IAA RAS IAA Minor Planet Database

1998 SH2

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.7138620135 ± 1.49e-08
Semi-major axis (a)2.7430809123 AU ± 1.67e-08
Inclination (i)2.42591843° ± 2.63e-06
Long. of Asc. Node (Ω)6.07706071° ± 2.56e-05
Arg. of Perihelion (ω)268.71719953° ± 2.65e-05
Mean Anomaly (M)26.60077850° ± 1.56e-07
Mean Motion (n)0.2169473497°/day ± 1.98e-09
Perihelion dist (q)0.78489965 AU ± 4.11e-08
Aphelion dist (Q)4.70126218 AU ± 4.99e-08
Orbital Period4.54315890 yr ± 4.15e-08
NGA Modelr2
A2-5.75894754e-13 ± 2.37e-14 AU/d²
Physical Parameters
H (abs. magnitude)20.88
G (slope)0.15
Alternative Designations

2016 EC156

Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.197″
Uncertainty0
Orbit TypeApollo
MOID0.019237 AU
Observations Used341
Radar Obs Used1
Oppositions21
Arc Total1998-2025
First Observation Used1998-09-17
Last Observation Used2025-10-25
Observations (378)
Date Type RA Dec Mag Band Observatory
2016-02-29 11:37:31 C 11 41 40.81 +04 02 54.1 – t F51
2016-03-10 05:30:59 C 11 27 51.69 +05 19 46.9 – q G96
2016-03-10 05:35:25 C 11 27 51.37 +05 19 48.7 – q G96
2016-03-10 05:39:50 C 11 27 51.06 +05 19 50.4 – q G96
2016-03-10 05:44:16 C 11 27 50.73 +05 19 51.7 – q G96
2016-03-10 08:26:27 C 11 27 38.64 +05 20 54.0 – q G96
2016-03-10 08:29:07 C 11 27 38.43 +05 20 55.0 – q G96
2016-03-10 08:31:46 C 11 27 38.25 +05 20 56.3 – q G96
2016-03-10 08:34:27 C 11 27 38.04 +05 20 57.6 – q G96
2016-03-11 05:08:33 C 11 26 09.47 +05 28 58.8 – o 691
2016-03-11 05:14:08 C 11 26 09.07 +05 29 00.5 – o 691
2016-03-11 05:15:04 C 11 26 08.45 +05 29 15.1 – u 807
2016-03-11 05:19:43 C 11 26 08.67 +05 29 02.6 – o 691
2016-03-11 05:29:53 C 11 26 07.30 +05 29 20.8 – u 807
2016-03-11 05:42:29 C 11 26 06.92 +05 29 10.7 – q I52
2016-03-11 05:44:04 C 11 26 06.22 +05 29 26.5 – u 807
2016-03-11 05:56:00 C 11 26 05.82 +05 29 16.7 – q I52
2016-03-11 06:01:54 C 11 26 05.37 +05 29 19.0 – q I52
2016-03-11 06:08:35 C 11 26 04.84 +05 29 22.1 – q I52
2016-03-11 07:09:04 C 11 26 00.22 +05 29 45.9 – q I52
2016-03-11 07:13:16 C 11 25 59.92 +05 29 47.5 – q I52
2016-03-11 07:17:28 C 11 25 59.58 +05 29 48.9 – q I52
2016-03-11 07:21:39 C 11 25 59.26 +05 29 51.0 – q I52
2016-03-12 05:05:38 C 11 24 22.32 +05 38 33.1 – q G96
2016-03-12 05:09:01 C 11 24 22.06 +05 38 34.3 – o 691
2016-03-12 05:10:28 C 11 24 21.99 +05 38 34.5 – q G96
2016-03-12 05:15:18 C 11 24 21.57 +05 38 36.2 – q G96
2016-03-12 05:20:08 C 11 24 21.19 +05 38 38.1 – q G96
2016-03-12 05:28:49 C 11 24 20.47 +05 38 42.8 – o 691
2016-03-12 05:49:40 C 11 24 18.83 +05 38 51.0 – o 691
2016-03-14 09:03:47 C 11 20 17.56 +06 00 04.4 – o 691
2016-03-14 09:11:34 C 11 20 16.75 +06 00 08.3 – o 691
2016-03-14 09:19:22 C 11 20 16.11 +06 00 11.6 – o 691
2016-03-15 07:10:35 C 11 18 29.09 +06 09 34.7 – o 691
2016-03-15 07:15:55 C 11 18 28.73 +06 09 36.9 – o 691
2016-03-15 07:21:16 C 11 18 28.26 +06 09 38.9 – o 691
2016-03-15 11:45:15 C 11 18 05.929 +06 11 36.19 – t 568
2016-03-15 11:46:03 C 11 18 05.865 +06 11 36.49 – t 568
2016-03-15 11:46:42 C 11 18 05.805 +06 11 36.80 – t 568
2016-03-15 11:48:36 C 11 18 05.632 +06 11 37.64 – t 568
2016-03-16 11:25:25 C 11 16 06.020 +06 21 58.74 – t 568
2016-03-16 11:26:21 C 11 16 05.933 +06 21 59.17 – t 568
2016-03-16 11:27:15 C 11 16 05.861 +06 21 59.56 – t 568
2016-03-27 05:56:58 C 10 51 10.34 +08 24 08.2 – o 926
2016-03-27 06:09:57 C 10 51 08.93 +08 24 14.4 – o 926
2016-03-27 06:22:56 C 10 51 07.48 +08 24 21.1 – o 926
2016-03-27 08:46:31 C 10 50 51.70 +08 25 30.4 – o 291
2016-03-27 08:57:52 C 10 50 50.47 +08 25 36.0 – o 291
2016-03-27 09:09:13 C 10 50 49.24 +08 25 41.6 – o 291
2016-03-28 06:40:15 C 10 48 32.745 +08 36 17.22 – L F51
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2025-09-02 09:50:00 35184874.99 3 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)