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
2018-12-21 08:49:58 C 03 32 08.85 -16 54 56.6 – V T05
2018-12-21 09:01:20 C 03 32 08.11 -16 55 06.6 – V T05
2018-12-21 09:05:18 C 03 32 07.83 -16 55 10.2 – V T05
2018-12-21 09:13:56 C 03 32 07.27 -16 55 17.7 – V T05
2018-12-21 09:17:13 C 03 32 07.04 -16 55 20.7 – V T05
2018-12-21 09:25:49 C 03 32 06.48 -16 55 28.3 – V T05
2018-12-21 09:29:10 C 03 32 06.26 -16 55 30.9 – V T05
2018-12-21 09:41:03 C 03 32 05.45 -16 55 41.8 – V T05
2019-01-05 03:32:53 C 03 15 40.13 -20 44 25.5 – V G96
2019-01-05 03:40:58 C 03 15 39.86 -20 44 28.9 – V G96
2019-01-05 03:49:04 C 03 15 39.60 -20 44 32.4 – V G96
2019-01-05 03:57:10 C 03 15 39.34 -20 44 35.8 – V G96
2019-01-06 17:15:41 S 03 14 38.40 -20 59 33.7 – L C51
2019-01-06 20:24:11 S 03 14 33.658 -21 00 46.62 – L C51
2019-01-06 23:32:41 S 03 14 28.934 -21 01 58.40 – L C51
2019-01-07 01:06:45 S 03 14 26.666 -21 02 34.48 – L C51
2019-01-07 01:06:56 S 03 14 26.609 -21 02 34.91 – L C51
2019-01-07 05:49:31 S 03 14 19.74 -21 04 20.5 – L C51
2019-01-07 07:23:45 S 03 14 17.48 -21 04 55.8 – L C51
2019-01-07 10:32:04 S 03 14 12.99 -21 06 05.3 – L C51
2019-01-07 10:32:15 S 03 14 12.95 -21 06 05.6 – L C51
2019-01-07 13:40:35 S 03 14 08.56 -21 07 15.1 – L C51
2019-01-09 03:17:40 C 03 13 20.23 -21 20 27.7 – V 703
2019-01-09 03:25:31 C 03 13 20.06 -21 20 30.3 – V 703
2019-01-09 03:33:21 C 03 13 19.86 -21 20 32.9 – V 703
2019-01-09 03:41:12 C 03 13 19.71 -21 20 35.4 – V 703
2019-01-10 07:21:20 C 03 12 49.50 -21 29 17.1 – V T05
2019-01-10 07:25:59 C 03 12 49.41 -21 29 18.4 – V T05
2019-01-10 07:32:40 C 03 12 49.27 -21 29 20.4 – V T05
2019-01-10 07:37:16 C 03 12 49.17 -21 29 21.7 – V T05
2019-01-10 07:43:24 C 03 12 49.05 -21 29 23.6 – V T05
2019-01-10 07:48:01 C 03 12 48.95 -21 29 25.0 – V T05
2019-01-10 07:54:39 C 03 12 48.83 -21 29 26.8 – V T05
2019-01-10 08:00:03 C 03 12 48.69 -21 29 28.5 – V T05
2019-01-12 07:31:51 C 03 12 08.09 -21 42 49.9 – V T08
2019-01-12 07:44:33 C 03 12 07.89 -21 42 53.0 – V T08
2019-01-12 07:57:11 C 03 12 07.69 -21 42 56.4 – V T08
2019-01-12 08:09:52 C 03 12 07.49 -21 42 59.7 – V T08
2019-01-14 07:18:38 C 03 11 40.61 -21 54 21.3 – V T05
2019-01-14 07:30:02 C 03 11 40.47 -21 54 23.9 – V T05
2019-01-14 07:40:42 C 03 11 40.37 -21 54 26.2 – V T05
2019-01-14 07:52:01 C 03 11 40.24 -21 54 28.6 – V T05
2019-01-16 07:05:18 C 03 11 26.28 -22 04 06.6 – V T08
2019-01-16 07:15:57 C 03 11 26.20 -22 04 08.4 – V T08
2019-01-16 07:27:18 C 03 11 26.13 -22 04 10.3 – V T08
2019-01-16 07:38:36 C 03 11 26.06 -22 04 12.5 – V T08
2019-01-18 07:06:48 C 03 11 24.80 -22 12 17.0 – V T05
2019-01-18 07:15:25 C 03 11 24.79 -22 12 18.2 – V T05
2019-01-18 07:24:11 C 03 11 24.77 -22 12 19.5 – V T05
2019-01-18 07:32:49 C 03 11 24.76 -22 12 20.8 – V T05
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)