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
2021-01-10 15:44:08 s 1 -183544.18 9 +261748.23 6290.0 – C57
2021-01-10 15:54:08 S 06 35 48.384 -61 03 45.54 – V C57
2021-01-10 15:54:08 s 1 -183689.67 2 +261226.23 1630.0 – C57
2021-01-10 16:04:08 S 06 35 47.470 -61 04 04.69 – V C57
2021-01-10 16:04:08 s 1 -183834.35 6 +260703.10 5680.0 – C57
2021-01-10 16:14:08 S 06 35 46.567 -61 04 23.70 – V C57
2021-01-10 16:14:08 s 1 -183978.23 7 +260178.86 8410.0 – C57
2021-01-10 16:24:08 S 06 35 45.787 -61 04 41.63 – V C57
2021-01-10 16:24:08 s 1 -184121.31 3 +259653.49 9840.0 – C57
2021-01-10 16:34:08 S 06 35 44.772 -61 05 00.92 – V C57
2021-01-10 16:34:08 s 1 -184263.58 0 +259127.00 9940.0 – C57
2021-01-10 16:44:08 S 06 35 44.393 -61 05 18.92 – V C57
2021-01-10 16:44:08 s 1 -184405.03 5 +258599.39 8730.0 – C57
2021-01-10 17:34:08 S 06 35 39.586 -61 06 52.60 – V C57
2021-01-10 17:34:08 s 1 -185100.01 8 +255944.41 2590.0 – C57
2021-01-10 17:44:08 S 06 35 38.666 -61 07 11.57 – V C57
2021-01-10 17:44:08 s 1 -185236.53 3 +255410.02 3310.0 – C57
2021-01-10 17:54:08 S 06 35 37.495 -61 07 30.47 – V C57
2021-01-10 17:54:08 s 1 -185372.21 3 +254874.50 2670.0 – C57
2021-01-10 18:04:08 S 06 35 36.806 -61 07 49.37 – V C57
2021-01-10 18:04:08 s 1 -185507.05 5 +254337.84 660.0 – C57
2021-01-10 18:14:08 S 06 35 35.959 -61 08 07.26 – V C57
2021-01-10 18:14:08 s 1 -185641.05 5 +253800.05 7270.0 – C57
2021-01-10 18:24:08 S 06 35 34.882 -61 08 26.81 – V C57
2021-01-10 18:24:08 s 1 -185774.21 0 +253261.12 2510.0 – C57
2021-01-10 18:34:08 S 06 35 34.025 -61 08 46.00 – V C57
2021-01-10 18:34:08 s 1 -185906.51 7 +252721.05 6350.0 – C57
2021-01-10 18:44:08 S 06 35 33.139 -61 09 03.31 – V C57
2021-01-10 18:44:08 s 1 -186037.97 1 +252179.83 8810.0 – C57
2021-01-10 18:54:08 S 06 35 32.318 -61 09 23.15 – V C57
2021-01-10 18:54:08 s 1 -186168.57 0 +251637.48 9860.0 – C57
2021-01-10 19:04:08 S 06 35 31.310 -61 09 41.65 – V C57
2021-01-10 19:04:08 s 1 -186298.31 0 +251093.98 9510.0 – C57
2021-01-10 19:14:08 S 06 35 30.578 -61 09 59.87 – V C57
2021-01-10 19:14:08 s 1 -186427.18 8 +250549.34 7760.0 – C57
2021-01-10 19:24:08 S 06 35 29.638 -61 10 17.72 – V C57
2021-01-10 19:24:08 s 1 -186555.20 0 +250003.54 4580.0 – C57
2021-01-10 19:34:08 S 06 35 28.644 -61 10 37.09 – V C57
2021-01-10 19:34:08 s 1 -186682.34 3 +249456.61 9980.0 – C57
2021-01-10 19:44:08 S 06 35 27.818 -61 10 55.85 – V C57
2021-01-10 19:44:08 s 1 -186808.61 2 +248908.52 3950.0 – C57
2021-01-10 19:54:08 S 06 35 27.038 -61 11 14.64 – V C57
2021-01-10 19:54:08 s 1 -186934.00 5 +248359.28 6490.0 – C57
2021-01-10 20:04:08 S 06 35 26.059 -61 11 33.22 – V C57
2021-01-10 20:04:08 s 1 -187058.51 7 +247808.88 7590.0 – C57
2021-01-10 20:14:08 S 06 35 25.094 -61 11 52.12 – V C57
2021-01-10 20:14:08 s 1 -187182.14 6 +247257.34 7230.0 – C57
2021-01-10 20:24:08 S 06 35 24.190 -61 12 10.01 – V C57
2021-01-10 20:24:08 s 1 -187304.88 7 +246704.64 5430.0 – C57
2021-01-10 20:34:08 S 06 35 23.419 -61 12 28.73 – 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)