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
2021-01-29 00:14:07 s 1 +151998.66 9 +169205.34 5470.0 C57
2021-01-29 00:24:07 S 05 43 40.956 -74 06 32.00 V C57
2021-01-29 00:24:07 s 1 +151914.07 5 +170004.12 5220.0 C57
2021-01-29 00:34:07 S 05 43 38.760 -74 06 48.67 V C57
2021-01-29 00:34:07 s 1 +151827.67 9 +170800.88 1660.0 C57
2021-01-29 00:44:07 S 05 43 36.583 -74 07 08.72 V C57
2021-01-29 00:44:07 s 1 +151739.49 5 +171595.63 4810.0 C57
2021-01-29 00:54:07 S 05 43 34.445 -74 07 28.13 V C57
2021-01-29 00:54:07 s 1 +151649.53 7 +172388.36 4700.0 C57
2021-01-29 01:04:07 S 05 43 32.213 -74 07 45.55 V C57
2021-01-29 01:04:07 s 1 +151557.81 7 +173179.08 1340.0 C57
2021-01-29 01:14:07 S 05 43 30.156 -74 08 04.45 V C57
2021-01-29 01:14:07 s 1 +151464.34 9 +173967.80 4770.0 C57
2021-01-29 01:24:07 S 05 43 28.061 -74 08 23.86 V C57
2021-01-29 01:24:07 s 1 +151369.14 5 +174754.53 5010.0 C57
2021-01-29 01:34:07 S 05 43 25.690 -74 08 42.00 V C57
2021-01-29 01:34:07 s 1 +151272.21 8 +175539.26 2080.0 C57
2021-01-29 01:44:07 S 05 43 23.854 -74 09 00.72 V C57
2021-01-29 01:44:07 s 1 +151173.58 1 +176321.99 6000.0 C57
2021-01-29 01:54:07 S 05 43 21.708 -74 09 19.58 V C57
2021-01-29 01:54:07 s 1 +151073.24 7 +177102.75 6800.0 C57
2021-01-29 02:04:07 S 05 43 19.342 -74 09 37.66 V C57
2021-01-29 02:04:07 s 1 +150971.22 8 +177881.52 4490.0 C57
2021-01-29 02:14:07 S 05 43 17.393 -74 09 56.27 V C57
2021-01-29 02:14:07 s 1 +150867.53 5 +178658.32 9110.0 C57
2021-01-29 02:24:07 S 05 43 15.154 -74 10 13.26 V C57
2021-01-29 02:24:07 s 1 +150762.18 3 +179433.14 670.0 C57
2021-01-29 02:34:07 S 05 43 13.133 -74 10 33.13 V C57
2021-01-29 02:34:07 s 1 +150655.18 1 +180206.00 9190.0 C57
2021-01-29 02:44:07 S 05 43 10.625 -74 10 53.15 V C57
2021-01-29 02:44:07 s 1 +150546.54 3 +180976.90 4710.0 C57
2021-01-29 02:54:07 S 05 43 08.690 -74 11 10.39 V C57
2021-01-29 02:54:07 s 1 +150436.28 0 +181745.84 7220.0 C57
2021-01-29 03:04:07 S 05 43 06.710 -74 11 29.00 V C57
2021-01-29 03:04:07 s 1 +150324.40 5 +182512.82 6770.0 C57
2021-01-29 03:14:07 S 05 43 04.301 -74 11 48.26 V C57
2021-01-29 03:14:07 s 1 +150210.92 7 +183277.86 3370.0 C57
2021-01-29 03:24:07 S 05 43 02.040 -74 12 06.80 V C57
2021-01-29 03:24:07 s 1 +150095.86 0 +184040.95 7040.0 C57
2021-01-29 03:34:07 S 05 43 00.060 -74 12 25.45 V C57
2021-01-29 03:34:07 s 1 +149979.21 4 +184802.10 7810.0 C57
2021-01-29 03:44:07 S 05 42 57.677 -74 12 44.03 V C57
2021-01-29 03:44:07 s 1 +149861.00 1 +185561.31 5680.0 C57
2021-01-29 03:54:07 S 05 42 55.654 -74 13 02.06 V C57
2021-01-29 03:54:07 s 1 +149741.23 1 +186318.59 690.0 C57
2021-01-29 04:04:07 S 05 42 53.162 -74 13 19.96 V C57
2021-01-29 04:04:07 s 1 +149619.91 7 +187073.95 2850.0 C57
2021-01-29 04:14:07 S 05 42 51.122 -74 13 39.54 V C57
2021-01-29 04:14:07 s 1 +149497.06 8 +187827.38 2190.0 C57
2021-01-29 04:24:07 S 05 42 49.061 -74 13 59.09 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)