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
2003-01-11 03:37:05 C 09 03 35.10 +27 32 37.5 941
2003-01-11 08:32:24 C 09 01 25.33 +27 30 16.6 c 858
2003-01-11 08:35:45 C 09 01 23.74 +27 30 14.9 c 858
2003-01-11 08:39:15 C 09 01 22.14 +27 30 13.1 c 858
2003-01-11 23:16:14 C 08 54 55.69 +27 21 48.9 d 557
2003-01-11 23:45:23 C 08 54 42.52 +27 21 32.2 d 557
2003-01-12 00:12:55 C 08 54 31.13 +27 21 26.0 941
2003-01-12 00:14:10 C 08 54 30.58 +27 21 25.5 941
2003-01-12 00:15:25 C 08 54 30.01 +27 21 24.9 941
2003-01-12 00:16:16 C 08 54 28.55 +27 21 14.2 d 557
2003-01-12 00:16:41 C 08 54 29.45 +27 21 24.3 941
2003-01-12 00:17:55 C 08 54 28.83 +27 21 23.6 941
2003-01-12 00:45:38 C 08 54 15.28 +27 20 56.9 d 557
2003-01-12 01:15:18 C 08 54 01.90 +27 20 38.7 d 557
2003-01-12 01:45:35 C 08 53 48.23 +27 20 20.0 d 557
2003-01-12 01:45:50 C 08 53 48.97 +27 20 32.2 939
2003-01-12 01:47:19 C 08 53 48.25 +27 20 31.5 939
2003-01-12 01:48:50 C 08 53 47.53 +27 20 31.0 939
2003-01-12 02:15:08 C 08 53 34.92 +27 20 01.1 d 557
2003-01-12 02:41:14 C 08 53 23.23 +27 19 44.2 d 557
2003-01-12 03:02:33 C 08 53 14.07 +27 19 42.0 d 170
2003-01-12 03:04:01 C 08 53 13.38 +27 19 41.2 d 170
2003-01-12 03:06:20 C 08 53 12.43 +27 19 39.6 d 170
2003-01-12 03:07:04 C 08 53 12.08 +27 19 39.4 d 170
2003-01-12 03:07:48 C 08 53 11.73 +27 19 38.5 d 170
2003-01-12 03:10:01 C 08 53 10.68 +27 19 37.1 d 170
2003-01-12 03:15:41 C 08 53 07.81 +27 19 21.6 d 557
2003-01-12 03:46:09 C 08 52 54.24 +27 19 01.2 d 557
2003-01-12 04:15:49 C 08 52 41.06 +27 18 41.2 d 557
2003-01-12 04:46:01 C 08 52 27.67 +27 18 20.0 d 557
2003-01-12 19:34:33 C 08 46 11.14 +27 08 42.9 c 151
2003-01-12 19:35:24 C 08 46 10.77 +27 08 42.2 c 151
2003-01-12 19:37:39 C 08 46 09.82 +27 08 41.1 c 151
2003-01-12 19:40:29 C 08 46 08.62 +27 08 39.0 c 151
2003-01-12 19:41:12 C 08 46 08.31 +27 08 38.5 c 151
2003-01-12 19:42:49 C 08 46 07.58 +27 08 37.4 c 151
2003-01-12 19:43:29 C 08 46 07.27 +27 08 37.5 c 151
2003-01-12 19:44:17 C 08 46 06.95 +27 08 36.9 c 151
2003-01-12 19:46:09 C 08 46 06.19 +27 08 35.9 c 151
2003-01-12 19:46:47 C 08 46 05.90 +27 08 35.3 c 151
2003-01-12 20:02:44 C 08 45 58.96 +27 08 24.8 c 240
2003-01-12 20:13:33 C 08 45 54.26 +27 08 18.3 c 240
2003-01-12 20:21:41 C 08 45 50.76 +27 08 13.4 c 240
2003-01-12 21:23:15 C 08 45 24.22 +27 07 36.8 c 469
2003-01-12 21:29:14 C 08 45 21.62 +27 07 33.1 c 469
2003-01-12 21:33:59 C 08 45 19.49 +27 07 30.0 c 469
2003-01-12 21:40:09 C 08 45 16.82 +27 07 26.3 c 469
2003-01-12 21:47:05 C 08 45 13.82 +27 07 21.9 c 469
2003-01-14 06:54:02 C 08 31 28.37 +26 42 48.2 c 711
2003-01-14 06:58:36 C 08 31 26.46 +26 42 44.7 c 711
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)