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
2021-01-08 03:44:08 s 1 -96105.785 0 +384616.19 6300.0 – C57
2021-01-08 03:54:08 S 06 41 04.200 -59 05 17.99 – V C57
2021-01-08 03:54:08 s 1 -96413.016 0 +384440.12 5960.0 – C57
2021-01-08 04:04:08 S 06 41 03.355 -59 05 39.05 – V C57
2021-01-08 04:04:08 s 1 -96720.020 0 +384263.17 5290.0 – C57
2021-01-08 04:14:08 S 06 41 02.390 -59 06 00.25 – V C57
2021-01-08 04:14:08 s 1 -97026.797 0 +384085.36 4270.0 – C57
2021-01-08 04:24:08 S 06 41 01.649 -59 06 19.69 – V C57
2021-01-08 04:24:08 s 1 -97333.346 0 +383906.67 2920.0 – C57
2021-01-08 04:34:08 S 06 41 00.787 -59 06 40.90 – V C57
2021-01-08 04:34:08 s 1 -97639.666 0 +383727.11 1220.0 – C57
2021-01-08 04:44:08 S 06 40 59.906 -59 07 01.74 – V C57
2021-01-08 04:44:08 s 1 -97945.757 0 +383546.69 9180.0 – C57
2021-01-08 04:54:08 S 06 40 59.165 -59 07 21.86 – V C57
2021-01-08 04:54:08 s 1 -98251.616 0 +383365.39 6800.0 – C57
2021-01-08 05:04:08 S 06 40 58.284 -59 07 42.60 – V C57
2021-01-08 05:04:08 s 1 -98557.244 0 +383183.21 4070.0 – C57
2021-01-08 05:14:08 S 06 40 57.278 -59 08 02.83 – V C57
2021-01-08 05:14:08 s 1 -98862.639 0 +383000.17 990.0 – C57
2021-01-08 05:24:08 S 06 40 56.554 -59 08 23.42 – V C57
2021-01-08 05:24:08 s 1 -99167.801 0 +382816.26 7570.0 – C57
2021-01-08 05:34:08 S 06 40 55.798 -59 08 44.81 – V C57
2021-01-08 05:34:08 s 1 -99472.728 0 +382631.47 3800.0 – C57
2021-01-08 05:44:08 S 06 40 54.866 -59 09 04.68 – V C57
2021-01-08 05:44:08 s 1 -99777.421 0 +382445.81 9670.0 – C57
2021-01-08 05:54:08 S 06 40 53.933 -59 09 26.21 – V C57
2021-01-08 05:54:08 s 1 -100081.87 7 +382259.28 5190.0 – C57
2021-01-08 06:04:08 S 06 40 53.239 -59 09 45.83 – V C57
2021-01-08 06:04:08 s 1 -100386.09 7 +382071.87 360.0 – C57
2021-01-08 06:14:08 S 06 40 52.202 -59 10 06.46 – V C57
2021-01-08 06:14:08 s 1 -100690.07 9 +381883.60 5180.0 – C57
2021-01-08 06:24:08 S 06 40 51.377 -59 10 27.23 – V C57
2021-01-08 06:24:08 s 1 -100993.82 2 +381694.44 9630.0 – C57
2021-01-08 06:34:08 S 06 40 50.578 -59 10 47.82 – V C57
2021-01-08 06:34:08 s 1 -101297.32 6 +381504.42 3730.0 – C57
2021-01-08 06:44:08 S 06 40 49.786 -59 11 08.34 – V C57
2021-01-08 06:44:08 s 1 -101600.58 9 +381313.52 7470.0 – C57
2021-01-08 06:54:08 S 06 40 48.852 -59 11 29.26 – V C57
2021-01-08 06:54:08 s 1 -101903.61 1 +381121.75 850.0 – C57
2021-01-08 07:04:08 S 06 40 48.072 -59 11 49.52 – V C57
2021-01-08 07:04:08 s 1 -102206.39 1 +380929.10 3860.0 – C57
2021-01-08 07:14:08 S 06 40 47.290 -59 12 09.90 – V C57
2021-01-08 07:14:08 s 1 -102508.92 8 +380735.58 6520.0 – C57
2021-01-08 07:24:08 S 06 40 46.337 -59 12 30.42 – V C57
2021-01-08 07:24:08 s 1 -102811.22 1 +380541.18 8800.0 – C57
2021-01-08 07:34:08 S 06 40 45.600 -59 12 50.26 – V C57
2021-01-08 07:34:08 s 1 -103113.26 9 +380345.91 730.0 – C57
2021-01-08 07:44:08 S 06 40 44.782 -59 13 11.57 – V C57
2021-01-08 07:44:08 s 1 -103415.07 2 +380149.76 2280.0 – C57
2021-01-08 07:54:08 S 06 40 43.788 -59 13 31.94 – 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)