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
2020-12-29 00:04:08 S 06 54 08.342 -49 52 58.76 – V C57
2020-12-29 00:04:08 s 1 -196443.11 5 +165611.44 8400.0 – C57
2020-12-29 00:14:08 S 06 54 07.771 -49 53 20.26 – V C57
2020-12-29 00:14:08 s 1 -196415.58 0 +164891.90 8530.0 – C57
2020-12-29 00:24:08 S 06 54 07.378 -49 53 42.76 – V C57
2020-12-29 00:24:08 s 1 -196386.39 6 +164170.98 6180.0 – C57
2020-12-29 00:34:08 S 06 54 06.857 -49 54 04.32 – V C57
2020-12-29 00:34:08 s 1 -196355.55 4 +163448.70 1350.0 – C57
2020-12-29 00:44:08 S 06 54 06.391 -49 54 26.82 – V C57
2020-12-29 00:44:08 s 1 -196323.04 6 +162725.04 4020.0 – C57
2020-12-29 00:54:08 S 06 54 05.774 -49 54 48.06 – V C57
2020-12-29 00:54:08 s 1 -196288.86 1 +162000.01 4170.0 – C57
2020-12-29 01:04:08 S 06 54 05.434 -49 55 11.46 – V C57
2020-12-29 01:04:08 s 1 -196252.99 1 +161273.60 1800.0 – C57
2020-12-29 01:14:08 S 06 54 04.913 -49 55 32.77 – V C57
2020-12-29 01:14:08 s 1 -196215.42 7 +160545.82 6880.0 – C57
2020-12-29 01:24:08 S 06 54 04.414 -49 55 56.32 – V C57
2020-12-29 01:24:08 s 1 -196176.15 9 +159816.65 9410.0 – C57
2020-12-29 01:34:08 S 06 54 03.953 -49 56 16.04 – V C57
2020-12-29 01:34:08 s 1 -196135.17 8 +159086.10 9360.0 – C57
2020-12-29 01:44:08 S 06 54 03.288 -49 56 38.18 – V C57
2020-12-29 01:44:08 s 1 -196092.47 4 +158354.17 6740.0 – C57
2020-12-29 01:54:08 S 06 54 03.053 -49 57 01.73 – V C57
2020-12-29 01:54:08 s 1 -196048.03 8 +157620.86 1510.0 – C57
2020-12-29 02:04:08 S 06 54 02.616 -49 57 23.00 – V C57
2020-12-29 02:04:08 s 1 -196001.86 0 +156886.15 3670.0 – C57
2020-12-29 02:14:08 S 06 54 02.009 -49 57 45.47 – V C57
2020-12-29 02:14:08 s 1 -195953.93 1 +156150.07 3210.0 – C57
2020-12-29 02:24:08 S 06 54 01.558 -49 58 07.21 – V C57
2020-12-29 02:24:08 s 1 -195904.24 0 +155412.59 100.0 – C57
2020-12-29 02:34:08 S 06 54 01.181 -49 58 29.32 – V C57
2020-12-29 02:34:08 s 1 -195852.77 8 +154673.72 4330.0 – C57
2020-12-29 02:44:08 S 06 54 00.607 -49 58 51.71 – V C57
2020-12-29 02:44:08 s 1 -195799.53 4 +153933.45 5900.0 – C57
2020-12-29 02:54:08 S 06 54 00.072 -49 59 14.60 – V C57
2020-12-29 02:54:08 s 1 -195744.49 9 +153191.80 4770.0 – C57
2020-12-29 03:04:08 S 06 53 59.494 -49 59 36.56 – V C57
2020-12-29 03:04:08 s 1 -195687.66 3 +152448.74 940.0 – C57
2020-12-29 03:14:08 S 06 53 59.174 -49 59 58.52 – V C57
2020-12-29 03:14:08 s 1 -195629.01 4 +151704.29 4400.0 – C57
2020-12-29 03:24:08 S 06 53 58.781 -50 00 20.20 – V C57
2020-12-29 03:24:08 s 1 -195568.54 4 +150958.44 5120.0 – C57
2020-12-29 03:34:08 S 06 53 58.169 -50 00 41.44 – V C57
2020-12-29 03:34:08 s 1 -195506.24 2 +150211.19 3090.0 – C57
2020-12-29 03:44:08 S 06 53 57.653 -50 01 03.14 – V C57
2020-12-29 03:44:08 s 1 -195442.09 6 +149462.54 8300.0 – C57
2020-12-29 03:54:08 S 06 53 57.144 -50 01 25.46 – V C57
2020-12-29 03:54:08 s 1 -195376.09 7 +148712.48 730.0 – C57
2020-12-29 04:04:08 S 06 53 56.738 -50 01 48.07 – V C57
2020-12-29 04:04:08 s 1 -195308.23 3 +147961.02 360.0 – 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)