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
2023-09-19 05:10:59 C 23 08 23.626 +03 29 16.55 V G96
2023-09-19 05:27:16 C 23 08 22.322 +03 29 10.82 V G96
2023-09-19 05:35:25 C 23 08 21.653 +03 29 07.01 V G96
2023-09-19 07:36:58 C 23 08 12.008 +03 28 24.92 V V00
2023-09-19 07:44:54 C 23 08 11.375 +03 28 22.26 V V00
2023-09-19 07:52:49 C 23 08 10.756 +03 28 19.34 V V00
2023-09-19 08:00:44 C 23 08 10.115 +03 28 16.61 V V00
2023-10-17 05:11:11 C 22 17 07.489 -01 05 09.04 X F51
2023-10-17 05:30:12 C 22 17 06.225 -01 05 16.68 X F51
2023-10-17 05:50:19 C 22 17 04.900 -01 05 24.66 X F51
2023-10-17 06:09:21 C 22 17 03.639 -01 05 32.32 X F51