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
2020-12-25 16:04:08 S 06 58 01.546 -46 45 43.67 – V C57
2020-12-25 16:04:08 s 1 -105949.19 3 +378946.87 310.0 – C57
2020-12-25 16:14:08 S 06 58 01.022 -46 46 07.90 – V C57
2020-12-25 16:14:08 s 1 -106255.08 1 +378738.71 5070.0 – C57
2020-12-25 16:24:08 S 06 58 00.475 -46 46 32.63 – V C57
2020-12-25 16:24:08 s 1 -106560.71 7 +378529.65 9430.0 – C57
2020-12-25 16:34:08 S 06 58 00.132 -46 46 57.25 – V C57
2020-12-25 16:34:08 s 1 -106866.10 1 +378319.71 3390.0 – C57
2020-12-25 16:44:08 S 06 57 59.719 -46 47 22.06 – V C57
2020-12-25 16:44:08 s 1 -107171.23 0 +378108.87 6940.0 – C57
2020-12-25 16:54:08 S 06 57 59.234 -46 47 46.14 – V C57
2020-12-25 16:54:08 s 1 -107476.10 5 +377897.15 80.0 – C57
2020-12-25 17:04:08 S 06 57 58.738 -46 48 11.41 – V C57
2020-12-25 17:04:08 s 1 -107780.72 4 +377684.53 2820.0 – C57
2020-12-25 17:14:08 S 06 57 58.435 -46 48 35.71 – V C57
2020-12-25 17:14:08 s 1 -108085.08 6 +377471.02 5150.0 – C57
2020-12-25 17:24:08 S 06 57 57.886 -46 48 59.44 – V C57
2020-12-25 17:24:08 s 1 -108389.19 1 +377256.62 7060.0 – C57
2020-12-25 17:34:08 S 06 57 57.370 -46 49 24.10 – V C57
2020-12-25 17:34:08 s 1 -108693.03 6 +377041.33 8560.0 – C57
2020-12-25 17:44:08 S 06 57 56.849 -46 49 47.89 – V C57
2020-12-25 17:44:08 s 1 -108996.62 3 +376825.14 9650.0 – C57
2020-12-25 17:54:08 S 06 57 56.573 -46 50 13.13 – V C57
2020-12-25 17:54:08 s 1 -109299.94 8 +376608.06 330.0 – C57
2020-12-25 18:04:08 S 06 57 56.074 -46 50 37.25 – V C57
2020-12-25 18:04:08 s 1 -109603.01 2 +376390.09 580.0 – C57
2020-12-25 18:14:08 S 06 57 54.991 -46 50 58.31 – V C57
2020-12-25 18:14:08 s 1 -109905.81 3 +376171.22 420.0 – C57
2020-12-25 18:24:08 S 06 57 55.582 -46 51 23.87 – V C57
2020-12-25 18:24:08 s 1 -110208.35 1 +375951.46 9840.0 – C57
2020-12-25 18:34:08 S 06 57 54.797 -46 51 52.74 – V C57
2020-12-25 18:34:08 s 1 -110510.62 4 +375730.80 8840.0 – C57
2020-12-25 18:54:08 S 06 57 53.630 -46 52 39.25 – V C57
2020-12-25 18:54:08 s 1 -111114.37 3 +375286.81 5570.0 – C57
2020-12-25 19:04:08 S 06 57 53.251 -46 53 03.88 – V C57
2020-12-25 19:04:08 s 1 -111415.84 6 +375063.47 3300.0 – C57
2020-12-25 19:14:08 S 06 57 52.771 -46 53 28.46 – V C57
2020-12-25 19:14:08 s 1 -111717.05 0 +374839.23 600.0 – C57
2020-12-25 19:24:08 S 06 57 52.399 -46 53 52.87 – V C57
2020-12-25 19:24:08 s 1 -112017.98 6 +374614.10 7480.0 – C57
2020-12-25 19:34:08 S 06 57 51.809 -46 54 16.09 – V C57
2020-12-25 19:34:08 s 1 -112318.65 0 +374388.07 3920.0 – C57
2020-12-25 19:44:08 S 06 57 51.365 -46 54 42.55 – V C57
2020-12-25 19:44:08 s 1 -112619.04 3 +374161.15 9940.0 – C57
2020-12-25 19:54:08 S 06 57 50.957 -46 55 05.70 – V C57
2020-12-25 19:54:08 s 1 -112919.16 3 +373933.33 5520.0 – C57
2020-12-25 20:04:08 S 06 57 50.460 -46 55 30.04 – V C57
2020-12-25 20:04:08 s 1 -113219.01 0 +373704.61 670.0 – C57
2020-12-25 20:14:08 S 06 57 49.930 -46 55 53.90 – V C57
2020-12-25 20:14:08 s 1 -113518.58 2 +373474.99 5380.0 – 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)