2015 XK261

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5809405159 ± 5.04e-08
Semi-major axis (a)2.2479968517 AU ± 1.92e-08
Inclination (i)8.08693651° ± 5.18e-06
Long. of Asc. Node (Ω)208.72556350° ± 7.40e-05
Arg. of Perihelion (ω)318.52517172° ± 7.68e-05
Mean Anomaly (M)321.77752375° ± 1.58e-05
Mean Motion (n)0.2924278479°/day ± 3.74e-09
Perihelion dist (q)0.94204440 AU ± 1.14e-07
Aphelion dist (Q)3.55394930 AU ± 1.17e-07
Orbital Period3.37049392 yr ± 4.31e-08
Physical Parameters
H (abs. magnitude)21.46
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.248″
Uncertainty0
Orbit TypeApollo
MOID0.016865 AU
Observations Used61
Oppositions7
Arc Total2015-2025
First Observation Used2015-12-07
Last Observation Used2025-11-28
Observations (61)
Date Type RA Dec Mag Band Observatory
2015-12-07 14:05:35 C 08 35 21.828 -01 45 10.75 V F51
2015-12-07 14:22:25 C 08 35 23.943 -01 45 37.87 V F51
2015-12-07 14:39:17 C 08 35 26.064 -01 46 05.56 V F51
2015-12-07 14:56:08 C 08 35 28.181 -01 46 33.01 V F51
2015-12-08 13:24:59 C 08 38 26.926 -02 23 32.25 L F51
2015-12-08 13:43:02 C 08 38 29.245 -02 24 02.21 L F51
2015-12-08 14:01:03 C 08 38 31.566 -02 24 32.20 L F51
2015-12-09 12:05:02 C 08 41 30.792 -03 01 47.15 t 568
2015-12-09 12:06:55 C 08 41 31.043 -03 01 50.31 t 568
2015-12-09 12:08:48 C 08 41 31.288 -03 01 53.55 t 568
2015-12-10 09:08:44 C 08 44 24.66 -03 38 16.7 t H01
2015-12-10 09:22:42 C 08 44 26.53 -03 38 41.1 t H01
2015-12-10 09:33:32 C 08 44 27.98 -03 38 59.9 t H01
2015-12-10 09:46:26 C 08 44 29.72 -03 39 22.7 t H01
2015-12-11 14:17:31 C 08 48 31.32 -04 29 42.4 t 474
2015-12-11 14:22:35 C 08 48 32.03 -04 29 51.1 t 474
2015-12-11 14:27:38 C 08 48 32.75 -04 30 00.6 t 474
2015-12-14 07:40:28 C 08 58 12.33 -06 32 32.7 o 291
2015-12-14 07:52:21 C 08 58 14.11 -06 32 56.0 o 291
2015-12-16 12:15:52 C 09 06 28.64 -08 17 26.0 o 291
2015-12-16 12:22:38 C 09 06 29.69 -08 17 39.8 o 291
2015-12-17 12:56:36 C 09 10 32.42 -09 08 38.2 o 291
2015-12-17 12:58:54 C 09 10 32.81 -09 08 43.1 o 291
2015-12-17 13:01:14 C 09 10 33.18 -09 08 47.7 o 291
2015-12-18 07:39:08 C 09 13 43.08 -09 47 56.3 u 807
2015-12-18 07:42:32 C 09 13 43.66 -09 48 03.3 u 807
2015-12-23 06:08:13 C 09 35 34.79 -14 15 54.3 u 807
2015-12-23 06:16:05 C 09 35 36.28 -14 16 12.8 u 807
2015-12-23 06:24:10 C 09 35 37.84 -14 16 32.1 u 807
2015-12-29 06:06:59 C 10 07 16.92 -20 15 58.2 u 807
2015-12-29 06:13:19 C 10 07 18.43 -20 16 15.6 u 807
2015-12-29 06:19:41 C 10 07 19.92 -20 16 31.8 u 807
2016-01-04 14:29:46 C 10 48 39.45 -26 57 36.4 t 474
2016-01-04 14:32:21 C 10 48 40.22 -26 57 43.5 t 474
2016-01-04 14:34:54 C 10 48 41.01 -26 57 50.0 t 474
2016-01-04 14:37:30 C 10 48 41.77 -26 57 57.1 t 474
2016-01-07 14:02:47 C 11 11 16.880 -30 02 09.43 t 568
2016-01-07 14:04:17 C 11 11 17.357 -30 02 13.19 t 568
2016-01-07 14:07:26 C 11 11 18.377 -30 02 21.18 t 568
2016-01-09 06:50:12 C 11 25 08.84 -31 41 57.5 u 807
2016-01-09 06:53:26 C 11 25 09.93 -31 42 05.0 u 807
2016-01-09 06:56:59 C 11 25 11.13 -31 42 13.9 u 807
2016-01-10 13:39:12 C 11 36 03.66 -32 54 17.9 t 474
2016-01-10 13:52:47 C 11 36 08.51 -32 54 48.6 t 474
2016-01-10 13:59:34 C 11 36 10.89 -32 55 04.3 t 474
2016-01-13 06:29:36 C 12 00 11.30 -35 15 16.0 u 807
2016-01-13 06:42:33 C 12 00 16.17 -35 15 42.7 u 807
2016-01-13 06:55:03 C 12 00 20.86 -35 16 08.0 u 807
2016-01-16 05:53:51 C 12 28 19.89 -37 27 29.4 u 807
2016-01-16 06:00:08 C 12 28 22.39 -37 27 40.0 u 807