IAA RAS IAA Minor Planet Database

12538 (1998 OH)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4059016556 ± 4.35e-09
Semi-major axis (a)1.5415724184 AU ± 7.25e-10
Inclination (i)24.53563599° ± 8.41e-07
Long. of Asc. Node (Ω)220.68792372° ± 1.75e-06
Arg. of Perihelion (ω)321.78911043° ± 1.84e-06
Mean Anomaly (M)163.00612547° ± 9.55e-07
Mean Motion (n)0.5149515611°/day ± 3.63e-10
Perihelion dist (q)0.91584562 AU ± 6.72e-09
Aphelion dist (Q)2.16729922 AU ± 6.78e-09
Orbital Period1.91401747 yr ± 1.35e-09
Physical Parameters
H (abs. magnitude)15.96
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.272″
Uncertainty0
Orbit TypeApollo
MOID0.029256 AU
Observations Used10512
Radar Obs Used1
Gaia Obs Used113
Oppositions14
Arc Total1987-2025
First Observation Used1987-08-22
Last Observation Used2025-12-01
Observations (19002)
Date Type RA Dec Mag Band Observatory
2016-10-09 04:47:01 C 03 33 07.16 +22 25 13.8 18.5 q J43
2016-10-09 04:59:06 C 03 33 06.82 +22 25 06.5 18.4 q J43
2016-10-10 09:14:57 C 03 32 22.36 +22 08 05.9 – q 703
2016-10-10 09:23:38 C 03 32 22.07 +22 08 00.1 – q 703
2016-10-10 09:32:20 C 03 32 21.79 +22 07 54.3 – q 703
2016-10-10 09:41:00 C 03 32 21.39 +22 07 49.3 – q 703
2016-10-12 12:09:56 C 03 30 51.74 +21 35 45.5 – L T05
2016-10-12 12:23:15 C 03 30 51.31 +21 35 36.7 – L T05
2016-10-12 12:50:26 C 03 30 50.35 +21 35 19.3 – L T05
2016-10-12 13:05:26 C 03 30 49.80 +21 35 10.6 – L T05
2016-10-12 13:20:17 C 03 30 49.23 +21 34 59.2 – L T05
2016-10-20 11:42:18 C 03 23 18.13 +19 14 08.4 – L T05
2016-10-20 11:46:33 C 03 23 17.89 +19 14 05.0 – L T05
2016-10-20 12:07:13 C 03 23 16.80 +19 13 48.0 – L T05
2016-10-20 12:12:11 C 03 23 16.60 +19 13 44.5 – L T05
2016-10-20 12:20:24 C 03 23 16.16 +19 13 37.7 – L T05
2016-10-20 12:23:58 C 03 23 15.97 +19 13 35.2 – L T05
2016-10-20 12:38:00 C 03 23 15.36 +19 13 23.4 – L T05
2016-10-20 12:40:10 C 03 23 15.22 +19 13 21.0 – L T05
2016-10-20 12:52:21 C 03 23 14.63 +19 13 11.4 – L T05
2016-10-20 22:48:38 C 03 22 46.64 +19 04 52.3 – q Z80
2016-10-20 22:57:13 C 03 22 46.21 +19 04 44.4 – q Z80
2016-10-20 23:08:32 C 03 22 45.72 +19 04 35.4 – q Z80
2016-10-21 07:43:45 C 03 22 20.73 +18 57 27.4 – q 703
2016-10-21 07:52:26 C 03 22 20.29 +18 57 19.9 – q 703
2016-10-21 08:01:07 C 03 22 19.89 +18 57 12.5 – q 703
2016-10-21 08:09:47 C 03 22 19.41 +18 57 05.4 – q 703
2016-10-22 03:09:26 C 03 21 23.61 +18 40 55.7 – V G45
2016-10-22 04:30:36 C 03 21 19.49 +18 39 46.8 – V G45
2016-10-22 07:10:07 C 03 21 11.19 +18 37 30.8 – V G45
2016-10-22 08:23:59 C 03 21 07.30 +18 36 27.1 – V G45
2016-10-22 08:24:12 C 03 21 07.28 +18 36 27.0 – V G45
2016-10-22 09:33:29 C 03 21 03.63 +18 35 26.9 – V G45
2016-10-22 10:31:54 C 03 21 00.55 +18 34 36.5 – V G45
2016-10-22 11:26:19 C 03 20 57.69 +18 33 49.1 – V G45
2016-10-22 12:00:38 C 03 20 55.89 +18 33 19.1 – V G45
2016-10-23 04:29:07 C 03 20 06.09 +18 18 56.7 – V G45
2016-10-23 05:42:30 C 03 20 02.15 +18 17 52.8 – V G45
2016-10-23 06:58:43 C 03 19 58.02 +18 16 46.2 – V G45
2016-10-23 08:12:37 C 03 19 54.00 +18 15 41.1 – V G45
2016-10-23 08:13:37 C 03 19 53.96 +18 15 40.2 – V G45
2016-10-23 09:19:41 C 03 19 50.34 +18 14 41.7 – V G45
2016-10-23 09:23:58 C 03 19 50.11 +18 14 37.8 – V G45
2016-10-23 10:28:29 C 03 19 46.60 +18 13 40.6 – V G45
2016-10-23 11:16:30 C 03 19 43.99 +18 12 58.0 – V G45
2016-10-23 11:53:20 C 03 19 42.00 +18 12 25.2 – V G45
2016-10-24 09:52:42 C 03 18 32.03 +17 52 45.3 – q G96
2016-10-24 10:04:18 C 03 18 31.37 +17 52 34.6 – q G96
2016-10-24 10:14:44 C 03 18 30.80 +17 52 24.6 – q G96
2016-10-24 10:20:59 C 03 18 30.43 +17 52 19.5 – q G96
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2019-05-14 21:19:00 24772.1678 4 Hz 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)