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
2021-01-13 01:34:08 s 1 -140655.07 9 + 3391.524 7790.0 – C57
2021-01-14 07:44:08 S 06 30 04.147 -63 39 43.31 – V C57
2021-01-14 07:44:08 s 1 +95898.198 0 -25417.757 6240.0 – C57
2021-01-14 08:24:08 S 06 30 02.777 -63 41 08.05 – V C57
2021-01-14 08:24:08 s 1 +99681.643 0 -20874.435 2770.0 – C57
2021-01-14 08:54:08 S 06 30 01.498 -63 42 13.90 – V C57
2021-01-14 08:54:08 s 1 +102382.37 1 -17437.688 1170.0 – C57
2021-01-14 09:04:08 S 06 30 01.006 -63 42 34.96 – V C57
2021-01-14 09:04:08 s 1 +103257.28 2 -16287.589 3990.0 – C57
2021-01-14 09:14:08 S 06 30 00.706 -63 42 58.14 – V C57
2021-01-14 09:14:08 s 1 +104119.76 0 -15135.537 5560.0 – C57
2021-01-14 09:24:08 S 06 30 00.094 -63 43 19.88 – V C57
2021-01-14 09:24:08 s 1 +104969.94 4 -13981.706 6110.0 – C57
2021-01-14 09:34:08 S 06 29 59.784 -63 43 39.97 – V C57
2021-01-14 09:34:08 s 1 +105807.97 3 -12826.265 5890.0 – C57
2021-01-14 09:54:08 S 06 29 58.644 -63 44 23.03 – V C57
2021-01-14 09:54:08 s 1 +107448.12 4 -10511.195 4060.0 – C57
2021-01-14 10:04:08 S 06 29 58.409 -63 44 45.89 – V C57
2021-01-14 10:04:08 s 1 +108250.52 3 - 9351.875 2930.0 – C57
2021-01-14 10:14:08 S 06 29 57.816 -63 45 08.10 – V C57
2021-01-14 10:14:08 s 1 +109041.32 2 - 8191.562 1970.0 – C57
2021-01-14 10:24:08 S 06 29 57.331 -63 45 28.76 – V C57
2021-01-14 10:24:08 s 1 +109820.65 9 - 7030.395 1430.0 – C57
2021-01-14 10:34:08 S 06 29 56.945 -63 45 52.52 – V C57
2021-01-14 10:34:08 s 1 +110588.67 0 - 5868.513 1520.0 – C57
2021-01-14 10:44:08 S 06 29 56.518 -63 46 12.54 – V C57
2021-01-14 10:44:08 s 1 +111345.49 0 - 4706.045 2490.0 – C57
2021-01-14 11:04:08 S 06 29 55.543 -63 46 57.18 – V C57
2021-01-14 11:04:08 s 1 +112826.09 9 - 2379.855 7980.0 – C57
2021-01-14 11:14:08 S 06 29 54.509 -63 47 17.81 – V C57
2021-01-14 11:14:08 s 1 +113550.15 5 - 1216.373 2960.0 – C57
2021-01-14 11:24:08 S 06 29 54.415 -63 47 40.16 – V C57
2021-01-14 11:24:08 s 1 +114263.55 4 - 52.785 9720.0 – C57
2021-01-14 11:34:08 S 06 29 53.844 -63 48 02.59 – V C57
2021-01-14 11:34:08 s 1 +114966.42 8 + 1110.800 8500.0 – C57
2021-01-14 11:44:08 S 06 29 53.438 -63 48 23.47 – V C57
2021-01-14 11:44:08 s 1 +115658.90 6 + 2274.275 9510.0 – C57
2021-01-14 11:54:08 S 06 29 52.776 -63 48 46.73 – V C57
2021-01-14 11:54:08 s 1 +116341.11 6 + 3437.539 2980.0 – C57
2021-01-14 12:14:08 S 06 29 51.893 -63 49 28.56 – V C57
2021-01-14 12:14:08 s 1 +117675.24 0 + 5763.050 8150.0 – C57
2021-01-14 12:24:08 S 06 29 51.043 -63 49 51.78 – V C57
2021-01-14 12:24:08 s 1 +118327.40 5 + 6925.112 280.0 – C57
2021-01-14 12:34:08 S 06 29 50.650 -63 50 12.41 – V C57
2021-01-14 12:34:08 s 1 +118969.80 3 + 8086.594 5720.0 – C57
2021-01-14 12:44:08 S 06 29 50.294 -63 50 35.02 – V C57
2021-01-14 12:44:08 s 1 +119602.55 5 + 9247.411 4690.0 – C57
2021-01-14 12:54:08 S 06 29 49.764 -63 50 56.83 – V C57
2021-01-14 12:54:08 s 1 +120225.78 3 +10407.484 7380.0 – C57
2021-01-14 13:04:08 S 06 29 49.082 -63 51 18.97 – 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)