IAA RAS IAA Minor Planet Database

2021 RU9

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4468354138 ± 3.23e-08
Semi-major axis (a)1.7455548123 AU ± 1.34e-08
Inclination (i)22.27784763° ± 1.59e-05
Long. of Asc. Node (Ω)317.73314929° ± 1.98e-05
Arg. of Perihelion (ω)59.84138367° ± 3.05e-05
Mean Anomaly (M)279.47003274° ± 6.38e-06
Mean Motion (n)0.4273778797°/day ± 4.94e-09
Perihelion dist (q)0.96557911 AU ± 5.69e-08
Aphelion dist (Q)2.52553052 AU ± 5.97e-08
Orbital Period2.30621736 yr ± 2.66e-08
Physical Parameters
H (abs. magnitude)20.54
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.261″
Uncertainty0
Orbit TypeApollo
MOID0.097944 AU
Observations Used51
Oppositions9
Arc Total2006-2022
First Observation Used2006-01-31
Last Observation Used2022-01-07
Observations (52)
Date Type RA Dec Mag Band Observatory
2006-01-31 08:56:14 C 09 44 48.69 +14 38 21.1 – n 645
2006-01-31 08:57:26 C 09 44 48.55 +14 38 20.7 – n 645
2006-01-31 08:59:49 C 09 44 48.32 +14 38 20.1 – n 645
2006-01-31 09:01:00 C 09 44 48.22 +14 38 19.8 – n 645
2013-02-08 11:58:12 C 10 22 41.520 +01 06 18.45 – V F51
2013-02-08 12:21:03 C 10 22 39.615 +01 06 16.29 – V F51
2013-02-08 12:43:55 C 10 22 37.690 +01 06 13.15 – V F51
2013-02-21 09:53:36 C 09 57 31.306 +00 45 07.25 – V F51
2021-09-10 03:16:20 C 17 20 40.41 +01 11 00.0 – V G96
2021-09-10 03:31:09 C 17 20 40.38 +01 11 50.1 – V G96
2021-09-10 03:38:33 C 17 20 40.38 +01 12 15.1 – V G96
2021-09-10 04:55:45 C 17 20 40.27 +01 16 37.6 – V 703
2021-09-10 05:02:36 C 17 20 40.27 +01 16 59.5 – V 703
2021-09-10 18:52:36 C 17 20 45.66 +02 03 46.8 – X L01
2021-09-10 18:57:10 C 17 20 45.68 +02 04 02.7 – X L01
2021-09-10 19:01:45 C 17 20 45.70 +02 04 18.4 – X L01
2021-09-10 19:13:08 C 17 20 45.68 +02 04 56.1 – X L01
2021-09-10 19:33:49 C 17 20 45.82 +02 06 03.9 – V 033
2021-09-10 19:34:44 C 17 20 45.82 +02 06 07.2 – V 033
2021-09-10 19:35:39 C 17 20 45.83 +02 06 10.2 – V 033
2021-09-11 01:22:16 C 17 20 48.11 +02 25 44.4 – u H21
2021-09-11 01:32:51 C 17 20 48.10 +02 26 20.3 – u H21
2021-09-11 01:40:58 C 17 20 48.08 +02 26 47.4 – u H21
2021-09-11 19:07:08 C 17 20 55.05 +03 25 15.3 – V 033
2021-09-11 19:08:17 C 17 20 55.04 +03 25 19.0 – V 033
2021-09-11 19:09:27 C 17 20 55.05 +03 25 23.0 – V 033
2021-09-11 19:34:14 C 17 20 55.04 +03 26 47.2 – V L06
2021-09-11 19:34:50 C 17 20 55.04 +03 26 49.7 – V L06
2021-09-12 01:35:09 C 17 20 57.72 +03 46 56.6 – u H21
2021-09-12 01:43:15 C 17 20 57.75 +03 47 23.5 – u H21
2021-09-12 01:51:20 C 17 20 57.76 +03 47 50.5 – u H21
2021-09-14 02:30:49 C 17 21 21.98 +06 28 35.1 – V G96
2021-09-14 02:37:45 C 17 21 21.99 +06 28 57.9 – V G96
2021-09-14 02:44:39 C 17 21 21.99 +06 29 20.7 – V G96
2021-09-14 02:51:33 C 17 21 22.03 +06 29 43.0 – V G96
2021-09-29 03:42:46 C 17 25 26.84 +24 26 20.3 – V V06
2021-09-29 03:44:41 C 17 25 26.84 +24 26 25.5 – V V06
2021-09-29 03:46:37 C 17 25 26.84 +24 26 30.6 – V V06
2021-10-17 02:42:32 C 17 27 31.65 +41 27 18.9 – o 291
2021-10-17 02:52:16 C 17 27 31.59 +41 27 38.3 – o 291
2021-10-24 01:57:42 C 17 26 26.14 +46 58 59.9 – V G96
2021-10-24 02:05:25 C 17 26 26.07 +46 59 13.8 – V G96
2021-10-24 02:13:08 C 17 26 25.93 +46 59 27.8 – V G96
2021-10-24 02:43:03 C 17 26 25.50 +47 00 22.7 – V 291
2021-10-24 02:49:41 C 17 26 25.36 +47 00 35.3 – V 291
2021-10-24 02:56:19 C 17 26 25.28 +47 00 46.9 – V 291
2021-11-09 04:40:10 C 17 20 16.431 +58 16 18.12 – V T12
2022-01-03 02:56:31 C 05 35 52.77 +72 47 19.3 – X 858
2022-01-03 03:08:12 C 05 35 52.48 +72 46 45.9 – X 858
2022-01-03 03:21:16 C 05 35 52.23 +72 46 08.9 – X 858