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
2009-01-26 10:06:08 C 09 57 36.93 +01 56 51.7 t 568
2009-01-26 11:15:59 C 09 57 32.55 +01 56 53.5 t 568
2015-08-11 06:41:20 C 17 30 23.199 -11 17 15.38 L F51
2015-08-11 06:56:26 C 17 30 23.668 -11 17 09.13 L F51
2015-08-11 07:11:14 C 17 30 24.137 -11 17 03.19 L F51
2015-08-11 07:26:27 C 17 30 24.625 -11 16 56.62 L F51
2017-11-16 02:42:37 C 05 30 59.54 +33 46 04.8 u 069
2017-11-16 03:02:32 C 05 30 58.37 +33 45 56.0 u 069
2017-11-16 03:36:36 C 05 30 56.46 +33 45 42.3 u 069
2017-12-15 05:11:11 C 04 42 23.11 +26 41 43.6 U G96
2017-12-15 05:18:45 C 04 42 22.61 +26 41 37.6 U G96
2017-12-15 05:26:19 C 04 42 22.15 +26 41 33.8 U G96
2017-12-15 05:33:54 C 04 42 21.66 +26 41 28.1 U G96
2017-12-25 07:11:16 C 04 31 31.29 +24 14 46.0 U 703
2017-12-25 07:19:34 C 04 31 30.88 +24 14 43.2 U 703
2017-12-25 07:27:50 C 04 31 30.60 +24 14 38.0 U 703
2017-12-25 07:36:00 C 04 31 30.29 +24 14 34.1 U 703
2017-12-26 04:08:54 C 04 30 53.05 +24 03 25.9 U G96
2017-12-26 04:16:15 C 04 30 52.81 +24 03 22.1 U G96
2017-12-26 04:23:38 C 04 30 52.56 +24 03 18.1 U G96
2017-12-26 04:30:59 C 04 30 52.33 +24 03 13.9 U G96
2018-01-10 09:03:52 C 04 26 50.953 +21 27 44.84 U F51
2018-01-10 09:22:07 C 04 26 51.006 +21 27 38.76 U F51
2018-01-10 09:40:21 C 04 26 51.052 +21 27 32.79 U F51
2018-01-10 09:58:27 C 04 26 51.122 +21 27 26.71 U F51
2020-01-01 13:36:02 C 09 02 58.650 +11 04 23.89 U F51
2020-01-01 13:55:38 C 09 02 57.622 +11 04 21.29 U F51
2020-01-01 14:15:08 C 09 02 56.594 +11 04 18.58 U F51
2020-01-01 14:34:42 C 09 02 55.570 +11 04 16.15 U F51
2020-01-21 09:10:51 C 08 31 54.418 +10 43 16.86 U F52
2020-01-21 09:27:51 C 08 31 53.120 +10 43 17.20 U F52
2020-01-21 09:45:44 C 08 31 51.712 +10 43 17.92 U F52
2020-01-21 10:03:18 C 08 31 50.336 +10 43 18.84 U F52
2020-01-22 11:58:15 C 08 29 53.837 +10 44 13.71 U F52
2020-01-22 12:15:26 C 08 29 52.500 +10 44 14.47 U F52
2020-01-22 12:32:27 C 08 29 51.175 +10 44 15.03 U F52
2020-01-22 12:49:27 C 08 29 49.850 +10 44 15.55 U F52
2020-01-24 08:03:18 C 08 26 37.140 +10 46 10.45 U F51
2020-01-24 08:17:45 C 08 26 36.020 +10 46 11.01 U F51
2020-01-24 08:32:10 C 08 26 34.903 +10 46 12.01 U F51
2020-01-26 07:53:04 C 08 23 03.75 +10 48 46.2 V G96
2020-01-26 08:00:29 C 08 23 03.21 +10 48 46.3 V G96
2020-01-26 08:07:55 C 08 23 02.63 +10 48 46.7 V G96
2020-01-26 08:15:21 C 08 23 02.03 +10 48 47.4 V G96
2020-02-23 02:48:36 C 07 46 50.60 +11 51 43.5 u H21
2020-02-23 03:32:00 C 07 46 49.30 +11 51 47.6 u H21
2022-03-03 09:26:07 C 10 19 28.684 -03 41 10.54 U F52
2022-03-03 09:43:49 C 10 19 27.473 -03 41 04.48 U F52
2022-03-03 10:01:32 C 10 19 26.304 -03 40 58.42 U F52