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
2021-01-20 05:54:08 S 06 14 20.030 -68 21 44.21 – V C57
2021-01-20 05:54:08 s 1 -43328.710 0 +393155.45 7860.0 – C57
2021-01-20 06:04:08 S 06 14 18.346 -68 22 01.13 – V C57
2021-01-20 06:04:08 s 1 -43671.160 0 +393139.38 7950.0 – C57
2021-01-20 06:14:08 S 06 14 16.843 -68 22 19.09 – V C57
2021-01-20 06:14:08 s 1 -44013.518 0 +393122.40 7910.0 – C57
2021-01-20 06:24:08 S 06 14 15.574 -68 22 36.91 – V C57
2021-01-20 06:24:08 s 1 -44355.785 0 +393104.51 7720.0 – C57
2021-01-20 06:34:08 S 06 14 14.287 -68 22 53.58 – V C57
2021-01-20 06:34:08 s 1 -44697.959 0 +393085.70 7380.0 – C57
2021-01-20 07:24:08 S 06 14 06.994 -68 24 23.26 – V C57
2021-01-20 07:24:08 s 1 -46407.411 0 +392977.99 3520.0 – C57
2021-01-20 07:34:08 S 06 14 05.390 -68 24 40.93 – V C57
2021-01-20 07:34:08 s 1 -46749.013 0 +392953.71 2290.0 – C57
2021-01-20 07:44:08 S 06 14 04.063 -68 24 58.54 – V C57
2021-01-20 07:44:08 s 1 -47090.516 0 +392928.52 920.0 – C57
2021-01-20 07:54:08 S 06 14 02.825 -68 25 17.44 – V C57
2021-01-20 07:54:08 s 1 -47431.920 0 +392902.42 9390.0 – C57
2021-01-20 08:04:08 S 06 14 01.356 -68 25 33.89 – V C57
2021-01-20 08:04:08 s 1 -47773.225 0 +392875.41 7700.0 – C57
2021-01-20 08:14:08 S 06 13 59.849 -68 25 53.04 – V C57
2021-01-20 08:14:08 s 1 -48114.428 0 +392847.49 5860.0 – C57
2021-01-20 08:24:08 S 06 13 58.289 -68 26 10.57 – V C57
2021-01-20 08:24:08 s 1 -48455.531 0 +392818.66 3860.0 – C57
2021-01-20 08:34:08 S 06 13 56.827 -68 26 27.10 – V C57
2021-01-20 08:34:08 s 1 -48796.531 0 +392788.91 1700.0 – C57
2021-01-20 08:44:08 S 06 13 55.546 -68 26 45.42 – V C57
2021-01-20 08:44:08 s 1 -49137.428 0 +392758.26 9370.0 – C57
2021-01-20 08:54:08 S 06 13 54.338 -68 27 03.20 – V C57
2021-01-20 08:54:08 s 1 -49478.222 0 +392726.70 6890.0 – C57
2021-01-20 09:04:08 S 06 13 52.963 -68 27 21.92 – V C57
2021-01-20 09:04:08 s 1 -49818.911 0 +392694.22 4240.0 – C57
2021-01-20 09:14:08 S 06 13 51.432 -68 27 39.35 – V C57
2021-01-20 09:14:08 s 1 -50159.495 0 +392660.84 1420.0 – C57
2021-01-20 09:24:08 S 06 13 50.102 -68 27 56.84 – V C57
2021-01-20 09:24:08 s 1 -50499.973 0 +392626.55 8440.0 – C57
2021-01-20 09:34:08 S 06 13 48.437 -68 28 13.26 – V C57
2021-01-20 09:34:08 s 1 -50840.343 0 +392591.35 5290.0 – C57
2021-01-20 09:44:08 S 06 13 47.254 -68 28 31.44 – V C57
2021-01-20 09:44:08 s 1 -51180.606 0 +392555.24 1970.0 – C57
2021-01-20 09:54:08 S 06 13 45.869 -68 28 50.05 – V C57
2021-01-20 09:54:08 s 1 -51520.761 0 +392518.22 8480.0 – C57
2021-01-20 10:04:08 S 06 13 44.347 -68 29 07.30 – V C57
2021-01-20 10:04:08 s 1 -51860.806 0 +392480.29 4820.0 – C57
2021-01-20 10:14:08 S 06 13 42.854 -68 29 25.66 – V C57
2021-01-20 10:14:08 s 1 -52200.741 0 +392441.45 980.0 – C57
2021-01-20 10:24:08 S 06 13 41.489 -68 29 43.12 – V C57
2021-01-20 10:24:08 s 1 -52540.565 0 +392401.70 6970.0 – C57
2021-01-20 10:34:08 S 06 13 39.893 -68 30 00.18 – V C57
2021-01-20 10:34:08 s 1 -52880.278 0 +392361.04 2780.0 – 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)