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
2022-10-23 08:41:08 C 08 02 06.814 -00 00 49.61 V W68
2022-10-23 08:49:44 C 08 02 07.776 -00 01 01.16 V W68
2022-10-24 13:31:36 C 08 05 25.222 -00 40 27.88 V T05
2022-10-24 14:18:12 C 08 05 30.442 -00 41 32.28 V T05
2022-10-24 14:22:45 C 08 05 30.977 -00 41 38.15 V T05
2022-10-24 14:47:34 C 08 05 33.785 -00 42 12.92 V T05
2022-10-25 11:22:12 C 08 07 56.147 -01 10 56.46 V 703
2022-10-25 11:32:23 C 08 07 57.299 -01 11 10.54 V 703
2022-10-25 11:42:33 C 08 07 58.418 -01 11 24.72 V 703
2022-10-25 11:52:42 C 08 07 59.574 -01 11 39.16 V 703
2022-10-26 14:15:47 C 08 11 03.252 -01 49 01.45 V T08
2022-10-26 14:37:22 C 08 11 05.707 -01 49 32.30 V T08
2022-10-26 14:57:44 C 08 11 08.035 -01 50 01.21 V T08
2022-10-26 15:14:35 C 08 11 09.941 -01 50 25.15 V T08
2022-10-29 11:22:57 C 08 19 09.944 -03 30 09.07 V G96
2022-10-29 11:30:23 C 08 19 10.816 -03 30 20.12 V G96
2022-10-29 11:37:48 C 08 19 11.680 -03 30 31.36 V G96
2022-10-29 11:45:14 C 08 19 12.533 -03 30 42.16 V G96
2022-10-30 14:47:41 C 08 22 25.483 -04 11 27.67 V T08
2022-10-30 14:52:20 C 08 22 26.028 -04 11 34.94 V T08
2022-10-30 15:15:29 C 08 22 28.757 -04 12 10.22 V T08
2022-10-30 15:23:36 C 08 22 29.698 -04 12 22.50 V T08
2022-10-31 08:04:00 C 08 24 29.599 -04 37 44.51 V W68
2022-10-31 08:08:33 C 08 24 30.120 -04 37 51.71 V W68
2022-10-31 08:19:41 C 08 24 31.462 -04 38 08.84 V W68
2022-10-31 08:34:04 C 08 24 33.158 -04 38 30.34 V W68
2022-10-31 08:45:49 C 08 24 34.558 -04 38 48.91 V W68
2022-10-31 10:36:45 C 08 24 47.905 -04 41 48.41 V 703
2022-10-31 10:44:23 C 08 24 48.884 -04 41 59.82 V 703
2022-10-31 10:52:04 C 08 24 49.770 -04 42 11.48 V 703
2022-10-31 10:59:45 C 08 24 50.663 -04 42 23.69 V 703
2022-11-01 14:07:00 C 08 28 06.869 -05 24 28.66 V T05
2022-11-01 14:12:12 C 08 28 07.488 -05 24 36.54 V T05
2022-11-01 14:22:03 C 08 28 08.626 -05 24 52.31 V T05
2022-11-01 14:37:47 C 08 28 10.498 -05 25 17.18 V T05
2022-11-04 07:55:32 C 08 36 09.924 -07 09 18.32 V W68
2022-11-04 07:59:26 C 08 36 10.402 -07 09 23.87 V W68
2022-11-04 08:14:02 C 08 36 12.187 -07 09 48.24 V W68
2022-11-07 14:11:40 C 08 45 58.584 -09 19 18.41 V T08
2022-11-07 14:16:19 C 08 45 59.186 -09 19 26.29 V T08
2022-11-07 14:30:57 C 08 46 01.027 -09 19 50.81 V T08
2022-11-07 14:42:56 C 08 46 02.484 -09 20 11.87 V T08
2022-11-10 01:41:03 C 08 53 37.661 -11 01 23.70 V M22
2022-11-10 01:46:31 C 08 53 38.398 -11 01 33.20 V M22
2022-11-10 01:57:03 C 08 53 39.785 -11 01 51.71 V M22
2022-11-10 02:15:53 C 08 53 42.214 -11 02 24.29 V M22
2022-11-11 13:05:48 C 08 58 16.274 -12 03 45.18 V T08
2022-11-11 13:11:07 C 08 58 16.944 -12 03 54.32 V T08
2022-11-11 13:25:43 C 08 58 18.818 -12 04 20.53 V T08
2022-11-11 13:37:40 C 08 58 20.383 -12 04 41.45 V T08
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)