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
2011-09-13 20:40:24 C 22 27 37.27 -01 07 55.0 u 160
2011-09-14 22:02:42 C 22 27 09.46 -01 33 37.7 r 203
2011-09-14 22:44:20 C 22 27 08.57 -01 34 19.4 r 203
2011-09-15 20:48:08 C 22 26 46.96 -01 56 09.8 u 160
2011-09-15 20:51:25 C 22 26 46.87 -01 56 12.7 u 160
2011-09-15 20:54:42 C 22 26 46.80 -01 56 16.5 u 160
2011-09-18 04:39:38 C 22 25 59.34 -02 49 21.8 r 703
2011-09-18 04:49:34 C 22 25 59.19 -02 49 29.9 r 703
2011-09-18 04:59:32 C 22 25 59.05 -02 49 39.8 r 703
2011-09-20 07:51:34 C 22 25 25.803 -03 35 20.46 L F51
2011-09-20 08:13:18 C 22 25 25.505 -03 35 39.46 L F51
2011-09-20 08:35:06 C 22 25 25.209 -03 35 58.46 L F51
2011-09-20 08:57:04 C 22 25 24.905 -03 36 17.67 L F51
2011-09-21 06:01:23 C 22 25 14.05 -03 54 29.5 18.5 c 704
2011-09-21 06:23:47 C 22 25 13.78 -03 54 48.3 18.7 c 704
2011-09-21 07:02:26 C 22 25 13.31 -03 55 21.1 18.4 c 704
2011-09-21 07:21:46 C 22 25 13.10 -03 55 37.4 19.1 c 704
2011-09-21 20:01:32 C 22 25 08.29 -04 06 21.2 u A13
2011-09-21 20:32:16 C 22 25 07.96 -04 06 45.7 u A13
2011-09-23 03:27:20 C 22 24 57.29 -04 32 01.5 o 691
2011-09-23 03:42:35 C 22 24 57.17 -04 32 13.7 o 691
2011-09-23 03:57:50 C 22 24 57.03 -04 32 25.9 o 691
2011-09-23 20:46:10 C 22 24 52.39 -04 45 49.3 r 106
2011-09-23 21:05:13 C 22 24 52.28 -04 46 03.0 r 106
2011-09-23 21:24:15 C 22 24 52.09 -04 46 18.3 r 106
2011-09-23 21:43:17 C 22 24 52.01 -04 46 33.2 r 106
2011-09-27 04:10:22 C 22 24 46.98 -05 44 41.7 18.7 c 704
2011-09-27 04:28:52 C 22 24 46.88 -05 44 53.5 18.8 c 704
2011-09-27 04:47:26 C 22 24 46.85 -05 45 06.8 18.9 c 704
2011-09-27 05:06:09 C 22 24 46.82 -05 45 20.5 19.0 c 704
2011-09-27 05:24:38 C 22 24 46.76 -05 45 32.7 19.1 c 704
2011-10-02 04:05:45 C 22 25 25.34 -07 01 02.7 19.7 c 704
2011-10-02 04:43:30 C 22 25 25.60 -07 01 24.3 19.1 c 704
2011-10-02 05:02:30 C 22 25 25.74 -07 01 35.3 18.7 c 704
2011-10-18 02:52:51 C 22 33 11.23 -09 32 08.0 r G96
2011-10-18 03:08:28 C 22 33 11.66 -09 32 11.6 r G96
2011-10-18 03:16:08 C 22 33 11.91 -09 32 13.6 r G96
2011-10-21 03:04:18 C 22 35 29.36 -09 46 55.6 r G96
2011-10-21 03:17:46 C 22 35 29.79 -09 46 57.9 r G96
2011-10-21 03:31:09 C 22 35 30.19 -09 47 00.2 r G96
2011-10-21 03:44:45 C 22 35 30.58 -09 47 02.9 r G96
2013-01-25 07:06:31 C 12 01 45.00 -09 45 24.6 u 807
2013-01-25 07:15:39 C 12 01 45.38 -09 45 26.5 u 807
2013-01-25 07:24:46 C 12 01 45.74 -09 45 28.3 u 807
2013-02-17 11:14:09 C 12 20 01.65 -10 10 50.6 q 448
2013-02-17 11:32:01 C 12 20 01.96 -10 10 47.1 q 448
2013-02-17 11:51:31 C 12 20 02.31 -10 10 44.0 q 448
2013-02-18 12:04:58 C 12 20 30.60 -10 06 25.6 o 926
2013-02-18 12:30:49 C 12 20 31.02 -10 06 20.9 o 926
2013-02-18 12:59:18 C 12 20 31.51 -10 06 14.8 o 926