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
2020-12-24 01:14:08 s 1 -29673.037 0 +403576.76 7680.0 – C57
2020-12-24 01:24:08 S 06 59 42.636 -45 09 29.30 – V C57
2020-12-24 01:24:08 s 1 -30014.434 0 +403571.96 3740.0 – C57
2020-12-24 01:34:08 S 06 59 42.218 -45 09 55.66 – V C57
2020-12-24 01:34:08 s 1 -30355.769 0 +403566.28 9660.0 – C57
2020-12-24 01:44:08 S 06 59 41.810 -45 10 20.78 – V C57
2020-12-24 01:44:08 s 1 -30697.042 0 +403559.73 5440.0 – C57
2020-12-24 02:14:08 S 06 59 40.606 -45 11 36.31 – V C57
2020-12-24 02:14:08 s 1 -31720.476 0 +403534.86 1930.0 – C57
2020-12-24 02:24:08 S 06 59 40.106 -45 12 02.27 – V C57
2020-12-24 02:24:08 s 1 -32061.489 0 +403524.82 7140.0 – C57
2020-12-24 02:34:08 S 06 59 39.751 -45 12 26.71 – V C57
2020-12-24 02:34:08 s 1 -32402.437 0 +403513.91 2210.0 – C57
2020-12-24 03:04:08 S 06 59 38.566 -45 13 42.71 – V C57
2020-12-24 03:04:08 s 1 -33424.872 0 +403475.96 6520.0 – C57
2020-12-24 03:14:08 S 06 59 38.129 -45 14 08.05 – V C57
2020-12-24 03:14:08 s 1 -33765.546 0 +403461.57 1000.0 – C57
2020-12-24 03:24:08 S 06 59 37.685 -45 14 33.61 – V C57
2020-12-24 03:24:08 s 1 -34106.149 0 +403446.31 5320.0 – C57
2020-12-24 03:34:08 S 06 59 37.250 -45 14 58.99 – V C57
2020-12-24 03:34:08 s 1 -34446.682 0 +403430.17 9500.0 – C57
2020-12-24 03:44:08 S 06 59 36.838 -45 15 23.26 – V C57
2020-12-24 03:44:08 s 1 -34787.143 0 +403413.17 3520.0 – C57
2020-12-24 03:54:08 S 06 59 36.449 -45 15 49.46 – V C57
2020-12-24 03:54:08 s 1 -35127.531 0 +403395.29 7390.0 – C57
2020-12-24 04:04:08 S 06 59 36.067 -45 16 13.87 – V C57
2020-12-24 04:04:08 s 1 -35467.846 0 +403376.55 1110.0 – C57
2020-12-24 04:14:08 S 06 59 35.597 -45 16 39.72 – V C57
2020-12-24 04:14:08 s 1 -35808.087 0 +403356.93 4670.0 – C57
2020-12-24 04:24:08 S 06 59 35.239 -45 17 05.17 – V C57
2020-12-24 04:24:08 s 1 -36148.253 0 +403336.44 8080.0 – C57
2020-12-24 04:34:08 S 06 59 34.810 -45 17 29.83 – V C57
2020-12-24 04:34:08 s 1 -36488.344 0 +403315.09 1330.0 – C57
2020-12-24 04:44:08 S 06 59 34.370 -45 17 54.28 – V C57
2020-12-24 04:44:08 s 1 -36828.358 0 +403292.86 4420.0 – C57
2020-12-24 04:54:08 S 06 59 33.826 -45 18 20.66 – V C57
2020-12-24 04:54:08 s 1 -37168.296 0 +403269.76 7350.0 – C57
2020-12-24 05:04:08 S 06 59 33.427 -45 18 45.18 – V C57
2020-12-24 05:04:08 s 1 -37508.155 0 +403245.80 130.0 – C57
2020-12-24 05:14:08 S 06 59 33.161 -45 19 11.03 – V C57
2020-12-24 05:14:08 s 1 -37847.936 0 +403220.96 2740.0 – C57
2020-12-24 05:24:08 S 06 59 32.748 -45 19 36.48 – V C57
2020-12-24 05:24:08 s 1 -38187.638 0 +403195.25 5190.0 – C57
2020-12-24 05:34:08 S 06 59 32.294 -45 20 01.57 – V C57
2020-12-24 05:34:08 s 1 -38527.261 0 +403168.68 7470.0 – C57
2020-12-24 05:44:08 S 06 59 31.834 -45 20 26.59 – V C57
2020-12-24 05:44:08 s 1 -38866.802 0 +403141.23 9600.0 – C57
2020-12-24 05:54:08 S 06 59 31.488 -45 20 52.33 – V C57
2020-12-24 05:54:08 s 1 -39206.262 0 +403112.92 1560.0 – C57
2020-12-24 06:04:08 S 06 59 31.090 -45 21 15.98 – 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)