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
2021-06-25 09:44:00 S 19 34 15.317 +37 32 31.92 V C57
2021-06-25 09:44:00 s 1 +124843.14 5 -21644.451 8220.0 C57
2021-06-25 09:54:01 S 19 34 14.170 +37 32 36.20 V C57
2021-06-25 09:54:01 s 1 +125582.81 0 -20638.066 4660.0 C57
2021-06-25 10:04:00 S 19 34 13.315 +37 32 37.97 V C57
2021-06-25 10:04:00 s 1 +126314.68 7 -19630.406 8700.0 C57
2021-06-25 10:14:01 S 19 34 12.226 +37 32 37.86 V C57
2021-06-25 10:14:01 s 1 +127038.83 4 -18621.552 530.0 C57
2021-06-25 10:24:01 S 19 34 11.258 +37 32 39.91 V C57
2021-06-25 10:24:01 s 1 +127755.31 2 -17611.579 330.0 C57
2021-06-25 10:34:01 S 19 34 10.234 +37 32 37.97 V C57
2021-06-25 10:34:01 s 1 +128464.17 8 -16600.562 8280.0 C57
2021-06-25 10:44:01 S 19 34 09.134 +37 32 40.74 V C57
2021-06-25 10:44:01 s 1 +129165.49 2 -15588.575 4560.0 C57
2021-06-25 10:48:42 C 19 34 30.37 +37 30 10.1 V T08
2021-06-25 10:51:21 C 19 34 30.15 +37 30 10.6 V T08
2021-06-25 11:04:54 C 19 34 28.98 +37 30 13.3 V T08
2021-06-25 11:12:20 C 19 34 28.31 +37 30 14.5 V T08
2021-06-25 11:14:00 S 19 34 06.427 +37 32 39.95 V C57
2021-06-25 11:14:00 s 1 +131224.71 0 -12547.496 5210.0 C57
2021-06-25 12:14:01 S 19 33 59.993 +37 32 49.56 V C57
2021-06-25 12:14:01 s 1 +135147.16 6 - 6448.265 5640.0 C57
2021-06-25 12:54:01 S 19 33 55.951 +37 32 58.56 V C57
2021-06-25 12:54:01 s 1 +137621.98 1 - 2374.727 5640.0 C57
2021-06-25 13:54:00 S 19 33 50.093 +37 33 01.73 V C57
2021-06-25 13:54:00 s 1 +141133.03 4 + 3738.017 2530.0 C57
2021-06-25 14:24:01 S 19 33 47.040 +37 33 06.30 V C57
2021-06-25 14:24:01 s 1 +142801.26 0 + 6792.683 7740.0 C57
2021-06-25 14:44:01 S 19 33 45.199 +37 33 08.21 V C57
2021-06-25 14:44:01 s 1 +143882.06 5 + 8827.697 2210.0 C57
2021-06-25 14:54:01 S 19 33 44.340 +37 33 07.24 V C57
2021-06-25 14:54:01 s 1 +144413.22 1 + 9844.654 3220.0 C57
2021-06-25 15:04:01 S 19 33 43.174 +37 33 10.87 V C57
2021-06-25 15:04:01 s 1 +144938.28 3 +10861.194 6950.0 C57
2021-06-25 15:14:01 S 19 33 41.952 +37 33 11.84 V C57
2021-06-25 15:14:01 s 1 +145457.30 2 +11877.278 3560.0 C57
2021-06-25 15:24:00 S 19 33 41.158 +37 33 09.40 V C57
2021-06-25 15:24:00 s 1 +145970.32 8 +12892.870 3190.0 C57
2021-06-25 15:34:01 S 19 33 40.152 +37 33 11.20 V C57
2021-06-25 15:34:01 s 1 +146477.41 4 +13907.936 5990.0 C57
2021-06-25 15:44:00 S 19 33 39.014 +37 33 15.19 V C57
2021-06-25 15:44:00 s 1 +146978.60 9 +14922.440 2120.0 C57
2021-06-25 15:54:01 S 19 33 38.246 +37 33 13.57 V C57
2021-06-25 15:54:01 s 1 +147473.96 2 +15936.349 1730.0 C57
2021-06-25 16:44:01 S 19 33 33.134 +37 33 18.86 V C57
2021-06-25 16:44:01 s 1 +149864.83 2 +20995.857 6920.0 C57
2021-06-25 16:54:00 S 19 33 32.242 +37 33 19.44 V C57
2021-06-25 16:54:00 s 1 +150326.16 4 +22005.539 380.0 C57
2021-06-25 17:04:01 S 19 33 31.397 +37 33 24.73 V C57
2021-06-25 17:04:01 s 1 +150781.99 2 +23014.414 8320.0 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)