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
2021-01-06 13:04:08 s 1 -20374.836 0 +402139.35 8510.0 – C57
2021-01-06 13:14:08 S 06 44 13.214 -57 43 30.25 – V C57
2021-01-06 13:14:08 s 1 -20713.605 0 +402163.69 4590.0 – C57
2021-01-06 13:24:08 S 06 44 12.485 -57 43 51.13 – V C57
2021-01-06 13:24:08 s 1 -21052.323 0 +402187.15 590.0 – C57
2021-01-06 13:44:08 S 06 44 10.982 -57 44 35.66 – V C57
2021-01-06 13:44:08 s 1 -21729.604 0 +402231.46 2360.0 – C57
2021-01-06 13:54:08 S 06 44 10.166 -57 44 56.72 – V C57
2021-01-06 13:54:08 s 1 -22068.165 0 +402252.30 8130.0 – C57
2021-01-06 14:04:08 S 06 44 09.302 -57 45 19.04 – V C57
2021-01-06 14:04:08 s 1 -22406.672 0 +402272.26 3810.0 – C57
2021-01-06 14:14:08 S 06 44 08.561 -57 45 38.95 – V C57
2021-01-06 14:14:08 s 1 -22745.125 0 +402291.35 9420.0 – C57
2021-01-06 14:24:08 S 06 44 07.884 -57 46 01.67 – V C57
2021-01-06 14:24:08 s 1 -23083.522 0 +402309.57 4940.0 – C57
2021-01-06 14:34:08 S 06 44 06.953 -57 46 23.02 – V C57
2021-01-06 14:34:08 s 1 -23421.864 0 +402326.92 380.0 – C57
2021-01-06 14:44:08 S 06 44 06.158 -57 46 45.26 – V C57
2021-01-06 14:44:08 s 1 -23760.148 0 +402343.39 5740.0 – C57
2021-01-06 14:54:08 S 06 44 05.434 -57 47 07.15 – V C57
2021-01-06 14:54:08 s 1 -24098.375 0 +402358.99 1010.0 – C57
2021-01-06 15:04:08 S 06 44 04.644 -57 47 29.15 – V C57
2021-01-06 15:04:08 s 1 -24436.544 0 +402373.72 6200.0 – C57
2021-01-06 15:14:08 S 06 44 03.838 -57 47 49.96 – V C57
2021-01-06 15:14:08 s 1 -24774.654 0 +402387.58 1290.0 – C57
2021-01-06 15:24:08 S 06 44 03.142 -57 48 11.09 – V C57
2021-01-06 15:24:08 s 1 -25112.704 0 +402400.56 6300.0 – C57
2021-01-06 15:34:08 S 06 44 02.268 -57 48 33.23 – V C57
2021-01-06 15:34:08 s 1 -25450.693 0 +402412.67 1220.0 – C57
2021-01-06 15:44:08 S 06 44 01.397 -57 48 55.30 – V C57
2021-01-06 15:44:08 s 1 -25788.622 0 +402423.91 6050.0 – C57
2021-01-06 15:54:08 S 06 44 00.778 -57 49 16.03 – V C57
2021-01-06 15:54:08 s 1 -26126.489 0 +402434.28 790.0 – C57
2021-01-06 16:04:08 S 06 43 59.923 -57 49 37.67 – V C57
2021-01-06 16:04:08 s 1 -26464.293 0 +402443.78 5430.0 – C57
2021-01-06 16:14:08 S 06 43 59.028 -57 50 00.13 – V C57
2021-01-06 16:14:08 s 1 -26802.034 0 +402452.40 9990.0 – C57
2021-01-06 16:24:08 S 06 43 58.368 -57 50 21.05 – V C57
2021-01-06 16:24:08 s 1 -27139.710 0 +402460.16 4440.0 – C57
2021-01-06 16:34:08 S 06 43 57.600 -57 50 42.32 – V C57
2021-01-06 16:34:08 s 1 -27477.322 0 +402467.04 8810.0 – C57
2021-01-06 16:44:08 S 06 43 56.604 -57 51 05.15 – V C57
2021-01-06 16:44:08 s 1 -27814.869 0 +402473.06 3070.0 – C57
2021-01-06 16:54:08 S 06 43 55.956 -57 51 26.17 – V C57
2021-01-06 16:54:08 s 1 -28152.349 0 +402478.20 7240.0 – C57
2021-01-06 17:04:08 S 06 43 55.106 -57 51 46.91 – V C57
2021-01-06 17:04:08 s 1 -28489.762 0 +402482.48 1310.0 – C57
2021-01-06 17:14:08 S 06 43 54.377 -57 52 09.59 – V C57
2021-01-06 17:14:08 s 1 -28827.108 0 +402485.88 5280.0 – C57
2021-01-06 17:24:08 S 06 43 53.664 -57 52 30.61 – 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)