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
2021-01-02 22:14:08 S 06 50 13.078 -54 24 54.43 V C57
2021-01-02 22:14:08 s 1 +140483.93 3 +256564.77 5500.0 C57
2021-01-02 22:24:08 S 06 50 12.554 -54 25 18.44 V C57
2021-01-02 22:24:08 s 1 +140270.79 1 +257146.04 8350.0 C57
2021-01-02 22:34:08 S 06 50 12.036 -54 25 42.78 V C57
2021-01-02 22:34:08 s 1 +140056.85 3 +257725.84 90.0 C57
2021-01-02 22:44:08 S 06 50 11.590 -54 26 06.29 V C57
2021-01-02 22:44:08 s 1 +139842.12 2 +258304.18 750.0 C57
2021-01-02 22:54:08 S 06 50 10.802 -54 26 31.24 V C57
2021-01-02 22:54:08 s 1 +139626.60 4 +258881.06 330.0 C57
2021-01-02 23:04:08 S 06 50 10.222 -54 26 54.17 V C57
2021-01-02 23:04:08 s 1 +139410.30 2 +259456.49 8830.0 C57
2021-01-02 23:14:08 S 06 50 09.828 -54 27 19.19 V C57
2021-01-02 23:14:08 s 1 +139193.22 2 +260030.47 6270.0 C57
2021-01-02 23:24:08 S 06 50 09.242 -54 27 41.26 V C57
2021-01-02 23:24:08 s 1 +138975.36 7 +260603.00 2640.0 C57
2021-01-02 23:34:08 S 06 50 08.573 -54 28 06.53 V C57
2021-01-02 23:34:08 s 1 +138756.74 3 +261174.09 7950.0 C57
2021-01-02 23:44:08 S 06 50 07.985 -54 28 30.58 V C57
2021-01-02 23:44:08 s 1 +138537.35 2 +261743.73 2210.0 C57
2021-01-02 23:54:08 S 06 50 07.481 -54 28 54.01 V C57
2021-01-02 23:54:08 s 1 +138317.20 0 +262311.94 5430.0 C57
2021-01-03 00:04:08 S 06 50 06.948 -54 29 18.56 V C57
2021-01-03 00:04:08 s 1 +138096.29 1 +262878.70 7610.0 C57
2021-01-03 00:14:08 S 06 50 06.228 -54 29 42.50 V C57
2021-01-03 00:14:08 s 1 +137874.62 9 +263444.03 8760.0 C57
2021-01-03 00:24:08 S 06 50 05.678 -54 30 06.30 V C57
2021-01-03 00:24:08 s 1 +137652.21 8 +264007.93 8880.0 C57
2021-01-03 00:34:08 S 06 50 05.035 -54 30 30.49 V C57
2021-01-03 00:34:08 s 1 +137429.06 2 +264570.40 7970.0 C57
2021-01-03 00:44:08 S 06 50 04.570 -54 30 53.78 V C57
2021-01-03 00:44:08 s 1 +137205.16 6 +265131.44 6060.0 C57
2021-01-03 00:54:08 S 06 50 03.972 -54 31 18.30 V C57
2021-01-03 00:54:08 s 1 +136980.53 4 +265691.05 3130.0 C57
2021-01-03 01:04:08 S 06 50 03.283 -54 31 41.45 V C57
2021-01-03 01:04:08 s 1 +136755.17 0 +266249.25 9200.0 C57
2021-01-03 01:14:08 S 06 50 02.722 -54 32 06.36 V C57
2021-01-03 01:14:08 s 1 +136529.07 7 +266806.02 4280.0 C57
2021-01-03 01:24:08 S 06 50 02.153 -54 32 29.51 V C57
2021-01-03 01:24:08 s 1 +136302.26 1 +267361.38 8360.0 C57
2021-01-03 01:34:08 S 06 50 01.709 -54 32 53.99 V C57
2021-01-03 01:34:08 s 1 +136074.72 4 +267915.32 1450.0 C57
2021-01-03 01:44:08 S 06 50 00.962 -54 33 17.46 V C57
2021-01-03 01:44:08 s 1 +135846.47 1 +268467.86 3560.0 C57
2021-01-03 01:54:08 S 06 50 00.382 -54 33 41.76 V C57
2021-01-03 01:54:08 s 1 +135617.50 6 +269018.98 4700.0 C57
2021-01-03 02:04:08 S 06 49 59.873 -54 34 04.87 V C57
2021-01-03 02:04:08 s 1 +135387.83 3 +269568.70 4870.0 C57
2021-01-03 02:14:08 S 06 49 59.386 -54 34 29.28 V C57
2021-01-03 02:14:08 s 1 +135157.45 6 +270117.01 4080.0 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)