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
2021-02-03 18:04:07 s 1 -99108.756 0 +372919.79 5780.0 – C57
2021-02-03 18:14:07 S 05 02 45.221 -77 51 16.81 – V C57
2021-02-03 18:14:07 s 1 -99424.658 0 +372743.01 9560.0 – C57
2021-02-03 18:24:07 S 05 02 41.419 -77 51 30.96 – V C57
2021-02-03 18:24:07 s 1 -99740.312 0 +372565.30 2970.0 – C57
2021-02-03 18:34:07 S 05 02 37.920 -77 51 44.68 – V C57
2021-02-03 18:34:07 s 1 -100055.71 6 +372386.67 5990.0 – C57
2021-02-03 18:44:07 S 05 02 33.905 -77 52 00.41 – V C57
2021-02-03 18:44:07 s 1 -100370.87 0 +372207.11 8630.0 – C57
2021-02-03 18:54:07 S 05 02 30.166 -77 52 13.91 – V C57
2021-02-03 18:54:07 s 1 -100685.77 2 +372026.63 890.0 – C57
2021-02-03 19:04:07 S 05 02 26.095 -77 52 27.01 – V C57
2021-02-03 19:04:07 s 1 -101000.42 3 +371845.23 2760.0 – C57
2021-02-03 19:14:07 S 05 02 22.234 -77 52 40.84 – V C57
2021-02-03 19:14:07 s 1 -101314.82 0 +371662.90 4240.0 – C57
2021-02-03 19:24:07 S 05 02 18.533 -77 52 56.17 – V C57
2021-02-03 19:24:07 s 1 -101628.96 3 +371479.65 5330.0 – C57
2021-02-03 19:34:07 S 05 02 15.094 -77 53 09.38 – V C57
2021-02-03 19:34:07 s 1 -101942.85 1 +371295.48 6030.0 – C57
2021-02-03 19:44:07 S 05 02 11.112 -77 53 23.93 – V C57
2021-02-03 19:44:07 s 1 -102256.48 3 +371110.38 6330.0 – C57
2021-02-03 19:54:07 S 05 02 06.934 -77 53 38.26 – V C57
2021-02-03 19:54:07 s 1 -102569.85 7 +370924.36 6240.0 – C57
2021-02-03 20:04:07 S 05 02 03.379 -77 53 52.15 – V C57
2021-02-03 20:04:07 s 1 -102882.97 4 +370737.41 5760.0 – C57
2021-02-03 20:14:07 S 05 01 59.491 -77 54 06.26 – V C57
2021-02-03 20:14:07 s 1 -103195.83 2 +370549.53 4870.0 – C57
2021-02-03 20:24:07 S 05 01 56.009 -77 54 19.51 – V C57
2021-02-03 20:24:07 s 1 -103508.42 9 +370360.74 3590.0 – C57
2021-02-03 20:34:07 S 05 01 52.466 -77 54 34.60 – V C57
2021-02-03 20:34:07 s 1 -103820.76 6 +370171.01 1900.0 – C57
2021-02-03 20:44:07 S 05 01 48.286 -77 54 49.46 – V C57
2021-02-03 20:44:07 s 1 -104132.84 1 +369980.36 9810.0 – C57
2021-02-03 20:54:07 S 05 01 44.515 -77 55 02.78 – V C57
2021-02-03 20:54:07 s 1 -104444.65 3 +369788.79 7320.0 – C57
2021-02-03 21:04:07 S 05 01 40.783 -77 55 16.39 – V C57
2021-02-03 21:04:07 s 1 -104756.20 1 +369596.29 4410.0 – C57
2021-02-03 21:14:07 S 05 01 36.506 -77 55 31.22 – V C57
2021-02-03 21:14:07 s 1 -105067.48 4 +369402.86 1100.0 – C57
2021-02-03 21:24:07 S 05 01 32.770 -77 55 44.65 – V C57
2021-02-03 21:24:07 s 1 -105378.50 2 +369208.50 7380.0 – C57
2021-02-03 21:34:07 S 05 01 29.158 -77 55 58.55 – V C57
2021-02-03 21:34:07 s 1 -105689.25 3 +369013.22 3240.0 – C57
2021-02-03 21:44:07 S 05 01 25.087 -77 56 12.77 – V C57
2021-02-03 21:44:07 s 1 -105999.73 5 +368817.02 8690.0 – C57
2021-02-03 21:54:07 S 05 01 21.278 -77 56 25.55 – V C57
2021-02-03 21:54:07 s 1 -106309.94 9 +368619.88 3720.0 – C57
2021-02-03 22:04:07 S 05 01 17.638 -77 56 40.06 – V C57
2021-02-03 22:04:07 s 1 -106619.89 4 +368421.82 8340.0 – C57
2021-02-03 22:14:07 S 05 01 13.766 -77 56 54.28 – 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)