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
2021-01-08 12:04:08 s 1 -111172.70 5 +374741.81 8770.0 – C57
2021-01-08 16:54:08 S 06 39 57.494 -59 31 52.57 – V C57
2021-01-08 16:54:08 s 1 -119608.74 0 +368005.32 7840.0 – C57
2021-01-08 17:04:08 S 06 39 56.642 -59 32 13.09 – V C57
2021-01-08 17:04:08 s 1 -119895.28 9 +367759.69 6400.0 – C57
2021-01-08 17:14:08 S 06 39 55.896 -59 32 33.36 – V C57
2021-01-08 17:14:08 s 1 -120181.53 9 +367513.15 4500.0 – C57
2021-01-08 17:24:08 S 06 39 54.948 -59 32 53.45 – V C57
2021-01-08 17:24:08 s 1 -120467.48 7 +367265.73 2150.0 – C57
2021-01-08 17:34:08 S 06 39 54.089 -59 33 13.86 – V C57
2021-01-08 17:34:08 s 1 -120753.13 3 +367017.41 9340.0 – C57
2021-01-08 17:44:08 S 06 39 53.294 -59 33 34.60 – V C57
2021-01-08 17:44:08 s 1 -121038.47 6 +366768.20 6060.0 – C57
2021-01-08 17:54:08 S 06 39 52.435 -59 33 54.14 – V C57
2021-01-08 17:54:08 s 1 -121323.51 4 +366518.09 2320.0 – C57
2021-01-08 18:04:08 S 06 39 51.362 -59 34 14.77 – V C57
2021-01-08 18:04:08 s 1 -121608.24 7 +366267.09 8120.0 – C57
2021-01-08 18:14:08 S 06 39 50.611 -59 34 34.97 – V C57
2021-01-08 18:14:08 s 1 -121892.67 4 +366015.19 3460.0 – C57
2021-01-08 18:24:08 S 06 39 49.819 -59 34 55.49 – V C57
2021-01-08 18:24:08 s 1 -122176.79 3 +365762.39 8320.0 – C57
2021-01-08 18:34:08 S 06 39 48.874 -59 35 15.54 – V C57
2021-01-08 18:34:08 s 1 -122460.60 3 +365508.70 2720.0 – C57
2021-01-08 18:44:08 S 06 39 48.046 -59 35 34.73 – V C57
2021-01-08 18:44:08 s 1 -122744.10 4 +365254.11 6650.0 – C57
2021-01-08 18:54:08 S 06 39 47.280 -59 35 55.68 – V C57
2021-01-08 18:54:08 s 1 -123027.29 4 +364998.63 100.0 – C57
2021-01-08 19:04:08 S 06 39 46.291 -59 36 15.34 – V C57
2021-01-08 19:04:08 s 1 -123310.17 2 +364742.24 3080.0 – C57
2021-01-08 19:14:08 S 06 39 45.456 -59 36 36.04 – V C57
2021-01-08 19:14:08 s 1 -123592.73 8 +364484.96 5580.0 – C57
2021-01-08 19:24:08 S 06 39 44.676 -59 36 55.15 – V C57
2021-01-08 19:24:08 s 1 -123874.99 0 +364226.78 7600.0 – C57
2021-01-08 19:34:08 S 06 39 43.678 -59 37 17.11 – V C57
2021-01-08 19:34:08 s 1 -124156.92 7 +363967.70 9150.0 – C57
2021-01-08 19:44:08 S 06 39 42.883 -59 37 36.88 – V C57
2021-01-08 19:44:08 s 1 -124438.54 8 +363707.72 210.0 – C57
2021-01-08 19:54:08 S 06 39 42.127 -59 37 57.40 – V C57
2021-01-08 19:54:08 s 1 -124719.85 2 +363446.84 790.0 – C57
2021-01-08 20:04:08 S 06 39 41.088 -59 38 16.98 – V C57
2021-01-08 20:04:08 s 1 -125000.83 8 +363185.06 890.0 – C57
2021-01-08 20:14:08 S 06 39 40.226 -59 38 37.25 – V C57
2021-01-08 20:14:08 s 1 -125281.50 5 +362922.38 500.0 – C57
2021-01-08 20:24:08 S 06 39 39.475 -59 38 57.73 – V C57
2021-01-08 20:24:08 s 1 -125561.85 2 +362658.80 9620.0 – C57
2021-01-08 20:34:08 S 06 39 38.489 -59 39 17.50 – V C57
2021-01-08 20:34:08 s 1 -125841.87 7 +362394.32 8250.0 – C57
2021-01-08 20:44:08 S 06 39 37.678 -59 39 37.94 – V C57
2021-01-08 20:44:08 s 1 -126121.58 0 +362128.93 6390.0 – C57
2021-01-08 20:54:08 S 06 39 36.888 -59 39 57.13 – 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)