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
2021-01-30 22:24:07 s 1 +87986.253 0 +326271.60 450.0 – C57
2021-01-30 22:34:07 S 05 32 25.214 -75 28 41.23 – V C57
2021-01-30 22:34:07 s 1 +87670.598 0 +326642.15 9270.0 – C57
2021-01-30 22:44:07 S 05 32 22.248 -75 28 58.15 – V C57
2021-01-30 22:44:07 s 1 +87354.618 0 +327011.50 7450.0 – C57
2021-01-30 22:54:07 S 05 32 19.778 -75 29 15.04 – V C57
2021-01-30 22:54:07 s 1 +87038.315 0 +327379.63 5010.0 – C57
2021-01-30 23:04:07 S 05 32 17.038 -75 29 32.82 – V C57
2021-01-30 23:04:07 s 1 +86721.691 0 +327746.55 1940.0 – C57
2021-01-30 23:14:07 S 05 32 14.359 -75 29 48.91 – V C57
2021-01-30 23:14:07 s 1 +86404.748 0 +328112.26 8250.0 – C57
2021-01-30 23:24:07 S 05 32 11.580 -75 30 06.01 – V C57
2021-01-30 23:24:07 s 1 +86087.488 0 +328476.76 3930.0 – C57
2021-01-30 23:34:07 S 05 32 08.676 -75 30 22.79 – V C57
2021-01-30 23:34:07 s 1 +85769.913 0 +328840.05 9000.0 – C57
2021-01-30 23:44:07 S 05 32 06.403 -75 30 39.46 – V C57
2021-01-30 23:44:07 s 1 +85452.025 0 +329202.14 3460.0 – C57
2021-01-30 23:54:07 S 05 32 04.008 -75 30 56.38 – V C57
2021-01-30 23:54:07 s 1 +85133.825 0 +329563.03 7310.0 – C57
2021-01-31 00:04:07 S 05 32 00.814 -75 31 13.19 – V C57
2021-01-31 00:04:07 s 1 +84815.316 0 +329922.72 560.0 – C57
2021-01-31 00:14:07 S 05 31 58.039 -75 31 30.61 – V C57
2021-01-31 00:14:07 s 1 +84496.499 0 +330281.21 3200.0 – C57
2021-01-31 00:24:07 S 05 31 55.279 -75 31 47.78 – V C57
2021-01-31 00:24:07 s 1 +84177.377 0 +330638.49 5240.0 – C57
2021-01-31 00:34:07 S 05 31 52.714 -75 32 05.10 – V C57
2021-01-31 00:34:07 s 1 +83857.951 0 +330994.58 6690.0 – C57
2021-01-31 00:44:07 S 05 31 50.047 -75 32 21.98 – V C57
2021-01-31 00:44:07 s 1 +83538.222 0 +331349.48 7550.0 – C57
2021-01-31 00:54:07 S 05 31 47.102 -75 32 38.44 – V C57
2021-01-31 00:54:07 s 1 +83218.194 0 +331703.18 7810.0 – C57
2021-01-31 01:04:07 S 05 31 44.093 -75 32 44.99 – V C57
2021-01-31 01:04:07 s 1 +82897.867 0 +332055.69 7500.0 – C57
2021-01-31 01:14:07 S 05 31 41.460 -75 33 11.81 – V C57
2021-01-31 01:14:07 s 1 +82577.244 0 +332407.01 6590.0 – C57
2021-01-31 01:24:07 S 05 31 38.918 -75 33 29.16 – V C57
2021-01-31 01:24:07 s 1 +82256.326 0 +332757.13 5110.0 – C57
2021-01-31 01:34:07 S 05 31 36.226 -75 33 46.73 – V C57
2021-01-31 01:34:07 s 1 +81935.115 0 +333106.07 3060.0 – C57
2021-01-31 01:44:07 S 05 31 33.473 -75 34 03.94 – V C57
2021-01-31 01:44:07 s 1 +81613.614 0 +333453.83 430.0 – C57
2021-01-31 01:54:07 S 05 31 30.638 -75 34 19.92 – V C57
2021-01-31 01:54:07 s 1 +81291.823 0 +333800.39 7230.0 – C57
2021-01-31 02:04:07 S 05 31 27.826 -75 34 35.72 – V C57
2021-01-31 02:04:07 s 1 +80969.744 0 +334145.78 3470.0 – C57
2021-01-31 02:14:07 S 05 31 24.965 -75 34 53.94 – V C57
2021-01-31 02:14:07 s 1 +80647.380 0 +334489.98 9140.0 – C57
2021-01-31 02:24:07 S 05 31 22.267 -75 35 11.08 – V C57
2021-01-31 02:24:07 s 1 +80324.733 0 +334833.00 4260.0 – C57
2021-01-31 02:34:07 S 05 31 19.476 -75 35 26.88 – 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)