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
1990-07-27 08:39:00 21 33 33.71 +20 08 45.8 o 261
1990-07-27 09:49:00 21 33 32.73 +20 07 35.1 o 261
1992-05-01 04:02:00 11 02 22.06 +18 02 16.1 o 261
1992-05-01 04:52:00 11 02 23.73 +18 02 44.7 o 261
2007-11-20 05:57:54 C 01 54 55.898 -00 14 55.78 645
2007-11-20 05:59:06 C 01 54 55.836 -00 14 55.76 645
2007-11-20 06:02:41 C 01 54 55.687 -00 14 56.46 645
2009-09-14 07:44:09 C 01 27 51.53 +08 16 39.5 19.4 c 704
2009-09-14 08:00:59 C 01 27 50.79 +08 16 27.6 19.6 c 704
2009-09-14 08:17:48 C 01 27 50.04 +08 16 15.7 19.7 c 704
2009-09-14 08:34:39 C 01 27 49.31 +08 16 04.2 19.9 c 704
2009-09-14 08:51:31 C 01 27 48.67 +08 15 51.2 20.3 c 704
2009-09-15 00:31:00 C 01 27 10.00 +08 04 27.0 r J95
2009-09-15 00:35:22 C 01 27 09.84 +08 04 23.6 r J95
2009-09-15 00:37:19 C 01 27 09.67 +08 04 22.8 r A17
2009-09-15 00:39:47 C 01 27 09.66 +08 04 20.5 r J95
2009-09-15 00:48:38 C 01 27 09.18 +08 04 14.6 r A17
2009-09-15 00:59:58 C 01 27 08.67 +08 04 06.5 r A17
2009-09-15 04:07:41 C 01 27 01.27 +08 01 51.2 r H55
2009-09-15 04:20:35 C 01 27 00.72 +08 01 42.0 r H55
2009-09-15 04:34:15 C 01 27 00.14 +08 01 32.0 r H55
2009-09-15 08:07:34 C 01 26 50.82 +07 58 57.5 o 291
2009-09-15 08:12:57 C 01 26 50.62 +07 58 54.0 o 291
2009-09-15 08:13:25 C 01 26 50.54 +07 58 54.9 19.5 c 704
2009-09-15 08:18:27 C 01 26 50.44 +07 58 51.0 o 291
2009-09-15 08:30:14 C 01 26 49.79 +07 58 42.7 19.8 c 704
2009-09-15 08:34:36 C 01 26 49.63 +07 58 38.0 c 854
2009-09-15 08:42:53 C 01 26 49.27 +07 58 33.0 c 854
2009-09-15 08:47:00 C 01 26 49.00 +07 58 30.2 20.0 c 704
2009-09-15 08:59:28 C 01 26 48.53 +07 58 19.4 c 854
2009-09-15 09:03:48 C 01 26 48.26 +07 58 17.9 20.1 c 704
2009-09-15 09:20:58 C 01 26 47.55 +07 58 05.1 20.3 c 704
2009-09-17 23:30:53 C 01 24 02.94 +07 11 50.4 o B88
2009-09-17 23:48:06 C 01 24 02.10 +07 11 37.7 o B88
2009-09-18 00:05:17 C 01 24 01.23 +07 11 24.8 o B88
2009-09-18 07:02:47 C 01 23 41.91 +07 06 10.5 o H55
2009-09-18 07:07:08 C 01 23 41.70 +07 06 07.3 o H55
2009-09-18 07:11:29 C 01 23 41.49 +07 06 04.0 o H55
2009-09-20 07:18:42 C 01 21 23.97 +06 29 21.7 o 691
2009-09-20 07:44:04 C 01 21 22.64 +06 29 02.0 o 691
2009-09-20 08:09:27 C 01 21 21.34 +06 28 42.9 o 691
2009-09-23 00:57:24 C 01 18 05.44 +05 38 22.8 v 204
2009-09-23 01:05:30 C 01 18 04.99 +05 38 16.6 v 204
2009-09-23 02:14:56 C 01 18 01.20 +05 37 22.3 v 204
2009-09-24 16:12:29 C 01 16 02.52 +05 07 55.5 c D21
2009-09-24 16:20:58 C 01 16 01.97 +05 07 49.7 c D21
2009-09-24 16:29:27 C 01 16 01.55 +05 07 41.9 c D21
2009-09-25 05:31:42 C 01 15 20.26 +04 57 15.0 o 691
2009-09-25 05:57:13 C 01 15 18.87 +04 56 54.6 o 691
2009-09-25 06:22:39 C 01 15 17.44 +04 56 34.6 o 691