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
2021-01-26 09:34:07 S 05 51 58.894 -72 14 27.02 – V C57
2021-01-26 09:34:07 s 1 -135982.35 9 -11724.180 6390.0 – C57
2021-01-27 22:22:56 C 05 46 56.20 -73 15 33.7 – o K95
2021-01-27 23:20:50 C 05 46 44.51 -73 17 06.3 – o K95
2021-01-27 23:22:11 C 05 46 44.16 -73 17 11.4 – o K95
2021-01-28 01:44:07 S 05 48 01.651 -73 22 56.93 – V C57
2021-01-28 01:44:07 s 1 +138237.93 0 +41267.900 8120.0 – C57
2021-01-28 01:54:07 S 05 47 59.830 -73 23 19.00 – V C57
2021-01-28 01:54:07 s 1 +138618.28 7 +42364.180 7070.0 – C57
2021-01-28 02:04:07 S 05 47 58.253 -73 23 39.44 – V C57
2021-01-28 02:04:07 s 1 +138992.39 8 +43458.544 4660.0 – C57
2021-01-28 02:14:07 S 05 47 56.678 -73 23 58.02 – V C57
2021-01-28 02:14:07 s 1 +139360.33 2 +44550.970 1020.0 – C57
2021-01-28 02:24:07 S 05 47 54.878 -73 24 16.02 – V C57
2021-01-28 02:24:07 s 1 +139722.15 8 +45641.437 6270.0 – C57
2021-01-28 02:34:07 S 05 47 53.311 -73 24 36.83 – V C57
2021-01-28 02:34:07 s 1 +140077.94 3 +46729.923 530.0 – C57
2021-01-28 02:44:07 S 05 47 51.367 -73 24 56.63 – V C57
2021-01-28 02:44:07 s 1 +140427.75 5 +47816.411 3920.0 – C57
2021-01-28 02:54:07 S 05 47 49.918 -73 25 15.35 – V C57
2021-01-28 02:54:07 s 1 +140771.65 8 +48900.880 6570.0 – C57
2021-01-28 03:04:07 S 05 47 48.554 -73 25 35.29 – V C57
2021-01-28 03:04:07 s 1 +141109.71 9 +49983.312 8590.0 – C57
2021-01-28 03:14:07 S 05 47 46.466 -73 25 55.81 – V C57
2021-01-28 03:14:07 s 1 +141442.00 0 +51063.691 90.0 – C57
2021-01-28 03:24:07 S 05 47 44.767 -73 26 14.32 – V C57
2021-01-28 03:24:07 s 1 +141768.56 6 +52142.000 1200.0 – C57
2021-01-28 03:34:07 S 05 47 43.157 -73 26 34.98 – V C57
2021-01-28 03:34:07 s 1 +142089.47 8 +53218.223 2010.0 – C57
2021-01-28 03:44:07 S 05 47 41.592 -73 26 53.77 – V C57
2021-01-28 03:44:07 s 1 +142404.79 8 +54292.344 2650.0 – C57
2021-01-28 03:54:07 S 05 47 39.866 -73 27 12.20 – V C57
2021-01-28 03:54:07 s 1 +142714.58 7 +55364.351 3220.0 – C57
2021-01-28 04:14:07 S 05 47 37.315 -73 27 49.43 – V C57
2021-01-28 04:14:07 s 1 +143317.80 9 +57501.962 4590.0 – C57
2021-01-28 05:14:07 S 05 47 26.172 -73 29 50.50 – V C57
2021-01-28 05:14:07 s 1 +145000.78 3 +63862.720 8020.0 – C57
2021-01-28 05:24:07 S 05 47 24.293 -73 30 10.48 – V C57
2021-01-28 05:24:07 s 1 +145263.38 8 +64915.139 2680.0 – C57
2021-01-28 05:34:07 S 05 47 22.598 -73 30 29.70 – V C57
2021-01-28 05:34:07 s 1 +145521.02 4 +65965.332 8280.0 – C57
2021-01-28 05:44:07 S 05 47 21.022 -73 30 48.46 – V C57
2021-01-28 05:44:07 s 1 +145773.74 4 +67013.291 4930.0 – C57
2021-01-28 05:54:07 S 05 47 19.018 -73 31 09.05 – V C57
2021-01-28 05:54:07 s 1 +146021.60 1 +68059.006 2720.0 – C57
2021-01-28 06:04:07 S 05 47 17.477 -73 31 29.50 – V C57
2021-01-28 06:04:07 s 1 +146264.64 3 +69102.471 1730.0 – C57
2021-01-28 06:14:07 S 05 47 15.406 -73 31 47.21 – V C57
2021-01-28 06:14:07 s 1 +146502.92 2 +70143.679 2070.0 – C57
2021-01-28 06:24:07 S 05 47 13.901 -73 32 07.40 – 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)