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
2020-12-23 09:14:08 S 07 00 21.403 -44 28 21.58 – V C57
2020-12-23 09:24:08 S 07 00 20.981 -44 28 46.70 – V C57
2020-12-23 09:34:08 S 07 00 20.664 -44 29 13.42 – V C57
2020-12-23 09:44:08 S 07 00 20.273 -44 29 38.33 – V C57
2020-12-23 09:54:08 S 07 00 19.906 -44 30 03.74 – V C57
2020-12-23 10:04:08 S 07 00 19.363 -44 30 29.84 – V C57
2020-12-23 10:14:08 S 07 00 19.246 -44 30 55.73 – V C57
2020-12-23 10:24:08 S 07 00 18.761 -44 31 22.37 – V C57
2020-12-23 10:34:08 S 07 00 18.286 -44 31 45.48 – V C57
2020-12-23 10:44:08 S 07 00 17.904 -44 32 11.87 – V C57
2020-12-23 10:54:08 S 07 00 17.482 -44 32 37.18 – V C57
2020-12-23 11:04:08 S 07 00 17.186 -44 33 02.45 – V C57
2020-12-23 11:14:08 S 07 00 16.740 -44 33 28.80 – V C57
2020-12-23 11:24:08 S 07 00 16.284 -44 33 54.61 – V C57
2020-12-23 11:34:08 S 07 00 15.914 -44 34 19.74 – V C57
2020-12-23 11:44:08 S 07 00 15.564 -44 34 45.44 – V C57
2020-12-23 11:54:08 S 07 00 15.276 -44 35 10.00 – V C57
2020-12-23 12:04:08 S 07 00 14.724 -44 35 36.60 – V C57
2020-12-23 12:14:08 S 07 00 14.381 -44 36 01.91 – V C57
2020-12-23 12:24:08 S 07 00 14.026 -44 36 28.12 – V C57
2020-12-23 12:34:08 S 07 00 13.726 -44 36 52.81 – V C57
2020-12-23 12:44:08 S 07 00 13.234 -44 37 17.98 – V C57
2020-12-23 12:54:08 S 07 00 12.746 -44 37 43.68 – V C57
2020-12-23 13:04:08 S 07 00 12.413 -44 38 09.74 – V C57
2020-12-23 13:14:08 S 07 00 12.043 -44 38 36.10 – V C57
2020-12-23 13:44:08 S 07 00 11.544 -44 39 57.53 – V C57
2020-12-23 14:04:08 S 07 00 09.797 -44 40 49.48 – V C57
2020-12-23 14:24:08 S 07 00 09.230 -44 41 33.29 – V C57
2020-12-23 14:34:08 S 07 00 08.971 -44 41 58.81 – V C57
2020-12-23 14:44:08 S 07 00 08.525 -44 42 24.37 – V C57
2020-12-23 14:54:08 S 07 00 08.023 -44 42 50.44 – V C57
2020-12-23 15:04:08 S 07 00 07.747 -44 43 16.72 – V C57
2020-12-23 15:14:08 S 07 00 07.289 -44 43 40.73 – V C57
2020-12-23 15:24:08 S 07 00 06.845 -44 44 07.73 – V C57
2020-12-23 15:34:08 S 07 00 06.487 -44 44 31.63 – V C57
2020-12-23 15:44:08 S 07 00 06.101 -44 44 58.24 – V C57
2020-12-23 15:44:08 s 1 -10135.127 0 +402402.91 5490.0 – C57
2020-12-23 15:54:08 S 07 00 05.688 -44 45 23.11 – V C57
2020-12-23 15:54:08 s 1 -10478.823 0 +402448.13 7810.0 – C57
2020-12-23 16:04:08 S 07 00 05.388 -44 45 48.74 – V C57
2020-12-23 16:04:08 s 1 -10822.500 0 +402492.47 40.0 – C57
2020-12-23 16:14:08 S 07 00 04.954 -44 46 13.84 – V C57
2020-12-23 16:14:08 s 1 -11166.156 0 +402535.92 2200.0 – C57
2020-12-23 16:24:08 S 07 00 04.466 -44 46 39.14 – V C57
2020-12-23 16:24:08 s 1 -11509.792 0 +402578.49 4260.0 – C57
2020-12-23 16:34:08 S 07 00 04.075 -44 47 04.38 – V C57
2020-12-23 16:34:08 s 1 -11853.407 0 +402620.18 6240.0 – C57
2020-12-23 16:44:08 S 07 00 03.691 -44 47 29.90 – V C57
2020-12-23 16:44:08 s 1 -12196.999 0 +402660.99 8140.0 – C57
2020-12-23 16:54:08 S 07 00 03.302 -44 47 56.62 – 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)