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
2021-01-17 13:34:08 s 1 +87285.283 0 +326959.45 1960.0 C57
2021-01-17 13:44:08 S 06 22 43.411 -66 22 00.62 V C57
2021-01-17 13:44:08 s 1 +86976.942 0 +327335.76 7500.0 C57
2021-01-17 13:54:08 S 06 22 42.283 -66 22 20.28 V C57
2021-01-17 13:54:08 s 1 +86668.269 0 +327710.86 2450.0 C57
2021-01-17 14:04:08 S 06 22 41.002 -66 22 39.11 V C57
2021-01-17 14:04:08 s 1 +86359.265 0 +328084.76 6810.0 C57
2021-01-17 14:14:08 S 06 22 39.622 -66 22 58.84 V C57
2021-01-17 14:14:08 s 1 +86049.932 0 +328457.45 590.0 C57
2021-01-17 14:24:08 S 06 22 38.374 -66 23 19.46 V C57
2021-01-17 14:24:08 s 1 +85740.272 0 +328828.94 3790.0 C57
2021-01-17 14:34:08 S 06 22 37.409 -66 23 38.83 V C57
2021-01-17 14:34:08 s 1 +85430.288 0 +329199.23 6410.0 C57
2021-01-17 14:44:08 S 06 22 36.156 -66 23 57.95 V C57
2021-01-17 14:44:08 s 1 +85119.980 0 +329568.32 8460.0 C57
2021-01-17 14:54:08 S 06 22 34.817 -66 24 17.14 V C57
2021-01-17 14:54:08 s 1 +84809.352 0 +329936.22 9940.0 C57
2021-01-17 15:04:08 S 06 22 33.514 -66 24 36.40 V C57
2021-01-17 15:04:08 s 1 +84498.404 0 +330302.91 860.0 C57
2021-01-17 15:14:08 S 06 22 32.460 -66 24 55.91 V C57
2021-01-17 15:14:08 s 1 +84187.139 0 +330668.42 1210.0 C57
2021-01-17 15:24:08 S 06 22 31.435 -66 25 16.00 V C57
2021-01-17 15:24:08 s 1 +83875.558 0 +331032.73 1000.0 C57
2021-01-17 15:34:08 S 06 22 30.341 -66 25 35.62 V C57
2021-01-17 15:34:08 s 1 +83563.664 0 +331395.85 230.0 C57
2021-01-17 15:44:08 S 06 22 29.050 -66 25 53.83 V C57
2021-01-17 15:44:08 s 1 +83251.457 0 +331757.78 8910.0 C57
2021-01-17 15:54:08 S 06 22 27.571 -66 26 13.24 V C57
2021-01-17 15:54:08 s 1 +82938.941 0 +332118.52 7030.0 C57
2021-01-17 16:04:08 S 06 22 26.477 -66 26 33.14 V C57
2021-01-17 16:04:08 s 1 +82626.117 0 +332478.07 4610.0 C57
2021-01-17 16:14:08 S 06 22 25.543 -66 26 52.73 V C57
2021-01-17 16:14:08 s 1 +82312.986 0 +332836.44 1650.0 C57
2021-01-17 16:24:08 S 06 22 24.317 -66 27 12.35 V C57
2021-01-17 16:24:08 s 1 +81999.550 0 +333193.63 8140.0 C57
2021-01-17 16:34:08 S 06 22 22.956 -66 27 31.61 V C57
2021-01-17 16:34:08 s 1 +81685.812 0 +333549.64 4090.0 C57
2021-01-17 16:44:08 S 06 22 21.773 -66 27 51.59 V C57
2021-01-17 16:44:08 s 1 +81371.772 0 +333904.46 9510.0 C57
2021-01-17 16:54:08 S 06 22 20.417 -66 28 09.59 V C57
2021-01-17 16:54:08 s 1 +81057.434 0 +334258.11 4390.0 C57
2021-01-17 17:04:08 S 06 22 19.418 -66 28 30.04 V C57
2021-01-17 17:04:08 s 1 +80742.798 0 +334610.57 8750.0 C57
2021-01-17 17:14:08 S 06 22 18.216 -66 28 50.20 V C57
2021-01-17 17:14:08 s 1 +80427.866 0 +334961.87 2580.0 C57
2021-01-17 17:24:08 S 06 22 16.836 -66 29 08.30 V C57
2021-01-17 17:24:08 s 1 +80112.641 0 +335311.98 5880.0 C57
2021-01-17 17:34:08 S 06 22 15.458 -66 29 28.28 V C57
2021-01-17 17:34:08 s 1 +79797.123 0 +335660.93 8670.0 C57
2021-01-17 17:44:08 S 06 22 14.532 -66 29 47.65 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)