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
2018-11-27 03:44:39 s 1 -154414.78 8 +24781.307 1390.0 – C57
2018-11-27 04:14:39 S 04 15 32.966 -04 34 41.27 – V C57
2018-11-27 04:14:39 s 1 -153078.23 9 +22109.581 7520.0 – C57
2018-11-27 04:44:39 S 04 15 31.073 -04 35 28.14 – V C57
2018-11-27 04:44:39 s 1 -151705.99 1 +19432.686 2800.0 – C57
2018-11-27 05:14:39 S 04 15 29.220 -04 36 16.63 – V C57
2018-11-27 05:14:39 s 1 -150297.30 9 +16751.109 2360.0 – C57
2018-11-27 05:44:39 S 04 15 27.242 -04 37 02.17 – V C57
2018-11-27 05:44:39 s 1 -148851.44 1 +14065.374 1190.0 – C57
2018-11-27 06:14:39 S 04 15 25.370 -04 37 48.40 – V C57
2018-11-27 06:14:39 s 1 -147367.61 6 +11376.035 4130.0 – C57
2018-11-27 06:44:39 S 04 15 23.419 -04 38 36.06 – V C57
2018-11-27 06:44:39 s 1 -145845.04 7 + 8683.688 5870.0 – C57
2018-11-27 07:14:39 S 04 15 21.511 -04 39 22.25 – V C57
2018-11-27 07:14:39 s 1 -144282.92 6 + 5988.968 940.0 – C57
2018-11-27 07:44:39 S 04 15 19.594 -04 40 10.60 – V C57
2018-11-27 07:44:39 s 1 -142680.42 9 + 3292.553 3720.0 – C57
2018-11-27 08:14:39 S 04 15 17.791 -04 40 55.96 – V C57
2018-11-27 08:14:39 s 1 -141036.71 4 + 595.167 8410.0 – C57
2018-11-27 08:44:39 S 04 15 15.814 -04 41 43.19 – V C57
2018-11-27 08:44:39 s 1 -139350.92 1 - 2102.418 9090.0 – C57
2018-11-27 09:44:39 S 04 15 12.062 -04 43 18.12 – V C57
2018-11-27 09:44:39 s 1 -135849.57 7 - 7494.829 3730.0 – C57
2018-11-27 10:14:39 S 04 15 10.166 -04 44 05.50 – V C57
2018-11-27 10:14:39 s 1 -134032.22 2 -10187.835 4970.0 – C57
2018-11-27 10:44:39 S 04 15 08.282 -04 44 51.90 – V C57
2018-11-27 10:44:39 s 1 -132169.18 3 -12877.393 6740.0 – C57
2018-11-27 11:14:39 S 04 15 06.430 -04 45 39.89 – V C57
2018-11-27 11:14:39 s 1 -130259.52 0 -15562.435 2240.0 – C57
2018-11-27 11:44:39 S 04 15 04.718 -04 46 25.36 – V C57
2018-11-27 11:44:39 s 1 -128302.28 2 -18241.818 4550.0 – C57
2018-11-27 12:14:39 S 04 15 02.731 -04 47 13.27 – V C57
2018-11-27 12:14:39 s 1 -126296.50 4 -20914.326 6540.0 – C57
2018-11-27 13:14:39 S 04 14 58.999 -04 48 46.80 – V C57
2018-11-27 13:14:39 s 1 -122135.42 8 -26233.444 380.0 – C57
2018-11-27 13:44:39 S 04 14 57.175 -04 49 36.37 – V C57
2018-11-27 13:44:39 s 1 -119978.16 1 -28877.197 7270.0 – C57
2018-11-28 08:44:09 C 04 13 43.29 -05 21 40.2 – V 703
2018-11-28 08:51:51 C 04 13 42.66 -05 21 51.8 – V 703
2018-11-28 08:59:33 C 04 13 42.03 -05 22 03.4 – V 703
2018-11-28 09:07:15 C 04 13 41.43 -05 22 15.3 – V 703
2018-11-28 11:24:18 C 04 13 30.98 -05 25 41.6 – U T05
2018-11-28 11:38:48 C 04 13 29.82 -05 26 03.7 – U T05
2018-11-28 11:53:14 C 04 13 28.65 -05 26 25.6 – U T05
2018-11-28 12:07:46 C 04 13 27.48 -05 26 47.7 – U T05
2018-11-29 03:14:39 S 04 12 33.746 -05 52 07.43 – V C57
2018-11-29 03:14:39 s 1 +114795.97 6 -14559.975 2730.0 – C57
2018-11-29 03:44:39 S 04 12 31.450 -05 52 56.78 – V C57
2018-11-29 03:44:39 s 1 +116405.83 9 -11457.135 8640.0 – C57
2018-11-29 04:14:39 S 04 12 29.026 -05 53 48.80 – 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)