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
2025-09-25 09:15:28 C 23 35 34.351 -03 54 12.42 X F51
2025-09-27 04:07:50 C 23 35 08.131 -03 37 09.80 V W68
2025-09-27 04:13:46 C 23 35 08.054 -03 37 06.74 V W68
2025-09-27 04:59:46 C 23 35 07.306 -03 36 50.62 V W68
2025-09-27 05:08:57 C 23 35 07.181 -03 36 47.20 V W68
2025-09-28 13:46:18 C 23 34 53.914 -03 25 24.17 V P07
2025-09-28 13:46:27 C 23 34 53.957 -03 25 24.38 V P07
2025-09-28 15:06:40 C 23 34 52.822 -03 24 57.20 V P07
2025-09-28 16:04:41 C 23 34 52.008 -03 24 38.23 V P07
2025-09-28 17:16:30 C 23 34 51.034 -03 24 14.11 V P07
2025-09-29 01:49:25 C 23 34 49.594 -03 21 20.56 W W74
2025-09-29 02:48:29 C 23 34 48.872 -03 21 01.32 W W74
2025-09-29 02:52:06 C 23 34 48.828 -03 21 00.15 W W74
2025-09-29 02:55:42 C 23 34 48.783 -03 20 58.97 W W74
2025-09-29 04:11:52 C 23 34 47.823 -03 20 34.04 W W74
2025-09-29 04:19:00 C 23 34 47.735 -03 20 31.73 W W74
2025-09-30 02:00:13 C 23 34 42.327 -03 13 36.29 W W74
2025-09-30 02:07:32 C 23 34 42.247 -03 13 34.05 W W74
2025-09-30 02:52:10 C 23 34 41.777 -03 13 20.11 W W74
2025-09-30 02:59:30 C 23 34 41.695 -03 13 17.89 W W74
2025-09-30 05:48:07 C 23 34 39.904 -03 12 25.40 W W74
2025-09-30 05:55:19 C 23 34 39.835 -03 12 23.12 W W74
2025-10-02 04:51:43 C 23 34 33.748 -02 58 54.52 V G96
2025-10-02 04:59:56 C 23 34 33.683 -02 58 52.18 V G96
2025-10-02 05:08:06 C 23 34 33.622 -02 58 49.87 V G96
2025-10-02 05:16:16 C 23 34 33.550 -02 58 47.24 V G96
2025-10-25 14:52:59 C 23 40 45.506 -00 52 48.10 W O18
2025-10-25 18:02:14 C 23 40 49.093 -00 52 08.40 W O18
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)