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
2021-01-19 01:08:26 S 06 17 51.098 -67 11 14.14 – L C51
2021-01-19 07:25:04 S 06 17 08.32 -67 22 28.2 – L C51
2021-01-19 10:33:23 S 06 16 46.745 -67 28 04.15 – L C51
2021-01-19 13:40:58 S 06 16 25.01 -67 33 37.7 – L C51
2021-01-19 16:50:01 S 06 16 03.20 -67 39 15.1 – L C51
2021-01-19 19:58:21 S 06 15 41.17 -67 44 49.9 – L C51
2021-01-19 22:04:08 S 06 15 25.613 -68 07 42.56 – V C57
2021-01-19 22:04:08 s 1 -27145.394 0 +392876.86 250.0 – C57
2021-01-19 22:14:08 S 06 15 24.070 -68 07 59.66 – V C57
2021-01-19 22:14:08 s 1 -27491.233 0 +392903.96 5400.0 – C57
2021-01-19 22:24:08 S 06 15 22.543 -68 08 17.45 – V C57
2021-01-19 22:24:08 s 1 -27837.017 0 +392930.13 470.0 – C57
2021-01-19 22:34:08 S 06 15 21.478 -68 08 35.81 – V C57
2021-01-19 22:34:08 s 1 -28182.747 0 +392955.37 5470.0 – C57
2021-01-19 22:44:08 S 06 15 20.002 -68 08 54.96 – V C57
2021-01-19 22:44:08 s 1 -28528.421 0 +392979.69 380.0 – C57
2021-01-19 22:54:08 S 06 15 18.823 -68 09 12.17 – V C57
2021-01-19 22:54:08 s 1 -28874.040 0 +393003.09 5220.0 – C57
2021-01-19 23:04:08 S 06 15 17.287 -68 09 30.78 – V C57
2021-01-19 23:04:08 s 1 -29219.601 0 +393025.57 9970.0 – C57
2021-01-19 23:14:08 S 06 15 15.854 -68 09 47.88 – V C57
2021-01-19 23:14:08 s 1 -29565.104 0 +393047.12 4650.0 – C57
2021-01-19 23:24:08 S 06 15 14.263 -68 10 05.38 – V C57
2021-01-19 23:24:08 s 1 -29910.549 0 +393067.75 9230.0 – C57
2021-01-19 23:34:08 S 06 15 12.991 -68 10 24.60 – V C57
2021-01-19 23:34:08 s 1 -30255.934 0 +393087.46 3740.0 – C57
2021-01-19 23:44:08 S 06 15 11.861 -68 10 42.71 – V C57
2021-01-19 23:44:08 s 1 -30601.260 0 +393106.25 8150.0 – C57
2021-01-19 23:54:08 S 06 15 10.260 -68 11 00.20 – V C57
2021-01-19 23:54:08 s 1 -30946.524 0 +393124.11 2480.0 – C57
2021-01-20 00:04:08 S 06 15 08.767 -68 11 17.84 – V C57
2021-01-20 00:04:08 s 1 -31291.726 0 +393141.05 6720.0 – C57
2021-01-20 00:14:08 S 06 15 07.442 -68 11 34.84 – V C57
2021-01-20 00:14:08 s 1 -31636.866 0 +393157.07 870.0 – C57
2021-01-20 00:24:08 S 06 15 05.933 -68 11 53.63 – V C57
2021-01-20 00:24:08 s 1 -31981.942 0 +393172.17 4920.0 – C57
2021-01-20 00:34:08 S 06 15 04.558 -68 12 11.12 – V C57
2021-01-20 00:34:08 s 1 -32326.954 0 +393186.35 8880.0 – C57
2021-01-20 00:44:08 S 06 15 03.427 -68 12 29.38 – V C57
2021-01-20 00:44:08 s 1 -32671.901 0 +393199.61 2750.0 – C57
2021-01-20 00:54:08 S 06 15 01.858 -68 12 47.34 – V C57
2021-01-20 00:54:08 s 1 -33016.783 0 +393211.95 6520.0 – C57
2021-01-20 01:04:08 S 06 15 00.463 -68 13 05.84 – V C57
2021-01-20 01:04:08 s 1 -33361.598 0 +393223.37 190.0 – C57
2021-01-20 01:14:08 S 06 14 58.999 -68 13 23.12 – V C57
2021-01-20 01:14:08 s 1 -33706.345 0 +393233.87 3760.0 – C57
2021-01-20 01:24:08 S 06 14 57.538 -68 13 40.94 – V C57
2021-01-20 01:24:08 s 1 -34051.024 0 +393243.45 7230.0 – C57
2021-01-20 01:34:08 S 06 14 56.182 -68 13 58.62 – V C57
2021-01-20 01:34:08 s 1 -34395.635 0 +393252.11 600.0 – 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)