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
2021-06-19 10:24:33 C 19 46 15.67 +36 45 23.9 V T05
2021-06-21 00:34:37 C 19 43 11.40 +37 00 51.3 o Z22
2021-06-21 00:50:37 C 19 43 10.02 +37 00 57.7 o Z22
2021-06-21 01:06:48 C 19 43 08.64 +37 01 04.0 o Z22
2021-06-22 02:18:41 C 19 41 05.55 +37 09 49.6 o Z22
2021-06-22 02:34:03 C 19 41 04.21 +37 09 54.7 o Z22
2021-06-23 11:00:51 C 19 38 25.51 +37 19 30.3 V T05
2021-06-23 11:06:08 C 19 38 25.07 +37 19 32.2 V T05
2021-06-23 11:15:21 C 19 38 24.29 +37 19 35.6 V T05
2021-06-23 11:22:36 C 19 38 23.61 +37 19 36.3 V T05
2021-06-25 03:54:01 S 19 34 52.032 +37 31 37.70 V C57
2021-06-25 03:54:01 s 1 +93612.156 0 -55298.361 240.0 C57
2021-06-25 05:44:01 S 19 34 40.507 +37 31 52.25 V C57
2021-06-25 05:44:01 s 1 +104604.53 0 -45175.278 6650.0 C57
2021-06-25 06:04:01 S 19 34 38.398 +37 31 57.90 V C57
2021-06-25 06:04:01 s 1 +106482.72 9 -43277.844 5080.0 C57
2021-06-25 06:14:01 S 19 34 36.662 +37 32 03.30 V C57
2021-06-25 06:14:01 s 1 +107408.22 2 -42323.554 9590.0 C57
2021-06-25 06:24:01 S 19 34 35.810 +37 32 06.65 V C57
2021-06-25 06:24:01 s 1 +108324.70 7 -41365.722 7840.0 C57
2021-06-25 06:34:01 S 19 34 35.165 +37 32 05.28 V C57
2021-06-25 06:34:01 s 1 +109232.23 1 -40404.478 9980.0 C57
2021-06-25 06:54:01 S 19 34 32.830 +37 32 10.50 V C57
2021-06-25 06:54:01 s 1 +111020.59 6 -38472.248 6610.0 C57
2021-06-25 07:14:01 S 19 34 30.811 +37 32 13.13 V C57
2021-06-25 07:14:01 s 1 +112773.72 5 -36527.838 810.0 C57
2021-06-25 07:24:01 S 19 34 29.693 +37 32 13.16 V C57
2021-06-25 07:24:01 s 1 +113637.20 6 -35551.359 4910.0 C57
2021-06-25 07:34:01 S 19 34 28.790 +37 32 16.87 V C57
2021-06-25 07:34:01 s 1 +114492.03 7 -34572.180 3930.0 C57
2021-06-25 07:44:01 S 19 34 27.866 +37 32 17.59 V C57
2021-06-25 07:44:01 s 1 +115338.27 2 -33590.414 8020.0 C57
2021-06-25 08:04:01 S 19 34 25.690 +37 32 19.25 V C57
2021-06-25 08:04:01 s 1 +117005.17 4 -31619.548 2140.0 C57
2021-06-25 08:24:01 S 19 34 23.616 +37 32 18.96 V C57
2021-06-25 08:24:01 s 1 +118638.36 1 -29639.598 8700.0 C57
2021-06-25 08:34:00 S 19 34 22.502 +37 32 21.30 V C57
2021-06-25 08:34:00 s 1 +119442.45 3 -28646.467 850.0 C57
2021-06-25 08:44:01 S 19 34 21.386 +37 32 25.94 V C57
2021-06-25 08:44:01 s 1 +120238.28 7 -27651.364 9140.0 C57
2021-06-25 08:54:01 S 19 34 20.400 +37 32 26.92 V C57
2021-06-25 08:54:01 s 1 +121025.92 2 -26654.381 3760.0 C57
2021-06-25 09:04:01 S 19 34 19.282 +37 32 29.00 V C57
2021-06-25 09:04:01 s 1 +121805.41 5 -25655.612 4900.0 C57
2021-06-25 09:14:01 S 19 34 18.605 +37 32 26.05 V C57
2021-06-25 09:14:01 s 1 +122576.82 6 -24655.147 2730.0 C57
2021-06-25 09:24:01 S 19 34 17.489 +37 32 32.10 V C57
2021-06-25 09:24:01 s 1 +123340.21 1 -23653.075 7440.0 C57
2021-06-25 09:34:01 S 19 34 16.402 +37 32 33.04 V C57
2021-06-25 09:34:01 s 1 +124095.63 1 -22649.481 9210.0 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)