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
2020-12-27 01:44:08 s 1 -161130.36 4 +318267.98 2090.0 – C57
2020-12-27 01:54:08 S 06 56 25.106 -48 07 08.11 – V C57
2020-12-27 01:54:08 s 1 -161361.72 5 +317870.81 1490.0 – C57
2020-12-27 02:04:08 S 06 56 24.773 -48 07 30.32 – V C57
2020-12-27 02:04:08 s 1 -161592.57 1 +317472.64 100.0 – C57
2020-12-27 02:14:08 S 06 56 24.271 -48 07 56.14 – V C57
2020-12-27 02:14:08 s 1 -161822.90 0 +317073.46 7930.0 – C57
2020-12-27 02:17:20 C 06 56 48.35 -47 54 29.5 – q 834
2020-12-27 02:24:08 S 06 56 24.182 -48 08 19.36 – V C57
2020-12-27 02:24:08 s 1 -162052.71 0 +316673.29 4970.0 – C57
2020-12-27 02:34:08 S 06 56 23.146 -48 08 42.61 – V C57
2020-12-27 02:34:08 s 1 -162282.00 1 +316272.11 1210.0 – C57
2020-12-27 02:44:08 S 06 56 22.795 -48 09 06.52 – V C57
2020-12-27 02:44:08 s 1 -162510.76 8 +315869.93 6670.0 – C57
2020-12-27 02:54:08 S 06 56 22.114 -48 09 29.95 – V C57
2020-12-27 02:54:08 s 1 -162739.01 2 +315466.75 1330.0 – C57
2020-12-27 03:04:08 S 06 56 21.787 -48 09 54.58 – V C57
2020-12-27 03:04:08 s 1 -162966.73 0 +315062.57 5180.0 – C57
2020-12-27 03:24:08 S 06 56 20.664 -48 10 40.19 – V C57
2020-12-27 03:24:08 s 1 -163420.58 1 +314251.18 500.0 – C57
2020-12-27 03:34:08 S 06 56 20.186 -48 11 03.01 – V C57
2020-12-27 03:34:08 s 1 -163646.71 0 +313843.98 1940.0 – C57
2020-12-27 04:04:08 S 06 56 18.878 -48 12 15.77 – V C57
2020-12-27 04:04:08 s 1 -164321.88 9 +312616.33 1410.0 – C57
2020-12-27 04:14:08 S 06 56 18.257 -48 12 38.16 – V C57
2020-12-27 04:14:08 s 1 -164545.87 3 +312205.10 9600.0 – C57
2020-12-27 04:24:08 S 06 56 17.796 -48 13 00.73 – V C57
2020-12-27 04:24:08 s 1 -164769.31 7 +311792.85 6970.0 – C57
2020-12-27 04:34:08 S 06 56 17.443 -48 13 25.75 – V C57
2020-12-27 04:34:08 s 1 -164992.21 7 +311379.60 3510.0 – C57
2020-12-27 04:44:08 S 06 56 16.879 -48 13 48.79 – V C57
2020-12-27 04:44:08 s 1 -165214.57 3 +310965.33 9230.0 – C57
2020-12-27 04:54:08 S 06 56 16.301 -48 14 12.59 – V C57
2020-12-27 04:54:08 s 1 -165436.38 1 +310550.05 4120.0 – C57
2020-12-27 05:04:08 S 06 56 15.821 -48 14 35.38 – V C57
2020-12-27 05:04:08 s 1 -165657.64 2 +310133.75 8180.0 – C57
2020-12-27 05:14:08 S 06 56 15.322 -48 15 00.90 – V C57
2020-12-27 05:14:08 s 1 -165878.35 1 +309716.44 1400.0 – C57
2020-12-27 05:24:08 S 06 56 14.911 -48 15 23.62 – V C57
2020-12-27 05:24:08 s 1 -166098.50 8 +309298.11 3780.0 – C57
2020-12-27 05:34:08 S 06 56 14.273 -48 15 46.37 – V C57
2020-12-27 05:34:08 s 1 -166318.11 1 +308878.77 5320.0 – C57
2020-12-27 05:44:08 S 06 56 13.778 -48 16 10.02 – V C57
2020-12-27 05:44:08 s 1 -166537.15 7 +308458.41 6020.0 – C57
2020-12-27 05:54:08 S 06 56 13.459 -48 16 33.82 – V C57
2020-12-27 05:54:08 s 1 -166755.64 4 +308037.03 5870.0 – C57
2020-12-27 06:04:08 S 06 56 13.030 -48 16 57.72 – V C57
2020-12-27 06:04:08 s 1 -166973.57 1 +307614.63 4880.0 – C57
2020-12-27 06:14:08 S 06 56 12.336 -48 17 21.62 – V C57
2020-12-27 06:14:08 s 1 -167190.93 5 +307191.21 3030.0 – 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)