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
2021-06-26 04:34:00 S 19 32 26.376 +37 34 03.18 V C57
2021-06-26 04:34:00 s 1 +171224.60 5 +89647.208 4340.0 C57
2021-06-26 04:44:01 S 19 32 25.375 +37 34 05.23 V C57
2021-06-26 04:44:01 s 1 +171389.07 7 +90560.627 8790.0 C57
2021-06-26 04:54:00 S 19 32 24.398 +37 34 05.70 V C57
2021-06-26 04:54:00 s 1 +171550.44 3 +91472.411 4660.0 C57
2021-06-26 05:04:01 S 19 32 23.698 +37 34 05.45 V C57
2021-06-26 05:04:01 s 1 +171708.72 7 +92382.557 2040.0 C57
2021-06-26 05:14:00 S 19 32 22.714 +37 34 08.90 V C57
2021-06-26 05:14:00 s 1 +171863.95 1 +93291.062 970.0 C57
2021-06-26 05:24:01 S 19 32 21.785 +37 34 09.84 V C57
2021-06-26 05:24:01 s 1 +172016.13 9 +94197.925 1530.0 C57
2021-06-26 05:34:00 S 19 32 20.897 +37 34 04.91 V C57
2021-06-26 05:34:00 s 1 +172165.31 2 +95103.142 3780.0 C57
2021-06-26 05:54:01 S 19 32 19.150 +37 34 06.06 V C57
2021-06-26 05:54:01 s 1 +172454.70 3 +96908.632 3600.0 C57
2021-06-26 06:14:01 S 19 32 17.162 +37 34 08.54 V C57
2021-06-26 06:14:01 s 1 +172732.29 9 +98707.519 920.0 C57
2021-06-26 06:24:00 S 19 32 16.476 +37 34 08.72 V C57
2021-06-26 06:24:00 s 1 +172866.72 8 +99604.481 2550.0 C57
2021-06-26 07:47:19 C 19 32 47.05 +37 33 32.3 q H06
2021-06-26 07:54:00 S 19 32 08.424 +37 34 08.36 V C57
2021-06-26 07:54:00 s 1 +173949.24 8 +107602.47 6960.0 C57
2021-06-26 08:06:11 C 19 32 45.42 +37 33 35.1 q H06
2021-06-26 08:21:36 C 19 32 43.98 +37 33 36.9 q H06
2021-06-26 09:04:00 S 19 32 01.915 +37 34 16.97 V C57
2021-06-26 09:04:00 s 1 +174639.03 7 +113729.91 7990.0 C57
2021-06-26 09:14:01 S 19 32 01.022 +37 34 15.24 V C57
2021-06-26 09:14:01 s 1 +174727.13 9 +114598.58 2360.0 C57
2021-06-26 09:24:00 S 19 31 59.981 +37 34 19.13 V C57
2021-06-26 09:24:00 s 1 +174812.68 7 +115465.59 9730.0 C57
2021-06-26 09:34:01 S 19 31 59.100 +37 34 16.72 V C57
2021-06-26 09:34:01 s 1 +174895.69 7 +116330.93 150.0 C57
2021-06-26 09:54:00 S 19 31 57.338 +37 34 20.21 V C57
2021-06-26 09:54:00 s 1 +175054.17 6 +118056.61 340.0 C57
2021-06-26 10:04:00 S 19 31 56.383 +37 34 18.91 V C57
2021-06-26 10:04:00 s 1 +175129.67 9 +118916.95 200.0 C57
2021-06-26 10:14:00 S 19 31 55.567 +37 34 18.37 V C57
2021-06-26 10:14:00 s 1 +175202.71 5 +119775.61 3310.0 C57
2021-06-26 10:24:01 S 19 31 54.749 +37 34 17.62 V C57
2021-06-26 10:24:01 s 1 +175273.29 9 +120632.61 9720.0 C57
2021-06-26 10:34:00 S 19 31 53.724 +37 34 18.26 V C57
2021-06-26 10:34:00 s 1 +175341.45 0 +121487.95 9460.0 C57
2021-06-26 10:44:01 S 19 31 53.076 +37 34 19.20 V C57
2021-06-26 10:44:01 s 1 +175407.18 3 +122341.61 2600.0 C57
2021-06-26 10:54:00 S 19 31 52.236 +37 34 18.77 V C57
2021-06-26 10:54:00 s 1 +175470.51 5 +123193.61 9170.0 C57
2021-06-26 11:04:01 S 19 31 50.945 +37 34 22.51 V C57
2021-06-26 11:04:01 s 1 +175531.46 3 +124043.95 9220.0 C57
2021-06-26 11:14:00 S 19 31 50.143 +37 34 22.58 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)