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
2020-12-19 09:44:08 s 1 +160292.13 1 +182124.00 1720.0 – C57
2020-12-19 09:54:08 S 07 03 13.447 -40 16 30.25 – V C57
2020-12-19 09:54:08 s 1 +160212.02 0 +182884.08 6670.0 – C57
2020-12-19 10:04:08 S 07 03 13.234 -40 16 57.14 – V C57
2020-12-19 10:04:08 s 1 +160130.31 5 +183642.35 9750.0 – C57
2020-12-19 10:14:08 S 07 03 13.104 -40 17 23.64 – V C57
2020-12-19 10:14:08 s 1 +160047.02 8 +184398.82 960.0 – C57
2020-12-19 10:24:08 S 07 03 12.838 -40 17 52.08 – V C57
2020-12-19 10:24:08 s 1 +159962.17 0 +185153.49 320.0 – C57
2020-12-19 10:34:08 S 07 03 12.761 -40 18 19.48 – V C57
2020-12-19 10:34:08 s 1 +159875.75 0 +185906.35 7840.0 – C57
2020-12-19 10:44:08 S 07 03 12.655 -40 18 44.06 – V C57
2020-12-19 10:44:08 s 1 +159787.77 9 +186657.43 3540.0 – C57
2020-12-19 10:54:08 S 07 03 12.413 -40 19 13.15 – V C57
2020-12-19 10:54:08 s 1 +159698.26 9 +187406.71 7420.0 – C57
2020-12-19 11:04:08 S 07 03 12.151 -40 19 40.87 – V C57
2020-12-19 11:04:08 s 1 +159607.22 8 +188154.21 9510.0 – C57
2020-12-19 11:14:08 S 07 03 11.923 -40 20 07.51 – V C57
2020-12-19 11:14:08 s 1 +159514.66 7 +188899.92 9800.0 – C57
2020-12-19 11:24:08 S 07 03 11.741 -40 20 33.83 – V C57
2020-12-19 11:24:08 s 1 +159420.59 7 +189643.85 8330.0 – C57
2020-12-19 12:24:08 S 07 03 10.709 -40 23 15.36 – V C57
2020-12-19 12:24:08 s 1 +158825.02 9 +194070.33 2890.0 – C57
2020-12-19 12:34:08 S 07 03 10.598 -40 23 44.63 – V C57
2020-12-19 12:34:08 s 1 +158720.66 7 +194801.92 9330.0 – C57
2020-12-19 12:44:08 S 07 03 10.327 -40 24 10.87 – V C57
2020-12-19 12:44:08 s 1 +158614.87 3 +195531.77 4090.0 – C57
2020-12-19 12:54:08 S 07 03 10.157 -40 24 39.17 – V C57
2020-12-19 12:54:08 s 1 +158507.65 7 +196259.87 7180.0 – C57
2020-12-19 13:04:08 S 07 03 09.962 -40 25 05.52 – V C57
2020-12-19 13:04:08 s 1 +158399.02 7 +196986.23 8620.0 – C57
2020-12-19 13:14:08 S 07 03 09.713 -40 25 33.89 – V C57
2020-12-19 13:14:08 s 1 +158288.99 3 +197710.85 8410.0 – C57
2020-12-19 13:24:08 S 07 03 09.552 -40 26 01.18 – V C57
2020-12-19 13:24:08 s 1 +158177.56 4 +198433.74 6570.0 – C57
2020-12-19 13:34:08 S 07 03 09.331 -40 26 28.43 – V C57
2020-12-19 13:34:08 s 1 +158064.74 8 +199154.91 3100.0 – C57
2020-12-19 13:44:08 S 07 03 09.151 -40 27 03.60 – V C57
2020-12-19 13:44:08 s 1 +157950.55 6 +199874.34 8020.0 – C57
2020-12-19 14:34:08 S 07 03 08.069 -40 29 10.36 – V C57
2020-12-19 14:34:08 s 1 +157359.24 3 +203445.78 8810.0 – C57
2020-12-19 14:44:08 S 07 03 07.882 -40 29 37.86 – V C57
2020-12-19 14:44:08 s 1 +157236.97 1 +204154.95 4280.0 – C57
2020-12-19 14:54:08 S 07 03 07.783 -40 30 04.00 – V C57
2020-12-19 14:54:08 s 1 +157113.38 2 +204862.41 8210.0 – C57
2020-12-19 15:04:08 S 07 03 07.610 -40 30 30.92 – V C57
2020-12-19 15:04:08 s 1 +156988.48 4 +205568.18 610.0 – C57
2020-12-19 15:14:08 S 07 03 07.267 -40 30 58.00 – V C57
2020-12-19 15:14:08 s 1 +156862.28 6 +206272.26 1490.0 – C57
2020-12-19 15:24:08 S 07 03 07.070 -40 31 25.46 – 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)