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
2021-01-07 15:24:08 s 1 -72800.645 0 +395242.77 6090.0 – C57
2021-01-07 15:34:08 S 06 42 05.887 -58 39 38.77 – V C57
2021-01-07 15:34:08 s 1 -73122.351 0 +395130.66 7170.0 – C57
2021-01-07 15:44:08 S 06 42 05.148 -58 39 59.94 – V C57
2021-01-07 15:44:08 s 1 -73443.891 0 +395017.68 8000.0 – C57
2021-01-07 15:54:08 S 06 42 04.478 -58 40 20.06 – V C57
2021-01-07 15:54:08 s 1 -73765.263 0 +394903.84 8590.0 – C57
2021-01-07 16:04:08 S 06 42 03.451 -58 40 43.10 – V C57
2021-01-07 16:04:08 s 1 -74086.468 0 +394789.15 8930.0 – C57
2021-01-07 16:14:08 S 06 42 02.698 -58 41 02.72 – V C57
2021-01-07 16:14:08 s 1 -74407.503 0 +394673.59 9030.0 – C57
2021-01-07 16:24:08 S 06 42 01.963 -58 41 24.29 – V C57
2021-01-07 16:24:08 s 1 -74728.368 0 +394557.17 8870.0 – C57
2021-01-07 16:34:08 S 06 42 01.008 -58 41 45.38 – V C57
2021-01-07 16:34:08 s 1 -75049.063 0 +394439.90 8460.0 – C57
2021-01-07 16:44:08 S 06 42 00.202 -58 42 06.23 – V C57
2021-01-07 16:44:08 s 1 -75369.586 0 +394321.76 7800.0 – C57
2021-01-07 16:54:08 S 06 41 59.441 -58 42 26.78 – V C57
2021-01-07 16:54:08 s 1 -75689.938 0 +394202.76 6890.0 – C57
2021-01-07 17:04:08 S 06 41 58.608 -58 42 48.13 – V C57
2021-01-07 17:04:08 s 1 -76010.116 0 +394082.90 5720.0 – C57
2021-01-07 17:14:08 S 06 41 57.713 -58 43 09.26 – V C57
2021-01-07 17:14:08 s 1 -76330.121 0 +393962.18 4300.0 – C57
2021-01-07 17:24:08 S 06 41 56.969 -58 43 29.39 – V C57
2021-01-07 17:24:08 s 1 -76649.952 0 +393840.59 2620.0 – C57
2021-01-07 17:34:08 S 06 41 56.196 -58 43 50.23 – V C57
2021-01-07 17:34:08 s 1 -76969.607 0 +393718.15 680.0 – C57
2021-01-07 17:44:08 S 06 41 55.214 -58 44 11.80 – V C57
2021-01-07 17:44:08 s 1 -77289.086 0 +393594.84 8490.0 – C57
2021-01-07 17:54:08 S 06 41 54.552 -58 44 31.81 – V C57
2021-01-07 17:54:08 s 1 -77608.389 0 +393470.68 6030.0 – C57
2021-01-07 18:04:08 S 06 41 53.688 -58 44 53.16 – V C57
2021-01-07 18:04:08 s 1 -77927.514 0 +393345.65 3310.0 – C57
2021-01-07 18:14:08 S 06 41 52.646 -58 45 14.15 – V C57
2021-01-07 18:14:08 s 1 -78246.461 0 +393219.76 330.0 – C57
2021-01-07 18:24:08 S 06 41 51.866 -58 45 35.06 – V C57
2021-01-07 18:24:08 s 1 -78565.229 0 +393093.01 7090.0 – C57
2021-01-07 18:34:08 S 06 41 51.192 -58 45 55.76 – V C57
2021-01-07 18:34:08 s 1 -78883.817 0 +392965.40 3580.0 – C57
2021-01-07 18:44:08 S 06 41 50.244 -58 46 17.04 – V C57
2021-01-07 18:44:08 s 1 -79202.224 0 +392836.92 9800.0 – C57
2021-01-07 18:54:08 S 06 41 49.385 -58 46 37.78 – V C57
2021-01-07 18:54:08 s 1 -79520.449 0 +392707.59 5760.0 – C57
2021-01-07 19:04:08 S 06 41 48.655 -58 46 57.94 – V C57
2021-01-07 19:04:08 s 1 -79838.493 0 +392577.39 1440.0 – C57
2021-01-07 19:14:08 S 06 41 47.743 -58 47 19.36 – V C57
2021-01-07 19:14:08 s 1 -80156.354 0 +392446.33 6860.0 – C57
2021-01-07 19:24:08 S 06 41 46.970 -58 47 39.44 – V C57
2021-01-07 19:24:08 s 1 -80474.030 0 +392314.41 2010.0 – C57
2021-01-07 19:34:08 S 06 41 46.121 -58 48 00.72 – 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)