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
2004-07-08 09:17:49 C 10 44 01.05 -51 09 46.6 r E14
2004-07-08 09:28:19 C 10 44 01.77 -51 09 51.6 r E14
2004-07-08 09:33:35 C 10 44 02.21 -51 09 53.7 r E14
2004-08-29 08:15:19 C 12 56 16.12 -62 35 11.0 c 474
2004-08-29 08:17:58 C 12 56 16.28 -62 35 10.8 c 474
2004-08-29 08:19:19 C 12 56 16.61 -62 35 11.1 c 474
2004-10-02 11:39:51 C 15 52 10.04 -67 42 56.8 c 474
2004-10-02 11:41:21 C 15 52 10.66 -67 42 56.8 c 474
2004-10-02 11:42:40 C 15 52 10.93 -67 42 56.9 c 474
2004-10-02 11:44:58 C 15 52 11.46 -67 42 56.8 c 474
2004-10-02 11:46:19 C 15 52 11.85 -67 42 56.9 c 474
2004-11-06 10:16:00 C 19 26 44.81 -60 46 25.6 c 474
2004-11-06 10:18:20 C 19 26 45.32 -60 46 23.4 c 474
2004-11-06 10:20:20 C 19 26 45.73 -60 46 21.6 c 474
2004-11-06 10:23:50 C 19 26 46.46 -60 46 17.3 c 474
2005-08-02 08:40:43 C 11 59 50.20 -16 17 21.4 r E12
2005-08-02 08:49:34 C 11 59 51.07 -16 17 35.4 r E12
2005-08-02 08:58:20 C 11 59 51.93 -16 17 50.5 r E12
2005-08-02 09:07:10 C 11 59 52.80 -16 18 04.7 r E12
2009-08-12 18:23:57 C 04 31 50.55 -26 55 42.3 r E12
2009-08-12 18:38:24 C 04 31 51.56 -26 55 38.6 r E12
2009-08-12 18:52:54 C 04 31 52.50 -26 55 35.7 r E12
2009-08-12 19:07:26 C 04 31 53.54 -26 55 30.9 r E12
2009-09-18 01:25:48 C 05 28 11.90 -22 03 25.7 17.5 o C20
2009-09-18 01:33:42 C 05 28 12.38 -22 03 21.6 17.5 o C20
2009-09-19 00:57:28 C 05 29 44.21 -21 49 57.7 17.5 o C20
2009-09-19 01:05:23 C 05 29 44.73 -21 49 53.2 17.2 o C20
2009-10-05 23:40:55 C 06 01 13.93 -14 59 26.1 17.0 o C20
2009-10-05 23:49:10 C 06 01 14.71 -14 59 12.1 17.0 o C20
2009-10-09 10:05:22 C 06 10 16.96 -12 14 54.1 16.2 c 704
2009-10-09 10:24:19 C 06 10 19.14 -12 14 11.1 16.3 c 704
2009-10-09 10:43:27 C 06 10 21.32 -12 13 26.4 16.6 c 704
2009-10-09 11:02:30 C 06 10 23.48 -12 12 42.6 16.5 c 704
2009-10-09 11:21:59 C 06 10 25.71 -12 11 57.5 16.3 c 704
2009-10-12 23:09:00 C 06 21 52.10 -08 21 38.2 16.0 o C20
2009-10-12 23:11:07 C 06 21 52.42 -08 21 31.3 16.0 o C20
2009-10-14 02:03:46 C 06 26 11.44 -06 48 57.4 15.8 o C20
2009-10-16 01:57:18 C 06 35 01.51 -03 33 45.4 15.6 o C20
2009-10-17 02:10:14 C 06 40 09.53 -01 37 11.7 15.3 o C20
2009-10-17 02:13:07 C 06 40 10.15 -01 36 57.1 15.3 o C20
2009-10-21 11:29:45 C 07 10 34.99 +10 06 49.9 r 683
2009-10-21 11:49:20 C 07 10 42.05 +10 09 37.2 r 683
2009-10-27 22:10:40 C 08 49 18.97 +39 37 53.9 14.9 o C20
2009-10-27 22:13:55 C 08 49 22.32 +39 38 35.8 14.8 o C20
2009-10-28 21:05:58 C 09 14 54.52 +44 20 28.3 o C20
2009-10-28 21:06:14 C 09 14 54.88 +44 20 31.8 o C20
2009-10-30 01:27:03 C 09 51 57.28 +49 31 03.7 14.8 o 084
2009-10-30 01:33:49 C 09 52 06.78 +49 32 11.4 14.8 o 084
2009-10-31 03:50:37 C 10 31 23.31 +53 21 39.9 o 084
2009-10-31 03:55:43 C 10 31 31.22 +53 22 18.3 o 084
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)