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
2009-11-03 16:30:30 C 12 45 24.33 +58 10 50.9 15.5 o 084
2009-11-03 16:33:06 C 12 45 28.17 +58 10 50.4 15.5 o 084
2009-11-04 02:09:36 C 12 58 59.02 +58 08 20.7 o C20
2009-11-04 02:10:31 C 12 59 00.25 +58 08 21.0 o C20
2009-11-05 17:33:32 C 13 46 32.13 +57 12 33.1 15.5 o 084
2009-11-05 17:39:54 C 13 46 38.98 +57 12 19.9 15.7 o 084
2009-11-24 16:20:50 C 16 24 02.75 +40 51 31.8 17.3 o C20
2009-11-24 16:21:06 C 16 24 02.78 +40 51 31.2 17.5 o C20
2010-01-06 02:50:35 C 17 05 34.01 +18 40 11.2 17.9 u C20
2010-01-06 02:52:43 C 17 05 34.10 +18 40 08.0 18.1 u C20
2010-01-09 02:40:42 C 17 08 21.31 +16 54 27.5 17.9 u C20
2010-01-09 02:42:49 C 17 08 21.40 +16 54 24.2 18.5 u C20
2010-02-02 02:26:15 C 17 38 47.10 +01 38 32.3 18.7 u C20
2010-02-02 02:28:22 C 17 38 47.23 +01 38 29.1 18.4 u C20
2010-02-08 01:29:48 C 17 48 48.43 -02 24 20.1 19.5 u C20
2010-02-08 01:31:56 C 17 48 48.57 -02 24 23.5 19.3 u C20
2010-02-11 01:33:13 C 17 54 14.82 -04 28 33.2 19.0 u C20
2010-02-20 01:45:38 C 18 12 11.51 -10 48 42.8 19.7 u C20
2010-02-24 01:55:24 C 18 20 59.42 -13 41 19.4 19.1 u C20
2010-02-24 01:57:34 C 18 20 59.59 -13 41 23.2 18.8 u C20
2010-02-26 01:53:02 C 18 25 34.73 -15 08 11.6 19.6 u C20
2010-02-26 01:55:14 C 18 25 34.91 -15 08 15.0 19.3 u C20
2010-05-18 19:50:08 S 00 45 47.784 -63 12 35.75 L C51
2010-05-18 23:00:39 S 00 46 41.107 -63 13 43.07 L C51
2010-05-19 05:21:52 S 00 48 27.737 -63 15 54.79 L C51
2010-05-19 08:32:23 S 00 49 20.96 -63 16 59.3 L C51
2010-05-19 11:42:54 S 00 50 14.21 -63 18 04.2 L C51
2010-05-19 14:53:25 S 00 51 07.27 -63 19 06.7 L C51
2010-05-19 18:03:56 S 00 52 00.29 -63 20 08.9 L C51
2010-05-19 21:14:27 S 00 52 53.496 -63 21 10.80 L C51
2010-05-20 00:24:58 S 00 53 46.35 -63 22 11.7 L C51
2010-05-20 05:10:50 S 00 55 05.77 -63 23 41.4 L C51
2010-05-20 06:46:00 S 00 55 32.16 -63 24 10.8 L C51
2010-05-20 06:46:11 S 00 55 32.19 -63 24 10.9 L C51
2010-05-20 08:21:21 S 00 55 58.65 -63 24 40.3 L C51
2010-05-20 11:31:53 S 00 56 51.49 -63 25 37.9 L C51
2010-05-20 14:42:23 S 00 57 44.21 -63 26 35.8 L C51
2010-05-20 16:17:44 S 00 58 10.63 -63 27 04.4 L C51
2010-05-20 17:52:54 S 00 58 37.07 -63 27 32.5 L C51
2010-05-20 21:03:25 S 00 59 29.56 -63 28 28.3 L C51
2010-05-20 21:03:37 S 00 59 29.61 -63 28 28.5 L C51
2010-05-20 22:38:47 S 00 59 56.02 -63 28 56.8 L C51
2010-05-21 00:14:08 S 01 00 22.24 -63 29 23.6 L C51
2010-05-21 04:59:49 S 01 01 41.22 -63 30 45.6 L C51
2010-05-21 06:35:10 S 01 02 07.37 -63 31 12.0 L C51
2010-05-21 08:10:20 S 01 02 33.53 -63 31 38.8 L C51
2010-05-21 09:45:41 S 01 02 59.84 -63 32 05.2 L C51
2010-05-21 11:20:51 S 01 03 25.94 -63 32 31.4 L C51
2010-05-21 11:21:02 S 01 03 25.95 -63 32 31.3 L C51
2010-05-21 12:56:12 S 01 03 52.30 -63 32 57.0 L C51
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)