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
2021-01-23 20:04:07 S 06 01 13.517 -70 45 15.08 – V C57
2021-01-23 20:04:07 s 1 -186848.25 1 +261235.86 6390.0 – C57
2021-01-23 20:14:07 S 06 01 12.002 -70 45 30.13 – V C57
2021-01-23 20:14:07 s 1 -187004.04 4 +260724.03 9550.0 – C57
2021-01-23 20:24:07 S 06 01 10.481 -70 45 47.45 – V C57
2021-01-23 20:24:07 s 1 -187159.03 5 +260211.08 1320.0 – C57
2021-01-23 20:34:07 S 06 01 08.918 -70 46 03.04 – V C57
2021-01-23 20:34:07 s 1 -187313.22 1 +259697.02 1690.0 – C57
2021-01-23 20:44:07 S 06 01 07.351 -70 46 16.68 – V C57
2021-01-23 20:44:07 s 1 -187466.60 0 +259181.85 660.0 – C57
2021-01-23 20:54:07 S 06 01 05.952 -70 46 33.10 – V C57
2021-01-23 20:54:07 s 1 -187619.16 8 +258665.55 8220.0 – C57
2021-01-23 21:04:07 S 06 01 03.758 -70 46 48.36 – V C57
2021-01-23 21:04:07 s 1 -187770.92 1 +258148.14 4370.0 – C57
2021-01-23 21:14:07 S 06 01 02.314 -70 47 02.80 – V C57
2021-01-23 21:14:07 s 1 -187921.85 7 +257629.61 9110.0 – C57
2021-01-23 21:24:07 S 06 01 00.662 -70 47 16.80 – V C57
2021-01-23 21:24:07 s 1 -188071.97 3 +257109.96 2420.0 – C57
2021-01-23 21:34:07 S 06 00 59.479 -70 47 34.48 – V C57
2021-01-23 21:34:07 s 1 -188221.26 6 +256589.18 4300.0 – C57
2021-01-23 21:44:07 S 06 00 57.938 -70 47 49.38 – V C57
2021-01-23 21:44:07 s 1 -188369.73 1 +256067.28 4750.0 – C57
2021-01-23 22:04:07 S 06 00 54.379 -70 48 20.41 – V C57
2021-01-23 22:04:07 s 1 -188664.16 9 +255020.11 1320.0 – C57
2021-01-23 22:14:07 S 06 00 52.802 -70 48 38.12 – V C57
2021-01-23 22:14:07 s 1 -188810.13 4 +254494.83 7430.0 – C57
2021-01-23 22:24:07 S 06 00 51.199 -70 48 51.95 – V C57
2021-01-23 22:24:07 s 1 -188955.26 0 +253968.43 2090.0 – C57
2021-01-23 22:34:07 S 06 00 49.697 -70 49 06.24 – V C57
2021-01-23 22:34:07 s 1 -189099.54 3 +253440.90 5280.0 – C57
2021-01-23 22:44:07 S 06 00 48.262 -70 49 23.02 – V C57
2021-01-23 22:44:07 s 1 -189242.97 9 +252912.23 7000.0 – C57
2021-01-23 22:54:07 S 06 00 46.728 -70 49 40.19 – V C57
2021-01-23 22:54:07 s 1 -189385.56 6 +252382.44 7250.0 – C57
2021-01-23 23:04:07 S 06 00 44.974 -70 49 54.88 – V C57
2021-01-23 23:04:07 s 1 -189527.29 9 +251851.51 6010.0 – C57
2021-01-23 23:14:07 S 06 00 43.447 -70 50 09.67 – V C57
2021-01-23 23:14:07 s 1 -189668.17 7 +251319.45 3290.0 – C57
2021-01-23 23:24:07 S 06 00 41.784 -70 50 25.12 – V C57
2021-01-23 23:24:07 s 1 -189808.19 4 +250786.26 9080.0 – C57
2021-01-23 23:34:07 S 06 00 39.883 -70 50 39.44 – V C57
2021-01-23 23:34:07 s 1 -189947.34 8 +250251.92 3360.0 – C57
2021-01-23 23:44:07 S 06 00 38.270 -70 50 55.54 – V C57
2021-01-23 23:44:07 s 1 -190085.63 6 +249716.45 6140.0 – C57
2021-01-23 23:54:07 S 06 00 36.797 -70 51 11.12 – V C57
2021-01-23 23:54:07 s 1 -190223.05 3 +249179.85 7410.0 – C57
2021-01-24 00:04:07 S 06 00 35.443 -70 51 27.54 – V C57
2021-01-24 00:04:07 s 1 -190359.59 8 +248642.10 7160.0 – C57
2021-01-24 00:14:07 S 06 00 33.586 -70 51 41.94 – V C57
2021-01-24 00:14:07 s 1 -190495.26 5 +248103.21 5390.0 – 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)