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
2021-07-12 08:04:00 S 19 02 39.970 +36 25 27.12 V C57
2021-07-12 08:04:00 s 1 +159594.37 3 +255246.42 6540.0 C57
2021-07-12 08:14:00 S 19 02 39.660 +36 25 23.95 V C57
2021-07-12 08:14:00 s 1 +159381.46 0 +255812.87 7030.0 C57
2021-07-12 08:24:00 S 19 02 38.652 +36 25 22.58 V C57
2021-07-12 08:24:00 s 1 +159167.73 3 +256378.00 5320.0 C57
2021-07-12 08:34:00 S 19 02 38.431 +36 25 15.71 V C57
2021-07-12 08:34:00 s 1 +158953.19 6 +256941.83 1440.0 C57
2021-07-12 08:44:00 S 19 02 37.435 +36 25 09.70 V C57
2021-07-12 08:44:00 s 1 +158737.85 3 +257504.36 5390.0 C57
2021-07-12 08:54:00 S 19 02 36.977 +36 24 58.75 V C57
2021-07-12 08:54:00 s 1 +158521.70 8 +258065.58 7180.0 C57
2021-07-12 09:04:00 S 19 02 36.180 +36 24 51.91 V C57
2021-07-12 09:04:00 s 1 +158304.76 5 +258625.51 6820.0 C57
2021-07-12 09:14:00 S 19 02 35.842 +36 24 49.79 V C57
2021-07-12 09:14:00 s 1 +158087.02 7 +259184.13 4330.0 C57
2021-07-12 09:34:00 S 19 02 34.500 +36 24 42.70 V C57
2021-07-12 09:34:00 s 1 +157649.18 4 +260297.50 2990.0 C57
2021-07-12 09:54:00 S 19 02 32.863 +36 24 30.82 V C57
2021-07-12 09:54:00 s 1 +157208.20 8 +261405.69 3240.0 C57
2021-07-12 10:04:00 S 19 02 32.458 +36 24 24.05 V C57
2021-07-12 10:04:00 s 1 +156986.55 4 +261957.84 230.0 C57
2021-07-12 10:14:00 S 19 02 31.692 +36 24 22.10 V C57
2021-07-12 10:14:00 s 1 +156764.12 9 +262508.71 5160.0 C57
2021-07-12 10:24:00 S 19 02 31.135 +36 24 14.58 V C57
2021-07-12 10:24:00 s 1 +156540.93 5 +263058.30 8030.0 C57
2021-07-12 10:44:00 S 19 02 29.460 +36 24 05.22 V C57
2021-07-12 10:44:00 s 1 +156092.25 7 +264153.60 7620.0 C57
2021-07-12 11:54:00 S 19 02 25.126 +36 23 25.76 V C57
2021-07-12 11:54:00 s 1 +154498.21 3 +267946.88 2830.0 C57
2021-07-12 12:04:00 S 19 02 24.250 +36 23 21.88 V C57
2021-07-12 12:04:00 s 1 +154267.53 4 +268483.68 5660.0 C57
2021-07-12 12:14:00 S 19 02 23.834 +36 23 14.93 V C57
2021-07-12 12:14:00 s 1 +154036.12 5 +269019.21 6540.0 C57
2021-07-12 12:24:00 S 19 02 23.112 +36 23 12.19 V C57
2021-07-12 12:24:00 s 1 +153803.99 1 +269553.47 5480.0 C57
2021-07-12 12:34:00 S 19 02 22.639 +36 23 07.37 V C57
2021-07-12 12:34:00 s 1 +153571.13 5 +270086.47 2500.0 C57
2021-07-12 13:34:00 S 19 02 18.420 +36 22 33.78 V C57
2021-07-12 13:34:00 s 1 +152158.07 2 +273258.53 9770.0 C57
2021-07-12 13:44:00 S 19 02 17.938 +36 22 26.36 V C57
2021-07-12 13:44:00 s 1 +151920.25 1 +273782.70 3540.0 C57
2021-07-12 14:04:00 S 19 02 16.524 +36 22 16.50 V C57
2021-07-12 14:04:00 s 1 +151442.52 7 +274827.28 5560.0 C57
2021-07-12 16:14:00 S 19 02 07.932 +36 21 06.48 V C57
2021-07-12 16:14:00 s 1 +148271.26 0 +281495.63 3060.0 C57
2021-07-12 17:24:00 S 19 02 03.595 +36 20 28.68 V C57
2021-07-12 17:24:00 s 1 +146517.82 3 +284999.85 4060.0 C57
2021-07-12 17:34:00 S 19 02 03.084 +36 20 21.30 V C57
2021-07-12 17:34:00 s 1 +146264.79 8 +285495.56 7500.0 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)