2009 SG18

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6736774041 ± 1.45e-08
Semi-major axis (a)3.0389575465 AU ± 1.18e-08
Inclination (i)57.83485907° ± 8.14e-06
Long. of Asc. Node (Ω)177.38260873° ± 2.48e-06
Arg. of Perihelion (ω)204.63314021° ± 1.17e-05
Mean Anomaly (M)9.09145840° ± 1.53e-06
Mean Motion (n)0.1860481374°/day ± 1.08e-09
Perihelion dist (q)0.99168052 AU ± 4.44e-08
Aphelion dist (Q)5.08623458 AU ± 4.84e-08
Orbital Period5.29769498 yr ± 3.08e-08
Physical Parameters
H (abs. magnitude)17.67
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.265″
Uncertainty0
Orbit TypeApollo
MOID0.022941 AU
Observations Used287
Oppositions13
Arc Total2009-2025
First Observation Used2009-09-21
Last Observation Used2025-09-22
Observations (297)
Date Type RA Dec Mag Band Observatory
2009-10-01 01:24:38 C 18 01 54.37 +24 01 25.8 o H55
2009-10-01 02:44:13 C 18 02 01.59 +23 57 32.3 o 291
2009-10-01 02:49:56 C 18 02 02.09 +23 57 15.7 o 291
2009-10-01 02:55:49 C 18 02 02.63 +23 56 58.1 o 291
2009-10-03 21:44:09 C 18 08 15.87 +20 33 57.4 c 587
2009-10-03 21:53:57 C 18 08 16.72 +20 33 26.3 c 587
2009-10-09 02:35:58 C 18 20 43.37 +13 48 08.7 c 926
2009-10-09 02:39:52 C 18 20 43.76 +13 47 55.6 c 926
2009-10-09 02:43:45 C 18 20 44.16 +13 47 42.3 c 926
2009-10-14 03:10:52 C 18 33 42.98 +06 48 26.2 o 291
2009-10-19 00:50:10 C 18 47 16.09 -00 18 07.2 r H55
2009-10-19 00:52:10 C 18 47 16.40 -00 18 14.8 r H55
2009-10-29 02:19:15 C 19 17 33.98 -14 54 30.4 o 291
2009-10-29 02:30:42 C 19 17 35.49 -14 55 12.4 o 291
2009-11-06 00:02:15 C 19 43 30.95 -25 28 54.7 o H21
2009-11-06 00:12:24 C 19 43 32.39 -25 29 26.9 o H21
2009-11-06 00:14:20 C 19 43 32.66 -25 29 32.8 o H21
2011-04-03 10:35:10 C 11 25 50.297 +01 18 15.77 U T12
2011-04-03 10:45:33 C 11 25 49.994 +01 18 20.15 U T12
2011-04-03 10:55:59 C 11 25 49.664 +01 18 24.55 U T12
2014-05-27 02:25:23 C 16 35 38.71 +52 09 31.0 t 950
2014-05-27 02:26:56 C 16 35 38.63 +52 09 31.5 t 950
2014-05-27 02:30:46 C 16 35 38.42 +52 09 32.9 t 950
2014-05-27 02:36:07 C 16 35 38.11 +52 09 34.6 t 950
2025-05-22 23:38:22 C 21 14 22.078 +51 06 42.40 X 033
2025-05-22 23:43:39 C 21 14 22.438 +51 06 46.70 X 033
2025-05-22 23:48:57 C 21 14 22.848 +51 06 51.00 X 033
2025-05-22 23:54:13 C 21 14 23.226 +51 06 54.90 X 033
2025-07-19 23:10:23 C 23 01 29.13 +66 10 52.1 V K88
2025-07-19 23:26:32 C 23 01 30.52 +66 11 00.2 V K88
2025-07-31 00:36:43 C 23 28 32.43 +68 03 37.9 V 157
2025-07-31 00:59:24 C 23 28 34.92 +68 03 46.3 V 157
2025-07-31 01:22:04 C 23 28 37.39 +68 03 54.9 V 157
2025-08-13 23:41:34 C 00 16 11.143 +69 22 37.16 Z G19
2025-08-14 00:44:34 C 00 16 22.058 +69 22 42.38 Z G19
2025-08-14 01:47:36 C 00 16 32.983 +69 22 47.06 Z G19
2025-08-15 01:17:54 C 00 20 53.60 +69 23 55.2 V D48
2025-08-15 01:27:18 C 00 20 55.26 +69 23 55.3 V D48
2025-08-15 01:36:42 C 00 20 57.00 +69 23 55.7 V D48
2025-08-15 01:46:06 C 00 20 58.70 +69 23 56.1 V D48
2025-08-17 07:49:33 C 00 31 42.151 +69 23 02.80 V T08
2025-08-17 07:59:36 C 00 31 44.309 +69 23 02.83 V T08
2025-08-17 08:09:37 C 00 31 46.243 +69 23 02.33 V T08
2025-08-17 08:19:41 C 00 31 48.343 +69 23 02.33 V T08
2025-08-19 22:36:57 C 00 45 30.514 +69 14 46.64 V R17
2025-08-19 23:00:13 C 00 45 35.894 +69 14 42.86 V R17
2025-08-19 23:22:08 C 00 45 40.910 +69 14 40.06 V R17
2025-08-19 23:44:19 C 00 45 45.979 +69 14 36.53 V R17
2025-08-21 13:36:45 C 00 54 54.226 +69 04 51.02 V T05
2025-08-21 13:50:52 C 00 54 57.595 +69 04 46.24 V T05