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
2021-01-18 19:54:08 s 1 +27274.979 0 +376899.06 2420.0 – C57
2021-01-18 20:04:08 S 06 18 55.464 -67 19 59.74 – V C57
2021-01-18 20:04:08 s 1 +26931.128 0 +377076.59 3500.0 – C57
2021-01-18 20:14:08 S 06 18 54.168 -67 20 18.20 – V C57
2021-01-18 20:14:08 s 1 +26587.195 0 +377253.12 4420.0 – C57
2021-01-18 20:24:08 S 06 18 52.817 -67 20 36.82 – V C57
2021-01-18 20:24:08 s 1 +26243.178 0 +377428.65 5180.0 – C57
2021-01-18 20:34:08 S 06 18 51.715 -67 20 55.97 – V C57
2021-01-18 20:34:08 s 1 +25899.080 0 +377603.18 5790.0 – C57
2021-01-18 20:44:08 S 06 18 50.474 -67 21 14.40 – V C57
2021-01-18 20:44:08 s 1 +25554.901 0 +377776.70 6230.0 – C57
2021-01-18 20:54:08 S 06 18 49.164 -67 21 33.16 – V C57
2021-01-18 20:54:08 s 1 +25210.643 0 +377949.23 6520.0 – C57
2021-01-18 21:04:08 S 06 18 47.719 -67 21 51.41 – V C57
2021-01-18 21:04:08 s 1 +24866.306 0 +378120.76 6650.0 – C57
2021-01-18 21:14:08 S 06 18 46.387 -67 22 10.49 – V C57
2021-01-18 21:14:08 s 1 +24521.892 0 +378291.29 6640.0 – C57
2021-01-18 21:24:08 S 06 18 45.163 -67 22 28.27 – V C57
2021-01-18 21:24:08 s 1 +24177.401 0 +378460.82 6470.0 – C57
2021-01-18 21:34:08 S 06 18 44.026 -67 22 49.04 – V C57
2021-01-18 21:34:08 s 1 +23832.834 0 +378629.35 6150.0 – C57
2021-01-18 21:44:08 S 06 18 42.660 -67 23 06.68 – V C57
2021-01-18 21:44:08 s 1 +23488.193 0 +378796.89 5690.0 – C57
2021-01-18 21:54:08 S 06 18 41.256 -67 23 25.12 – V C57
2021-01-18 21:54:08 s 1 +23143.478 0 +378963.43 5080.0 – C57
2021-01-18 22:00:07 S 06 18 12.26 -67 05 36.3 – L C51
2021-01-18 22:04:08 S 06 18 39.773 -67 23 43.22 – V C57
2021-01-18 22:04:08 s 1 +22798.691 0 +379128.98 4330.0 – C57
2021-01-18 22:14:08 S 06 18 38.542 -67 24 02.41 – V C57
2021-01-18 22:14:08 s 1 +22453.831 0 +379293.53 3440.0 – C57
2021-01-18 22:24:08 S 06 18 37.308 -67 24 21.35 – V C57
2021-01-18 22:24:08 s 1 +22108.901 0 +379457.09 2400.0 – C57
2021-01-18 22:34:08 S 06 18 36.163 -67 24 40.61 – V C57
2021-01-18 22:34:08 s 1 +21763.902 0 +379619.65 1230.0 – C57
2021-01-18 22:44:08 S 06 18 34.702 -67 24 59.00 – V C57
2021-01-18 22:44:08 s 1 +21418.833 0 +379781.23 9920.0 – C57
2021-01-18 22:54:08 S 06 18 33.358 -67 25 16.54 – V C57
2021-01-18 22:54:08 s 1 +21073.697 0 +379941.81 8470.0 – C57
2021-01-18 23:04:08 S 06 18 31.824 -67 25 35.29 – V C57
2021-01-18 23:04:08 s 1 +20728.494 0 +380101.40 6900.0 – C57
2021-01-18 23:14:08 S 06 18 30.514 -67 25 53.22 – V C57
2021-01-18 23:14:08 s 1 +20383.225 0 +380260.00 5190.0 – C57
2021-01-18 23:24:08 S 06 18 29.489 -67 26 12.41 – V C57
2021-01-18 23:24:08 s 1 +20037.891 0 +380417.61 3340.0 – C57
2021-01-18 23:34:08 S 06 18 28.327 -67 26 31.96 – V C57
2021-01-18 23:34:08 s 1 +19692.493 0 +380574.23 1380.0 – C57
2021-01-18 23:44:08 S 06 18 26.803 -67 26 49.31 – V C57
2021-01-18 23:44:08 s 1 +19347.032 0 +380729.87 9280.0 – C57
2021-01-18 23:54:08 S 06 18 25.327 -67 27 08.03 – V C57
2021-01-18 23:54:08 s 1 +19001.509 0 +380884.51 7060.0 – 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)