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
2020-12-21 06:04:08 s 1 +103863.00 8 +330494.06 5260.0 – C57
2020-12-21 06:14:08 S 07 02 07.603 -42 15 28.30 – V C57
2020-12-21 06:14:08 s 1 +103568.93 1 +330877.65 5410.0 – C57
2020-12-21 06:24:08 S 07 02 07.219 -42 15 58.00 – V C57
2020-12-21 06:24:08 s 1 +103274.49 1 +331260.11 5170.0 – C57
2020-12-21 06:34:08 S 07 02 06.602 -42 16 24.06 – V C57
2020-12-21 06:34:08 s 1 +102979.68 9 +331641.44 4530.0 – C57
2020-12-21 06:44:08 S 07 02 06.917 -42 16 48.94 – V C57
2020-12-21 06:44:08 s 1 +102684.52 7 +332021.63 3510.0 – C57
2020-12-21 06:54:08 S 07 02 06.427 -42 17 16.94 – V C57
2020-12-21 06:54:08 s 1 +102389.00 6 +332400.69 2110.0 – C57
2020-12-21 07:04:08 S 07 02 06.029 -42 17 42.40 – V C57
2020-12-21 07:04:08 s 1 +102093.13 0 +332778.62 320.0 – C57
2020-12-21 07:14:08 S 07 02 05.688 -42 18 09.04 – V C57
2020-12-21 07:14:08 s 1 +101796.89 9 +333155.42 8160.0 – C57
2020-12-21 07:24:08 S 07 02 05.405 -42 18 34.78 – V C57
2020-12-21 07:24:08 s 1 +101500.31 5 +333531.09 5610.0 – C57
2020-12-21 07:34:08 S 07 02 05.177 -42 19 00.66 – V C57
2020-12-21 07:34:08 s 1 +101203.38 0 +333905.64 2690.0 – C57
2020-12-21 07:44:08 S 07 02 04.826 -42 19 26.69 – V C57
2020-12-21 07:44:08 s 1 +100906.09 6 +334279.06 9400.0 – C57
2020-12-21 07:54:08 S 07 02 04.493 -42 19 54.41 – V C57
2020-12-21 07:54:08 s 1 +100608.46 5 +334651.36 5730.0 – C57
2020-12-21 08:04:08 S 07 02 04.135 -42 20 20.62 – V C57
2020-12-21 08:04:08 s 1 +100310.48 8 +335022.54 1700.0 – C57
2020-12-21 08:14:08 S 07 02 03.907 -42 20 47.90 – V C57
2020-12-21 08:14:08 s 1 +100012.16 7 +335392.60 7300.0 – C57
2020-12-21 08:24:08 S 07 02 03.610 -42 21 13.46 – V C57
2020-12-21 08:24:08 s 1 +99713.505 0 +335761.54 2530.0 – C57
2020-12-21 08:34:08 S 07 02 03.408 -42 21 40.00 – V C57
2020-12-21 08:34:08 s 1 +99414.502 0 +336129.36 7400.0 – C57
2020-12-21 08:44:08 S 07 02 03.029 -42 22 07.00 – V C57
2020-12-21 08:44:08 s 1 +99115.162 0 +336496.07 1910.0 – C57
2020-12-21 08:54:08 S 07 02 02.654 -42 22 32.45 – V C57
2020-12-21 08:54:08 s 1 +98815.484 0 +336861.65 6060.0 – C57
2020-12-21 09:04:08 S 07 02 02.232 -42 22 59.45 – V C57
2020-12-21 09:04:08 s 1 +98515.471 0 +337226.13 9860.0 – C57
2020-12-21 09:14:08 S 07 02 02.184 -42 23 25.40 – V C57
2020-12-21 09:14:08 s 1 +98215.126 0 +337589.49 3300.0 – C57
2020-12-21 09:24:08 S 07 02 01.855 -42 23 52.30 – V C57
2020-12-21 09:24:08 s 1 +97914.448 0 +337951.74 6390.0 – C57
2020-12-21 09:34:08 S 07 02 01.442 -42 24 19.69 – V C57
2020-12-21 09:34:08 s 1 +97613.441 0 +338312.89 9120.0 – C57
2020-12-21 09:44:08 S 07 02 01.109 -42 24 46.48 – V C57
2020-12-21 09:44:08 s 1 +97312.107 0 +338672.92 1510.0 – C57
2020-12-21 09:54:08 S 07 02 00.821 -42 25 11.60 – V C57
2020-12-21 09:54:08 s 1 +97010.445 0 +339031.84 3560.0 – C57
2020-12-21 10:04:08 S 07 02 00.502 -42 25 37.52 – V C57
2020-12-21 10:04:08 s 1 +96708.459 0 +339389.66 5250.0 – C57
2020-12-21 10:14:08 S 07 02 00.353 -42 26 05.39 – 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)