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
2021-01-04 00:54:08 S 06 48 34.706 -55 27 56.30 – V C57
2021-01-04 00:54:08 s 1 +98638.186 0 +332545.71 4290.0 – C57
2021-01-04 01:04:08 S 06 48 34.070 -55 28 19.42 – V C57
2021-01-04 01:04:08 s 1 +98339.838 0 +332921.47 1230.0 – C57
2021-01-04 01:14:08 S 06 48 33.338 -55 28 42.60 – V C57
2021-01-04 01:14:08 s 1 +98041.155 0 +333296.08 7710.0 – C57
2021-01-04 01:24:08 S 06 48 32.616 -55 29 05.50 – V C57
2021-01-04 01:24:08 s 1 +97742.139 0 +333669.55 3740.0 – C57
2021-01-04 01:34:08 S 06 48 32.124 -55 29 29.29 – V C57
2021-01-04 01:34:08 s 1 +97442.791 0 +334041.89 9330.0 – C57
2021-01-04 01:44:08 S 06 48 31.394 -55 29 51.97 – V C57
2021-01-04 01:44:08 s 1 +97143.115 0 +334413.09 4480.0 – C57
2021-01-04 01:54:08 S 06 48 30.629 -55 30 15.59 – V C57
2021-01-04 01:54:08 s 1 +96843.111 0 +334783.16 9180.0 – C57
2021-01-04 02:04:08 S 06 48 30.158 -55 30 38.34 – V C57
2021-01-04 02:04:08 s 1 +96542.782 0 +335152.09 3450.0 – C57
2021-01-04 02:14:08 S 06 48 29.436 -55 31 01.92 – V C57
2021-01-04 02:14:08 s 1 +96242.129 0 +335519.89 7280.0 – C57
2021-01-04 02:24:08 S 06 48 28.730 -55 31 25.00 – V C57
2021-01-04 02:24:08 s 1 +95941.154 0 +335886.56 690.0 – C57
2021-01-04 02:34:08 S 06 48 28.114 -55 31 49.12 – V C57
2021-01-04 02:34:08 s 1 +95639.858 0 +336252.11 3660.0 – C57
2021-01-04 02:44:08 S 06 48 27.442 -55 32 11.62 – V C57
2021-01-04 02:44:08 s 1 +95338.244 0 +336616.52 6200.0 – C57
2021-01-04 02:54:08 S 06 48 26.736 -55 32 35.45 – V C57
2021-01-04 02:54:08 s 1 +95036.313 0 +336979.81 8320.0 – C57
2021-01-04 03:04:08 S 06 48 26.112 -55 32 57.73 – V C57
2021-01-04 03:04:08 s 1 +94734.067 0 +337341.98 10.0 – C57
2021-01-04 03:14:08 S 06 48 25.546 -55 33 20.09 – V C57
2021-01-04 03:14:08 s 1 +94431.508 0 +337703.02 1290.0 – C57
2021-01-04 03:24:08 S 06 48 24.682 -55 33 44.46 – V C57
2021-01-04 03:24:08 s 1 +94128.637 0 +338062.95 2140.0 – C57
2021-01-04 03:34:08 S 06 48 24.146 -55 34 08.26 – V C57
2021-01-04 03:34:08 s 1 +93825.457 0 +338421.75 2580.0 – C57
2021-01-04 03:44:08 S 06 48 23.582 -55 34 30.43 – V C57
2021-01-04 03:44:08 s 1 +93521.968 0 +338779.43 2610.0 – C57
2021-01-04 03:54:08 S 06 48 22.846 -55 34 54.34 – V C57
2021-01-04 03:54:08 s 1 +93218.173 0 +339135.99 2230.0 – C57
2021-01-04 04:04:08 S 06 48 22.145 -55 35 17.77 – V C57
2021-01-04 04:04:08 s 1 +92914.073 0 +339491.44 1430.0 – C57
2021-01-04 04:14:08 S 06 48 21.629 -55 35 40.09 – V C57
2021-01-04 04:14:08 s 1 +92609.670 0 +339845.77 240.0 – C57
2021-01-04 04:24:08 S 06 48 20.791 -55 36 03.13 – V C57
2021-01-04 04:24:08 s 1 +92304.966 0 +340198.99 8630.0 – C57
2021-01-04 04:34:08 S 06 48 20.112 -55 36 28.30 – V C57
2021-01-04 04:34:08 s 1 +91999.962 0 +340551.10 6630.0 – C57
2021-01-04 04:44:08 S 06 48 19.541 -55 36 50.51 – V C57
2021-01-04 04:44:08 s 1 +91694.661 0 +340902.09 4220.0 – C57
2021-01-04 04:54:08 S 06 48 18.830 -55 37 13.19 – V C57
2021-01-04 04:54:08 s 1 +91389.063 0 +341251.98 1420.0 – 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)