621911 (2011 SB16)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.7998161513 ± 4.99e-08
Semi-major axis (a)2.5272608081 AU ± 2.18e-08
Inclination (i)6.88498616° ± 1.01e-05
Long. of Asc. Node (Ω)311.59027883° ± 8.35e-05
Arg. of Perihelion (ω)177.70320238° ± 8.37e-05
Mean Anomaly (M)159.68737304° ± 1.71e-05
Mean Motion (n)0.2453223874°/day ± 3.17e-09
Perihelion dist (q)0.50591680 AU ± 1.26e-07
Aphelion dist (Q)4.54860482 AU ± 1.32e-07
Orbital Period4.01767769 yr ± 5.19e-08
Physical Parameters
H (abs. magnitude)18.83
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.241″
Uncertainty0
Orbit TypeApollo
MOID0.118158 AU
Observations Used106
Oppositions9
Arc Total2011-2023
First Observation Used2011-09-19
Last Observation Used2023-10-17
Observations (111)
Date Type RA Dec Mag Band Observatory
2011-09-19 05:36:15 C 23 01 40.29 +02 33 16.4 r G96
2011-09-19 05:46:48 C 23 01 39.43 +02 33 12.2 r G96
2011-09-19 05:56:53 C 23 01 38.64 +02 33 08.1 r G96
2011-09-19 10:04:53 C 23 01 19.02 +02 31 38.5 r G96
2011-09-19 10:05:52 C 23 01 18.98 +02 31 38.1 r G96
2011-09-19 10:06:53 C 23 01 18.87 +02 31 37.3 r G96
2011-09-19 10:07:52 C 23 01 18.76 +02 31 37.4 r G96
2011-09-20 07:12:58 C 22 59 40.66 +02 23 54.3 r G96
2011-09-20 07:14:03 C 22 59 40.56 +02 23 54.4 r G96
2011-09-20 07:15:06 C 22 59 40.52 +02 23 53.2 r G96
2011-09-20 07:16:11 C 22 59 40.38 +02 23 53.1 r G96
2011-09-21 06:36:06 C 22 57 51.00 +02 15 12.1 o 291
2011-09-21 06:42:49 C 22 57 50.41 +02 15 09.5 o 291
2011-09-21 06:49:36 C 22 57 49.91 +02 15 06.8 o 291
2011-09-26 06:07:20 C 22 48 23.87 +01 28 34.0 o 291
2011-09-26 06:14:01 C 22 48 23.30 +01 28 31.7 o 291
2011-09-26 06:20:25 C 22 48 22.82 +01 28 29.2 o 291
2011-09-27 01:58:54 C 22 46 49.03 +01 20 34.0 t J04
2011-09-27 02:10:07 C 22 46 48.15 +01 20 28.7 t J04
2011-09-27 02:21:00 C 22 46 47.18 +01 20 24.8 t J04
2011-09-28 04:41:07 C 22 44 42.42 +01 09 39.7 o 291
2011-09-28 04:46:32 C 22 44 41.98 +01 09 36.8 o 291
2011-09-28 04:51:57 C 22 44 41.57 +01 09 35.8 o 291
2011-10-16 04:12:38 C 22 13 20.12 -01 47 04.6 o 291
2011-10-16 04:16:23 C 22 13 19.93 -01 47 05.8 o 291
2011-10-16 04:20:02 C 22 13 19.69 -01 47 07.6 o 291
2011-10-24 02:45:06 C 22 02 43.28 -02 55 16.3 o 291
2011-10-24 02:48:17 C 22 02 43.20 -02 55 17.7 o 291
2011-10-24 02:51:29 C 22 02 43.00 -02 55 19.0 o 291
2011-11-29 01:27:53 C 21 49 51.34 -05 17 11.4 o 291
2011-11-29 01:36:15 C 21 49 51.43 -05 17 10.8 o 291
2011-11-29 01:44:33 C 21 49 51.53 -05 17 10.8 o 291
2012-03-25 09:51:53 C 20 02 40.96 -30 20 25.6 o 807
2012-03-25 09:56:29 C 20 02 40.86 -30 20 26.5 o 807
2012-03-25 10:01:05 C 20 02 40.80 -30 20 27.5 o 807
2012-03-26 09:13:00 C 20 02 14.90 -30 25 33.8 o 807
2012-03-26 09:24:50 C 20 02 14.65 -30 25 36.6 o 807
2012-03-26 09:29:19 C 20 02 14.56 -30 25 37.6 o 807
2012-03-26 09:38:02 C 20 02 14.38 -30 25 39.7 o 807
2012-05-19 10:18:43 C 18 38 51.47 -35 14 57.8 u 807
2012-05-19 10:24:29 C 18 38 50.73 -35 14 57.7 u 807
2012-05-24 09:32:11 C 18 23 52.35 -35 17 55.5 u 807
2012-05-24 09:42:59 C 18 23 50.99 -35 17 55.0 u 807
2015-08-17 08:04:43 C 23 49 34.01 +05 31 58.2 u H21
2015-08-17 08:23:09 C 23 49 33.34 +05 31 57.5 u H21
2015-08-17 08:44:03 C 23 49 32.61 +05 31 55.9 u H21
2015-10-02 09:46:35 C 22 38 01.612 +00 44 31.54 L F51
2015-10-02 10:03:57 C 22 38 00.199 +00 44 24.44 L F51
2015-10-02 10:21:13 C 22 37 58.814 +00 44 17.25 L F51
2015-10-03 08:55:22 C 22 36 12.567 +00 34 43.25 L F51