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
2021-01-09 22:34:08 s 1 -164797.71 2 +309751.06 5030.0 – C57
2021-01-09 22:44:08 S 06 37 20.362 -60 31 00.12 – V C57
2021-01-09 22:44:08 s 1 -165011.28 0 +309337.95 10.0 – C57
2021-01-09 22:54:08 S 06 37 19.517 -60 31 20.24 – V C57
2021-01-09 22:54:08 s 1 -165224.30 3 +308923.84 4120.0 – C57
2021-01-09 23:04:08 S 06 37 18.766 -60 31 38.86 – V C57
2021-01-09 23:04:08 s 1 -165436.77 6 +308508.73 7360.0 – C57
2021-01-09 23:14:08 S 06 37 17.748 -60 31 58.91 – V C57
2021-01-09 23:14:08 s 1 -165648.69 9 +308092.60 9730.0 – C57
2021-01-09 23:24:08 S 06 37 16.918 -60 32 17.16 – V C57
2021-01-09 23:24:08 s 1 -165860.07 0 +307675.48 1220.0 – C57
2021-01-09 23:34:08 S 06 37 15.962 -60 32 36.64 – V C57
2021-01-09 23:34:08 s 1 -166070.88 6 +307257.34 1830.0 – C57
2021-01-09 23:44:08 S 06 37 15.065 -60 32 56.04 – V C57
2021-01-09 23:44:08 s 1 -166281.14 7 +306838.19 1550.0 – C57
2021-01-09 23:54:08 S 06 37 14.119 -60 33 16.06 – V C57
2021-01-09 23:54:08 s 1 -166490.84 9 +306418.04 380.0 – C57
2021-01-10 00:04:08 S 06 37 13.289 -60 33 35.10 – V C57
2021-01-10 00:04:08 s 1 -166699.99 1 +305996.87 8330.0 – C57
2021-01-10 00:14:08 S 06 37 12.468 -60 33 53.82 – V C57
2021-01-10 00:14:08 s 1 -166908.57 0 +305574.69 5370.0 – C57
2021-01-10 00:24:08 S 06 37 11.465 -60 34 13.73 – V C57
2021-01-10 00:24:08 s 1 -167116.58 6 +305151.50 1520.0 – C57
2021-01-10 00:34:08 S 06 37 10.613 -60 34 32.84 – V C57
2021-01-10 00:34:08 s 1 -167324.03 6 +304727.30 6770.0 – C57
2021-01-10 00:44:08 S 06 37 09.799 -60 34 52.54 – V C57
2021-01-10 00:44:08 s 1 -167530.91 7 +304302.08 1110.0 – C57
2021-01-10 00:54:08 S 06 37 08.837 -60 35 11.65 – V C57
2021-01-10 00:54:08 s 1 -167737.22 9 +303875.85 4540.0 – C57
2021-01-10 01:04:08 S 06 37 07.894 -60 35 30.52 – V C57
2021-01-10 01:04:08 s 1 -167942.96 8 +303448.60 7070.0 – C57
2021-01-10 01:14:08 S 06 37 07.186 -60 35 49.70 – V C57
2021-01-10 01:14:08 s 1 -168148.13 3 +303020.33 8670.0 – C57
2021-01-10 01:24:08 S 06 37 06.209 -60 36 09.68 – V C57
2021-01-10 01:24:08 s 1 -168352.72 2 +302591.05 9360.0 – C57
2021-01-10 01:34:08 S 06 37 05.237 -60 36 28.94 – V C57
2021-01-10 01:34:08 s 1 -168556.73 3 +302160.74 9120.0 – C57
2021-01-10 01:54:08 S 06 37 03.593 -60 37 06.46 – V C57
2021-01-10 01:54:08 s 1 -168963.01 3 +301297.07 5870.0 – C57
2021-01-10 02:04:08 S 06 37 02.604 -60 37 27.44 – V C57
2021-01-10 02:04:08 s 1 -169165.27 7 +300863.70 2850.0 – C57
2021-01-10 02:14:08 S 06 37 01.723 -60 37 45.59 – V C57
2021-01-10 02:14:08 s 1 -169366.95 5 +300429.31 8890.0 – C57
2021-01-10 02:24:08 S 06 37 00.893 -60 38 04.20 – V C57
2021-01-10 02:24:08 s 1 -169568.04 4 +299993.90 3990.0 – C57
2021-01-10 02:34:08 S 06 36 59.894 -60 38 23.78 – V C57
2021-01-10 02:34:08 s 1 -169768.54 3 +299557.45 8150.0 – C57
2021-01-10 02:44:08 S 06 36 58.908 -60 38 43.08 – V C57
2021-01-10 02:44:08 s 1 -169968.44 9 +299119.99 1360.0 – C57
2021-01-10 02:54:08 S 06 36 58.178 -60 39 02.45 – 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)