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 23:34:08 s 1 -191867.45 9 +139955.46 6560.0 C57
2021-01-11 23:44:08 S 06 32 59.923 -62 01 41.92 V C57
2021-01-11 23:44:08 s 1 -191771.01 8 +139190.19 9370.0 C57
2021-01-11 23:54:08 S 06 32 59.114 -62 01 58.37 V C57
2021-01-11 23:54:08 s 1 -191672.56 7 +138423.46 8790.0 C57
2021-01-12 00:04:08 S 06 32 58.049 -62 02 16.08 V C57
2021-01-12 00:04:08 s 1 -191572.09 3 +137655.29 4790.0 C57
2021-01-12 00:14:08 S 06 32 57.418 -62 02 33.04 V C57
2021-01-12 00:14:08 s 1 -191469.58 4 +136885.67 7370.0 C57
2021-01-12 00:24:08 S 06 32 56.542 -62 02 51.90 V C57
2021-01-12 00:24:08 s 1 -191365.02 8 +136114.60 6490.0 C57
2021-01-12 00:34:08 S 06 32 55.740 -62 03 09.40 V C57
2021-01-12 00:34:08 s 1 -191258.41 2 +135342.07 2140.0 C57
2021-01-12 00:44:08 S 06 32 54.624 -62 03 25.99 V C57
2021-01-12 00:44:08 s 1 -191149.72 3 +134568.09 4290.0 C57
2021-01-12 00:54:08 S 06 32 53.942 -62 03 43.49 V C57
2021-01-12 00:54:08 s 1 -191038.94 8 +133792.66 2930.0 C57
2021-01-12 01:04:08 S 06 32 53.189 -62 04 01.49 V C57
2021-01-12 01:04:08 s 1 -190926.07 5 +133015.77 8020.0 C57
2021-01-12 01:14:08 S 06 32 52.322 -62 04 18.88 V C57
2021-01-12 01:14:08 s 1 -190811.09 0 +132237.42 9550.0 C57
2021-01-12 01:24:08 S 06 32 51.293 -62 04 36.05 V C57
2021-01-12 01:24:08 s 1 -190693.97 9 +131457.61 7490.0 C57
2021-01-12 01:34:08 S 06 32 50.539 -62 04 54.23 V C57
2021-01-12 01:34:08 s 1 -190574.73 1 +130676.33 1820.0 C57
2021-01-12 01:44:08 S 06 32 49.834 -62 05 10.46 V C57
2021-01-12 01:44:08 s 1 -190453.33 0 +129893.60 2520.0 C57
2021-01-12 01:54:08 S 06 32 48.926 -62 05 28.61 V C57
2021-01-12 01:54:08 s 1 -190329.76 4 +129109.40 9560.0 C57
2021-01-12 02:04:08 S 06 32 47.890 -62 05 46.82 V C57
2021-01-12 02:04:08 s 1 -190204.01 8 +128323.73 2930.0 C57
2021-01-12 02:14:08 S 06 32 47.114 -62 06 04.18 V C57
2021-01-12 02:14:08 s 1 -190076.08 0 +127536.60 2590.0 C57
2021-01-12 02:24:08 S 06 32 46.310 -62 06 21.10 V C57
2021-01-12 02:24:08 s 1 -189945.93 4 +126748.00 8520.0 C57
2021-01-12 02:34:08 S 06 32 45.612 -62 06 36.90 V C57
2021-01-12 02:34:08 s 1 -189813.56 7 +125957.93 700.0 C57
2021-01-12 02:44:08 S 06 32 44.604 -62 06 54.90 V C57
2021-01-12 02:44:08 s 1 -189678.96 4 +125166.39 9100.0 C57
2021-01-12 02:54:08 S 06 32 43.750 -62 07 13.30 V C57
2021-01-12 02:54:08 s 1 -189542.11 2 +124373.38 3710.0 C57
2021-01-12 03:04:08 S 06 32 43.128 -62 07 30.47 V C57
2021-01-12 03:04:08 s 1 -189402.99 5 +123578.89 4480.0 C57
2021-01-12 03:14:08 S 06 32 42.295 -62 07 48.04 V C57
2021-01-12 03:14:08 s 1 -189261.59 8 +122782.93 1410.0 C57
2021-01-12 03:24:08 S 06 32 41.203 -62 08 04.92 V C57
2021-01-12 03:24:08 s 1 -189117.90 8 +121985.49 4450.0 C57
2021-01-12 03:34:08 S 06 32 40.426 -62 08 22.34 V C57
2021-01-12 03:34:08 s 1 -188971.90 8 +121186.57 3590.0 C57
2021-01-12 03:44:08 S 06 32 39.773 -62 08 38.62 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)