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
2021-01-07 19:34:08 s 1 -80791.523 0 +392181.62 6880.0 – C57
2021-01-07 19:44:08 S 06 41 45.314 -58 48 22.46 – V C57
2021-01-07 19:44:08 s 1 -81108.829 0 +392047.98 1480.0 – C57
2021-01-07 19:54:08 S 06 41 44.448 -58 48 42.91 – V C57
2021-01-07 19:54:08 s 1 -81425.950 0 +391913.47 5810.0 – C57
2021-01-07 20:04:08 S 06 41 43.747 -58 49 03.43 – V C57
2021-01-07 20:04:08 s 1 -81742.884 0 +391778.09 9860.0 – C57
2021-01-07 20:14:08 S 06 41 42.706 -58 49 24.24 – V C57
2021-01-07 20:14:08 s 1 -82059.630 0 +391641.86 3630.0 – C57
2021-01-07 20:24:08 S 06 41 41.914 -58 49 45.59 – V C57
2021-01-07 20:24:08 s 1 -82376.187 0 +391504.76 7130.0 – C57
2021-01-07 20:34:08 S 06 41 41.268 -58 50 06.04 – V C57
2021-01-07 20:34:08 s 1 -82692.555 0 +391366.80 340.0 – C57
2021-01-07 20:44:08 S 06 41 40.241 -58 50 26.81 – V C57
2021-01-07 20:44:08 s 1 -83008.733 0 +391227.98 3280.0 – C57
2021-01-07 20:54:08 S 06 41 39.550 -58 50 47.69 – V C57
2021-01-07 20:54:08 s 1 -83324.720 0 +391088.29 5930.0 – C57
2021-01-07 21:04:08 S 06 41 38.585 -58 51 09.54 – V C57
2021-01-07 21:04:08 s 1 -83640.515 0 +390947.74 8300.0 – C57
2021-01-07 21:14:08 S 06 41 37.745 -58 51 29.59 – V C57
2021-01-07 21:14:08 s 1 -83956.118 0 +390806.33 390.0 – C57
2021-01-07 21:24:08 S 06 41 36.934 -58 51 50.15 – V C57
2021-01-07 21:24:08 s 1 -84271.527 0 +390664.05 2180.0 – C57
2021-01-07 21:34:08 S 06 41 36.204 -58 52 10.38 – V C57
2021-01-07 21:34:08 s 1 -84586.743 0 +390520.91 3700.0 – C57
2021-01-07 21:44:08 S 06 41 35.364 -58 52 31.51 – V C57
2021-01-07 21:44:08 s 1 -84901.763 0 +390376.91 4920.0 – C57
2021-01-07 21:54:08 S 06 41 34.358 -58 52 52.00 – V C57
2021-01-07 21:54:08 s 1 -85216.588 0 +390232.04 5850.0 – C57
2021-01-07 22:04:08 S 06 41 33.799 -58 53 12.84 – V C57
2021-01-07 22:04:08 s 1 -85531.216 0 +390086.31 6500.0 – C57
2021-01-07 22:14:08 S 06 41 32.827 -58 53 34.33 – V C57
2021-01-07 22:14:08 s 1 -85845.646 0 +389939.71 6850.0 – C57
2021-01-07 22:24:08 S 06 41 31.834 -58 53 55.32 – V C57
2021-01-07 22:24:08 s 1 -86159.879 0 +389792.25 6910.0 – C57
2021-01-07 22:34:08 S 06 41 30.931 -58 54 15.88 – V C57
2021-01-07 22:34:08 s 1 -86473.912 0 +389643.92 6670.0 – C57
2021-01-07 22:44:08 S 06 41 30.406 -58 54 35.78 – V C57
2021-01-07 22:44:08 s 1 -86787.746 0 +389494.73 6140.0 – C57
2021-01-07 22:54:08 S 06 41 29.314 -58 54 57.64 – V C57
2021-01-07 22:54:08 s 1 -87101.379 0 +389344.68 5310.0 – C57
2021-01-07 23:04:08 S 06 41 28.524 -58 55 18.12 – V C57
2021-01-07 23:04:08 s 1 -87414.811 0 +389193.76 4180.0 – C57
2021-01-07 23:14:08 S 06 41 27.840 -58 55 37.49 – V C57
2021-01-07 23:14:08 s 1 -87728.041 0 +389041.97 2750.0 – C57
2021-01-07 23:24:08 S 06 41 26.868 -58 55 59.05 – V C57
2021-01-07 23:24:08 s 1 -88041.067 0 +388889.32 1020.0 – C57
2021-01-07 23:34:08 S 06 41 25.920 -58 56 20.36 – V C57
2021-01-07 23:34:08 s 1 -88353.890 0 +388735.81 9000.0 – C57
2021-01-07 23:44:08 S 06 41 25.231 -58 56 40.38 – 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)