274855 (2009 RB4)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3008662473 ± 1.82e-08
Semi-major axis (a)1.6386494564 AU ± 6.52e-09
Inclination (i)9.53587656° ± 3.12e-06
Long. of Asc. Node (Ω)182.10122304° ± 1.07e-05
Arg. of Perihelion (ω)75.21475080° ± 1.37e-05
Mean Anomaly (M)329.91872670° ± 1.65e-05
Mean Motion (n)0.4698759197°/day ± 2.80e-09
Perihelion dist (q)1.14563514 AU ± 3.01e-08
Aphelion dist (Q)2.13166377 AU ± 3.10e-08
Orbital Period2.09763097 yr ± 1.25e-08
Physical Parameters
H (abs. magnitude)18.54
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.348″
Uncertainty0
Orbit TypeAmor
MOID0.210275 AU
Observations Used505
Oppositions18
Arc Total1990-2024
First Observation Used1990-07-27
Last Observation Used2024-12-23
Observations (530)
Date Type RA Dec Mag Band Observatory
2011-06-28 00:40:33 C 22 31 44.58 +19 49 36.9 c A24
2011-06-28 00:42:38 C 22 31 44.67 +19 49 38.5 c A24
2011-07-07 07:54:13 C 22 44 27.03 +20 24 33.5 19.2 c 704
2011-07-07 08:09:04 C 22 44 27.77 +20 24 34.8 19.2 c 704
2011-07-07 08:23:54 C 22 44 28.29 +20 24 34.6 18.9 c 704
2011-07-07 08:38:46 C 22 44 28.98 +20 24 36.1 19.2 c 704
2011-07-07 08:53:38 C 22 44 29.57 +20 24 36.9 19.1 c 704
2011-07-26 01:22:11 C 22 56 25.03 +18 53 36.8 c A24
2011-07-26 01:24:16 C 22 56 25.04 +18 53 36.4 c A24
2011-08-02 00:30:49 C 22 56 04.01 +17 16 34.9 c A24
2011-08-02 00:32:54 C 22 56 03.98 +17 16 33.5 c A24
2011-08-02 01:46:50 C 22 56 02.88 +17 15 42.6 c A24
2011-08-03 00:08:02 C 22 55 49.14 +16 59 52.9 u C01
2011-08-03 00:09:25 C 22 55 49.13 +16 59 52.1 u C01
2011-08-03 00:10:48 C 22 55 49.11 +16 59 51.0 u C01
2011-08-03 00:12:11 C 22 55 49.08 +16 59 49.9 u C01
2011-08-03 00:13:35 C 22 55 49.06 +16 59 49.1 u C01
2011-08-03 00:15:00 C 22 55 49.04 +16 59 48.0 u C01
2011-08-03 00:16:23 C 22 55 49.01 +16 59 47.1 u C01
2011-08-03 00:17:47 C 22 55 49.00 +16 59 46.0 u C01
2011-08-03 00:19:10 C 22 55 48.97 +16 59 45.0 u C01
2011-08-03 00:20:34 C 22 55 48.95 +16 59 44.1 u C01
2011-08-20 21:30:29 C 22 45 07.63 +10 04 47.0 u A13
2011-08-20 22:03:51 C 22 45 06.29 +10 04 10.2 u A13
2011-08-21 23:17:00 C 22 44 14.00 +09 34 38.6 c A24
2011-08-21 23:18:02 C 22 44 13.98 +09 34 37.2 c A24
2011-08-23 20:44:54 C 22 42 39.32 +08 40 36.5 u A78
2011-08-23 20:53:43 C 22 42 38.95 +08 40 25.5 u A78
2011-08-23 21:01:16 C 22 42 38.69 +08 40 16.6 u A78
2011-08-24 08:37:56 C 22 42 14.285 +08 26 28.29 L F51
2011-08-24 08:54:29 C 22 42 13.622 +08 26 08.47 L F51
2011-08-24 09:09:18 C 22 42 13.022 +08 25 50.74 L F51
2011-08-24 21:30:27 C 22 41 47.01 +08 10 52.4 u A13
2011-08-24 22:05:09 C 22 41 45.65 +08 10 10.5 u A13
2011-09-01 08:06:39 C 22 35 36.792 +04 33 19.58 L F51
2011-09-01 08:24:19 C 22 35 36.125 +04 32 58.29 L F51
2011-09-01 08:43:39 C 22 35 35.394 +04 32 34.90 L F51
2011-09-01 09:00:31 C 22 35 34.754 +04 32 14.49 L F51
2011-09-01 19:31:23 C 22 35 14.23 +04 19 21.6 u A50
2011-09-01 19:59:34 C 22 35 13.22 +04 18 47.4 u A50
2011-09-01 20:27:47 C 22 35 12.21 +04 18 13.1 u A50
2011-09-06 06:13:50 C 22 31 57.72 +02 12 35.1 u H45
2011-09-06 06:15:59 C 22 31 57.65 +02 12 32.6 u H45
2011-09-06 06:19:01 C 22 31 57.54 +02 12 29.2 u H45
2011-09-06 06:20:59 C 22 31 57.49 +02 12 26.5 u H45
2011-09-06 06:22:37 C 22 31 57.42 +02 12 25.5 u H45
2011-09-06 07:58:02 C 22 31 55.507 +02 10 37.98 L F51
2011-09-06 08:16:27 C 22 31 54.898 +02 10 16.61 L F51
2011-09-13 20:38:15 C 22 27 37.34 -01 07 52.7 u 160
2011-09-13 20:39:33 C 22 27 37.29 -01 07 54.1 u 160