2011 SZ21

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5603917125 ± 2.87e-08
Semi-major axis (a)2.9446010745 AU ± 9.11e-09
Inclination (i)16.49191384° ± 2.54e-06
Long. of Asc. Node (Ω)229.34203148° ± 9.77e-06
Arg. of Perihelion (ω)41.19527697° ± 1.33e-05
Mean Anomaly (M)317.45743301° ± 1.48e-06
Mean Motion (n)0.1950619569°/day ± 9.05e-10
Perihelion dist (q)1.29447104 AU ± 8.47e-08
Aphelion dist (Q)4.59473111 AU ± 8.58e-08
Orbital Period5.05288832 yr ± 2.35e-08
Physical Parameters
H (abs. magnitude)17.51
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.200″
Uncertainty0
Orbit TypeAmor
MOID0.328453 AU
Observations Used279
Oppositions16
Arc Total2001-2021
First Observation Used2001-06-23
Last Observation Used2021-11-10
Observations (321)
Date Type RA Dec Mag Band Observatory
2011-10-18 05:41:44 C 23 53 25.66 +19 21 01.7 o 291
2011-10-19 03:55:16 C 23 52 59.12 +19 05 56.0 o 291
2011-10-19 04:00:27 C 23 52 59.03 +19 05 52.8 o 291
2011-10-19 04:05:37 C 23 52 58.88 +19 05 49.4 o 291
2011-11-03 03:03:43 C 23 49 16.10 +15 25 38.3 r G96
2011-11-03 03:14:42 C 23 49 16.10 +15 25 32.5 r G96
2011-11-03 03:25:41 C 23 49 16.06 +15 25 26.6 r G96
2011-11-03 03:36:38 C 23 49 16.03 +15 25 20.5 r G96
2014-11-24 12:51:47 C 08 41 32.50 +00 19 04.7 1 T09
2014-11-24 13:01:02 C 08 41 32.47 +00 19 02.8 1 T09
2014-11-24 13:19:36 C 08 41 32.45 +00 18 58.8 1 T09
2014-11-24 13:35:02 C 08 41 32.40 +00 18 55.6 1 T09
2014-11-24 14:13:29 C 08 41 32.31 +00 18 47.7 1 T09
2014-11-25 13:17:37 C 08 41 29.63 +00 14 00.4 1 T09
2014-11-25 13:31:02 C 08 41 29.59 +00 13 57.7 1 T09
2014-11-25 13:48:49 C 08 41 29.56 +00 13 54.1 1 T09
2014-11-25 15:25:18 C 08 41 29.25 +00 13 34.1 1 T09
2014-11-28 11:51:52 C 08 41 15.37 -00 00 18.5 1 T09
2014-11-28 14:15:39 C 08 41 14.61 -00 00 47.1 1 T09
2014-11-28 14:35:15 C 08 41 14.49 -00 00 51.1 1 T09
2016-04-14 11:51:06 C 19 54 56.59 -12 30 10.8 o 691
2016-04-14 11:54:41 C 19 54 57.06 -12 30 06.3 o 691
2016-04-14 11:58:15 C 19 54 57.62 -12 30 01.6 o 691
2016-05-20 17:34:14 S 21 43 47.16 +07 16 08.3 L C51
2016-05-20 20:42:55 S 21 44 07.03 +07 20 20.6 L C51
2016-05-20 22:17:21 S 21 44 16.94 +07 22 27.1 L C51
2016-05-20 23:51:36 S 21 44 26.89 +07 24 32.7 L C51
2016-05-21 04:34:43 S 21 44 56.54 +07 30 50.0 L C51
2016-05-21 18:43:42 S 21 46 25.28 +07 49 39.8 L C51
2016-05-21 18:43:53 S 21 46 25.39 +07 49 41.3 L C51
2016-05-21 20:18:08 S 21 46 35.21 +07 51 47.2 L C51
2016-05-21 23:26:49 S 21 46 54.80 +07 55 58.0 L C51
2016-05-22 01:01:15 S 21 47 04.59 +07 58 03.7 L C51
2016-05-22 02:35:30 S 21 47 14.43 +08 00 07.0 L C51
2016-05-22 18:18:56 S 21 48 52.03 +08 20 56.1 L C51
2016-05-22 21:27:37 S 21 49 11.46 +08 25 05.6 L C51
2016-05-23 10:02:21 S 21 50 28.94 +08 41 38.3 L C51
2016-05-31 11:26:42 S 22 09 18.89 +12 47 48.7 L C51
2016-06-01 01:35:41 S 22 10 36.99 +13 05 07.1 L C51
2016-06-01 03:10:07 S 22 10 45.60 +13 07 03.9 L C51
2016-06-01 15:44:51 S 22 11 54.40 +13 22 19.8 L C51
2016-06-01 17:19:07 S 22 12 02.99 +13 24 14.3 L C51
2016-06-02 05:53:51 S 22 13 11.33 +13 39 27.0 L C51
2016-06-02 09:02:32 S 22 13 28.32 +13 43 14.2 L C51
2016-06-02 15:19:54 S 22 14 02.17 +13 50 46.8 L C51
2016-06-02 18:28:35 S 22 14 19.06 +13 54 33.7 L C51
2016-06-06 09:31:15 C 22 21 54.53 +15 36 47.3 q 703
2016-06-06 09:39:54 C 22 21 55.19 +15 36 56.7 q 703
2016-06-06 09:48:33 C 22 21 55.92 +15 37 05.7 q 703
2016-06-11 09:38:40 C 22 31 40.27 +17 50 43.9 R G45