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
2021-01-23 11:34:07 S 06 02 34.932 -70 32 00.71 – V C57
2021-01-23 11:34:07 s 1 -177907.39 7 +285886.79 3070.0 – C57
2021-01-23 11:44:07 S 06 02 33.202 -70 32 17.30 – V C57
2021-01-23 11:44:07 s 1 -178100.32 5 +285430.38 430.0 – C57
2021-01-23 11:54:08 S 06 02 31.594 -70 32 32.75 – V C57
2021-01-23 11:54:08 s 1 -178292.58 9 +284972.92 6640.0 – C57
2021-01-23 12:04:07 S 06 02 29.801 -70 32 48.59 – V C57
2021-01-23 12:04:07 s 1 -178484.18 9 +284514.39 1710.0 – C57
2021-01-23 12:14:08 S 06 02 28.514 -70 33 03.60 – V C57
2021-01-23 12:14:08 s 1 -178675.12 0 +284054.80 5630.0 – C57
2021-01-23 12:24:07 S 06 02 26.988 -70 33 19.94 – V C57
2021-01-23 12:24:07 s 1 -178865.38 1 +283594.14 8390.0 – C57
2021-01-23 12:34:07 S 06 02 25.524 -70 33 35.57 – V C57
2021-01-23 12:34:07 s 1 -179054.97 0 +283132.42 9990.0 – C57
2021-01-23 12:44:07 S 06 02 23.698 -70 33 50.94 – V C57
2021-01-23 12:44:07 s 1 -179243.88 3 +282669.63 420.0 – C57
2021-01-23 12:54:07 S 06 02 22.015 -70 34 06.42 – V C57
2021-01-23 12:54:07 s 1 -179432.11 8 +282205.77 9690.0 – C57
2021-01-23 13:04:07 S 06 02 20.527 -70 34 23.16 – V C57
2021-01-23 13:04:07 s 1 -179619.67 4 +281740.84 7780.0 – C57
2021-01-23 13:14:07 S 06 02 18.734 -70 34 37.52 – V C57
2021-01-23 13:14:07 s 1 -179806.54 6 +281274.85 4690.0 – C57
2021-01-23 13:24:08 S 06 02 17.431 -70 34 53.51 – V C57
2021-01-23 13:24:08 s 1 -179992.73 4 +280807.78 430.0 – C57
2021-01-23 13:34:07 S 06 02 15.850 -70 35 08.88 – V C57
2021-01-23 13:34:07 s 1 -180178.23 4 +280339.64 4970.0 – C57
2021-01-23 13:44:08 S 06 02 14.153 -70 35 25.66 – V C57
2021-01-23 13:44:08 s 1 -180363.04 3 +279870.43 8320.0 – C57
2021-01-23 13:54:07 S 06 02 12.600 -70 35 41.53 – V C57
2021-01-23 13:54:07 s 1 -180547.16 0 +279400.15 480.0 – C57
2021-01-23 14:04:07 S 06 02 10.922 -70 35 56.18 – V C57
2021-01-23 14:04:07 s 1 -180730.58 2 +278928.79 1430.0 – C57
2021-01-23 14:14:07 S 06 02 09.163 -70 36 11.81 – V C57
2021-01-23 14:14:07 s 1 -180913.30 6 +278456.36 1180.0 – C57
2021-01-23 14:24:07 S 06 02 07.538 -70 36 28.01 – V C57
2021-01-23 14:24:07 s 1 -181095.33 0 +277982.85 9720.0 – C57
2021-01-23 14:34:07 S 06 02 06.103 -70 36 42.70 – V C57
2021-01-23 14:34:07 s 1 -181276.65 1 +277508.27 7050.0 – C57
2021-01-23 14:44:07 S 06 02 04.334 -70 37 01.24 – V C57
2021-01-23 14:44:07 s 1 -181457.26 6 +277032.60 3160.0 – C57
2021-01-23 14:54:08 S 06 02 02.882 -70 37 15.42 – V C57
2021-01-23 14:54:08 s 1 -181637.17 3 +276555.86 8040.0 – C57
2021-01-23 15:04:07 S 06 02 01.666 -70 37 27.59 – V C57
2021-01-23 15:04:07 s 1 -181816.36 9 +276078.03 1700.0 – C57
2021-01-23 15:14:07 S 06 01 59.880 -70 37 44.69 – V C57
2021-01-23 15:14:07 s 1 -181994.85 2 +275599.13 4130.0 – C57
2021-01-23 15:24:07 S 06 01 58.183 -70 38 01.10 – V C57
2021-01-23 15:24:07 s 1 -182172.61 9 +275119.14 5310.0 – C57
2021-01-23 15:34:07 S 06 01 56.585 -70 38 17.38 – V C57
2021-01-23 15:34:07 s 1 -182349.66 8 +274638.07 5260.0 – 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)