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
2019-07-08 07:37:26 C 15 32 43.382 +31 09 02.47 – U F51
2019-07-08 07:51:49 C 15 32 44.779 +31 08 49.54 – U F51
2019-07-08 08:06:05 C 15 32 46.169 +31 08 36.68 – U F51
2019-07-08 09:19:48 S 15 32 54.31 +31 07 27.4 – L C51
2019-07-08 15:36:38 S 15 33 32.58 +31 01 51.4 – L C51
2019-07-08 18:44:57 S 15 33 51.65 +30 59 03.5 – L C51
2019-07-08 21:53:27 S 15 34 10.69 +30 56 15.5 – L C51
2019-07-08 22:07:41 n 15 34 11.55 +30 55 58.8 – V Z43
2019-07-08 22:28:35 n 15 34 13.59 +30 55 40.1 – V Z43
2019-07-08 22:43:25 n 15 34 15.03 +30 55 26.0 – V Z43
2019-07-08 22:56:13 n 15 34 16.30 +30 55 14.4 – V Z43
2019-07-08 23:09:53 n 15 34 17.63 +30 55 02.6 – V Z43
2019-07-09 01:01:46 S 15 34 29.64 +30 53 27.4 – L C51
2019-07-09 02:40:08 C 15 34 38.98 +30 51 57.3 – q I15
2019-07-09 02:44:17 C 15 34 39.39 +30 51 53.6 – q I15
2019-07-09 02:48:27 C 15 34 39.80 +30 51 49.8 – q I15
2019-07-09 04:09:21 S 15 34 48.49 +30 50 40.9 – L C51
2019-07-09 04:09:32 S 15 34 48.54 +30 50 40.6 – L C51
2019-07-09 07:18:34 S 15 35 07.49 +30 47 50.9 – L C51
2019-07-09 10:26:54 S 15 35 26.29 +30 45 03.2 – L C51
2019-07-09 13:34:39 S 15 35 45.00 +30 42 16.3 – L C51
2019-07-09 16:43:43 S 15 36 03.86 +30 39 27.2 – L C51
2019-07-09 19:52:02 S 15 36 22.61 +30 36 39.0 – L C51
2019-07-09 23:00:32 S 15 36 41.26 +30 33 51.5 – L C51
2019-07-10 02:08:51 S 15 36 59.87 +30 31 03.4 – L C51
2019-07-10 05:16:26 S 15 37 18.401 +30 28 17.08 – L C51
2019-07-10 05:16:37 S 15 37 18.389 +30 28 16.50 – L C51
2019-07-10 06:51:25 S 15 37 27.71 +30 26 51.0 – L C51
2019-07-10 07:28:03 C 15 37 30.39 +30 26 15.6 – V 719
2019-07-10 07:34:24 C 15 37 30.77 +30 26 09.5 – V 719
2019-07-10 08:25:40 S 15 37 36.97 +30 25 26.7 – L C51
2019-07-10 11:08:06 C 15 37 51.69 +30 23 01.7 – V T08
2019-07-10 11:13:25 C 15 37 52.21 +30 22 56.7 – V T08
2019-07-10 11:27:32 C 15 37 53.57 +30 22 43.8 – V T08
2019-07-10 11:33:15 S 15 37 55.38 +30 22 41.0 – L C51
2019-07-10 11:51:50 C 15 37 55.92 +30 22 21.3 – V T08
2019-07-10 13:07:30 S 15 38 04.65 +30 21 16.5 – L C51
2019-07-10 14:25:24 C 15 38 11.55 +30 20 05.6 – q D29
2019-07-10 15:13:45 C 15 38 16.13 +30 19 22.0 – q D29
2019-07-10 16:16:33 S 15 38 23.158 +30 18 27.07 – L C51
2019-07-10 17:50:48 S 15 38 32.34 +30 17 03.3 – L C51
2019-07-10 19:25:03 S 15 38 41.527 +30 15 39.28 – L C51
2019-07-10 20:59:08 S 15 38 50.66 +30 14 15.3 – L C51
2019-07-10 22:41:29 C 15 38 59.84 +30 12 39.6 – q 160
2019-07-10 22:44:25 C 15 39 00.11 +30 12 37.0 – q 160
2019-07-10 22:47:23 C 15 39 00.38 +30 12 34.3 – q 160
2019-07-10 23:43:51 C 15 39 05.86 +30 11 44.6 – V J27
2019-07-10 23:48:03 C 15 39 06.27 +30 11 40.9 – V J27
2019-07-10 23:54:41 C 15 39 06.89 +30 11 34.8 – V J27
2019-07-11 00:01:29 C 15 39 07.52 +30 11 28.6 – V J27
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)