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
2011-12-26 22:44:21 C 18 04 06.80 +66 34 43.4 u I15
2011-12-26 22:49:36 C 18 04 11.44 +66 36 01.4 u I15
2011-12-26 22:52:52 C 18 04 14.33 +66 36 50.3 u I15
2011-12-30 21:05:54 C 00 46 24.63 +81 43 00.9 d B66
2011-12-30 21:49:02 C 00 50 59.84 +81 37 20.8 d B66
2011-12-30 22:25:58 C 00 54 51.55 +81 32 19.0 d B66
2011-12-30 23:11:23 C 00 59 31.01 +81 25 55.5 d B66
2011-12-30 23:42:55 C 01 02 42.05 +81 21 23.0 d B66
2011-12-31 00:15:33 C 01 05 56.73 +81 16 34.7 d B66
2011-12-31 00:47:37 C 01 09 05.32 +81 11 45.6 d B66
2011-12-31 01:17:49 C 01 12 00.40 +81 07 08.3 d B66
2011-12-31 01:53:48 C 01 15 25.56 +81 01 34.1 d B66
2011-12-31 02:24:38 C 01 18 18.59 +80 56 43.7 d B66
2011-12-31 03:06:14 C 01 22 08.32 +80 50 05.0 d B66
2012-01-02 20:56:11 C 03 42 49.82 +67 45 50.3 t J84
2012-01-02 20:58:23 C 03 42 51.30 +67 45 24.6 t J84
2012-01-02 21:00:35 C 03 42 52.82 +67 44 58.7 t J84
2012-01-02 21:02:46 C 03 42 54.38 +67 44 32.7 t J84
2012-01-02 21:04:58 C 03 42 55.87 +67 44 06.8 t J84
2012-01-03 23:22:42 C 03 58 40.69 +62 47 45.6 u I15
2012-01-03 23:25:36 C 03 58 41.89 +62 47 15.2 u I15
2012-01-03 23:27:56 C 03 58 42.88 +62 46 50.7 u I15
2012-01-04 04:38:28 C 04 00 53.42 +61 52 33.9 r 703
2012-01-04 04:45:06 C 04 00 55.80 +61 51 24.4 r 703
2012-01-04 04:51:48 C 04 00 58.35 +61 50 13.7 r 703
2012-01-04 04:58:29 C 04 01 00.62 +61 49 04.5 r 703
2012-01-04 05:05:09 C 04 01 03.36 +61 47 54.3 r 703
2012-01-04 20:37:45 C 04 07 00.82 +59 10 10.1 d B66
2012-01-04 21:09:50 C 04 07 10.24 +59 04 55.4 d B66
2012-01-04 21:40:01 C 04 07 19.03 +58 59 59.9 d B66
2012-01-05 08:47:03 C 04 10 59.34 +57 14 19.7 u 379
2012-01-05 09:06:08 C 04 11 04.22 +57 11 27.9 u 379
2012-01-05 09:15:28 C 04 11 06.61 +57 10 03.3 u 379
2012-01-05 09:19:09 C 04 11 07.51 +57 09 30.3 u 379
2012-01-05 09:24:53 C 04 11 08.92 +57 08 39.0 u 379
2012-01-05 09:32:32 C 04 11 10.78 +57 07 30.2 u 379
2012-01-05 09:34:23 C 04 11 11.23 +57 07 13.5 u 379
2012-01-05 09:39:12 C 04 11 12.46 +57 06 29.6 u 379
2012-01-05 09:41:03 C 04 11 12.94 +57 06 13.1 u 379
2012-01-05 09:42:52 C 04 11 13.35 +57 05 56.7 u 379
2012-01-05 09:48:40 C 04 11 14.76 +57 05 04.2 u 379
2012-01-05 09:50:30 C 04 11 15.19 +57 04 47.7 u 379
2012-01-05 12:44:25 C 04 11 56.81 +56 38 28.4 o 300
2012-01-05 12:44:55 C 04 11 56.95 +56 38 23.2 o 300
2012-01-05 12:45:25 C 04 11 57.07 +56 38 19.1 o 300
2012-01-05 12:46:54 C 04 11 57.39 +56 38 05.2 o 300
2012-01-05 12:49:52 C 04 11 58.11 +56 37 38.1 o 300
2012-01-06 09:24:08 C 04 17 10.66 +53 38 59.2 u 379
2012-01-06 09:34:14 C 04 17 12.57 +53 37 38.0 u 379
2012-01-06 09:36:05 C 04 17 12.93 +53 37 23.0 u 379
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)