2015 XE261

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS

Orbital Elements

Epoch (TDB)	2025-11-21 (JD 2461000.5)
Eccentricity (e)	0.3938689461 ± 1.30e-04
Semi-major axis (a)	1.6307962499 AU ± 3.57e-04
Inclination (i)	7.92277926° ± 2.43e-03
Long. of Asc. Node (Ω)	76.81886136° ± 4.69e-04
Arg. of Perihelion (ω)	55.74965823° ± 4.77e-04
Mean Anomaly (M)	254.63822137° ± 5.59e-01
Mean Motion (n)	0.4732740801°/day ± 1.56e-04
Perihelion dist (q)	0.98847625 AU ± 3.03e-04
Aphelion dist (Q)	2.27311625 AU ± 5.41e-04
Orbital Period	2.08256975 yr ± 6.84e-04

Physical Parameters

H (abs. magnitude)	24.70
G (slope)	0.15

Orbit Solution

Source	IAA
Solution Date	2026-06-02
RMS Residual	0.399″
Uncertainty	3
Orbit Type	Apollo
MOID	0.074303 AU
Observations Used	17
Oppositions	1
Arc Total	2015-2016
First Observation Used	2015-12-07
Last Observation Used	2016-01-04

Observations (17)

Date	Type	RA	Dec	Mag	Band	Observatory
2015-12-07 11:10:20	C	04 15 59.705	+17 47 28.89	–	L	F51
2015-12-07 11:42:42	C	04 15 57.270	+17 48 26.19	–	L	F51
2015-12-07 11:58:50	C	04 15 56.060	+17 48 55.13	–	L	F51
2015-12-08 11:44:33	C	04 14 25.832	+18 33 20.77	–	t	568
2015-12-08 11:46:24	C	04 14 25.690	+18 33 24.36	–	t	568
2015-12-08 11:48:17	C	04 14 25.535	+18 33 27.85	–	t	568
2015-12-11 04:43:58	C	04 10 00.75	+20 48 25.6	–	o	926
2015-12-11 04:56:00	C	04 09 59.76	+20 48 53.6	–	o	926
2015-12-11 05:08:00	C	04 09 58.64	+20 49 21.1	–	o	926
2015-12-18 06:26:23	C	03 55 28.41	+28 33 00.2	–	o	926
2015-12-18 06:35:48	C	03 55 27.27	+28 33 30.2	–	o	926
2015-12-18 06:45:14	C	03 55 26.20	+28 34 00.7	–	o	926
2015-12-29 05:51:20	C	03 19 22.01	+47 06 18.2	–	o	926
2015-12-29 05:59:16	C	03 19 20.25	+47 06 58.0	–	o	926
2016-01-04 07:04:29	C	02 39 58.87	+60 20 18.8	–	t	705
2016-01-04 07:06:21	C	02 39 58.20	+60 20 27.2	–	t	705
2016-01-04 07:08:13	C	02 39 57.49	+60 20 36.9	–	t	705