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
2021-01-06 08:54:08 s 1 -11891.206 0 +401245.81 4890.0 – C57
2021-01-06 09:04:08 S 06 44 32.770 -57 34 26.04 – V C57
2021-01-06 09:04:08 s 1 -12231.009 0 +401292.10 2540.0 – C57
2021-01-06 09:14:08 S 06 44 31.944 -57 34 48.54 – V C57
2021-01-06 09:14:08 s 1 -12570.779 0 +401337.52 130.0 – C57
2021-01-06 09:24:08 S 06 44 31.102 -57 35 10.54 – V C57
2021-01-06 09:24:08 s 1 -12910.517 0 +401382.05 7670.0 – C57
2021-01-06 09:34:08 S 06 44 30.415 -57 35 32.32 – V C57
2021-01-06 09:34:08 s 1 -13250.220 0 +401425.70 5160.0 – C57
2021-01-06 09:44:08 S 06 44 29.690 -57 35 53.84 – V C57
2021-01-06 09:44:08 s 1 -13589.889 0 +401468.47 2590.0 – C57
2021-01-06 09:54:08 S 06 44 28.699 -57 36 15.05 – V C57
2021-01-06 09:54:08 s 1 -13929.522 0 +401510.36 9970.0 – C57
2021-01-06 10:04:08 S 06 44 27.977 -57 36 37.44 – V C57
2021-01-06 10:04:08 s 1 -14269.120 0 +401551.37 7300.0 – C57
2021-01-06 10:14:08 S 06 44 27.425 -57 36 58.61 – V C57
2021-01-06 10:14:08 s 1 -14608.680 0 +401591.50 4570.0 – C57
2021-01-06 10:24:08 S 06 44 26.450 -57 37 20.50 – V C57
2021-01-06 10:24:08 s 1 -14948.202 0 +401630.75 1780.0 – C57
2021-01-06 10:34:08 S 06 44 25.843 -57 37 43.03 – V C57
2021-01-06 10:34:08 s 1 -15287.686 0 +401669.12 8930.0 – C57
2021-01-06 10:44:08 S 06 44 25.116 -57 38 03.52 – V C57
2021-01-06 10:44:08 s 1 -15627.131 0 +401706.62 6020.0 – C57
2021-01-06 10:54:08 S 06 44 24.094 -57 38 26.70 – V C57
2021-01-06 10:54:08 s 1 -15966.536 0 +401743.23 3060.0 – C57
2021-01-06 11:04:08 S 06 44 23.376 -57 38 48.37 – V C57
2021-01-06 11:04:08 s 1 -16305.901 0 +401778.96 30.0 – C57
2021-01-06 11:14:08 S 06 44 22.690 -57 39 10.84 – V C57
2021-01-06 11:14:08 s 1 -16645.224 0 +401813.82 6940.0 – C57
2021-01-06 11:24:08 S 06 44 21.790 -57 39 31.46 – V C57
2021-01-06 11:24:08 s 1 -16984.505 0 +401847.80 3780.0 – C57
2021-01-06 11:34:08 S 06 44 21.010 -57 39 53.60 – V C57
2021-01-06 11:34:08 s 1 -17323.743 0 +401880.90 560.0 – C57
2021-01-06 11:44:08 S 06 44 20.386 -57 40 14.59 – V C57
2021-01-06 11:44:08 s 1 -17662.937 0 +401913.12 7280.0 – C57
2021-01-06 11:54:08 S 06 44 19.476 -57 40 36.88 – V C57
2021-01-06 11:54:08 s 1 -18002.088 0 +401944.47 3930.0 – C57
2021-01-06 12:04:08 S 06 44 18.646 -57 40 58.19 – V C57
2021-01-06 12:04:08 s 1 -18341.193 0 +401974.94 510.0 – C57
2021-01-06 12:14:08 S 06 44 17.969 -57 41 19.57 – V C57
2021-01-06 12:14:08 s 1 -18680.252 0 +402004.53 7020.0 – C57
2021-01-06 12:24:08 S 06 44 17.131 -57 41 41.46 – V C57
2021-01-06 12:24:08 s 1 -19019.265 0 +402033.25 3460.0 – C57
2021-01-06 12:34:08 S 06 44 16.346 -57 42 02.99 – V C57
2021-01-06 12:34:08 s 1 -19358.230 0 +402061.09 9830.0 – C57
2021-01-06 12:44:08 S 06 44 15.650 -57 42 25.31 – V C57
2021-01-06 12:44:08 s 1 -19697.148 0 +402088.05 6130.0 – C57
2021-01-06 12:54:08 S 06 44 14.760 -57 42 46.73 – V C57
2021-01-06 12:54:08 s 1 -20036.017 0 +402114.14 2360.0 – C57
2021-01-06 13:04:08 S 06 44 14.023 -57 43 08.69 – 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)