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
2020-12-23 03:24:08 s 1 +15297.153 0 +396583.77 8270.0 – C57
2020-12-23 03:34:08 S 07 00 34.366 -44 13 49.51 – V C57
2020-12-23 03:34:08 s 1 +14954.200 0 +396695.23 3830.0 – C57
2020-12-23 03:44:08 S 07 00 34.104 -44 14 15.29 – V C57
2020-12-23 03:44:08 s 1 +14611.208 0 +396805.78 9370.0 – C57
2020-12-23 03:54:08 S 07 00 33.830 -44 14 40.81 – V C57
2020-12-23 03:54:08 s 1 +14268.178 0 +396915.43 4910.0 – C57
2020-12-23 04:04:08 S 07 00 33.370 -44 15 06.95 – V C57
2020-12-23 04:04:08 s 1 +13925.110 0 +397024.17 440.0 – C57
2020-12-23 04:14:08 S 07 00 32.885 -44 15 32.62 – V C57
2020-12-23 04:14:08 s 1 +13582.005 0 +397132.00 5960.0 – C57
2020-12-23 04:24:08 S 07 00 32.566 -44 15 57.96 – V C57
2020-12-23 04:24:08 s 1 +13238.864 0 +397238.93 1470.0 – C57
2020-12-23 04:34:08 S 07 00 32.239 -44 16 23.45 – V C57
2020-12-23 04:34:08 s 1 +12895.688 0 +397344.95 6960.0 – C57
2020-12-23 04:44:08 S 07 00 31.915 -44 16 48.29 – V C57
2020-12-23 04:44:08 s 1 +12552.477 0 +397450.06 2450.0 – C57
2020-12-23 04:54:08 S 07 00 31.486 -44 17 15.36 – V C57
2020-12-23 04:54:08 s 1 +12209.234 0 +397554.27 7920.0 – C57
2020-12-23 05:04:08 S 07 00 31.013 -44 17 41.32 – V C57
2020-12-23 05:04:08 s 1 +11865.957 0 +397657.57 3380.0 – C57
2020-12-23 05:14:08 S 07 00 30.598 -44 18 06.95 – V C57
2020-12-23 05:14:08 s 1 +11522.649 0 +397759.97 8820.0 – C57
2020-12-23 05:24:08 S 07 00 30.382 -44 18 31.75 – V C57
2020-12-23 05:24:08 s 1 +11179.309 0 +397861.47 4250.0 – C57
2020-12-23 05:34:08 S 07 00 29.935 -44 18 56.63 – V C57
2020-12-23 05:34:08 s 1 +10835.939 0 +397962.06 9660.0 – C57
2020-12-23 05:44:08 S 07 00 29.503 -44 19 23.52 – V C57
2020-12-23 05:44:08 s 1 +10492.540 0 +398061.74 5050.0 – C57
2020-12-23 05:54:08 S 07 00 29.335 -44 19 48.68 – V C57
2020-12-23 05:54:08 s 1 +10149.112 0 +398160.53 420.0 – C57
2020-12-23 06:04:08 S 07 00 28.759 -44 20 15.32 – V C57
2020-12-23 06:14:08 S 07 00 28.406 -44 20 39.95 – V C57
2020-12-23 06:24:08 S 07 00 27.941 -44 21 05.72 – V C57
2020-12-23 06:34:08 S 07 00 27.559 -44 21 31.68 – V C57
2020-12-23 06:44:08 S 07 00 27.240 -44 21 57.31 – V C57
2020-12-23 06:54:08 S 07 00 26.878 -44 22 23.45 – V C57
2020-12-23 07:04:08 S 07 00 26.400 -44 22 48.58 – V C57
2020-12-23 07:14:08 S 07 00 26.052 -44 23 13.81 – V C57
2020-12-23 07:24:08 S 07 00 25.673 -44 23 39.88 – V C57
2020-12-23 07:34:08 S 07 00 25.358 -44 24 05.26 – V C57
2020-12-23 07:44:08 S 07 00 24.881 -44 24 31.25 – V C57
2020-12-23 07:54:08 S 07 00 24.456 -44 24 57.35 – V C57
2020-12-23 08:04:08 S 07 00 24.096 -44 25 23.23 – V C57
2020-12-23 08:14:08 S 07 00 23.712 -44 25 47.46 – V C57
2020-12-23 08:24:08 S 07 00 23.354 -44 26 12.88 – V C57
2020-12-23 08:34:08 S 07 00 22.898 -44 26 38.94 – V C57
2020-12-23 08:44:08 S 07 00 22.615 -44 27 04.39 – V C57
2020-12-23 08:54:08 S 07 00 22.164 -44 27 31.14 – V C57
2020-12-23 09:04:08 S 07 00 21.754 -44 27 55.30 – 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)