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 09:44:07 s 1 -83017.398 0 +380585.29 9440.0 – C57
2021-02-03 09:54:07 S 05 05 51.266 -77 39 24.08 – V C57
2021-02-03 09:54:07 s 1 -83344.547 0 +380454.49 90.0 – C57
2021-02-03 10:04:07 S 05 05 47.520 -77 39 38.48 – V C57
2021-02-03 10:04:07 s 1 -83671.493 0 +380322.77 450.0 – C57
2021-02-03 10:14:07 S 05 05 44.246 -77 39 52.56 – V C57
2021-02-03 10:14:07 s 1 -83998.235 0 +380190.14 510.0 – C57
2021-02-03 10:24:07 S 05 05 40.469 -77 40 07.57 – V C57
2021-02-03 10:24:07 s 1 -84324.773 0 +380056.58 260.0 – C57
2021-02-03 10:34:07 S 05 05 36.838 -77 40 22.33 – V C57
2021-02-03 10:34:07 s 1 -84651.104 0 +379922.11 9720.0 – C57
2021-02-03 10:44:07 S 05 05 33.041 -77 40 35.94 – V C57
2021-02-03 10:44:07 s 1 -84977.230 0 +379786.73 8870.0 – C57
2021-02-03 10:54:07 S 05 05 29.947 -77 40 48.76 – V C57
2021-02-03 10:54:07 s 1 -85303.148 0 +379650.42 7710.0 – C57
2021-02-03 11:04:07 S 05 05 26.076 -77 41 04.09 – V C57
2021-02-03 11:04:07 s 1 -85628.857 0 +379513.20 6240.0 – C57
2021-02-03 11:14:07 S 05 05 22.238 -77 41 18.64 – V C57
2021-02-03 11:14:07 s 1 -85954.358 0 +379375.06 4470.0 – C57
2021-02-03 11:24:07 S 05 05 18.384 -77 41 33.04 – V C57
2021-02-03 11:24:07 s 1 -86279.649 0 +379236.00 2390.0 – C57
2021-02-03 11:34:07 S 05 05 15.194 -77 41 48.16 – V C57
2021-02-03 11:34:07 s 1 -86604.729 0 +379096.02 9990.0 – C57
2021-02-03 11:44:07 S 05 05 10.968 -77 42 01.76 – V C57
2021-02-03 11:44:07 s 1 -86929.597 0 +378955.13 7280.0 – C57
2021-02-03 11:54:07 S 05 05 07.358 -77 42 16.06 – V C57
2021-02-03 11:54:07 s 1 -87254.252 0 +378813.31 4250.0 – C57
2021-02-03 12:04:07 S 05 05 03.893 -77 42 30.53 – V C57
2021-02-03 12:04:07 s 1 -87578.694 0 +378670.58 910.0 – C57
2021-02-03 12:14:07 S 05 05 00.067 -77 42 45.04 – V C57
2021-02-03 12:14:07 s 1 -87902.921 0 +378526.93 7250.0 – C57
2021-02-03 12:24:07 S 05 04 56.302 -77 43 00.23 – V C57
2021-02-03 12:24:07 s 1 -88226.933 0 +378382.36 3270.0 – C57
2021-02-03 12:34:07 S 05 04 52.291 -77 43 13.33 – V C57
2021-02-03 12:34:07 s 1 -88550.729 0 +378236.88 8960.0 – C57
2021-02-03 12:44:07 S 05 04 48.696 -77 43 27.77 – V C57
2021-02-03 12:44:07 s 1 -88874.308 0 +378090.47 4330.0 – C57
2021-02-03 12:54:07 S 05 04 44.770 -77 43 42.02 – V C57
2021-02-03 12:54:07 s 1 -89197.668 0 +377943.15 9380.0 – C57
2021-02-03 13:04:07 S 05 04 41.011 -77 43 57.50 – V C57
2021-02-03 13:04:07 s 1 -89520.810 0 +377794.90 4100.0 – C57
2021-02-03 13:14:07 S 05 04 37.788 -77 44 10.54 – V C57
2021-02-03 13:14:07 s 1 -89843.732 0 +377645.74 8500.0 – C57
2021-02-03 13:24:07 S 05 04 34.044 -77 44 25.87 – V C57
2021-02-03 13:24:07 s 1 -90166.433 0 +377495.66 2560.0 – C57
2021-02-03 13:34:07 S 05 04 30.480 -77 44 39.59 – V C57
2021-02-03 13:34:07 s 1 -90488.913 0 +377344.66 6290.0 – C57
2021-02-03 13:44:07 S 05 04 26.496 -77 44 53.38 – V C57
2021-02-03 13:44:07 s 1 -90811.170 0 +377192.74 9690.0 – C57
2021-02-03 13:54:07 S 05 04 22.968 -77 45 08.35 – 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)