310842 (2003 AK18)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3842035592 ± 2.00e+00
Semi-major axis (a)0.8769785384 AU ± 3.00e+00
Inclination (i)7.40228421° ± 4.00e+00
Long. of Asc. Node (Ω)301.53854445° ± 5.00e+00
Arg. of Perihelion (ω)23.95386866° ± 6.00e+00
Mean Anomaly (M)64.71175149° ± 8.85e-06
Mean Motion (n)1.2001314814°/day ± 6.16e+00
Perihelion dist (q)0.54004026 AU ± 2.55e+00
Aphelion dist (Q)1.21391681 AU ± 4.51e+00
Orbital Period0.82126525 yr ± 4.21e+00
NGA Modelr2
A2-3.79610414e-06 AU/d²
Physical Parameters
H (abs. magnitude)19.78
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-28
RMS Residual0.315″
Uncertainty0
Orbit TypeAten
MOID0.056304 AU
Observations Used606
Oppositions5
Arc Total2003-2026
First Observation Used2003-01-07
Last Observation Used2026-01-12
Observations (639)
Date Type RA Dec Mag Band Observatory
2017-02-18 22:22:37 C 09 13 33.36 -02 30 08.8 o K95
2017-02-18 22:54:27 C 09 13 26.56 -02 30 44.9 q 160
2017-02-18 22:56:15 C 09 13 26.16 -02 30 44.2 q 160
2017-02-18 22:58:03 C 09 13 25.78 -02 30 43.4 q 160
2017-02-19 22:32:33 C 09 08 21.28 -02 23 32.0 q 160
2017-02-19 22:34:33 C 09 08 20.83 -02 23 31.4 q 160
2017-02-19 22:36:33 C 09 08 20.40 -02 23 31.0 q 160
2017-02-24 10:32:16 C 08 46 14.14 -01 45 05.5 L T05
2017-02-24 10:55:14 C 08 46 09.49 -01 44 55.5 L T05
2017-02-24 11:18:06 C 08 46 04.85 -01 44 46.8 L T05
2017-02-24 11:41:29 C 08 46 00.16 -01 44 38.2 L T05
2017-02-24 13:37:01 C 08 45 39.82 -01 44 00.5 q D29
2017-02-24 14:17:45 C 08 45 31.57 -01 43 44.3 q D29
2017-02-25 06:17:05 C 08 42 27.02 -01 37 29.5 q H45
2017-02-25 06:18:43 C 08 42 26.70 -01 37 28.6 q H45
2017-02-25 06:19:45 C 08 42 26.50 -01 37 28.5 q H45
2017-02-25 06:20:55 C 08 42 26.26 -01 37 28.0 q H45
2017-02-25 06:22:28 C 08 42 25.96 -01 37 27.4 q H45
2017-02-25 06:23:30 C 08 42 25.75 -01 37 26.9 q H45
2017-02-27 02:36:38 C 08 34 19.44 -01 19 36.0 R G45
2017-02-27 02:38:23 C 08 34 19.11 -01 19 35.4 R G45
2017-02-27 02:45:15 C 08 34 17.85 -01 19 32.7 R G45
2017-02-27 02:52:00 C 08 34 16.59 -01 19 29.7 R G45
2017-02-27 02:52:06 C 08 34 16.57 -01 19 29.5 R G45
2017-02-27 02:58:51 C 08 34 15.31 -01 19 27.0 R G45
2017-02-27 02:58:57 C 08 34 15.32 -01 19 26.7 R G45
2017-02-27 03:04:09 C 08 34 14.33 -01 19 24.7 R G45
2017-02-27 03:05:54 C 08 34 14.00 -01 19 24.1 R G45
2017-03-02 04:15:49 C 08 21 51.93 -00 48 50.2 q 703
2017-03-02 04:24:10 C 08 21 50.49 -00 48 46.4 q 703
2017-03-02 04:32:31 C 08 21 49.11 -00 48 43.1 q 703
2017-03-02 04:32:57 C 08 21 48.42 -00 48 44.6 q H45
2017-03-02 04:34:13 C 08 21 48.22 -00 48 43.8 q H45
2017-03-02 04:35:23 C 08 21 48.03 -00 48 43.4 q H45
2017-03-02 04:36:30 C 08 21 47.83 -00 48 42.9 q H45
2017-03-02 04:37:45 C 08 21 47.66 -00 48 42.5 q H45
2017-03-02 04:39:00 C 08 21 47.41 -00 48 41.9 q H45
2017-03-02 05:14:08 C 08 21 42.09 -00 48 25.8 q G96
2017-03-02 05:20:17 C 08 21 41.13 -00 48 23.2 q G96
2017-03-02 05:26:25 C 08 21 40.09 -00 48 20.5 q G96
2017-03-02 05:32:34 C 08 21 39.10 -00 48 18.5 q G96
2021-01-02 02:36:27 C 23 25 15.88 +17 54 08.2 V 703
2021-01-02 02:59:15 C 23 25 27.17 +17 54 47.2 V 703
2021-01-03 06:12:06 C 23 39 08.63 +18 42 15.8 V T08
2021-01-03 06:15:25 C 23 39 10.24 +18 42 21.1 V T08
2021-01-03 06:16:45 C 23 39 10.83 +18 42 22.5 V T08
2021-01-03 06:20:46 C 23 39 12.89 +18 42 28.8 V T08
2021-01-03 06:57:18 C 23 39 30.83 +18 43 28.0 V T08
2021-01-05 06:37:43 C 00 03 06.26 +19 54 49.3 V T05
2021-01-05 06:42:19 C 00 03 08.46 +19 54 55.2 V T05
Radar Observations (4)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2011-12-18 14:55:00 141593.549 0.2 Hz 2380 -1 -1
2011-12-18 15:25:00 87814903.72 0.5 us 2380 -1 -1
2011-12-18 15:25:00 140670.6971 0.2 Hz 2380 -1 -1
2011-12-29 03:40:00 -36324.799 4 Hz 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)