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
2021-07-06 05:14:00 S 19 14 11.201 +37 13 00.05 V C57
2021-07-06 05:14:00 s 1 -202565.85 3 +207493.48 520.0 C57
2021-07-06 05:24:00 S 19 14 10.303 +37 12 56.34 V C57
2021-07-06 05:24:00 s 1 -202656.06 5 +206869.32 2440.0 C57
2021-07-06 05:34:00 S 19 14 09.617 +37 12 56.74 V C57
2021-07-06 05:34:00 s 1 -202745.15 7 +206244.01 860.0 C57
2021-07-06 06:14:00 S 19 14 06.701 +37 12 50.11 V C57
2021-07-06 06:14:00 s 1 -203090.23 0 +203731.41 9360.0 C57
2021-07-06 06:24:00 S 19 14 05.938 +37 12 46.01 V C57
2021-07-06 06:24:00 s 1 -203173.65 0 +203100.41 110.0 C57
2021-07-06 06:34:00 S 19 14 05.467 +37 12 44.17 V C57
2021-07-06 06:34:00 s 1 -203255.92 2 +202468.26 7290.0 C57
2021-07-06 06:44:00 S 19 14 04.908 +37 12 41.76 V C57
2021-07-06 06:44:00 s 1 -203337.04 0 +201834.97 870.0 C57
2021-07-06 06:54:00 S 19 14 03.564 +37 12 40.39 V C57
2021-07-06 06:54:00 s 1 -203416.99 9 +201200.54 850.0 C57
2021-07-06 08:44:00 S 19 13 56.006 +37 12 23.72 V C57
2021-07-06 08:44:00 s 1 -204218.65 2 +194145.98 8290.0 C57
2021-07-06 09:04:00 S 19 13 54.427 +37 12 19.58 V C57
2021-07-06 09:04:00 s 1 -204348.75 3 +192848.35 5530.0 C57
2021-07-06 09:14:00 S 19 13 53.882 +37 12 15.55 V C57
2021-07-06 09:14:00 s 1 -204411.96 0 +192197.81 3430.0 C57
2021-07-06 09:24:00 S 19 13 53.153 +37 12 14.87 V C57
2021-07-06 09:24:00 s 1 -204473.93 1 +191546.11 7490.0 C57
2021-07-06 09:34:00 S 19 13 52.778 +37 12 12.71 V C57
2021-07-06 09:34:00 s 1 -204534.66 2 +190893.25 7690.0 C57
2021-07-06 09:44:00 S 19 13 51.593 +37 12 13.36 V C57
2021-07-06 09:44:00 s 1 -204594.14 5 +190239.24 4030.0 C57
2021-07-06 09:54:00 S 19 13 51.079 +37 12 09.43 V C57
2021-07-06 09:54:00 s 1 -204652.37 7 +189584.06 6470.0 C57
2021-07-06 10:04:00 S 19 13 50.323 +37 12 07.06 V C57
2021-07-06 10:04:00 s 1 -204709.35 1 +188927.73 5020.0 C57
2021-07-06 10:14:00 S 19 13 49.745 +37 12 04.57 V C57
2021-07-06 10:14:00 s 1 -204765.06 1 +188270.23 9650.0 C57
2021-07-06 10:24:00 S 19 13 49.054 +37 12 03.02 V C57
2021-07-06 10:24:00 s 1 -204819.50 3 +187611.58 340.0 C57
2021-07-06 10:34:00 S 19 13 48.372 +37 12 02.52 V C57
2021-07-06 10:34:00 s 1 -204872.67 1 +186951.76 7080.0 C57
2021-07-06 10:44:00 S 19 13 47.609 +37 12 03.46 V C57
2021-07-06 10:44:00 s 1 -204924.55 9 +186290.78 9850.0 C57
2021-07-06 10:54:00 S 19 13 46.913 +37 11 57.91 V C57
2021-07-06 10:54:00 s 1 -204975.16 1 +185628.64 8630.0 C57
2021-07-06 11:04:00 S 19 13 46.126 +37 11 57.12 V C57
2021-07-06 11:04:00 s 1 -205024.47 2 +184965.33 3410.0 C57
2021-07-06 11:14:00 S 19 13 45.386 +37 11 55.18 V C57
2021-07-06 11:14:00 s 1 -205072.48 6 +184300.86 4180.0 C57
2021-07-06 11:24:00 S 19 13 44.897 +37 11 52.73 V C57
2021-07-06 11:24:00 s 1 -205119.19 7 +183635.22 900.0 C57
2021-07-06 11:34:00 S 19 13 44.009 +37 11 52.48 V C57
2021-07-06 11:34:00 s 1 -205164.59 9 +182968.42 3570.0 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)