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
2021-01-11 00:44:08 s 1 -190172.15 3 +231923.90 6640.0 – C57
2021-01-11 00:54:08 S 06 34 59.978 -61 20 31.85 – V C57
2021-01-11 00:54:08 s 1 -190269.46 9 +231339.43 3060.0 – C57
2021-01-11 01:04:08 S 06 34 59.158 -61 20 50.50 – V C57
2021-01-11 01:04:08 s 1 -190365.78 6 +230753.76 7830.0 – C57
2021-01-11 01:14:08 S 06 34 58.301 -61 21 08.82 – V C57
2021-01-11 01:14:08 s 1 -190461.10 0 +230166.89 950.0 – C57
2021-01-11 01:24:08 S 06 34 57.338 -61 21 26.96 – V C57
2021-01-11 01:24:08 s 1 -190555.40 5 +229578.82 2400.0 – C57
2021-01-11 01:34:08 S 06 34 56.410 -61 21 45.72 – V C57
2021-01-11 01:34:08 s 1 -190648.69 9 +228989.55 2190.0 – C57
2021-01-11 01:44:08 S 06 34 55.726 -61 22 03.97 – V C57
2021-01-11 01:44:08 s 1 -190740.97 6 +228399.06 300.0 – C57
2021-01-11 01:54:08 S 06 34 54.864 -61 22 21.83 – V C57
2021-01-11 01:54:08 s 1 -190832.23 1 +227807.38 6730.0 – C57
2021-01-11 02:04:08 S 06 34 53.772 -61 22 40.01 – V C57
2021-01-11 02:04:08 s 1 -190922.46 1 +227214.48 1470.0 – C57
2021-01-11 02:14:08 S 06 34 52.956 -61 22 59.63 – V C57
2021-01-11 02:14:08 s 1 -191011.66 1 +226620.38 4500.0 – C57
2021-01-11 02:24:08 S 06 34 52.078 -61 23 17.63 – V C57
2021-01-11 02:24:08 s 1 -191099.82 6 +226025.06 5830.0 – C57
2021-01-11 02:34:08 S 06 34 51.161 -61 23 35.88 – V C57
2021-01-11 02:34:08 s 1 -191186.95 2 +225428.53 5440.0 – C57
2021-01-11 02:44:08 S 06 34 50.208 -61 23 54.92 – V C57
2021-01-11 02:44:08 s 1 -191273.03 4 +224830.78 3330.0 – C57
2021-01-11 02:54:08 S 06 34 49.332 -61 24 12.67 – V C57
2021-01-11 02:54:08 s 1 -191358.06 7 +224231.82 9490.0 – C57
2021-01-11 03:04:08 S 06 34 48.427 -61 24 30.67 – V C57
2021-01-11 03:04:08 s 1 -191442.04 7 +223631.64 3900.0 – C57
2021-01-11 03:14:08 S 06 34 47.508 -61 24 49.57 – V C57
2021-01-11 03:14:08 s 1 -191524.97 0 +223030.24 6570.0 – C57
2021-01-11 03:24:08 S 06 34 46.716 -61 25 08.11 – V C57
2021-01-11 03:24:08 s 1 -191606.82 9 +222427.62 7490.0 – C57
2021-01-11 03:34:08 S 06 34 45.862 -61 25 26.44 – V C57
2021-01-11 03:34:08 s 1 -191687.62 1 +221823.78 6640.0 – C57
2021-01-11 03:44:08 S 06 34 44.801 -61 25 44.62 – V C57
2021-01-11 03:44:08 s 1 -191767.34 1 +221218.71 4010.0 – C57
2021-01-11 03:54:08 S 06 34 43.992 -61 26 03.16 – V C57
2021-01-11 03:54:08 s 1 -191845.98 4 +220612.41 9610.0 – C57
2021-01-11 04:04:08 S 06 34 43.138 -61 26 21.95 – V C57
2021-01-11 04:04:08 s 1 -191923.54 6 +220004.89 3420.0 – C57
2021-01-11 04:14:08 S 06 34 42.276 -61 26 40.38 – V C57
2021-01-11 04:14:08 s 1 -192000.02 0 +219396.13 5430.0 – C57
2021-01-11 04:24:08 S 06 34 41.256 -61 26 58.31 – V C57
2021-01-11 04:24:08 s 1 -192075.40 3 +218786.15 5630.0 – C57
2021-01-11 04:34:08 S 06 34 40.464 -61 27 16.45 – V C57
2021-01-11 04:34:08 s 1 -192149.68 9 +218174.93 4020.0 – C57
2021-01-11 04:44:08 S 06 34 39.749 -61 27 34.56 – V C57
2021-01-11 04:44:08 s 1 -192222.87 3 +217562.47 590.0 – C57
2021-01-11 04:54:08 S 06 34 38.590 -61 27 53.06 – 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)