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
2020-12-26 09:04:08 S 06 57 13.788 -47 26 59.06 – V C57
2020-12-26 09:04:08 s 1 -135676.15 6 +353067.78 20.0 – C57
2020-12-26 09:14:08 S 06 57 13.481 -47 27 23.69 – V C57
2020-12-26 09:14:08 s 1 -135950.94 5 +352766.89 5970.0 – C57
2020-12-26 09:24:08 S 06 57 13.018 -47 27 47.20 – V C57
2020-12-26 09:24:08 s 1 -136225.37 0 +352465.06 1350.0 – C57
2020-12-26 09:34:08 S 06 57 12.343 -47 28 11.50 – V C57
2020-12-26 09:34:08 s 1 -136499.42 9 +352162.31 6170.0 – C57
2020-12-26 09:44:08 S 06 57 11.909 -47 28 35.65 – V C57
2020-12-26 09:44:08 s 1 -136773.12 2 +351858.62 420.0 – C57
2020-12-26 09:54:08 S 06 57 11.522 -47 29 00.10 – V C57
2020-12-26 09:54:08 s 1 -137046.44 7 +351554.00 4100.0 – C57
2020-12-26 10:04:08 S 06 57 10.992 -47 29 23.57 – V C57
2020-12-26 10:04:08 s 1 -137319.40 3 +351248.44 7210.0 – C57
2020-12-26 10:14:08 S 06 57 10.454 -47 29 47.65 – V C57
2020-12-26 10:14:08 s 1 -137591.98 8 +350941.95 9750.0 – C57
2020-12-26 10:24:08 S 06 57 10.008 -47 30 12.56 – V C57
2020-12-26 10:24:08 s 1 -137864.20 2 +350634.53 1710.0 – C57
2020-12-26 10:34:08 S 06 57 09.552 -47 30 35.17 – V C57
2020-12-26 10:34:08 s 1 -138136.04 2 +350326.17 3100.0 – C57
2020-12-26 10:44:08 S 06 57 09.154 -47 30 59.58 – V C57
2020-12-26 10:44:08 s 1 -138407.50 9 +350016.87 3910.0 – C57
2020-12-26 10:54:08 S 06 57 08.594 -47 31 24.10 – V C57
2020-12-26 10:54:08 s 1 -138678.59 9 +349706.63 4130.0 – C57
2020-12-26 11:04:08 S 06 57 08.150 -47 31 47.75 – V C57
2020-12-26 11:04:08 s 1 -138949.31 3 +349395.46 3780.0 – C57
2020-12-26 11:12:06 C 06 57 21.87 -47 18 06.0 – V T05
2020-12-26 11:14:08 S 06 57 07.668 -47 32 12.55 – V C57
2020-12-26 11:14:08 s 1 -139219.64 8 +349083.34 2840.0 – C57
2020-12-26 11:16:44 C 06 57 21.66 -47 18 17.3 – V T05
2020-12-26 11:24:08 S 06 57 07.238 -47 32 36.38 – V C57
2020-12-26 11:24:08 s 1 -139489.60 4 +348770.29 1320.0 – C57
2020-12-26 11:24:41 C 06 57 21.33 -47 18 36.6 – V T05
2020-12-26 11:34:08 S 06 57 06.770 -47 32 59.10 – V C57
2020-12-26 11:34:08 s 1 -139759.17 9 +348456.30 9200.0 – C57
2020-12-26 11:41:12 C 06 57 20.56 -47 19 16.8 – V T05
2020-12-26 12:04:08 S 06 57 05.304 -47 34 11.89 – V C57
2020-12-26 12:04:08 s 1 -140565.60 5 +347508.69 9320.0 – C57
2020-12-26 12:14:08 S 06 57 04.807 -47 34 35.33 – V C57
2020-12-26 12:14:08 s 1 -140833.64 3 +347190.94 4830.0 – C57
2020-12-26 12:24:08 S 06 57 04.332 -47 34 59.66 – V C57
2020-12-26 12:24:08 s 1 -141101.29 4 +346872.24 9750.0 – C57
2020-12-26 12:34:08 S 06 57 03.830 -47 35 23.82 – V C57
2020-12-26 12:34:08 s 1 -141368.55 6 +346552.61 4070.0 – C57
2020-12-26 12:44:08 S 06 57 03.410 -47 35 47.29 – V C57
2020-12-26 12:44:08 s 1 -141635.42 7 +346232.02 7780.0 – C57
2020-12-26 12:54:08 S 06 57 02.837 -47 36 10.87 – V C57
2020-12-26 12:54:08 s 1 -141901.90 7 +345910.50 900.0 – C57
2020-12-26 13:04:08 S 06 57 02.443 -47 36 36.32 – V C57
2020-12-26 13:04:08 s 1 -142167.99 4 +345588.03 3410.0 – 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)