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
2019-07-17 21:13:58 C 15 54 23.01 +27 44 34.4 – V A16
2019-07-17 21:22:59 C 15 54 23.80 +27 44 28.5 – d Z35
2019-07-17 21:34:16 C 15 54 24.77 +27 44 16.1 – V A16
2019-07-17 21:54:40 C 15 54 26.54 +27 44 02.1 – d Z35
2019-07-17 22:03:57 C 15 54 27.30 +27 43 49.6 – V A16
2019-07-17 22:27:04 C 15 54 29.20 +27 43 32.2 – d Z35
2019-07-20 21:26:17 C 16 00 38.36 +26 40 48.7 – q 160
2019-07-20 21:29:12 C 16 00 38.59 +26 40 46.0 – q 160
2019-07-20 21:32:03 C 16 00 38.81 +26 40 43.3 – q 160
2019-07-20 22:03:14 C 16 00 41.55 +26 40 16.7 – V J27
2019-07-20 22:09:33 C 16 00 42.08 +26 40 11.1 – V J27
2019-07-20 22:16:01 C 16 00 42.58 +26 40 05.6 – V J27
2019-07-21 00:01:29 C 16 00 51.49 +26 38 28.5 – V Z80
2019-07-21 00:06:29 C 16 00 51.80 +26 38 23.5 – V Z80
2019-07-21 00:11:29 C 16 00 52.31 +26 38 20.3 – V Z80
2019-07-21 08:41:46 C 16 01 35.71 +26 30 58.7 – V T08
2019-07-21 08:47:29 C 16 01 36.17 +26 30 53.5 – V T08
2019-07-21 08:56:18 C 16 01 36.88 +26 30 45.8 – V T08
2019-07-21 08:56:57 C 16 01 36.96 +26 30 45.3 – V T08
2019-07-21 09:11:08 C 16 01 38.09 +26 30 32.4 – V T08
2019-07-21 09:11:48 C 16 01 38.15 +26 30 31.9 – V T08
2019-07-21 21:12:11 C 16 02 39.55 +26 19 52.6 – V A16
2019-07-21 21:34:48 C 16 02 41.41 +26 19 32.6 – V A16
2019-07-21 21:51:05 C 16 02 42.62 +26 19 19.0 – q 160
2019-07-21 21:54:01 C 16 02 42.87 +26 19 16.3 – q 160
2019-07-21 21:56:56 C 16 02 43.13 +26 19 14.1 – q 160
2019-07-21 22:18:20 C 16 02 44.97 +26 18 54.0 – V A16
2019-07-22 09:16:21 S 16 03 40.95 +26 09 21.4 – L C51
2019-07-22 15:33:10 S 16 04 12.51 +26 03 51.1 – L C51
2019-07-22 18:41:30 S 16 04 28.40 +26 01 06.1 – L C51
2019-07-22 21:24:21 C 16 04 41.69 +25 58 37.4 – V A16
2019-07-22 21:37:58 C 16 04 42.83 +25 58 25.0 – V A16
2019-07-22 22:14:36 C 16 04 45.78 +25 57 53.0 – V A16
2019-07-23 00:58:19 S 16 04 59.99 +25 55 35.0 – L C51
2019-07-23 07:15:08 S 16 05 31.414 +25 50 04.78 – L C51
2019-07-23 10:23:26 S 16 05 47.06 +25 47 20.4 – L C51
2019-07-23 16:40:16 S 16 06 18.49 +25 41 49.2 – L C51
2019-07-23 19:48:35 S 16 06 34.20 +25 39 05.0 – L C51
2019-07-23 21:22:50 S 16 06 42.02 +25 37 41.6 – L C51
2019-07-23 22:56:53 S 16 06 49.83 +25 36 19.7 – L C51
2019-07-23 22:57:05 S 16 06 49.84 +25 36 20.0 – L C51
2019-07-24 00:31:08 S 16 06 57.61 +25 34 57.9 – L C51
2019-07-24 02:05:24 S 16 07 05.50 +25 33 35.2 – L C51
2019-07-24 03:39:28 S 16 07 13.29 +25 32 12.1 – L C51
2019-07-24 03:39:39 S 16 07 13.31 +25 32 11.9 – L C51
2019-07-24 05:13:43 S 16 07 21.08 +25 30 50.8 – L C51
2019-07-24 06:47:57 S 16 07 28.88 +25 29 28.0 – L C51
2019-07-24 08:22:12 S 16 07 36.72 +25 28 04.8 – L C51
2019-07-24 09:56:17 S 16 07 44.39 +25 26 42.9 – L C51
2019-07-24 11:30:32 S 16 07 52.260 +25 25 21.07 – 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)