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
2001-06-23 11:08:26 C 23 39 51.08 +23 29 11.1 o 644
2001-06-23 11:24:19 C 23 39 52.11 +23 29 23.5 o 644
2001-08-09 11:33:25 C 00 16 20.18 +32 03 09.3 o 644
2001-08-09 11:49:25 C 00 16 19.98 +32 03 11.0 o 644
2001-08-09 12:04:45 C 00 16 19.84 +32 03 12.2 o 644
2001-09-07 09:26:09 C 23 56 58.65 +29 38 26.1 o 644
2001-09-07 09:56:39 C 23 56 57.32 +29 38 10.8 o 644
2001-09-07 10:27:26 C 23 56 55.95 +29 37 55.0 o 644
2001-09-21 06:29:34 C 23 43 23.63 +26 10 56.4 o 644
2001-09-21 07:01:36 C 23 43 22.29 +26 10 33.3 o 644
2001-09-26 04:17:30 C 23 39 06.33 +24 44 03.5 o 644
2001-09-26 05:18:46 C 23 39 04.15 +24 43 17.7 o 644
2001-09-30 09:11:43 C 23 35 49.87 +23 26 57.9 o 644
2001-09-30 09:44:06 C 23 35 48.87 +23 26 33.4 o 644
2001-09-30 10:14:37 C 23 35 47.89 +23 26 09.2 o 644
2006-09-28 07:25:22 C 23 58 00.44 +24 41 07.5 r 703
2006-09-28 07:35:31 C 23 58 00.12 +24 40 59.9 r 703
2006-09-28 07:45:45 C 23 57 59.65 +24 40 52.3 r 703
2006-09-28 07:55:56 C 23 57 59.18 +24 40 44.4 r 703
2011-09-20 12:51:03 C 00 16 17.379 +26 54 20.88 L F51
2011-09-20 13:10:53 C 00 16 16.471 +26 54 08.96 L F51
2011-09-20 13:29:10 C 00 16 15.646 +26 53 58.05 L F51
2011-09-21 12:05:58 C 00 15 17.303 +26 40 28.89 o 568
2011-09-21 13:31:07 C 00 15 13.483 +26 39 36.90 o 568
2011-09-21 23:47:06 C 00 14 47.16 +26 33 21.1 u B18
2011-09-21 23:52:10 C 00 14 46.90 +26 33 17.5 u B18
2011-09-21 23:57:14 C 00 14 46.68 +26 33 14.7 u B18
2011-09-22 00:16:17 C 00 14 45.80 +26 33 02.4 u B18
2011-09-22 00:21:18 C 00 14 45.60 +26 32 59.2 u B18
2011-09-25 05:21:18 C 00 11 29.80 +25 44 41.0 u H15
2011-09-25 05:41:20 C 00 11 28.99 +25 44 29.0 u H15
2011-09-25 06:01:17 C 00 11 28.10 +25 44 15.4 u H15
2011-09-25 06:21:11 C 00 11 27.09 +25 44 03.2 u H15
2011-09-25 10:42:29 C 00 11 15.88 +25 41 12.6 v H15
2011-09-25 10:55:05 C 00 11 15.33 +25 41 04.3 v H15
2011-09-25 11:07:34 C 00 11 14.77 +25 40 56.7 v H15
2011-09-25 22:18:09 C 00 10 47.53 +25 33 41.8 t J04
2011-09-25 22:25:04 C 00 10 47.24 +25 33 37.3 t J04
2011-09-25 22:31:58 C 00 10 46.95 +25 33 32.9 t J04
2011-09-30 23:02:01 C 00 05 56.26 +24 12 26.7 t 204
2011-09-30 23:18:37 C 00 05 55.61 +24 12 15.0 t 204
2011-09-30 23:35:15 C 00 05 54.95 +24 12 03.8 t 204
2011-10-08 04:50:21 C 23 59 47.28 +22 10 03.1 o H21
2011-10-08 04:59:18 C 23 59 46.96 +22 09 56.6 o H21
2011-10-08 05:08:34 C 23 59 46.66 +22 09 49.7 o H21
2011-10-16 06:53:14 C 23 54 26.60 +19 53 11.7 o 291
2011-10-16 06:57:24 C 23 54 26.53 +19 53 08.5 o 291
2011-10-16 07:01:34 C 23 54 26.42 +19 53 06.3 o 291
2011-10-18 05:31:24 C 23 53 25.90 +19 21 08.9 o 291
2011-10-18 05:36:34 C 23 53 25.77 +19 21 05.0 o 291