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
2018-12-03 10:14:39 s 1 +26069.944 0 +361786.24 7440.0 – C57
2018-12-03 10:44:39 S 04 03 44.107 -08 27 12.78 – V C57
2018-12-03 10:44:39 s 1 +25075.697 0 +362407.67 390.0 – C57
2018-12-03 11:14:39 S 04 03 41.522 -08 27 55.33 – V C57
2018-12-03 11:14:39 s 1 +24080.920 0 +363019.79 8530.0 – C57
2018-12-03 11:44:39 S 04 03 38.846 -08 28 36.98 – V C57
2018-12-03 11:44:39 s 1 +23085.639 0 +363622.63 2070.0 – C57
2018-12-03 12:14:39 S 04 03 36.396 -08 29 19.28 – V C57
2018-12-03 12:14:39 s 1 +22089.884 0 +364216.21 1190.0 – C57
2018-12-03 12:44:39 S 04 03 33.694 -08 30 02.16 – V C57
2018-12-03 12:44:39 s 1 +21093.682 0 +364800.54 6070.0 – C57
2018-12-03 13:14:39 S 04 03 31.164 -08 30 44.21 – V C57
2018-12-03 13:14:39 s 1 +20097.059 0 +365375.64 6900.0 – C57
2018-12-03 13:44:39 S 04 03 28.630 -08 31 26.98 – V C57
2018-12-03 13:44:39 s 1 +19100.044 0 +365941.53 3880.0 – C57
2018-12-03 14:14:39 S 04 03 25.934 -08 32 09.67 – V C57
2018-12-03 14:14:39 s 1 +18102.664 0 +366498.24 7170.0 – C57
2018-12-03 14:44:39 S 04 03 23.458 -08 32 51.65 – V C57
2018-12-03 14:44:39 s 1 +17104.945 0 +367045.77 6960.0 – C57
2018-12-03 15:14:39 S 04 03 20.839 -08 33 33.12 – V C57
2018-12-03 15:14:39 s 1 +16106.914 0 +367584.15 3430.0 – C57
2018-12-03 15:44:39 S 04 03 18.221 -08 34 15.60 – V C57
2018-12-03 15:44:39 s 1 +15108.597 0 +368113.38 6760.0 – C57
2018-12-03 16:14:39 S 04 03 15.749 -08 34 56.89 – V C57
2018-12-03 16:14:39 s 1 +14110.022 0 +368633.50 7130.0 – C57
2018-12-03 16:44:39 S 04 03 13.121 -08 35 40.99 – V C57
2018-12-03 16:44:39 s 1 +13111.213 0 +369144.52 4710.0 – C57
2018-12-03 17:14:39 S 04 03 10.622 -08 36 21.42 – V C57
2018-12-03 17:14:39 s 1 +12112.197 0 +369646.45 9680.0 – C57
2018-12-03 17:44:39 S 04 03 07.999 -08 37 04.01 – V C57
2018-12-03 17:44:39 s 1 +11112.999 0 +370139.31 2200.0 – C57
2018-12-03 18:14:39 S 04 03 05.402 -08 37 46.70 – V C57
2018-12-03 18:14:39 s 1 +10113.646 0 +370623.11 2460.0 – C57
2018-12-03 18:44:39 S 04 03 02.842 -08 38 28.14 – V C57
2018-12-03 19:14:39 S 04 03 00.262 -08 39 10.76 – V C57
2018-12-03 19:44:39 S 04 02 57.684 -08 39 53.21 – V C57
2018-12-03 20:14:39 S 04 02 55.135 -08 40 34.79 – V C57
2018-12-03 20:44:39 S 04 02 52.531 -08 41 17.45 – V C57
2018-12-03 21:14:39 S 04 02 49.891 -08 41 59.42 – V C57
2018-12-03 21:44:39 S 04 02 47.412 -08 42 41.00 – V C57
2018-12-03 22:14:39 S 04 02 44.894 -08 43 24.31 – V C57
2018-12-03 22:44:39 S 04 02 42.302 -08 44 03.16 – V C57
2018-12-03 23:14:39 S 04 02 39.662 -08 44 48.05 – V C57
2018-12-03 23:44:39 S 04 02 37.085 -08 45 30.10 – V C57
2018-12-04 00:14:39 S 04 02 34.613 -08 46 10.96 – V C57
2018-12-04 00:44:39 S 04 02 32.009 -08 46 53.18 – V C57
2018-12-04 01:14:39 S 04 02 29.429 -08 47 34.51 – V C57
2018-12-04 01:44:39 S 04 02 26.822 -08 48 16.85 – V C57
2018-12-04 02:14:39 S 04 02 24.310 -08 48 58.36 – V C57
2018-12-04 02:44:39 S 04 02 21.679 -08 49 41.05 – 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)