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
2018-12-06 12:44:39 s 1 -115151.83 5 +358203.07 9460.0 C57
2018-12-06 13:14:39 S 03 57 27.041 -10 09 11.77 V C57
2018-12-06 13:14:39 s 1 -115970.35 6 +357543.83 60.0 C57
2018-12-06 13:44:39 S 03 57 24.636 -10 09 50.00 V C57
2018-12-06 13:44:39 s 1 -116785.98 7 +356876.04 4050.0 C57
2018-12-06 14:14:39 S 03 57 22.212 -10 10 29.03 V C57
2018-12-06 14:14:39 s 1 -117598.70 3 +356199.72 1280.0 C57
2018-12-06 14:44:39 S 03 57 19.759 -10 11 08.74 V C57
2018-12-06 14:44:39 s 1 -118408.47 4 +355514.85 1610.0 C57
2018-12-06 15:14:39 S 03 57 17.311 -10 11 48.52 V C57
2018-12-06 15:14:39 s 1 -119215.27 5 +354821.41 4870.0 C57
2018-12-06 15:44:39 S 03 57 14.842 -10 12 28.04 V C57
2018-12-06 15:44:39 s 1 -120019.07 6 +354119.42 920.0 C57
2018-12-06 16:14:39 S 03 57 12.334 -10 13 07.82 V C57
2018-12-06 16:14:39 s 1 -120819.85 1 +353408.85 9590.0 C57
2018-12-06 16:44:39 S 03 57 09.900 -10 13 47.93 V C57
2018-12-06 16:44:39 s 1 -121617.57 1 +352689.70 740.0 C57
2018-12-06 17:44:39 S 03 57 05.009 -10 15 06.19 V C57
2018-12-06 17:44:39 s 1 -123203.73 3 +351225.61 9800.0 C57
2018-12-06 18:14:39 S 03 57 02.484 -10 15 45.94 V C57
2018-12-06 18:14:39 s 1 -123992.11 7 +350480.66 7390.0 C57
2018-12-06 18:44:39 S 03 57 00.142 -10 16 25.50 V C57
2018-12-06 18:44:39 s 1 -124777.33 3 +349727.09 6820.0 C57
2018-12-06 19:14:39 S 03 56 57.689 -10 17 05.75 V C57
2018-12-06 19:14:39 s 1 -125559.34 9 +348964.89 7920.0 C57
2018-12-06 19:44:39 S 03 56 55.296 -10 17 43.76 V C57
2018-12-06 19:44:39 s 1 -126338.13 8 +348194.05 530.0 C57
2018-12-06 20:14:39 S 03 56 52.836 -10 18 23.51 V C57
2018-12-06 20:14:39 s 1 -127113.66 9 +347414.56 4470.0 C57
2018-12-06 20:44:39 S 03 56 50.376 -10 19 03.79 V C57
2018-12-06 20:44:39 s 1 -127885.91 2 +346626.42 9590.0 C57
2018-12-06 21:14:39 S 03 56 47.875 -10 19 41.74 V C57
2018-12-06 21:14:39 s 1 -128654.83 8 +345829.61 5710.0 C57
2018-12-06 21:44:39 S 03 56 45.518 -10 20 21.01 V C57
2018-12-06 21:44:39 s 1 -129420.41 5 +345024.12 2680.0 C57
2018-12-06 22:14:39 S 03 56 43.073 -10 21 01.44 V C57
2018-12-06 22:14:39 s 1 -130182.61 4 +344209.94 320.0 C57
2018-12-06 22:44:39 S 03 56 40.668 -10 21 40.46 V C57
2018-12-06 22:44:39 s 1 -130941.40 2 +343387.06 8460.0 C57
2018-12-06 23:14:39 S 03 56 38.249 -10 22 19.38 V C57
2018-12-06 23:14:39 s 1 -131696.75 0 +342555.46 6920.0 C57
2018-12-06 23:44:39 S 03 56 35.762 -10 23 00.38 V C57
2018-12-06 23:44:39 s 1 -132448.62 5 +341715.15 5540.0 C57
2018-12-07 00:14:39 S 03 56 33.403 -10 23 37.46 V C57
2018-12-07 00:14:39 s 1 -133196.99 6 +340866.10 4140.0 C57
2018-12-07 00:44:39 S 03 56 30.972 -10 24 18.47 V C57
2018-12-07 00:44:39 s 1 -133941.83 1 +340008.31 2540.0 C57
2018-12-07 01:14:39 S 03 56 28.519 -10 24 57.13 V C57
2018-12-07 01:14:39 s 1 -134683.09 8 +339141.76 570.0 C57
2018-12-07 01:44:39 S 03 56 26.098 -10 25 36.44 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)