2015 XW261

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4668901848 ± 2.31e-08
Semi-major axis (a)1.2486842336 AU ± 9.76e-10
Inclination (i)29.67516663° ± 8.83e-06
Long. of Asc. Node (Ω)269.88916746° ± 1.98e-06
Arg. of Perihelion (ω)289.45619973° ± 4.72e-06
Mean Anomaly (M)341.81450469° ± 2.86e-06
Mean Motion (n)0.7063717691°/day ± 8.28e-10
Perihelion dist (q)0.66568582 AU ± 2.89e-08
Aphelion dist (Q)1.83168265 AU ± 2.89e-08
Orbital Period1.39533646 yr ± 1.64e-09
Physical Parameters
H (abs. magnitude)21.39
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.241″
Uncertainty0
Orbit TypeApollo
MOID0.114564 AU
Observations Used222
Oppositions4
Arc Total2009-2022
First Observation Used2009-01-16
Last Observation Used2022-12-30
Observations (231)
Date Type RA Dec Mag Band Observatory
2015-12-20 05:57:23 C 05 26 30.32 +32 57 24.9 u H21
2015-12-20 05:59:21 C 05 26 29.77 +32 57 16.7 u H21
2015-12-20 06:01:18 C 05 26 29.21 +32 57 08.0 u H21
2015-12-20 06:05:13 C 05 26 28.08 +32 56 51.2 u H21
2015-12-20 06:07:58 C 05 26 27.25 +32 56 39.2 u H21
2015-12-21 04:17:02 C 05 20 13.31 +31 17 17.0 o 926
2015-12-21 04:23:53 C 05 20 11.24 +31 16 46.1 o 926
2015-12-21 04:28:41 C 05 20 09.80 +31 16 23.4 o 926
2015-12-26 04:02:29 C 04 43 51.44 +19 52 48.4 u H21
2015-12-26 04:05:30 C 04 43 50.43 +19 52 27.9 u H21
2015-12-26 04:08:30 C 04 43 49.44 +19 52 07.5 u H21
2015-12-26 04:11:31 C 04 43 48.46 +19 51 47.1 u H21
2015-12-26 04:14:32 C 04 43 47.46 +19 51 26.7 u H21
2015-12-26 04:17:33 C 04 43 46.47 +19 51 06.3 u H21
2015-12-26 04:20:33 C 04 43 45.48 +19 50 46.3 u H21
2015-12-26 04:23:34 C 04 43 44.51 +19 50 25.9 u H21
2015-12-26 04:26:34 C 04 43 43.53 +19 50 05.5 u H21
2015-12-26 04:29:52 C 04 43 42.45 +19 49 42.9 u H21
2015-12-30 03:31:49 C 04 13 13.16 +08 02 41.9 u 807
2015-12-30 03:35:01 C 04 13 12.10 +08 02 16.7 u 807
2015-12-30 03:38:19 C 04 13 10.98 +08 01 50.3 u 807
2015-12-30 03:41:23 C 04 13 09.97 +08 01 25.8 u 807
2015-12-30 03:44:43 C 04 13 08.86 +08 00 59.2 u 807
2015-12-31 03:29:21 C 04 05 30.45 +04 49 25.3 u 807
2015-12-31 03:31:53 C 04 05 29.60 +04 49 04.6 u 807
2015-12-31 03:34:26 C 04 05 28.76 +04 48 43.9 u 807
2015-12-31 03:36:58 C 04 05 27.91 +04 48 23.4 u 807
2015-12-31 03:39:29 C 04 05 27.06 +04 48 03.0 u 807
2015-12-31 06:02:09 C 04 04 41.48 +04 27 45.8 u 926
2015-12-31 06:05:22 C 04 04 40.42 +04 27 19.7 u 926
2015-12-31 06:08:33 C 04 04 39.35 +04 26 54.1 u 926
2016-01-01 05:39:40 C 03 57 07.85 +01 14 36.2 o 926
2016-01-01 05:42:48 C 03 57 06.82 +01 14 10.3 o 926
2016-01-01 05:45:46 C 03 57 05.84 +01 13 46.3 o 926
2016-01-01 18:49:20 C 03 52 58.20 -00 33 26.8 q 246
2016-01-01 18:50:26 C 03 52 57.90 -00 33 36.2 q 246
2016-01-01 18:51:06 C 03 52 57.65 -00 33 41.4 q 246
2016-01-01 18:52:11 C 03 52 57.29 -00 33 49.9 q 246
2016-01-01 18:53:20 C 03 52 56.94 -00 33 58.7 q 246
2016-01-01 18:54:33 C 03 52 56.49 -00 34 09.9 q 246
2016-01-01 18:55:28 C 03 52 56.17 -00 34 16.8 q 246
2016-01-01 18:56:02 C 03 52 56.01 -00 34 21.8 q 246
2016-01-03 01:06:50 C 03 43 24.46 -04 38 58.8 u 807
2016-01-03 01:08:45 C 03 43 23.83 -04 39 13.8 u 807
2016-01-03 01:10:49 C 03 43 23.16 -04 39 30.9 u 807
2016-01-03 01:12:52 C 03 43 22.48 -04 39 47.5 u 807
2016-01-03 01:14:40 C 03 43 21.90 -04 40 02.1 u 807
2016-01-03 02:58:41 C 03 42 48.88 -04 55 02.9 u H21
2016-01-03 03:01:48 C 03 42 47.86 -04 55 28.3 u H21
2016-01-03 03:04:54 C 03 42 46.84 -04 55 53.2 u H21