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
2018-12-06 01:14:39 s 1 -95587.895 0 +371023.86 7090.0 C57
2018-12-06 01:44:39 S 03 58 23.998 -09 53 53.05 V C57
2018-12-06 01:44:39 s 1 -96465.783 0 +370559.15 9310.0 C57
2018-12-06 02:14:39 S 03 58 21.494 -09 54 32.08 V C57
2018-12-06 02:14:39 s 1 -97341.359 0 +370086.02 8220.0 C57
2018-12-06 02:44:39 S 03 58 18.982 -09 55 14.30 V C57
2018-12-06 02:44:39 s 1 -98214.601 0 +369604.49 3690.0 C57
2018-12-06 03:14:39 S 03 58 16.524 -09 55 52.72 V C57
2018-12-06 03:14:39 s 1 -99085.485 0 +369114.55 5580.0 C57
2018-12-06 03:44:39 S 03 58 14.122 -09 56 31.63 V C57
2018-12-06 03:44:39 s 1 -99953.986 0 +368616.19 3760.0 C57
2018-12-06 04:14:39 S 03 58 11.599 -09 57 12.38 V C57
2018-12-06 04:14:39 s 1 -100820.08 0 +368109.41 8080.0 C57
2018-12-06 04:44:39 S 03 58 09.161 -09 57 52.16 V C57
2018-12-06 04:44:39 s 1 -101683.74 5 +367594.20 8410.0 C57
2018-12-06 05:14:39 S 03 58 06.662 -09 58 32.48 V C57
2018-12-06 05:14:39 s 1 -102544.95 4 +367070.57 4610.0 C57
2018-12-06 05:44:39 S 03 58 04.118 -09 59 12.41 V C57
2018-12-06 05:44:39 s 1 -103403.68 5 +366538.50 6530.0 C57
2018-12-06 06:14:39 S 03 58 01.634 -09 59 51.68 V C57
2018-12-06 06:14:39 s 1 -104259.91 3 +365997.99 4040.0 C57
2018-12-06 06:44:39 S 03 57 59.196 -10 00 32.29 V C57
2018-12-06 06:44:39 s 1 -105113.61 2 +365449.04 7000.0 C57
2018-12-06 07:14:39 S 03 57 56.683 -10 01 12.43 V C57
2018-12-06 07:14:39 s 1 -105964.75 8 +364891.64 5260.0 C57
2018-12-06 07:44:39 S 03 57 54.242 -10 01 51.96 V C57
2018-12-06 07:44:39 s 1 -106813.32 7 +364325.79 8680.0 C57
2018-12-06 08:14:39 S 03 57 51.751 -10 02 33.18 V C57
2018-12-06 08:14:39 s 1 -107659.29 3 +363751.47 7130.0 C57
2018-12-06 08:44:39 S 03 57 49.250 -10 03 12.92 V C57
2018-12-06 08:44:39 s 1 -108502.63 0 +363168.69 440.0 C57
2018-12-06 09:14:39 S 03 57 46.752 -10 03 52.20 V C57
2018-12-06 09:14:39 s 1 -109343.31 5 +362577.43 8490.0 C57
2018-12-06 09:44:39 S 03 57 44.441 -10 04 30.65 V C57
2018-12-06 09:44:39 s 1 -110181.30 8 +361977.58 1440.0 C57
2018-12-06 10:04:11 C 03 58 25.03 -10 04 10.0 U T05
2018-12-06 10:14:39 S 03 57 41.875 -10 05 11.98 V C57
2018-12-06 10:14:39 s 1 -111016.82 7 +361371.57 2720.0 C57
2018-12-06 10:17:15 C 03 58 23.92 -10 04 27.9 U T05
2018-12-06 10:29:22 C 03 58 22.92 -10 04 44.6 U T05
2018-12-06 10:42:20 C 03 58 21.83 -10 05 02.5 U T05
2018-12-06 10:44:39 S 03 57 39.391 -10 05 50.71 V C57
2018-12-06 10:44:39 s 1 -111849.39 4 +360754.88 4070.0 C57
2018-12-06 11:14:39 S 03 57 36.970 -10 06 30.49 V C57
2018-12-06 11:14:39 s 1 -112679.20 5 +360129.70 9570.0 C57
2018-12-06 11:44:39 S 03 57 34.428 -10 07 11.14 V C57
2018-12-06 11:44:39 s 1 -113506.23 3 +359496.00 9070.0 C57
2018-12-06 12:14:39 S 03 57 31.985 -10 07 50.95 V C57
2018-12-06 12:14:39 s 1 -114330.45 2 +358853.80 2420.0 C57
2018-12-06 12:44:39 S 03 57 29.695 -10 08 28.68 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)