118
2004-04-21 20:33:57 C 00 07 38.38 +76 51 44.7 c 118
2004-04-21 20:36:28 C 00 07 41.98 +76 51 57.1 c 118
2004-04-22 19:59:09 C 00 49 15.87 +78 46 25.8 o 084
2004-04-22 20:10:58 C 00 49 39.35 +78 47 13.5 d 118
2004-04-22 20:13:28 C 00 49 44.98 +78 47 24.8 d 118
2004-04-22 20:15:57 C 00 49 50.78 +78 47 36.5 d 118
2004-04-23 00:51:58 C 01 01 00.55 +79 09 14.4 o 084
2004-04-23 20:41:54 C 02 01 42.68 +80 25 39.0 o 084
2004-04-24 21:02:11 C 03 48 05.24 +80 46 00.2 o 084
2004-04-25 20:42:57 C 05 35 05.00 +78 48 24.3 o 084
2004-04-26 19:46:38 C 06 49 16.20 +74 35 17.3 o 084
2004-04-27 02:44:25 C 07 05 33.98 +72 55 40.8 15.0 d H67
2004-04-27 02:48:59 C 07 05 43.91 +72 54 30.1 15.0 d H67
2004-04-27 02:53:12 C 07 05 52.96 +72 53 25.9 15.0 d H67
2004-04-27 20:08:05 C 07 37 29.75 +68 03 42.0 c A30
2004-04-27 20:08:27 C 07 37 30.49 +68 03 35.5 c A30
2004-04-27 20:09:11 C 07 37 31.54 +68 03 21.6 c A30
2004-04-27 20:09:29 C 07 37 31.71 +68 03 16.6 c A30
2004-04-27 20:10:03 C 07 37 32.55 +68 03 05.7 c A30
2004-04-27 20:11:13 C 07 37 34.15 +68 02 46.2 c A30
2004-04-27 20:11:49 C 07 37 35.08 +68 02 33.5 c A30
2004-04-27 20:14:21 C 07 37 38.96 +68 01 45.4 c A30
2004-04-27 20:14:35 C 07 37 39.19 +68 01 41.6 c A30
2004-04-27 20:14:51 C 07 37 39.93 +68 01 36.9 c A30
2004-04-27 20:15:05 C 07 37 39.85 +68 01 33.2 c A30
2004-04-27 20:15:19 C 07 37 39.97 +68 01 27.8 c A30
2004-04-27 20:15:33 C 07 37 41.17 +68 01 24.4 c A30
2004-04-27 20:16:03 C 07 37 41.81 +68 01 15.0 c A30
2004-04-27 20:17:31 C 07 37 44.23 +68 00 48.0 c A30
2004-04-27 20:17:43 C 07 37 44.47 +68 00 43.5 c A30
2004-04-27 20:17:56 C 07 37 44.86 +68 00 40.2 c A30
2004-04-27 20:18:21 C 07 37 44.93 +68 00 32.4 c A30
2004-04-27 20:21:44 C 07 37 50.20 +67 59 29.6 c A30
2004-04-27 20:22:09 C 07 37 50.65 +67 59 23.3 c A30
2004-04-27 20:22:20 C 07 37 50.70 +67 59 18.7 c A30
2004-04-27 20:22:33 C 07 37 50.81 +67 59 13.6 c A30
2004-04-27 20:22:45 C 07 37 51.67 +67 59 09.9 c A30
2004-04-27 20:23:22 C 07 37 51.76 +67 58 58.1 c A30
2004-04-27 20:24:57 C 07 37 54.18 +67 58 27.6 c A30
2004-04-27 20:25:22 C 07 37 54.95 +67 58 19.6 c A30
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)