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
2021-01-15 12:24:08 s 1 +149977.52 7 +153201.73 6560.0 – C57
2021-01-15 12:44:08 S 06 27 59.182 -64 42 23.98 – V C57
2021-01-15 12:44:08 s 1 +149898.92 3 +154894.15 7540.0 – C57
2021-01-15 12:54:08 S 06 27 57.986 -64 42 44.78 – V C57
2021-01-15 12:54:08 s 1 +149856.44 6 +155737.10 2590.0 – C57
2021-01-15 13:04:08 S 06 27 57.247 -64 43 07.54 – V C57
2021-01-15 13:04:08 s 1 +149811.87 4 +156577.87 4050.0 – C57
2021-01-15 13:14:08 S 06 27 56.347 -64 43 28.74 – V C57
2021-01-15 13:14:08 s 1 +149765.22 4 +157416.47 1950.0 – C57
2021-01-15 13:34:08 S 06 27 54.554 -64 44 10.18 – V C57
2021-01-15 13:34:08 s 1 +149665.76 0 +159087.21 7190.0 – C57
2021-01-15 13:54:08 S 06 27 52.702 -64 44 51.86 – V C57
2021-01-15 13:54:08 s 1 +149558.18 5 +160749.33 8540.0 – C57
2021-01-15 13:59:47 C 06 26 30.38 -64 39 08.1 – q Q68
2021-01-15 14:01:59 C 06 26 30.13 -64 39 12.1 – q Q68
2021-01-15 14:04:08 S 06 27 51.785 -64 45 13.72 – V C57
2021-01-15 14:04:08 s 1 +149501.39 6 +161577.19 9060.0 – C57
2021-01-15 14:04:11 C 06 26 29.88 -64 39 16.2 – q Q68
2021-01-15 14:06:23 C 06 26 29.65 -64 39 20.4 – q Q68
2021-01-15 14:34:08 S 06 27 49.003 -64 46 17.36 – V C57
2021-01-15 14:34:08 s 1 +149319.21 4 +164047.96 400.0 – C57
2021-01-15 14:44:08 S 06 27 48.007 -64 46 37.92 – V C57
2021-01-15 14:44:08 s 1 +149254.60 0 +164867.30 7510.0 – C57
2021-01-15 14:47:40 C 06 26 25.27 -64 40 36.3 – q Q68
2021-01-15 14:49:56 C 06 26 25.03 -64 40 40.4 – q Q68
2021-01-15 14:52:57 C 06 26 24.68 -64 40 46.0 – q Q68
2021-01-15 14:55:12 C 06 26 24.44 -64 40 50.4 – q Q68
2021-01-15 15:04:08 S 06 27 46.334 -64 47 20.11 – V C57
2021-01-15 15:04:08 s 1 +149119.63 2 +166499.66 1910.0 – C57
2021-01-15 15:14:08 S 06 27 45.127 -64 47 41.42 – V C57
2021-01-15 15:14:08 s 1 +149049.30 9 +167312.69 9230.0 – C57
2021-01-15 15:24:08 S 06 27 44.242 -64 48 02.09 – V C57
2021-01-15 15:24:08 s 1 +148977.11 1 +168123.61 3350.0 – C57
2021-01-15 15:44:08 S 06 27 42.451 -64 48 43.92 – V C57
2021-01-15 15:44:08 s 1 +148827.15 5 +169739.19 2040.0 – C57
2021-01-15 15:54:08 S 06 27 41.482 -64 49 05.30 – V C57
2021-01-15 15:54:08 s 1 +148749.42 4 +170543.86 6670.0 – C57
2021-01-15 16:14:08 S 06 27 39.708 -64 49 47.75 – V C57
2021-01-15 16:14:08 s 1 +148588.52 7 +172146.96 6600.0 – C57
2021-01-15 16:24:08 S 06 27 38.755 -64 50 09.53 – V C57
2021-01-15 16:24:08 s 1 +148505.38 9 +172945.41 1960.0 – C57
2021-01-15 16:34:08 S 06 27 37.687 -64 50 30.12 – V C57
2021-01-15 16:34:08 s 1 +148420.47 5 +173741.81 4270.0 – C57
2021-01-15 16:44:08 S 06 27 36.797 -64 50 50.82 – V C57
2021-01-15 16:44:08 s 1 +148333.80 1 +174536.14 3550.0 – C57
2021-01-15 16:54:08 S 06 27 35.978 -64 51 12.38 – V C57
2021-01-15 16:54:08 s 1 +148245.37 8 +175328.43 9840.0 – C57
2021-01-15 17:04:08 S 06 27 35.002 -64 51 33.91 – V C57
2021-01-15 17:04:08 s 1 +148155.22 0 +176118.67 3160.0 – C57
2021-01-15 17:24:08 S 06 27 33.026 -64 52 15.10 – 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)