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
2003-01-14 07:03:15 C 08 31 24.48 +26 42 41.1 c 711
2003-01-14 07:07:14 C 08 31 22.80 +26 42 37.9 c 711
2003-01-15 07:10:15 C 08 21 52.21 +26 22 04.3 15.9 c 704
2003-01-15 07:24:55 C 08 21 46.09 +26 21 55.0 c 711
2003-01-15 07:29:32 C 08 21 44.23 +26 21 50.9 c 711
2003-01-15 07:31:35 C 08 21 43.58 +26 21 45.8 16.5 c 704
2003-01-15 07:34:15 C 08 21 42.31 +26 21 46.8 c 711
2003-01-15 07:38:14 C 08 21 40.71 +26 21 43.3 c 711
2003-01-15 07:52:59 C 08 21 34.93 +26 21 26.8 16.2 c 704
2003-01-15 08:14:25 C 08 21 26.27 +26 21 07.4 16.5 c 704
2003-01-15 08:35:54 C 08 21 17.59 +26 20 48.5 16.5 c 704
2003-01-16 06:33:38 C 08 13 02.57 +26 00 33.5 c 670
2003-01-16 08:00:14 C 08 12 29.23 +25 59 14.2 c 670
2003-01-16 09:54:38 C 08 11 45.21 +25 57 23.3 c 670
2003-01-16 11:01:03 C 08 11 19.93 +25 56 17.0 c 670
2003-01-17 00:01:08 C 08 06 39.54 +25 43 21.2 c 084
2003-01-20 00:37:03 C 07 42 48.01 +24 29 02.7 c 084
2003-01-22 13:10:46 C 07 25 54.61 +23 26 00.6 17.4 c 608
2003-01-22 13:26:01 C 07 25 50.58 +23 25 43.6 17.2 c 608
2003-01-22 13:41:10 C 07 25 46.55 +23 25 27.0 17.3 c 608
2003-01-22 21:34:32 C 07 23 50.01 +23 17 00.4 d 560
2003-01-22 21:38:20 C 07 23 49.04 +23 16 58.8 d 560
2003-01-22 21:40:53 C 07 23 48.39 +23 16 54.4 d 560
2003-01-22 21:45:07 C 07 23 47.29 +23 16 50.7 d 560
2003-01-23 20:57:06 C 07 18 10.64 +22 53 03.9 d 170
2003-01-23 20:57:47 C 07 18 10.52 +22 53 03.2 d 170
2003-01-23 21:00:33 C 07 18 09.71 +22 53 00.3 d 170
2003-01-23 21:02:37 C 07 18 09.27 +22 52 59.4 d 170
2003-01-23 21:03:22 C 07 18 09.08 +22 52 57.4 d 170
2003-01-23 21:04:03 C 07 18 08.93 +22 52 56.5 d 170
2003-01-23 21:04:45 C 07 18 08.74 +22 52 55.6 d 170
2003-01-24 05:17:59 C 07 16 14.25 +22 44 42.2 c 670
2003-01-24 06:08:00 C 07 16 02.20 +22 43 53.0 c 670
2003-01-24 07:34:20 C 07 15 41.30 +22 42 26.1 c 670
2003-01-24 22:03:45 C 07 12 27.97 +22 27 41.6 c 127
2003-01-24 22:10:29 C 07 12 26.45 +22 27 34.9 c 127
2003-01-24 22:16:13 C 07 12 25.17 +22 27 29.8 c 127
2003-01-24 22:21:44 C 07 12 23.91 +22 27 24.0 c 127
2003-01-25 21:29:59 C 07 07 31.23 +22 04 46.0 c 587
2003-01-25 21:32:30 C 07 07 30.75 +22 04 43.4 c 587
2003-01-25 22:58:12 C 07 07 12.05 +22 03 17.8 d 560
2003-01-25 23:00:52 C 07 07 11.48 +22 03 17.1 d 560
2003-01-25 23:03:14 C 07 07 10.98 +22 03 14.2 d 560
2003-01-25 23:08:40 C 07 07 09.75 +22 03 09.0 d 560
2003-01-28 21:18:39 C 06 54 21.92 +20 58 30.9 d 560
2003-01-28 21:21:22 C 06 54 21.53 +20 58 29.2 d 560
2003-01-28 21:23:48 C 06 54 20.99 +20 58 26.2 d 560
2003-01-28 21:26:13 C 06 54 20.64 +20 58 24.0 d 560
2003-01-28 21:28:35 C 06 54 20.19 +20 58 21.4 d 560
2003-01-28 22:01:30 C 06 54 14.97 +20 57 57.8 c 176
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)