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
2019-06-01 21:28:27 C 12 36 39.89 +40 58 36.4 – q 160
2019-06-01 21:31:23 C 12 36 41.10 +40 58 37.2 – q 160
2019-06-03 05:57:14 C 12 49 34.02 +41 03 58.7 – V 703
2019-06-03 06:04:52 C 12 49 36.94 +41 03 58.0 – V 703
2019-06-03 06:12:29 C 12 49 39.76 +41 03 58.4 – V 703
2019-06-03 06:20:07 C 12 49 42.64 +41 03 58.5 – V 703
2019-06-03 22:26:16 C 12 55 48.89 +41 04 09.0 – V Z80
2019-06-03 22:29:36 C 12 55 50.09 +41 04 08.8 – V Z80
2019-06-03 22:32:56 C 12 55 51.34 +41 04 08.3 – V Z80
2019-06-04 01:04:58 C 12 56 48.71 +41 04 11.9 – q I15
2019-06-04 01:06:43 C 12 56 49.34 +41 04 12.0 – q I15
2019-06-04 01:08:29 C 12 56 49.99 +41 04 11.9 – q I15
2019-06-04 04:47:40 C 12 58 10.53 +41 04 06.2 – U I41
2019-06-04 04:49:01 C 12 58 11.01 +41 04 06.2 – U I41
2019-06-04 05:17:57 C 12 58 21.35 +41 04 03.9 – U I41
2019-06-04 05:19:18 C 12 58 21.83 +41 04 03.8 – U I41
2019-06-04 21:42:23 C 13 04 16.41 +41 02 17.0 – V G34
2019-06-04 21:44:14 C 13 04 17.04 +41 02 16.7 – V G34
2019-06-04 21:46:16 C 13 04 17.76 +41 02 16.3 – V G34
2019-06-04 21:48:29 C 13 04 18.52 +41 02 15.8 – V G34
2019-06-04 23:07:42 C 13 04 46.59 +41 01 58.4 15.7 r 238
2019-06-04 23:12:49 C 13 04 48.25 +41 01 58.3 15.0 r 238
2019-06-06 21:43:48 C 13 20 29.91 +40 51 04.4 – V L39
2019-06-06 21:45:44 C 13 20 30.53 +40 51 03.9 – V L39
2019-06-07 06:46:08 C 13 23 21.92 +40 48 03.0 – V 703
2019-06-07 06:53:51 C 13 23 24.29 +40 47 59.8 – V 703
2019-06-07 07:01:34 C 13 23 26.69 +40 47 56.5 – V 703
2019-06-07 07:09:16 C 13 23 29.05 +40 47 53.5 – V 703
2019-06-08 06:04:52 C 13 30 34.31 +40 39 05.5 – V T08
2019-06-08 06:09:31 C 13 30 35.65 +40 39 03.6 – V T08
2019-06-08 06:17:29 C 13 30 37.96 +40 39 00.2 – V T08
2019-06-08 06:41:54 C 13 30 45.02 +40 38 49.9 – V T08
2019-06-09 04:52:30 C 13 37 14.28 +40 28 33.0 – V G96
2019-06-09 05:00:42 C 13 37 16.54 +40 28 28.8 – V G96
2019-06-09 05:08:53 C 13 37 18.81 +40 28 24.6 – V G96
2019-06-09 05:17:02 C 13 37 21.08 +40 28 20.5 – V G96
2019-06-10 02:13:45 C 13 43 13.17 +40 17 32.1 – q I15
2019-06-10 02:15:54 C 13 43 13.74 +40 17 30.8 – q I15
2019-06-10 02:18:04 C 13 43 14.33 +40 17 29.7 – q I15
2019-06-11 21:29:42 S 13 54 34.646 +39 52 29.28 – L C51
2019-06-11 21:29:53 S 13 54 34.682 +39 52 28.70 – L C51
2019-06-11 23:03:57 S 13 54 58.255 +39 51 30.46 – L C51
2019-06-12 07:46:51 C 13 57 06.79 +39 46 10.8 – V T08
2019-06-12 07:51:32 C 13 57 07.91 +39 46 07.7 – V T08
2019-06-12 07:58:51 C 13 57 09.63 +39 46 03.1 – V T08
2019-06-12 08:14:12 C 13 57 13.26 +39 45 53.0 – V T08
2019-06-12 22:11:47 C 14 00 36.09 +39 36 41.9 – V J27
2019-06-12 22:17:12 C 14 00 37.35 +39 36 38.0 – V J27
2019-06-12 22:23:45 C 14 00 38.85 +39 36 33.6 – V J27
2019-06-13 07:33:27 C 14 02 49.213 +39 30 38.55 – U F52
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)