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
2021-01-22 01:24:08 S 06 07 55.397 -69 36 41.26 – V C57
2021-01-22 01:24:08 s 1 -127204.94 5 +358151.78 920.0 – C57
2021-01-22 01:34:08 S 06 07 53.834 -69 36 58.90 – V C57
2021-01-22 01:34:08 s 1 -127494.91 6 +357897.83 4210.0 – C57
2021-01-22 01:44:08 S 06 07 52.327 -69 37 14.81 – V C57
2021-01-22 01:44:08 s 1 -127784.56 0 +357642.94 6940.0 – C57
2021-01-22 01:54:08 S 06 07 50.822 -69 37 32.27 – V C57
2021-01-22 01:54:08 s 1 -128073.87 6 +357387.12 9120.0 – C57
2021-01-22 02:04:08 S 06 07 49.121 -69 37 47.06 – V C57
2021-01-22 02:04:08 s 1 -128362.86 2 +357130.37 750.0 – C57
2021-01-22 02:14:07 S 06 07 47.830 -69 38 04.67 – V C57
2021-01-22 02:14:07 s 1 -128651.51 9 +356872.68 1810.0 – C57
2021-01-22 02:24:08 S 06 07 46.133 -69 38 20.87 – V C57
2021-01-22 02:24:08 s 1 -128939.84 4 +356614.06 2320.0 – C57
2021-01-22 02:34:07 S 06 07 44.530 -69 38 37.90 – V C57
2021-01-22 02:34:07 s 1 -129227.83 6 +356354.50 2260.0 – C57
2021-01-22 02:44:08 S 06 07 43.082 -69 38 53.59 – V C57
2021-01-22 02:44:08 s 1 -129515.49 4 +356094.01 1640.0 – C57
2021-01-22 02:54:08 S 06 07 41.479 -69 39 11.38 – V C57
2021-01-22 02:54:08 s 1 -129802.81 8 +355832.58 450.0 – C57
2021-01-22 03:04:08 S 06 07 40.150 -69 39 28.33 – V C57
2021-01-22 03:04:08 s 1 -130089.80 5 +355570.21 8690.0 – C57
2021-01-22 03:14:08 S 06 07 38.722 -69 39 44.10 – V C57
2021-01-22 03:14:08 s 1 -130376.45 5 +355306.90 6360.0 – C57
2021-01-22 03:24:08 S 06 07 36.835 -69 39 59.62 – V C57
2021-01-22 03:24:08 s 1 -130662.76 6 +355042.66 3460.0 – C57
2021-01-22 03:34:08 S 06 07 35.354 -69 40 16.72 – V C57
2021-01-22 03:34:08 s 1 -130948.73 8 +354777.48 9990.0 – C57
2021-01-22 03:44:07 S 06 07 33.607 -69 40 33.60 – V C57
2021-01-22 03:44:07 s 1 -131234.36 9 +354511.37 5940.0 – C57
2021-01-22 03:54:08 S 06 07 32.280 -69 40 50.41 – V C57
2021-01-22 03:54:08 s 1 -131519.65 8 +354244.31 1300.0 – C57
2021-01-22 04:04:07 S 06 07 30.898 -69 41 07.08 – V C57
2021-01-22 04:04:07 s 1 -131804.60 4 +353976.32 6090.0 – C57
2021-01-22 04:14:08 S 06 07 29.350 -69 41 24.22 – V C57
2021-01-22 04:14:08 s 1 -132089.20 5 +353707.38 300.0 – C57
2021-01-22 04:24:08 S 06 07 27.794 -69 41 40.24 – V C57
2021-01-22 04:24:08 s 1 -132373.46 1 +353437.51 3920.0 – C57
2021-01-22 04:34:08 S 06 07 26.182 -69 41 57.08 – V C57
2021-01-22 04:34:08 s 1 -132657.37 0 +353166.70 6950.0 – C57
2021-01-22 04:44:08 S 06 07 24.770 -69 42 14.00 – V C57
2021-01-22 04:44:08 s 1 -132940.93 1 +352894.95 9390.0 – C57
2021-01-22 04:54:08 S 06 07 22.992 -69 42 29.30 – V C57
2021-01-22 04:54:08 s 1 -133224.14 2 +352622.25 1240.0 – C57
2021-01-22 05:04:08 S 06 07 21.518 -69 42 46.80 – V C57
2021-01-22 05:04:08 s 1 -133507.00 4 +352348.62 2500.0 – C57
2021-01-22 05:14:07 S 06 07 20.179 -69 43 03.86 – V C57
2021-01-22 05:14:07 s 1 -133789.51 3 +352074.04 3160.0 – C57
2021-01-22 05:24:08 S 06 07 18.600 -69 43 20.71 – V C57
2021-01-22 05:24:08 s 1 -134071.67 0 +351798.52 3230.0 – 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)