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
2021-01-28 06:24:07 s 1 +146736.48 7 +71182.623 3810.0 – C57
2021-01-28 06:54:07 S 05 47 08.354 -73 33 05.47 – V C57
2021-01-28 06:54:07 s 1 +147409.38 2 +74285.814 8370.0 – C57
2021-01-28 07:04:07 S 05 47 06.660 -73 33 26.46 – V C57
2021-01-28 07:04:07 s 1 +147624.57 2 +75315.647 6630.0 – C57
2021-01-28 07:14:07 S 05 47 04.778 -73 33 44.64 – V C57
2021-01-28 07:14:07 s 1 +147835.28 5 +76343.189 6710.0 – C57
2021-01-28 07:24:07 S 05 47 03.226 -73 34 04.62 – V C57
2021-01-28 07:24:07 s 1 +148041.56 8 +77368.436 8720.0 – C57
2021-01-28 07:34:07 S 05 47 01.159 -73 34 24.71 – V C57
2021-01-28 07:34:07 s 1 +148243.46 4 +78391.385 2740.0 – C57
2021-01-28 07:44:07 S 05 46 59.472 -73 34 43.86 – V C57
2021-01-28 07:44:07 s 1 +148441.01 9 +79412.031 8830.0 – C57
2021-01-28 07:54:07 S 05 46 57.799 -73 35 03.08 – V C57
2021-01-28 07:54:07 s 1 +148634.27 7 +80430.372 7090.0 – C57
2021-01-28 08:04:07 S 05 46 55.906 -73 35 22.34 – V C57
2021-01-28 08:04:07 s 1 +148823.28 0 +81446.404 7590.0 – C57
2021-01-28 08:14:07 S 05 46 53.976 -73 35 41.96 – V C57
2021-01-28 08:14:07 s 1 +149008.07 1 +82460.124 400.0 – C57
2021-01-28 08:24:07 S 05 46 52.078 -73 36 01.26 – V C57
2021-01-28 08:24:07 s 1 +149188.69 2 +83471.530 5610.0 – C57
2021-01-28 08:34:07 S 05 46 50.378 -73 36 21.53 – V C57
2021-01-28 08:34:07 s 1 +149365.18 5 +84480.621 3290.0 – C57
2021-01-28 08:44:07 S 05 46 48.665 -73 36 39.78 – V C57
2021-01-28 08:44:07 s 1 +149537.59 1 +85487.393 3510.0 – C57
2021-01-28 08:54:07 S 05 46 46.426 -73 36 59.11 – V C57
2021-01-28 08:54:07 s 1 +149705.95 1 +86491.845 6350.0 – C57
2021-01-28 09:04:07 S 05 46 44.921 -73 37 19.38 – V C57
2021-01-28 09:04:07 s 1 +149870.30 3 +87493.976 1870.0 – C57
2021-01-28 09:14:07 S 05 46 43.046 -73 37 38.35 – V C57
2021-01-28 09:14:07 s 1 +150030.68 9 +88493.784 160.0 – C57
2021-01-28 09:24:07 S 05 46 40.918 -73 37 57.54 – V C57
2021-01-28 09:24:07 s 1 +150187.14 5 +89491.268 1270.0 – C57
2021-01-28 09:34:07 S 05 46 39.329 -73 38 18.35 – V C57
2021-01-28 09:34:07 s 1 +150339.71 2 +90486.429 5290.0 – C57
2021-01-28 09:44:07 S 05 46 37.493 -73 38 37.75 – V C57
2021-01-28 09:44:07 s 1 +150488.42 7 +91479.264 2270.0 – C57
2021-01-28 09:54:07 S 05 46 35.498 -73 38 54.92 – V C57
2021-01-28 09:54:07 s 1 +150633.32 7 +92469.774 2290.0 – C57
2021-01-28 10:04:07 S 05 46 33.552 -73 39 14.87 – V C57
2021-01-28 10:04:07 s 1 +150774.44 9 +93457.958 5410.0 – C57
2021-01-28 10:14:07 S 05 46 31.759 -73 39 35.10 – V C57
2021-01-28 10:14:07 s 1 +150911.83 0 +94443.817 1700.0 – C57
2021-01-28 10:24:07 S 05 46 29.659 -73 39 52.92 – V C57
2021-01-28 10:24:07 s 1 +151045.50 5 +95427.351 1230.0 – C57
2021-01-28 10:34:07 S 05 46 28.044 -73 40 12.94 – V C57
2021-01-28 10:34:07 s 1 +151175.51 0 +96408.560 4050.0 – C57
2021-01-28 10:44:07 S 05 46 26.230 -73 40 33.35 – V C57
2021-01-28 10:44:07 s 1 +151301.88 1 +97387.444 240.0 – C57
2021-01-28 10:54:07 S 05 46 24.120 -73 40 52.14 – 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)