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
2021-02-03 13:54:07 s 1 -91133.204 0 +377039.90 2750.0 – C57
2021-02-03 14:04:07 S 05 04 18.962 -77 45 21.92 – V C57
2021-02-03 14:04:07 s 1 -91455.013 0 +376886.14 5480.0 – C57
2021-02-03 14:14:07 S 05 04 15.341 -77 45 36.40 – V C57
2021-02-03 14:14:07 s 1 -91776.597 0 +376731.47 7870.0 – C57
2021-02-03 14:24:07 S 05 04 11.594 -77 45 51.08 – V C57
2021-02-03 14:24:07 s 1 -92097.955 0 +376575.87 9920.0 – C57
2021-02-03 14:34:07 S 05 04 07.555 -77 46 04.22 – V C57
2021-02-03 14:34:07 s 1 -92419.086 0 +376419.35 1630.0 – C57
2021-02-03 14:44:07 S 05 04 04.284 -77 46 19.96 – V C57
2021-02-03 14:44:07 s 1 -92739.989 0 +376261.91 2990.0 – C57
2021-02-03 14:54:07 S 05 04 00.199 -77 46 33.67 – V C57
2021-02-03 14:54:07 s 1 -93060.663 0 +376103.56 4020.0 – C57
2021-02-03 15:04:07 S 05 03 56.438 -77 46 47.68 – V C57
2021-02-03 15:04:07 s 1 -93381.107 0 +375944.28 4690.0 – C57
2021-02-03 15:14:07 S 05 03 53.014 -77 47 01.43 – V C57
2021-02-03 15:14:07 s 1 -93701.321 0 +375784.08 5020.0 – C57
2021-02-03 15:24:07 S 05 03 49.248 -77 47 16.26 – V C57
2021-02-03 15:24:07 s 1 -94021.303 0 +375622.96 5000.0 – C57
2021-02-03 15:34:07 S 05 03 45.506 -77 47 30.01 – V C57
2021-02-03 15:34:07 s 1 -94341.052 0 +375460.92 4620.0 – C57
2021-02-03 15:44:07 S 05 03 41.686 -77 47 44.41 – V C57
2021-02-03 15:44:07 s 1 -94660.568 0 +375297.97 3900.0 – C57
2021-02-03 15:54:07 S 05 03 38.136 -77 47 59.57 – V C57
2021-02-03 15:54:07 s 1 -94979.850 0 +375134.09 2820.0 – C57
2021-02-03 16:04:07 S 05 03 34.394 -77 48 13.00 – V C57
2021-02-03 16:04:07 s 1 -95298.896 0 +374969.29 1380.0 – C57
2021-02-03 16:14:07 S 05 03 30.559 -77 48 27.29 – V C57
2021-02-03 16:14:07 s 1 -95617.706 0 +374803.56 9590.0 – C57
2021-02-03 16:24:07 S 05 03 26.556 -77 48 40.82 – V C57
2021-02-03 16:24:07 s 1 -95936.278 0 +374636.92 7440.0 – C57
2021-02-03 16:34:07 S 05 03 22.860 -77 48 54.90 – V C57
2021-02-03 16:34:07 s 1 -96254.613 0 +374469.36 4920.0 – C57
2021-02-03 16:44:07 S 05 03 19.114 -77 49 09.84 – V C57
2021-02-03 16:44:07 s 1 -96572.709 0 +374300.87 2050.0 – C57
2021-02-03 16:54:07 S 05 03 15.151 -77 49 24.64 – V C57
2021-02-03 16:54:07 s 1 -96890.564 0 +374131.46 8810.0 – C57
2021-02-03 17:04:07 S 05 03 11.527 -77 49 38.14 – V C57
2021-02-03 17:04:07 s 1 -97208.179 0 +373961.13 5200.0 – C57
2021-02-03 17:14:07 S 05 03 08.030 -77 49 51.71 – V C57
2021-02-03 17:14:07 s 1 -97525.552 0 +373789.88 1230.0 – C57
2021-02-03 17:24:07 S 05 03 03.689 -77 50 05.86 – V C57
2021-02-03 17:24:07 s 1 -97842.682 0 +373617.71 6880.0 – C57
2021-02-03 17:34:07 S 05 03 00.194 -77 50 20.18 – V C57
2021-02-03 17:34:07 s 1 -98159.568 0 +373444.61 2170.0 – C57
2021-02-03 17:44:07 S 05 02 56.633 -77 50 35.02 – V C57
2021-02-03 17:44:07 s 1 -98476.210 0 +373270.60 7080.0 – C57
2021-02-03 17:54:07 S 05 02 52.687 -77 50 48.30 – V C57
2021-02-03 17:54:07 s 1 -98792.606 0 +373095.66 1620.0 – C57
2021-02-03 18:04:07 S 05 02 49.003 -77 51 03.20 – 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)