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
2025-06-24 12:09:08 C 22 27 41.200 +28 39 18.71 X F52
2025-06-24 12:26:27 C 22 27 41.177 +28 39 30.12 X F52
2025-06-25 14:33:18 C 22 27 40.406 +28 56 21.52 V T08
2025-06-25 14:37:20 C 22 27 40.298 +28 56 24.40 V T08
2025-06-25 14:41:24 C 22 27 40.370 +28 56 26.41 V T08
2025-06-25 14:45:28 C 22 27 40.258 +28 56 29.18 V T08
2025-06-27 04:15:05 C 22 27 34.630 +29 20 07.91 V R17
2025-06-27 04:28:06 C 22 27 34.546 +29 20 16.19 V R17
2025-06-27 04:37:01 C 22 27 34.512 +29 20 21.59 V R17
2025-06-27 04:53:34 C 22 27 34.399 +29 20 32.28 V R17
2025-06-27 13:13:35 C 22 27 32.350 +29 25 42.96 V T05
2025-06-27 13:16:36 C 22 27 32.376 +29 25 45.26 V T05
2025-06-27 13:21:10 C 22 27 32.390 +29 25 48.50 V T05
2025-06-27 13:28:35 C 22 27 32.330 +29 25 51.82 V T05
2025-06-28 10:00:53 C 22 27 25.859 +29 38 26.16 V G96
2025-06-28 10:08:21 C 22 27 25.794 +29 38 30.80 V G96
2025-06-28 10:15:50 C 22 27 25.679 +29 38 35.63 V G96
2025-06-28 10:23:18 C 22 27 25.672 +29 38 40.09 V G96
2025-06-29 10:13:50 C 22 27 15.869 +29 53 01.39 V G96
2025-06-29 10:28:52 C 22 27 15.721 +29 53 10.50 V G96
2025-06-29 10:36:24 C 22 27 15.660 +29 53 14.89 V G96
2025-07-02 11:37:42 C 22 26 30.499 +30 35 25.26 V T05
2025-07-02 11:42:32 C 22 26 30.391 +30 35 28.00 V T05
2025-07-02 12:35:25 C 22 26 29.674 +30 35 56.87 V T05
2025-07-02 13:17:04 C 22 26 29.066 +30 36 20.77 V T05
2025-07-03 12:57:16 C 22 26 09.192 +30 49 23.81 V T08
2025-07-03 12:59:20 C 22 26 09.194 +30 49 23.66 V T08
2025-07-03 13:06:58 C 22 26 09.048 +30 49 27.70 V T08
2025-07-03 13:41:36 C 22 26 08.462 +30 49 47.28 V T08
2025-07-06 12:24:17 C 22 24 54.626 +31 26 44.95 V T05
2025-07-06 12:27:32 C 22 24 54.559 +31 26 47.08 V T05
2025-07-06 12:32:08 C 22 24 54.490 +31 26 48.70 V T05
2025-07-06 12:39:25 C 22 24 54.305 +31 26 52.98 V T05
2025-07-09 12:06:15 C 22 23 17.242 +32 01 05.81 V T05
2025-07-09 12:08:51 C 22 23 17.177 +32 01 07.46 V T05
2025-07-09 12:14:49 C 22 23 17.002 +32 01 10.70 V T05
2025-07-09 12:17:26 C 22 23 16.920 +32 01 11.68 V T05
2025-07-09 12:41:18 C 22 23 16.248 +32 01 22.33 V T05
2025-07-09 12:45:53 C 22 23 16.090 +32 01 24.78 V T05
2025-07-10 12:16:55 C 22 22 39.310 +32 11 56.11 V T05
2025-07-10 12:19:31 C 22 22 39.223 +32 11 57.62 V T05
2025-07-10 12:24:06 C 22 22 39.091 +32 11 59.10 V T05
2025-07-10 12:31:27 C 22 22 38.808 +32 12 02.48 V T05
2025-07-19 13:24:16 C 22 15 05.074 +33 29 43.26 V T08
2025-07-19 13:28:54 C 22 15 04.884 +33 29 44.70 V T08
2025-07-19 13:39:29 C 22 15 04.421 +33 29 47.29 V T08
2025-07-19 14:03:57 C 22 15 03.312 +33 29 53.56 V T08
2025-07-24 12:56:29 C 22 09 32.599 +33 55 26.54 V T05
2025-07-24 13:04:46 C 22 09 32.179 +33 55 27.98 V T05
2025-07-24 13:13:37 C 22 09 31.675 +33 55 29.60 V T05
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)