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
2009-01-16 04:13:01 C 02 14 42.84 -06 29 12.6 n 645
2009-01-16 04:14:13 C 02 14 42.76 -06 29 16.7 n 645
2009-01-16 04:17:47 C 02 14 42.49 -06 29 29.4 n 645
2015-12-10 08:18:54 C 06 21 12.20 +44 01 46.6 q G96
2015-12-10 08:26:14 C 06 21 10.78 +44 01 34.5 q G96
2015-12-10 08:34:54 C 06 21 09.18 +44 01 20.2 q G96
2015-12-10 08:43:09 C 06 21 07.63 +44 01 06.6 q G96
2015-12-10 09:26:52 C 06 20 59.25 +43 59 51.9 t H01
2015-12-10 09:35:21 C 06 20 57.78 +43 59 38.9 q G96
2015-12-10 09:36:05 C 06 20 57.64 +43 59 37.6 q G96
2015-12-10 09:42:45 C 06 20 56.38 +43 59 26.6 q G96
2015-12-10 09:43:28 C 06 20 56.25 +43 59 25.3 q G96
2015-12-10 09:43:46 C 06 20 56.07 +43 59 23.4 t H01
2015-12-10 09:50:08 C 06 20 54.99 +43 59 13.9 q G96
2015-12-10 09:50:51 C 06 20 54.87 +43 59 12.8 q G96
2015-12-10 09:53:01 C 06 20 54.34 +43 59 07.7 t H01
2015-12-10 10:00:21 C 06 20 53.07 +43 58 56.7 q I52
2015-12-10 10:05:07 C 06 20 52.14 +43 58 48.7 q I52
2015-12-10 10:08:26 C 06 20 51.44 +43 58 41.6 t H01
2015-12-10 10:09:55 C 06 20 51.24 +43 58 40.4 q I52
2015-12-10 10:14:31 C 06 20 50.39 +43 58 32.6 q I52
2015-12-10 19:40:49 C 06 19 10.70 +43 42 15.8 19.3 t 104
2015-12-10 19:48:46 C 06 19 09.21 +43 42 02.9 19.1 t 104
2015-12-10 19:54:52 C 06 19 08.10 +43 41 52.1 19.5 t 104
2015-12-10 21:49:36 C 06 18 46.22 +43 38 35.1 q 246
2015-12-10 21:50:01 C 06 18 46.08 +43 38 34.7 q 246
2015-12-10 21:52:07 C 06 18 45.69 +43 38 33.0 q 246
2015-12-10 21:52:33 C 06 18 45.56 +43 38 30.9 q 246
2015-12-10 21:52:52 C 06 18 45.59 +43 38 29.8 q 246
2015-12-11 03:25:29 C 06 17 45.14 +43 28 40.3 t H01
2015-12-11 03:30:23 C 06 17 44.20 +43 28 31.8 t H01
2015-12-11 03:51:34 C 06 17 40.15 +43 27 55.2 t H01
2015-12-11 03:55:43 C 06 17 39.38 +43 27 48.1 t H01
2015-12-11 06:32:09 C 06 17 09.17 +43 23 14.4 u 926
2015-12-11 06:41:50 C 06 17 07.26 +43 22 57.4 u 926
2015-12-11 06:51:33 C 06 17 05.34 +43 22 39.6 u 926
2015-12-12 20:58:00 C 06 09 36.58 +42 07 29.4 q C77
2015-12-12 21:16:09 C 06 09 32.73 +42 06 51.6 q C77
2015-12-12 21:34:03 C 06 09 28.99 +42 06 14.9 q C77
2015-12-12 22:32:54 C 06 09 16.25 +42 04 10.6 t 595
2015-12-12 22:50:47 C 06 09 12.48 +42 03 32.6 t 595
2015-12-15 04:45:46 C 05 57 28.97 +39 54 10.7 u 926
2015-12-15 04:52:15 C 05 57 27.43 +39 53 53.6 u 926
2015-12-15 04:58:47 C 05 57 25.89 +39 53 36.2 u 926
2015-12-16 05:00:00 C 05 51 45.92 +38 46 02.2 u H21
2015-12-16 05:01:57 C 05 51 45.42 +38 45 56.6 u H21
2015-12-16 05:03:55 C 05 51 44.95 +38 45 50.9 u H21
2015-12-16 05:05:53 C 05 51 44.43 +38 45 45.1 u H21
2015-12-16 05:07:50 C 05 51 43.95 +38 45 39.3 u H21
2015-12-16 05:09:53 C 05 51 43.44 +38 45 33.3 u H21