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
2021-01-22 18:04:07 S 06 05 20.664 -70 04 04.58 V C57
2021-01-22 18:04:07 s 1 -154385.14 7 +328068.14 7280.0 C57
2021-01-22 18:14:08 S 06 05 19.061 -70 04 21.18 V C57
2021-01-22 18:14:08 s 1 -154636.18 1 +327718.66 4390.0 C57
2021-01-22 18:24:07 S 06 05 17.338 -70 04 37.45 V C57
2021-01-22 18:24:07 s 1 -154886.75 5 +327368.21 710.0 C57
2021-01-22 18:34:08 S 06 05 15.595 -70 04 52.75 V C57
2021-01-22 18:34:08 s 1 -155136.86 7 +327016.78 6240.0 C57
2021-01-22 18:44:07 S 06 05 14.232 -70 05 09.67 V C57
2021-01-22 18:44:07 s 1 -155386.51 7 +326664.36 990.0 C57
2021-01-22 18:54:08 S 06 05 12.893 -70 05 26.30 V C57
2021-01-22 18:54:08 s 1 -155635.70 1 +326310.96 4930.0 C57
2021-01-22 19:04:07 S 06 05 11.222 -70 05 42.79 V C57
2021-01-22 19:04:07 s 1 -155884.41 9 +325956.58 8090.0 C57
2021-01-22 19:14:08 S 06 05 09.864 -70 05 58.38 V C57
2021-01-22 19:14:08 s 1 -156132.66 9 +325601.21 440.0 C57
2021-01-22 19:54:07 S 06 05 03.648 -70 07 04.48 V C57
2021-01-22 19:54:07 s 1 -157120.95 7 +324169.88 1790.0 C57
2021-01-22 20:14:07 S 06 05 00.173 -70 07 35.26 V C57
2021-01-22 20:14:07 s 1 -157612.25 1 +323448.29 7600.0 C57
2021-01-22 20:34:07 S 06 04 57.110 -70 08 07.76 V C57
2021-01-22 20:34:07 s 1 -158101.62 8 +322722.74 120.0 C57
2021-01-22 20:44:07 S 06 04 55.342 -70 08 22.74 V C57
2021-01-22 20:44:07 s 1 -158345.59 3 +322358.49 5150.0 C57
2021-01-22 20:54:06 S 06 04 53.796 -70 08 39.84 V C57
2021-01-22 20:54:06 s 1 -158589.07 5 +321993.24 9350.0 C57
2021-01-22 21:04:07 S 06 04 52.226 -70 08 56.26 V C57
2021-01-22 21:04:07 s 1 -158832.07 0 +321627.00 2720.0 C57
2021-01-22 21:14:08 S 06 04 50.902 -70 09 11.84 V C57
2021-01-22 21:14:08 s 1 -159074.57 8 +321259.77 5250.0 C57
2021-01-22 21:24:07 S 06 04 49.246 -70 09 26.82 V C57
2021-01-22 21:24:07 s 1 -159316.59 7 +320891.54 6950.0 C57
2021-01-22 21:34:08 S 06 04 47.844 -70 09 44.06 V C57
2021-01-22 21:34:08 s 1 -159558.12 5 +320522.32 7810.0 C57
2021-01-22 21:44:07 S 06 04 46.051 -70 10 01.09 V C57
2021-01-22 21:44:07 s 1 -159799.16 0 +320152.11 7820.0 C57
2021-01-22 21:54:08 S 06 04 44.458 -70 10 15.89 V C57
2021-01-22 21:54:08 s 1 -160039.70 2 +319780.90 6990.0 C57
2021-01-22 22:04:07 S 06 04 42.694 -70 10 32.56 V C57
2021-01-22 22:04:07 s 1 -160279.74 7 +319408.70 5310.0 C57
2021-01-22 22:14:07 S 06 04 41.196 -70 10 49.19 V C57
2021-01-22 22:14:07 s 1 -160519.29 5 +319035.50 2780.0 C57
2021-01-22 22:24:08 S 06 04 40.030 -70 11 04.81 V C57
2021-01-22 22:24:08 s 1 -160758.34 3 +318661.30 9400.0 C57
2021-01-22 22:34:07 S 06 04 38.431 -70 11 21.23 V C57
2021-01-22 22:34:07 s 1 -160996.89 0 +318286.11 5150.0 C57
2021-01-22 22:44:08 S 06 04 36.694 -70 11 37.75 V C57
2021-01-22 22:44:08 s 1 -161234.93 5 +317909.92 50.0 C57
2021-01-22 22:54:07 S 06 04 34.958 -70 11 53.30 V C57
2021-01-22 22:54:07 s 1 -161472.47 5 +317532.73 4080.0 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)