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
2025-05-09 20:47:37 C 08 30 53.05 +40 04 32.0 16.5 V M32
2025-05-09 20:49:44 C 08 30 53.71 +40 04 18.5 16.9 V M32
2025-05-09 20:51:36 C 08 30 54.27 +40 04 06.9 16.9 V M32
2025-05-09 21:20:26 C 08 31 02.986 +40 01 07.61 Z C23
2025-05-09 22:07:20 C 08 31 16.798 +39 56 12.01 Z C23
2025-05-10 04:38:05 C 08 33 11.138 +39 15 29.34 V 703
2025-05-10 04:41:23 C 08 33 12.056 +39 15 08.24 V 703
2025-05-10 04:44:41 C 08 33 13.072 +39 14 47.29 V 703
2025-05-10 04:47:59 C 08 33 14.008 +39 14 26.84 V 703
2025-05-10 07:05:19 C 08 33 53.743 +39 00 08.71 V T05
2025-05-10 07:09:21 C 08 33 54.881 +38 59 43.15 V T05
2025-05-10 07:17:22 C 08 33 57.163 +38 58 52.03 V T05
2025-05-10 07:32:43 C 08 34 01.490 +38 57 14.40 V T05
2025-05-10 16:06:23 B 08 36 28.087 +38 03 10.84 W M73
2025-05-10 16:33:04 B 08 36 35.383 +38 00 20.84 W M73
2025-05-10 22:01:41 C 08 38 06.641 +37 25 20.28 W M14
2025-05-10 22:21:37 C 08 38 12.125 +37 23 12.70 W M14
2025-05-11 04:38:35 C 08 39 55.030 +36 43 22.58 V 703
2025-05-11 04:41:52 C 08 39 55.919 +36 43 01.60 V 703
2025-05-11 04:45:08 C 08 39 56.790 +36 42 40.57 V 703
2025-05-11 04:48:25 C 08 39 57.683 +36 42 19.44 V 703
2025-05-11 20:30:51 B 08 44 07.414 +35 01 48.11 X K87
2025-05-11 20:34:20 B 08 44 08.306 +35 01 26.00 X K87
2025-05-11 20:37:48 B 08 44 09.202 +35 01 03.40 X K87
2025-05-11 21:05:21 C 08 44 16.09 +34 58 04.5 V M32
2025-05-11 21:07:32 C 08 44 16.66 +34 57 50.3 V M32
2025-05-11 21:09:51 C 08 44 17.25 +34 57 35.0 V M32
2025-05-11 21:12:04 C 08 44 17.80 +34 57 20.9 V M32
2025-05-11 21:14:16 C 08 44 18.38 +34 57 05.9 V M32
2025-05-12 06:47:29 C 08 46 44.338 +33 56 05.42 V T08
2025-05-12 06:52:53 C 08 46 45.629 +33 55 30.43 V T08
2025-05-12 07:00:19 C 08 46 47.455 +33 54 42.52 V T08
2025-05-12 07:15:07 C 08 46 51.072 +33 53 06.76 V T08
2025-05-12 20:21:21 C 08 50 05.00 +32 28 38.6 V M32
2025-05-12 20:23:28 C 08 50 05.51 +32 28 24.9 V M32
2025-05-12 20:25:35 C 08 50 06.01 +32 28 11.4 V M32
2025-05-12 20:27:41 C 08 50 06.818 +32 27 58.90 Z C23
2025-05-12 20:27:42 C 08 50 06.52 +32 27 57.7 V M32
2025-05-12 20:29:49 C 08 50 07.03 +32 27 44.0 V M32
2025-05-12 20:32:17 C 08 50 07.910 +32 27 29.38 Z C23
2025-05-12 21:35:15 C 08 50 22.920 +32 20 42.86 Z C23
2025-05-12 22:11:13 C 08 50 31.519 +32 16 49.69 Z C23
2025-05-12 22:14:07 C 08 50 32.172 +32 16 31.33 Z C23
2025-05-13 06:46:19 C 08 52 33.869 +31 21 54.29 V T08
2025-05-13 06:54:27 C 08 52 35.736 +31 21 01.55 V T08
2025-05-13 06:59:14 C 08 52 36.835 +31 20 30.59 V T08
2025-05-13 07:13:41 C 08 52 40.133 +31 18 57.35 V T08
2025-05-13 19:40:52 C 08 55 32.83 +29 58 44.3 Z L04
2025-05-13 19:44:24 C 08 55 33.62 +29 58 21.4 Z L04
2025-05-13 19:47:58 C 08 55 34.42 +29 57 58.6 Z L04
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)