164221 (2004 QE20)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2054392173 ± 6.47e-08
Semi-major axis (a)1.5051678160 AU ± 3.90e-09
Inclination (i)6.48255670° ± 3.66e-06
Long. of Asc. Node (Ω)272.56314203° ± 4.34e-05
Arg. of Perihelion (ω)74.31831557° ± 4.80e-05
Mean Anomaly (M)175.80276294° ± 2.56e-05
Mean Motion (n)0.5337463165°/day ± 2.07e-09
Perihelion dist (q)1.19594732 AU ± 9.75e-08
Aphelion dist (Q)1.81438831 AU ± 9.75e-08
Orbital Period1.84661936 yr ± 7.17e-09
Physical Parameters
H (abs. magnitude)20.43
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.426″
Uncertainty0
Orbit TypeAmor
MOID0.218307 AU
Observations Used191
Oppositions9
Arc Total2002-2022
First Observation Used2002-06-05
Last Observation Used2022-03-03
Observations (199)
Date Type RA Dec Mag Band Observatory
2004-10-30 04:46:31 C 00 23 13.07 +28 59 42.1 d G72
2004-10-30 04:54:10 C 00 23 13.14 +28 59 36.7 d G72
2004-10-30 04:57:59 C 00 23 13.30 +28 59 34.3 d G72
2004-10-30 05:01:48 C 00 23 13.40 +28 59 30.2 d G72
2004-10-30 05:05:38 C 00 23 13.56 +28 59 26.6 d G72
2004-10-30 22:00:14 C 00 23 53.09 +28 43 44.6 c 952
2004-10-30 22:02:16 C 00 23 53.17 +28 43 42.7 c 952
2004-10-30 22:04:18 C 00 23 53.20 +28 43 40.9 c 952
2004-12-10 04:48:16 C 01 24 25.01 +18 32 06.4 d 291
2004-12-10 04:54:15 C 01 24 25.47 +18 32 05.0 d 291
2004-12-10 05:00:28 C 01 24 25.94 +18 32 03.6 d 291
2006-11-19 08:26:17 C 08 00 54.86 +23 13 01.5 o 696
2006-11-19 09:02:20 C 08 00 55.07 +23 12 51.9 o 696
2006-12-11 11:16:22 C 07 50 03.56 +20 54 27.7 c 691
2006-12-11 11:41:21 C 07 50 02.29 +20 54 21.2 c 691
2006-12-11 12:06:20 C 07 50 01.00 +20 54 15.5 c 691
2006-12-15 10:31:48 C 07 44 50.56 +20 33 08.1 c 691
2006-12-15 10:56:46 C 07 44 48.89 +20 33 03.0 c 691
2006-12-15 11:21:43 C 07 44 47.35 +20 32 57.1 c 691
2006-12-24 05:39:17 C 07 30 29.33 +19 48 38.3 21.2 o H55
2006-12-24 05:44:38 C 07 30 29.10 +19 48 37.3 21.2 o H55
2006-12-24 05:49:56 C 07 30 28.59 +19 48 35.9 20.9 o H55
2006-12-24 05:55:17 C 07 30 28.10 +19 48 36.4 21.1 o H55
2006-12-27 07:25:13 C 07 24 49.94 +19 33 50.4 o 691
2006-12-27 07:50:12 C 07 24 47.92 +19 33 45.7 o 691
2006-12-27 08:15:10 C 07 24 45.92 +19 33 40.8 o 691
2007-01-10 03:35:11 C 06 58 46.78 +18 31 32.4 20.6 o H55
2007-01-10 03:55:53 C 06 58 45.02 +18 31 30.0 20.5 o H55
2007-01-10 04:27:21 C 06 58 42.50 +18 31 23.8 20.5 o H55
2009-01-24 09:14:43 C 10 00 25.27 +01 56 06.5 t 568
2009-01-24 09:20:27 C 10 00 24.94 +01 56 06.2 t 568
2009-01-24 09:32:27 C 10 00 24.24 +01 56 06.7 t 568
2009-01-24 09:38:07 C 10 00 23.91 +01 56 06.4 t 568
2009-01-24 09:43:51 C 10 00 23.57 +01 56 06.4 t 568
2009-01-24 09:49:37 C 10 00 23.24 +01 56 06.5 t 568
2009-01-24 09:55:15 C 10 00 22.93 +01 56 06.7 t 568
2009-01-24 10:21:34 C 10 00 21.37 +01 56 06.5 t 568
2009-01-24 10:28:18 C 10 00 20.97 +01 56 06.7 t 568
2009-01-24 10:34:58 C 10 00 20.59 +01 56 06.8 t 568
2009-01-24 10:42:54 C 10 00 20.13 +01 56 06.9 t 568
2009-01-24 10:51:38 C 10 00 19.59 +01 56 06.8 t 568
2009-01-25 11:25:41 C 09 58 55.91 +01 56 21.3 t 568
2009-01-25 12:00:12 C 09 58 53.78 +01 56 20.7 c 568
2009-01-25 12:34:18 C 09 58 51.80 +01 56 21.0 c 568
2009-01-25 13:01:34 C 09 58 50.07 +01 56 22.4 c 568
2009-01-25 15:32:36 C 09 58 41.06 +01 56 25.4 t 568
2009-01-25 15:53:22 C 09 58 39.78 +01 56 25.8 t 568
2009-01-26 08:37:49 C 09 57 42.34 +01 56 49.2 t 568
2009-01-26 09:06:52 C 09 57 40.56 +01 56 50.0 t 568
2009-01-26 09:45:42 C 09 57 38.18 +01 56 51.0 t 568