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
2018-12-07 14:14:39 s 1 -152590.11 1 +313494.05 8390.0 C57
2018-12-07 14:44:39 S 03 55 23.467 -10 42 31.14 V C57
2018-12-07 14:44:39 s 1 -153221.62 0 +312385.83 3160.0 C57
2018-12-07 15:14:39 S 03 55 21.082 -10 43 09.66 V C57
2018-12-07 15:14:39 s 1 -153848.51 6 +311268.44 1860.0 C57
2018-12-07 15:44:39 S 03 55 18.749 -10 43 46.85 V C57
2018-12-07 15:44:39 s 1 -154470.75 6 +310141.86 4280.0 C57
2018-12-07 16:14:39 S 03 55 16.385 -10 44 25.26 V C57
2018-12-07 16:14:39 s 1 -155088.29 5 +309006.08 170.0 C57
2018-12-07 16:44:39 S 03 55 13.994 -10 45 06.55 V C57
2018-12-07 16:44:39 s 1 -155701.09 1 +307861.06 9290.0 C57
2018-12-07 17:14:39 S 03 55 11.606 -10 45 44.39 V C57
2018-12-07 17:14:39 s 1 -156309.09 7 +306706.80 1410.0 C57
2018-12-07 17:44:39 S 03 55 09.130 -10 46 22.69 V C57
2018-12-07 17:44:39 s 1 -156912.26 8 +305543.28 6270.0 C57
2018-12-07 18:14:39 S 03 55 06.905 -10 47 01.46 V C57
2018-12-07 18:14:39 s 1 -157510.56 0 +304370.47 3620.0 C57
2018-12-07 18:44:39 S 03 55 04.486 -10 47 41.24 V C57
2018-12-07 18:44:39 s 1 -158103.92 4 +303188.36 3230.0 C57
2018-12-07 19:14:39 S 03 55 02.122 -10 48 19.15 V C57
2018-12-07 19:14:39 s 1 -158692.31 4 +301996.93 4830.0 C57
2018-12-07 19:44:39 S 03 54 59.777 -10 48 56.74 V C57
2018-12-07 19:44:39 s 1 -159275.68 3 +300796.15 8170.0 C57
2018-12-07 20:14:39 S 03 54 57.384 -10 49 36.26 V C57
2018-12-07 20:14:39 s 1 -159853.98 2 +299586.01 2980.0 C57
2018-12-07 20:44:39 S 03 54 55.080 -10 50 14.28 V C57
2018-12-07 20:44:39 s 1 -160427.16 3 +298366.49 9020.0 C57
2018-12-07 21:14:39 S 03 54 52.606 -10 50 53.34 V C57
2018-12-07 21:14:39 s 1 -160995.17 7 +297137.57 6000.0 C57
2018-12-07 21:44:39 S 03 54 50.326 -10 51 31.82 V C57
2018-12-07 21:44:39 s 1 -161557.97 2 +295899.22 3660.0 C57
2018-12-07 22:14:39 S 03 54 47.978 -10 52 10.27 V C57
2018-12-07 22:14:39 s 1 -162115.50 0 +294651.42 1720.0 C57
2018-12-07 22:44:39 S 03 54 45.521 -10 52 49.94 V C57
2018-12-07 22:44:39 s 1 -162667.70 8 +293394.16 9920.0 C57
2018-12-07 23:14:39 S 03 54 43.207 -10 53 26.74 V C57
2018-12-07 23:14:39 s 1 -163214.54 5 +292127.41 7970.0 C57
2018-12-07 23:44:39 S 03 54 40.812 -10 54 06.05 V C57
2018-12-07 23:44:39 s 1 -163755.95 8 +290851.15 5590.0 C57
2018-12-08 00:14:39 S 03 54 38.474 -10 54 44.96 V C57
2018-12-08 00:14:39 s 1 -164291.89 4 +289565.36 2500.0 C57
2018-12-08 00:44:39 S 03 54 36.151 -10 55 22.84 V C57
2018-12-08 00:44:39 s 1 -164822.29 9 +288270.02 8390.0 C57
2018-12-08 01:14:39 S 03 54 33.778 -10 56 02.11 V C57
2018-12-08 01:14:39 s 1 -165347.11 8 +286965.09 2980.0 C57
2018-12-08 01:44:39 S 03 54 31.414 -10 56 40.56 V C57
2018-12-08 01:44:39 s 1 -165866.29 7 +285650.57 5970.0 C57
2018-12-08 02:44:39 S 03 54 26.789 -10 57 55.98 V C57
2018-12-08 02:44:39 s 1 -166887.50 7 +282992.64 5930.0 C57
2018-12-08 03:14:39 S 03 54 24.470 -10 58 34.75 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)