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
2021-01-18 10:44:08 s 1 +46027.571 0 +365567.54 100.0 – C57
2021-01-18 10:54:08 S 06 20 06.605 -67 02 44.77 – V C57
2021-01-18 10:54:08 s 1 +45689.941 0 +365801.45 2920.0 – C57
2021-01-18 11:04:08 S 06 20 05.184 -67 03 02.77 – V C57
2021-01-18 11:04:08 s 1 +45352.168 0 +366034.32 5470.0 – C57
2021-01-18 11:14:08 S 06 20 03.955 -67 03 22.07 – V C57
2021-01-18 11:14:08 s 1 +45014.253 0 +366266.14 7760.0 – C57
2021-01-18 11:24:08 S 06 20 02.885 -67 03 41.58 – V C57
2021-01-18 11:24:08 s 1 +44676.198 0 +366496.91 9790.0 – C57
2021-01-18 11:34:08 S 06 20 01.543 -67 04 00.59 – V C57
2021-01-18 11:34:08 s 1 +44338.003 0 +366726.64 1560.0 – C57
2021-01-18 11:44:08 S 06 20 00.137 -67 04 19.78 – V C57
2021-01-18 11:44:08 s 1 +43999.669 0 +366955.32 3070.0 – C57
2021-01-18 11:54:08 S 06 19 58.752 -67 04 37.70 – V C57
2021-01-18 11:54:08 s 1 +43661.198 0 +367182.96 4330.0 – C57
2021-01-18 12:04:08 S 06 19 57.494 -67 04 55.96 – V C57
2021-01-18 12:04:08 s 1 +43322.591 0 +367409.56 5340.0 – C57
2021-01-18 12:14:08 S 06 19 56.330 -67 05 15.83 – V C57
2021-01-18 12:14:08 s 1 +42983.849 0 +367635.11 6090.0 – C57
2021-01-18 12:24:08 S 06 19 55.109 -67 05 34.98 – V C57
2021-01-18 12:24:08 s 1 +42644.974 0 +367859.63 6600.0 – C57
2021-01-18 12:34:08 S 06 19 53.741 -67 05 53.38 – V C57
2021-01-18 12:34:08 s 1 +42305.965 0 +368083.10 6850.0 – C57
2021-01-18 12:38:10 C 06 19 14.19 -66 48 56.4 16.1 q Q68
2021-01-18 12:40:23 C 06 19 13.90 -66 49 00.4 15.3 q Q68
2021-01-18 12:42:36 C 06 19 13.79 -66 49 04.2 15.3 q Q68
2021-01-18 12:44:08 S 06 19 52.478 -67 06 12.13 – V C57
2021-01-18 12:44:08 s 1 +41966.826 0 +368305.53 6870.0 – C57
2021-01-18 12:44:49 C 06 19 13.28 -66 49 07.8 15.0 q Q68
2021-01-18 12:54:08 S 06 19 51.163 -67 06 30.96 – V C57
2021-01-18 12:54:08 s 1 +41627.555 0 +368526.93 6640.0 – C57
2021-01-18 13:04:08 S 06 19 49.882 -67 06 49.61 – V C57
2021-01-18 13:04:08 s 1 +41288.156 0 +368747.29 6160.0 – C57
2021-01-18 13:14:08 S 06 19 48.809 -67 07 08.94 – V C57
2021-01-18 13:14:08 s 1 +40948.628 0 +368966.61 5450.0 – C57
2021-01-18 13:24:08 S 06 19 47.484 -67 07 28.74 – V C57
2021-01-18 13:24:08 s 1 +40608.973 0 +369184.89 4510.0 – C57
2021-01-18 13:34:08 S 06 19 46.229 -67 07 46.24 – V C57
2021-01-18 13:34:08 s 1 +40269.193 0 +369402.14 3320.0 – C57
2021-01-18 13:44:08 S 06 19 44.719 -67 08 05.50 – V C57
2021-01-18 13:44:08 s 1 +39929.287 0 +369618.36 1900.0 – C57
2021-01-18 13:54:08 S 06 19 43.462 -67 08 24.76 – V C57
2021-01-18 13:54:08 s 1 +39589.258 0 +369833.54 260.0 – C57
2021-01-18 14:04:08 S 06 19 42.346 -67 08 43.55 – V C57
2021-01-18 14:04:08 s 1 +39249.106 0 +370047.69 8380.0 – C57
2021-01-18 14:14:08 S 06 19 41.136 -67 09 02.48 – V C57
2021-01-18 14:14:08 s 1 +38908.833 0 +370260.81 6270.0 – C57
2021-01-18 14:24:08 S 06 19 39.833 -67 09 21.85 – V C57
2021-01-18 14:24:08 s 1 +38568.440 0 +370472.90 3940.0 – C57
2021-01-18 14:34:08 S 06 19 38.347 -67 09 40.36 – 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)