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
2019-06-20 17:26:43 S 14 38 16.33 +37 15 56.9 – L C51
2019-06-20 19:00:46 S 14 38 32.27 +37 14 40.1 – L C51
2019-06-20 20:35:02 S 14 38 48.20 +37 13 22.7 – L C51
2019-06-20 22:09:17 S 14 39 04.06 +37 12 05.5 – L C51
2019-06-20 22:17:15 n 14 39 04.50 +37 11 55.3 – V Z43
2019-06-20 22:30:26 n 14 39 06.64 +37 11 44.1 – V Z43
2019-06-20 22:38:56 n 14 39 08.04 +37 11 36.4 – V Z43
2019-06-20 22:47:46 n 14 39 09.49 +37 11 29.0 – V Z43
2019-06-20 23:01:55 n 14 39 11.79 +37 11 17.7 – V Z43
2019-06-20 23:12:45 n 14 39 13.57 +37 11 08.5 – V Z43
2019-06-20 23:43:21 S 14 39 19.90 +37 10 48.6 – L C51
2019-06-21 01:17:36 S 14 39 35.69 +37 09 31.4 – L C51
2019-06-21 02:51:50 S 14 39 51.45 +37 08 13.7 – L C51
2019-06-21 04:25:55 S 14 40 07.15 +37 06 56.4 – L C51
2019-06-21 06:00:10 S 14 40 22.82 +37 05 38.8 – L C51
2019-06-21 06:31:51 C 14 40 26.67 +37 05 13.2 – V 703
2019-06-21 06:39:37 C 14 40 27.92 +37 05 06.6 – V 703
2019-06-21 06:44:33 C 14 40 28.65 +37 05 01.1 – V 719
2019-06-21 06:47:25 C 14 40 29.18 +37 05 00.1 – V 703
2019-06-21 06:51:00 C 14 40 29.84 +37 04 55.0 – V 719
2019-06-21 06:55:12 C 14 40 30.43 +37 04 53.4 – V 703
2019-06-21 07:34:25 S 14 40 38.45 +37 04 21.3 – L C51
2019-06-21 09:08:29 S 14 40 54.014 +37 03 04.14 – L C51
2019-06-21 09:08:40 S 14 40 54.053 +37 03 03.60 – L C51
2019-06-21 10:42:44 S 14 41 09.60 +37 01 46.2 – L C51
2019-06-21 12:16:59 S 14 41 25.11 +37 00 28.4 – L C51
2019-06-21 13:51:14 S 14 41 40.60 +36 59 10.6 – L C51
2019-06-21 15:25:18 S 14 41 55.98 +36 57 53.1 – L C51
2019-06-21 16:59:33 S 14 42 11.40 +36 56 35.0 – L C51
2019-06-21 18:33:48 S 14 42 26.77 +36 55 16.8 – L C51
2019-06-21 20:07:52 S 14 42 42.08 +36 53 59.0 – L C51
2019-06-21 20:08:03 S 14 42 42.08 +36 53 58.4 – L C51
2019-06-21 21:42:07 S 14 42 57.31 +36 52 40.9 – L C51
2019-06-21 23:16:22 S 14 43 12.58 +36 51 22.4 – L C51
2019-06-22 00:50:37 S 14 43 27.80 +36 50 04.0 – L C51
2019-06-22 02:24:41 S 14 43 42.96 +36 48 46.1 – L C51
2019-06-22 03:58:56 S 14 43 58.10 +36 47 27.6 – L C51
2019-06-22 05:33:12 S 14 44 13.18 +36 46 09.1 – L C51
2019-06-22 07:07:15 S 14 44 28.23 +36 44 51.2 – L C51
2019-06-22 08:41:30 S 14 44 43.25 +36 43 32.3 – L C51
2019-06-22 10:15:45 S 14 44 58.24 +36 42 13.7 – L C51
2019-06-22 13:24:04 S 14 45 28.08 +36 39 36.3 – L C51
2019-06-22 16:32:34 S 14 45 57.82 +36 36 58.6 – L C51
2019-06-22 19:40:54 S 14 46 27.35 +36 34 21.1 – L C51
2019-06-22 22:49:12 S 14 46 56.77 +36 31 43.5 – L C51
2019-06-23 01:57:43 S 14 47 26.06 +36 29 04.6 – L C51
2019-06-23 05:06:01 S 14 47 55.21 +36 26 26.7 – L C51
2019-06-23 06:24:29 C 14 48 05.90 +36 25 20.1 – V 719
2019-06-23 08:14:32 S 14 48 24.21 +36 23 48.2 – L C51
2019-06-23 11:22:50 S 14 48 53.07 +36 21 09.5 – L C51
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)