IAA RAS IAA Minor Planet Database

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
2021-02-01 03:54:07 s 1 +28546.640 0 +374147.30 3240.0 – C57
2021-02-01 04:04:07 S 05 23 55.850 -76 17 25.04 – V C57
2021-02-01 04:04:07 s 1 +28197.740 0 +374322.35 3250.0 – C57
2021-02-01 04:14:07 S 05 23 52.735 -76 17 41.21 – V C57
2021-02-01 04:14:07 s 1 +27848.763 0 +374496.39 3070.0 – C57
2021-02-01 04:24:07 S 05 23 49.824 -76 17 56.47 – V C57
2021-02-01 04:24:07 s 1 +27499.711 0 +374669.40 2690.0 – C57
2021-02-01 04:34:07 S 05 23 46.834 -76 18 13.10 – V C57
2021-02-01 04:34:07 s 1 +27150.586 0 +374841.40 2140.0 – C57
2021-02-01 04:44:07 S 05 23 43.526 -76 18 29.20 – V C57
2021-02-01 04:44:07 s 1 +26801.389 0 +375012.38 1390.0 – C57
2021-02-01 04:54:07 S 05 23 40.522 -76 18 44.32 – V C57
2021-02-01 04:54:07 s 1 +26452.119 0 +375182.35 470.0 – C57
2021-02-01 05:04:07 S 05 23 37.730 -76 19 00.55 – V C57
2021-02-01 05:04:07 s 1 +26102.780 0 +375351.30 9360.0 – C57
2021-02-01 05:14:07 S 05 23 34.658 -76 19 17.58 – V C57
2021-02-01 05:14:07 s 1 +25753.370 0 +375519.24 8070.0 – C57
2021-02-01 05:24:07 S 05 23 31.370 -76 19 31.98 – V C57
2021-02-01 05:24:07 s 1 +25403.892 0 +375686.16 6610.0 – C57
2021-02-01 05:34:07 S 05 23 28.702 -76 19 49.66 – V C57
2021-02-01 05:34:07 s 1 +25054.347 0 +375852.08 4970.0 – C57
2021-02-01 05:44:07 S 05 23 25.445 -76 20 05.24 – V C57
2021-02-01 05:44:07 s 1 +24704.735 0 +376016.98 3150.0 – C57
2021-02-01 05:54:07 S 05 23 22.102 -76 20 19.50 – V C57
2021-02-01 05:54:07 s 1 +24355.058 0 +376180.87 1160.0 – C57
2021-02-01 06:04:07 S 05 23 18.960 -76 20 38.36 – V C57
2021-02-01 06:04:07 s 1 +24005.316 0 +376343.75 9010.0 – C57
2021-02-01 06:14:07 S 05 23 16.126 -76 20 52.69 – V C57
2021-02-01 06:14:07 s 1 +23655.511 0 +376505.63 6680.0 – C57
2021-02-01 06:24:07 S 05 23 12.998 -76 21 08.14 – V C57
2021-02-01 06:24:07 s 1 +23305.643 0 +376666.49 4190.0 – C57
2021-02-01 06:34:07 S 05 23 10.013 -76 21 24.34 – V C57
2021-02-01 06:34:07 s 1 +22955.714 0 +376826.34 1530.0 – C57
2021-02-01 06:44:07 S 05 23 06.967 -76 21 41.11 – V C57
2021-02-01 06:44:07 s 1 +22605.725 0 +376985.19 8710.0 – C57
2021-02-01 06:54:07 S 05 23 03.914 -76 21 57.49 – V C57
2021-02-01 06:54:07 s 1 +22255.676 0 +377143.03 5720.0 – C57
2021-02-01 07:04:07 S 05 23 00.835 -76 22 12.58 – V C57
2021-02-01 07:04:07 s 1 +21905.569 0 +377299.87 2580.0 – C57
2021-02-01 07:14:07 S 05 22 57.619 -76 22 27.95 – V C57
2021-02-01 07:14:07 s 1 +21555.404 0 +377455.70 9280.0 – C57
2021-02-01 07:24:07 S 05 22 54.684 -76 22 44.98 – V C57
2021-02-01 07:24:07 s 1 +21205.183 0 +377610.52 5820.0 – C57
2021-02-01 07:34:07 S 05 22 51.763 -76 23 00.24 – V C57
2021-02-01 07:34:07 s 1 +20854.907 0 +377764.35 2210.0 – C57
2021-02-01 07:44:07 S 05 22 48.708 -76 23 16.26 – V C57
2021-02-01 07:44:07 s 1 +20504.576 0 +377917.16 8440.0 – C57
2021-02-01 07:54:07 S 05 22 45.461 -76 23 32.75 – V C57
2021-02-01 07:54:07 s 1 +20154.192 0 +378068.98 4530.0 – C57
2021-02-01 08:04:07 S 05 22 42.257 -76 23 48.44 – 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)