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
2021-01-18 02:24:08 s 1 +62699.707 0 +352512.95 5120.0 – C57
2021-01-18 02:34:08 S 06 21 09.600 -66 46 52.10 – V C57
2021-01-18 02:34:08 s 1 +62370.808 0 +352800.58 3900.0 – C57
2021-01-18 02:44:08 S 06 21 08.222 -66 47 11.54 – V C57
2021-01-18 02:44:08 s 1 +62041.701 0 +353087.11 2300.0 – C57
2021-01-18 02:54:08 S 06 21 06.926 -66 47 29.65 – V C57
2021-01-18 02:54:08 s 1 +61712.390 0 +353372.54 320.0 – C57
2021-01-18 03:04:08 S 06 21 05.669 -66 47 47.40 – V C57
2021-01-18 03:04:08 s 1 +61382.874 0 +353656.87 7980.0 – C57
2021-01-18 03:14:08 S 06 21 04.565 -66 48 07.27 – V C57
2021-01-18 03:14:08 s 1 +61053.156 0 +353940.10 5270.0 – C57
2021-01-18 03:24:08 S 06 21 03.566 -66 48 27.04 – V C57
2021-01-18 03:24:08 s 1 +60723.237 0 +354222.24 2200.0 – C57
2021-01-18 03:34:08 S 06 21 02.148 -66 48 45.86 – V C57
2021-01-18 03:34:08 s 1 +60393.118 0 +354503.28 8760.0 – C57
2021-01-18 03:44:08 S 06 21 00.898 -66 49 05.16 – V C57
2021-01-18 03:44:08 s 1 +60062.800 0 +354783.22 4970.0 – C57
2021-01-18 03:54:08 S 06 20 59.546 -66 49 24.42 – V C57
2021-01-18 03:54:08 s 1 +59732.286 0 +355062.08 810.0 – C57
2021-01-18 04:04:08 S 06 20 58.207 -66 49 43.25 – V C57
2021-01-18 04:04:08 s 1 +59401.575 0 +355339.84 6300.0 – C57
2021-01-18 04:14:08 S 06 20 57.204 -66 50 02.58 – V C57
2021-01-18 04:14:08 s 1 +59070.670 0 +355616.51 1440.0 – C57
2021-01-18 04:24:08 S 06 20 56.011 -66 50 22.31 – V C57
2021-01-18 04:24:08 s 1 +58739.573 0 +355892.10 6230.0 – C57
2021-01-18 04:34:08 S 06 20 54.648 -66 50 41.06 – V C57
2021-01-18 04:34:08 s 1 +58408.283 0 +356166.59 670.0 – C57
2021-01-18 04:44:08 S 06 20 53.374 -66 51 01.19 – V C57
2021-01-18 04:44:08 s 1 +58076.803 0 +356440.00 4760.0 – C57
2021-01-18 04:54:08 S 06 20 51.823 -66 51 18.07 – V C57
2021-01-18 04:54:08 s 1 +57745.134 0 +356712.32 8510.0 – C57
2021-01-18 05:04:08 S 06 20 50.686 -66 51 38.38 – V C57
2021-01-18 05:04:08 s 1 +57413.277 0 +356983.56 1910.0 – C57
2021-01-18 05:14:08 S 06 20 49.622 -66 51 58.21 – V C57
2021-01-18 05:14:08 s 1 +57081.233 0 +357253.71 4980.0 – C57
2021-01-18 05:24:08 S 06 20 48.247 -66 52 16.00 – V C57
2021-01-18 05:24:08 s 1 +56749.005 0 +357522.78 7710.0 – C57
2021-01-18 05:34:08 S 06 20 46.870 -66 52 36.08 – V C57
2021-01-18 05:34:08 s 1 +56416.593 0 +357790.77 100.0 – C57
2021-01-18 05:44:08 S 06 20 45.550 -66 52 54.55 – V C57
2021-01-18 05:44:08 s 1 +56083.998 0 +358057.67 2170.0 – C57
2021-01-18 05:54:08 S 06 20 44.479 -66 53 13.56 – V C57
2021-01-18 05:54:08 s 1 +55751.222 0 +358323.50 3900.0 – C57
2021-01-18 06:04:08 S 06 20 43.435 -66 53 33.79 – V C57
2021-01-18 06:04:08 s 1 +55418.266 0 +358588.25 5300.0 – C57
2021-01-18 06:14:08 S 06 20 42.024 -66 53 51.97 – V C57
2021-01-18 06:14:08 s 1 +55085.131 0 +358851.92 6380.0 – C57
2021-01-18 06:24:08 S 06 20 40.620 -66 54 10.84 – V C57
2021-01-18 06:24:08 s 1 +54751.820 0 +359114.52 7130.0 – C57
2021-01-18 06:34:08 S 06 20 39.432 -66 54 29.12 – 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)