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
2021-01-12 08:44:08 s 1 -183211.50 7 +95683.006 7880.0 – C57
2021-01-12 08:54:08 S 06 32 14.045 -62 17 34.62 – V C57
2021-01-12 08:54:08 s 1 -182982.73 2 +94836.451 6850.0 – C57
2021-01-12 09:04:08 S 06 32 13.267 -62 17 51.97 – V C57
2021-01-12 09:04:08 s 1 -182751.05 8 +93988.405 900.0 – C57
2021-01-12 09:14:08 S 06 32 12.396 -62 18 09.83 – V C57
2021-01-12 09:14:08 s 1 -182516.46 5 +93138.868 0.0 – C57
2021-01-12 09:24:08 S 06 32 11.669 -62 18 26.28 – V C57
2021-01-12 09:24:08 s 1 -182278.93 1 +92287.842 4110.0 – C57
2021-01-12 09:34:08 S 06 32 10.716 -62 18 43.88 – V C57
2021-01-12 09:34:08 s 1 -182038.43 4 +91435.327 3190.0 – C57
2021-01-12 09:44:08 S 06 32 09.866 -62 19 00.91 – V C57
2021-01-12 09:44:08 s 1 -181794.95 2 +90581.324 7210.0 – C57
2021-01-12 09:54:08 S 06 32 09.334 -62 19 17.36 – V C57
2021-01-12 09:54:08 s 1 -181548.46 2 +89725.834 6130.0 – C57
2021-01-12 10:04:08 S 06 32 08.606 -62 19 33.96 – V C57
2021-01-12 10:04:08 s 1 -181298.94 4 +88868.858 9900.0 – C57
2021-01-12 10:14:08 S 06 32 07.450 -62 19 51.56 – V C57
2021-01-12 10:14:08 s 1 -181046.37 3 +88010.397 8490.0 – C57
2021-01-12 10:24:08 S 06 32 06.689 -62 20 10.07 – V C57
2021-01-12 10:24:08 s 1 -180790.72 7 +87150.452 1870.0 – C57
2021-01-12 10:34:08 S 06 32 05.866 -62 20 26.48 – V C57
2021-01-12 10:34:08 s 1 -180531.98 3 +86289.025 9990.0 – C57
2021-01-12 10:44:08 S 06 32 05.362 -62 20 43.33 – V C57
2021-01-12 10:44:08 s 1 -180270.11 8 +85426.117 2800.0 – C57
2021-01-12 10:54:08 S 06 32 04.519 -62 20 57.84 – V C57
2021-01-12 10:54:08 s 1 -180005.10 7 +84561.729 280.0 – C57
2021-01-12 11:04:08 S 06 32 03.667 -62 21 16.70 – V C57
2021-01-12 11:04:08 s 1 -179736.92 7 +83695.864 2370.0 – C57
2021-01-12 11:14:08 S 06 32 02.794 -62 21 35.46 – V C57
2021-01-12 11:14:08 s 1 -179465.55 4 +82828.522 9050.0 – C57
2021-01-12 11:24:08 S 06 32 02.158 -62 21 51.44 – V C57
2021-01-12 11:24:08 s 1 -179190.96 3 +81959.707 250.0 – C57
2021-01-12 11:34:08 S 06 32 01.253 -62 22 08.22 – V C57
2021-01-12 11:34:08 s 1 -178913.12 9 +81089.419 5950.0 – C57
2021-01-12 11:44:08 S 06 32 00.264 -62 22 25.61 – V C57
2021-01-12 11:44:08 s 1 -178632.02 7 +80217.660 6100.0 – C57
2021-01-12 11:54:08 S 06 31 59.705 -62 22 42.74 – V C57
2021-01-12 11:54:08 s 1 -178347.63 2 +79344.434 660.0 – C57
2021-01-12 12:04:08 S 06 31 58.812 -62 22 58.91 – V C57
2021-01-12 12:04:08 s 1 -178059.91 9 +78469.742 9580.0 – C57
2021-01-12 12:14:08 S 06 31 58.181 -62 23 16.84 – V C57
2021-01-12 12:14:08 s 1 -177768.86 1 +77593.587 2810.0 – C57
2021-01-12 12:24:08 S 06 31 57.312 -62 23 32.64 – V C57
2021-01-12 12:24:08 s 1 -177474.43 2 +76715.972 320.0 – C57
2021-01-12 12:34:08 S 06 31 56.383 -62 23 50.86 – V C57
2021-01-12 12:34:08 s 1 -177176.60 6 +75836.898 2050.0 – C57
2021-01-12 12:44:08 S 06 31 55.913 -62 24 06.55 – V C57
2021-01-12 12:44:08 s 1 -176875.35 6 +74956.370 7970.0 – C57
2021-01-12 12:54:08 S 06 31 55.061 -62 24 23.69 – 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)