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
2012-02-16 22:59:43 C 05 24 50.59 +19 22 00.3 d B66
2013-02-17 09:06:43 C 14 49 46.57 -31 31 50.9 u 807
2013-02-17 09:10:58 C 14 49 47.17 -31 31 57.4 u 807
2013-02-17 09:15:35 C 14 49 47.82 -31 32 04.5 u 807
2013-02-17 09:20:02 C 14 49 48.44 -31 32 11.3 u 807
2013-02-17 09:24:27 C 14 49 49.07 -31 32 18.0 u 807
2016-12-24 11:31:19 C 11 48 07.07 +04 00 39.4 q G96
2016-12-24 11:41:51 C 11 48 07.04 +04 00 33.8 q G96
2016-12-24 11:48:05 C 11 48 06.98 +04 00 30.2 q G96
2017-01-02 13:59:43 C 11 45 57.447 +02 01 12.32 L F51
2017-01-02 14:16:39 C 11 45 56.969 +02 01 03.38 L F51
2017-01-02 14:33:33 C 11 45 56.488 +02 00 54.39 L F51
2017-01-02 14:50:34 C 11 45 56.005 +02 00 45.34 L F51
2017-01-09 11:41:35 C 11 40 21.46 +00 35 37.1 q 703
2017-01-09 11:48:23 C 11 40 21.11 +00 35 32.7 q 703
2017-01-09 11:55:08 C 11 40 20.70 +00 35 30.5 q 703
2017-01-09 12:01:53 C 11 40 20.31 +00 35 27.1 q 703
2017-01-23 09:39:26 C 11 13 44.70 -01 52 35.1 R G45
2017-01-23 09:46:18 C 11 13 43.85 -01 52 37.4 R G45
2017-01-23 09:53:21 C 11 13 42.95 -01 52 40.1 R G45
2017-01-23 09:59:48 C 11 13 42.15 -01 52 42.6 R G45
2017-01-23 10:08:27 C 11 13 41.05 -01 52 45.9 R G45
2017-01-23 10:14:38 C 11 13 40.27 -01 52 48.0 R G45
2017-01-26 03:29:19 C 11 05 21.57 -02 15 24.1 q 160
2017-01-26 03:32:17 C 11 05 21.19 -02 15 25.4 q 160
2017-01-26 03:35:16 C 11 05 20.76 -02 15 27.1 q 160
2017-01-27 02:56:48 C 11 02 05.82 -02 22 45.8 q 160
2017-01-27 02:59:49 C 11 02 05.52 -02 22 46.2 q 160
2017-01-27 14:18:43 C 11 00 27.40 -02 26 00.9 L T05
2017-01-27 14:39:02 C 11 00 24.33 -02 26 06.6 L T05
2017-01-27 14:58:21 C 11 00 21.40 -02 26 11.3 L T05
2017-01-27 15:27:20 C 11 00 16.90 -02 26 20.4 L T05
2017-01-27 15:51:44 C 11 00 13.18 -02 26 26.6 L T05
2017-01-29 13:10:03 C 10 53 21.039 -02 38 55.62 L F51
2017-01-29 13:28:55 C 10 53 17.885 -02 39 00.42 L F51
2017-01-29 14:06:38 C 10 53 11.577 -02 39 09.97 L F51
2017-01-31 08:18:18 C 10 46 17.54 -02 49 11.1 q 703
2017-01-31 08:25:25 C 10 46 16.29 -02 49 12.4 q 703
2017-01-31 08:32:31 C 10 46 15.04 -02 49 14.0 q 703
2017-01-31 08:39:59 C 10 46 13.72 -02 49 15.9 q 703
2017-01-31 13:29:48 C 10 45 23.34 -02 50 11.4 L T05
2017-01-31 13:56:54 C 10 45 18.50 -02 50 16.5 L T05
2017-01-31 14:18:19 C 10 45 14.63 -02 50 21.1 L T05
2017-01-31 14:41:40 C 10 45 10.48 -02 50 25.4 L T05
2017-02-01 06:09:00 C 10 42 32.24 -02 53 38.4 V G45
2017-02-01 06:11:56 C 10 42 31.73 -02 53 38.9 V G45
2017-02-01 07:07:33 C 10 42 21.58 -02 53 50.0 V G45
2017-02-01 08:05:48 C 10 42 10.92 -02 54 01.1 V G45
2017-02-01 09:14:15 C 10 41 58.28 -02 54 14.3 V G45
2017-02-01 10:12:03 C 10 41 47.62 -02 54 25.0 V G45
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)