2018 XA4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS

Orbital Elements

Epoch (TDB)	2025-11-21 (JD 2461000.5)
Eccentricity (e)	0.4034310256 ± 2.00e+00
Semi-major axis (a)	1.1200386857 AU ± 3.00e+00
Inclination (i)	2.28716454° ± 4.00e+00
Long. of Asc. Node (Ω)	81.39604837° ± 5.00e+00
Arg. of Perihelion (ω)	260.96375161° ± 6.00e+00
Mean Anomaly (M)	358.98155132° ± 1.54e-01
Mean Motion (n)	0.8314751300°/day ± 3.34e+00
Perihelion dist (q)	0.66816740 AU ± 2.87e+00
Aphelion dist (Q)	1.57192820 AU ± 4.77e+00
Orbital Period	1.18537250 yr ± 4.76e+00

Physical Parameters

H (abs. magnitude)	29.00
G (slope)	0.15

Orbit Solution

Source	IAA
Solution Date	2026-04-18
RMS Residual	0.449″
Uncertainty	3
Orbit Type	Apollo
MOID	0.001448 AU
Observations Used	18
Oppositions	1
Arc Total	2018-2018
First Observation Used	—
Last Observation Used	2018-12-15

Observations (18)

Date	Type	RA	Dec	Mag	Band	Observatory
2018-12-13 06:29:51	C	04 13 56.17	+19 17 37.2	–	V	G96
2018-12-13 06:37:49	C	04 14 01.69	+19 19 19.6	–	V	G96
2018-12-13 06:45:49	C	04 14 07.14	+19 21 03.0	–	V	G96
2018-12-13 06:53:47	C	04 14 12.53	+19 22 44.1	–	V	G96
2018-12-13 08:38:36	C	04 15 22.24	+19 43 35.8	–	V	I52
2018-12-13 08:39:40	C	04 15 23.05	+19 43 47.5	–	V	I52
2018-12-13 08:40:44	C	04 15 23.74	+19 43 58.9	–	V	I52
2018-12-13 09:45:21	C	04 16 06.38	+19 55 40.5	–	V	I52
2018-12-13 09:46:57	C	04 16 07.42	+19 55 57.9	–	V	I52
2018-12-13 09:48:33	C	04 16 08.49	+19 56 14.9	–	V	I52
2018-12-13 09:50:09	C	04 16 09.56	+19 56 31.4	–	V	I52
2018-12-14 06:20:29	C	04 27 23.60	+22 31 31.5	–	V	I52
2018-12-14 06:25:17	C	04 27 24.73	+22 31 55.0	–	V	I52
2018-12-14 06:30:04	C	04 27 25.91	+22 32 19.1	–	V	I52
2018-12-15 00:07:16	C	04 32 19.15	+23 39 43.7	–	V	L01
2018-12-15 00:10:38	C	04 32 19.71	+23 39 52.9	–	V	L01
2018-12-15 00:17:22	C	04 32 20.76	+23 40 13.4	–	V	L01
2018-12-15 11:01:44	C	04 34 30.859	+24 11 24.32	–	V	F51