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
2021-01-09 09:14:08 s 1 -146096.33 6 +339619.41 6090.0 – C57
2021-01-09 09:24:08 S 06 38 31.390 -60 04 53.76 – V C57
2021-01-09 09:24:08 s 1 -146348.10 1 +339284.02 1160.0 – C57
2021-01-09 09:34:08 S 06 38 30.499 -60 05 13.92 – V C57
2021-01-09 09:34:08 s 1 -146599.44 9 +338947.69 5580.0 – C57
2021-01-09 09:44:08 S 06 38 29.381 -60 05 33.90 – V C57
2021-01-09 09:44:08 s 1 -146850.37 9 +338610.41 9360.0 – C57
2021-01-09 09:54:08 S 06 38 28.680 -60 05 53.99 – V C57
2021-01-09 09:54:08 s 1 -147100.88 9 +338272.19 2470.0 – C57
2021-01-09 10:04:08 S 06 38 27.725 -60 06 13.54 – V C57
2021-01-09 10:04:08 s 1 -147350.97 9 +337933.03 4940.0 – C57
2021-01-09 10:14:08 S 06 38 26.825 -60 06 34.42 – V C57
2021-01-09 10:14:08 s 1 -147600.64 6 +337592.92 6740.0 – C57
2021-01-09 10:24:08 S 06 38 25.982 -60 06 53.46 – V C57
2021-01-09 10:24:08 s 1 -147849.88 9 +337251.87 7890.0 – C57
2021-01-09 10:34:08 S 06 38 25.358 -60 07 11.10 – V C57
2021-01-09 10:34:08 s 1 -148098.70 8 +336909.86 8370.0 – C57
2021-01-09 10:44:08 S 06 38 24.199 -60 07 31.84 – V C57
2021-01-09 10:44:08 s 1 -148347.09 9 +336566.91 8190.0 – C57
2021-01-09 10:54:08 S 06 38 23.270 -60 07 53.47 – V C57
2021-01-09 10:54:08 s 1 -148595.06 3 +336223.01 7340.0 – C57
2021-01-09 11:04:08 S 06 38 22.606 -60 08 11.51 – V C57
2021-01-09 11:04:08 s 1 -148842.59 7 +335878.17 5820.0 – C57
2021-01-09 11:14:08 S 06 38 21.614 -60 08 30.73 – V C57
2021-01-09 11:14:08 s 1 -149089.70 1 +335532.37 3630.0 – C57
2021-01-09 11:24:08 S 06 38 20.695 -60 08 51.18 – V C57
2021-01-09 11:24:08 s 1 -149336.37 2 +335185.62 760.0 – C57
2021-01-09 11:34:08 S 06 38 19.879 -60 09 11.88 – V C57
2021-01-09 11:34:08 s 1 -149582.60 9 +334837.92 7210.0 – C57
2021-01-09 11:44:08 S 06 38 18.869 -60 09 31.07 – V C57
2021-01-09 11:44:08 s 1 -149828.41 1 +334489.28 2990.0 – C57
2021-01-09 11:54:08 S 06 38 18.103 -60 09 50.76 – V C57
2021-01-09 11:54:08 s 1 -150073.77 7 +334139.67 8080.0 – C57
2021-01-09 12:04:08 S 06 38 17.189 -60 10 10.52 – V C57
2021-01-09 12:04:08 s 1 -150318.70 4 +333789.12 2490.0 – C57
2021-01-09 12:14:08 S 06 38 16.322 -60 10 30.79 – V C57
2021-01-09 12:14:08 s 1 -150563.19 2 +333437.61 6220.0 – C57
2021-01-09 12:24:08 S 06 38 15.420 -60 10 50.84 – V C57
2021-01-09 12:24:08 s 1 -150807.23 8 +333085.15 9250.0 – C57
2021-01-09 12:34:08 S 06 38 14.563 -60 11 09.82 – V C57
2021-01-09 12:34:08 s 1 -151050.84 2 +332731.73 1590.0 – C57
2021-01-09 12:44:08 S 06 38 13.603 -60 11 29.80 – V C57
2021-01-09 12:44:08 s 1 -151294.00 3 +332377.36 3240.0 – C57
2021-01-09 12:54:08 S 06 38 12.713 -60 11 49.56 – V C57
2021-01-09 12:54:08 s 1 -151536.71 7 +332022.03 4190.0 – C57
2021-01-09 13:04:08 S 06 38 11.770 -60 12 09.11 – V C57
2021-01-09 13:04:08 s 1 -151778.98 5 +331665.74 4440.0 – C57
2021-01-09 13:14:08 S 06 38 11.004 -60 12 28.87 – V C57
2021-01-09 13:14:08 s 1 -152020.80 4 +331308.50 3980.0 – C57
2021-01-09 13:24:08 S 06 38 10.037 -60 12 48.17 – 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)