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
2025-05-02 21:30:10 C 07 26 09.36 +55 36 53.5 V M32
2025-05-02 21:33:08 C 07 26 10.73 +55 36 40.5 V M32
2025-05-02 21:36:07 C 07 26 12.26 +55 36 25.6 V M32
2025-05-02 21:37:37 C 07 26 12.97 +55 36 19.0 V M32
2025-05-02 21:37:55 C 07 26 13.11 +55 36 17.2 V M32
2025-05-02 21:40:26 B 07 26 14.621 +55 36 09.86 W Z80
2025-05-02 21:41:30 C 07 26 14.88 +55 36 00.9 V M32
2025-05-03 03:49:48 C 07 29 14.251 +55 07 31.37 V 703
2025-05-03 03:53:09 C 07 29 15.896 +55 07 15.35 V 703
2025-05-03 03:56:30 C 07 29 17.509 +55 06 59.33 V 703
2025-05-03 04:02:00 C 07 29 20.094 +55 06 33.30 V 703
2025-05-03 20:55:38 C 07 37 17.825 +53 44 53.95 V R17
2025-05-03 21:16:17 C 07 37 27.156 +53 43 10.20 V R17
2025-05-03 21:37:01 C 07 37 36.540 +53 41 26.41 V R17
2025-05-03 21:57:31 C 07 37 45.830 +53 39 42.98 V R17
2025-05-04 05:45:52 C 07 41 18.422 +53 00 43.88 V T05
2025-05-04 05:52:32 C 07 41 21.355 +53 00 09.90 V T05
2025-05-04 06:00:33 C 07 41 24.857 +52 59 29.11 V T05
2025-05-04 06:19:00 C 07 41 32.959 +52 57 54.40 V T05
2025-05-04 19:13:55 B 07 47 12.62 +51 51 10.4 X L76
2025-05-04 19:24:39 B 07 47 17.19 +51 50 13.5 X L76
2025-05-04 19:35:23 B 07 47 21.77 +51 49 17.4 X L76
2025-05-04 20:25:26 C 07 47 43.682 +51 44 59.10 Z C23
2025-05-04 21:04:01 C 07 48 00.007 +51 41 34.08 Z C23
2025-05-04 21:38:09 C 07 48 14.513 +51 38 33.68 Z C23
2025-05-05 21:59:32 C 07 58 15.511 +49 27 12.96 Z C23
2025-05-05 22:13:56 C 07 58 21.302 +49 25 52.90 Z C23
2025-05-05 22:37:24 C 07 58 30.559 +49 23 41.96 Z C23
2025-05-06 18:43:28 B 08 06 13.24 +47 30 34.6 X L76
2025-05-06 18:54:12 B 08 06 17.20 +47 29 32.7 X L76
2025-05-06 19:04:57 B 08 06 21.16 +47 28 30.6 X L76
2025-05-08 05:51:28 C 08 18 36.144 +44 03 55.62 V 703
2025-05-08 05:54:36 C 08 18 37.213 +44 03 37.22 V 703
2025-05-08 05:55:52 C 08 18 38.347 +44 03 43.60 V T05
2025-05-08 05:57:45 C 08 18 38.250 +44 03 17.46 V 703
2025-05-08 06:00:53 C 08 18 39.301 +44 02 58.42 V 703
2025-05-08 06:03:12 C 08 18 40.738 +44 02 59.21 V T05
2025-05-08 07:36:20 C 08 19 11.146 +43 53 32.78 V T05
2025-05-08 07:41:02 C 08 19 12.749 +43 53 03.66 V T05
2025-05-08 20:24:54 C 08 23 22.471 +42 35 31.24 Z C23
2025-05-08 21:08:43 C 08 23 36.326 +42 31 00.44 Z C23
2025-05-08 21:49:52 C 08 23 49.325 +42 26 47.83 Z C23
2025-05-09 05:14:51 C 08 26 08.934 +41 41 16.98 V 703
2025-05-09 05:18:04 C 08 26 09.978 +41 40 56.64 V 703
2025-05-09 05:21:18 C 08 26 10.950 +41 40 36.59 V 703
2025-05-09 05:24:32 C 08 26 11.929 +41 40 16.68 V 703
2025-05-09 20:32:04 C 08 30 48.840 +40 06 11.95 Z C23
2025-05-09 20:42:04 C 08 30 51.43 +40 05 07.1 16.7 V M32
2025-05-09 20:43:54 C 08 30 52.01 +40 04 55.9 16.6 V M32
2025-05-09 20:45:46 C 08 30 52.52 +40 04 44.1 16.7 V M32
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)