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
2021-01-16 06:04:08 s 1 +136677.39 3 +231854.70 2600.0 – C57
2021-01-16 06:14:08 S 06 26 15.878 -65 18 54.22 – V C57
2021-01-16 06:14:08 s 1 +136482.81 9 +232498.32 6330.0 – C57
2021-01-16 06:24:08 S 06 26 14.594 -65 19 14.16 – V C57
2021-01-16 06:24:08 s 1 +136287.24 7 +233140.25 8330.0 – C57
2021-01-16 06:34:08 S 06 26 13.387 -65 19 35.00 – V C57
2021-01-16 06:34:08 s 1 +136090.68 2 +233780.49 8620.0 – C57
2021-01-16 06:44:08 S 06 26 12.425 -65 19 55.13 – V C57
2021-01-16 06:44:08 s 1 +135893.13 1 +234419.06 7200.0 – C57
2021-01-16 06:54:08 S 06 26 11.491 -65 20 15.43 – V C57
2021-01-16 06:54:08 s 1 +135694.60 0 +235055.95 4100.0 – C57
2021-01-16 07:04:08 S 06 26 10.524 -65 20 37.00 – V C57
2021-01-16 07:04:08 s 1 +135495.09 5 +235691.17 9310.0 – C57
2021-01-16 07:14:08 S 06 26 09.283 -65 20 57.98 – V C57
2021-01-16 07:14:08 s 1 +135294.62 2 +236324.72 2850.0 – C57
2021-01-16 07:24:08 S 06 26 08.321 -65 21 17.75 – V C57
2021-01-16 07:24:08 s 1 +135093.18 7 +236956.61 4730.0 – C57
2021-01-16 07:34:08 S 06 26 07.212 -65 21 38.16 – V C57
2021-01-16 07:34:08 s 1 +134890.79 7 +237586.84 4960.0 – C57
2021-01-16 07:44:08 S 06 26 06.252 -65 21 59.04 – V C57
2021-01-16 07:44:08 s 1 +134687.45 7 +238215.41 3550.0 – C57
2021-01-16 07:54:08 S 06 26 05.088 -65 22 19.67 – V C57
2021-01-16 07:54:08 s 1 +134483.17 3 +238842.33 500.0 – C57
2021-01-16 08:04:08 S 06 26 03.862 -65 22 39.47 – V C57
2021-01-16 08:04:08 s 1 +134277.95 1 +239467.60 5840.0 – C57
2021-01-16 08:14:08 S 06 26 02.894 -65 23 00.78 – V C57
2021-01-16 08:14:08 s 1 +134071.79 7 +240091.22 9570.0 – C57
2021-01-16 08:24:08 S 06 26 02.100 -65 23 20.80 – V C57
2021-01-16 08:24:08 s 1 +133864.71 6 +240713.21 1690.0 – C57
2021-01-16 08:34:08 S 06 26 00.960 -65 23 41.17 – V C57
2021-01-16 08:34:08 s 1 +133656.71 5 +241333.55 2230.0 – C57
2021-01-16 08:44:08 S 06 25 59.719 -65 24 01.51 – V C57
2021-01-16 08:44:08 s 1 +133447.79 9 +241952.26 1180.0 – C57
2021-01-16 08:54:08 S 06 25 58.673 -65 24 21.89 – V C57
2021-01-16 08:54:08 s 1 +133237.97 4 +242569.33 8570.0 – C57
2021-01-16 09:04:08 S 06 25 57.828 -65 24 43.27 – V C57
2021-01-16 09:04:08 s 1 +133027.24 5 +243184.78 4390.0 – C57
2021-01-16 09:14:08 S 06 25 56.705 -65 25 03.72 – V C57
2021-01-16 09:14:08 s 1 +132815.61 9 +243798.61 8650.0 – C57
2021-01-16 09:24:08 S 06 25 55.670 -65 25 22.94 – V C57
2021-01-16 09:24:08 s 1 +132603.09 9 +244410.81 1380.0 – C57
2021-01-16 09:34:08 S 06 25 54.478 -65 25 43.75 – V C57
2021-01-16 09:34:08 s 1 +132389.69 3 +245021.40 2570.0 – C57
2021-01-16 09:44:08 S 06 25 53.520 -65 26 04.27 – V C57
2021-01-16 09:44:08 s 1 +132175.40 5 +245630.37 2240.0 – C57
2021-01-16 09:54:08 S 06 25 52.627 -65 26 26.12 – V C57
2021-01-16 09:54:08 s 1 +131960.24 0 +246237.73 390.0 – C57
2021-01-16 10:04:08 S 06 25 51.367 -65 26 45.02 – V C57
2021-01-16 10:04:08 s 1 +131744.20 5 +246843.48 7030.0 – C57
2021-01-16 10:14:08 S 06 25 50.160 -65 27 04.61 – V C57
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)