2021 XR4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4411596000
Semi-major axis (a)1.4953338000 AU
Inclination (i)5.95265000°
Long. of Asc. Node (Ω)258.79072000°
Arg. of Perihelion (ω)242.62469000°
Mean Anomaly (M)31.54324000°
Mean Motion (n)0.5390100600°/day
Perihelion dist (q)0.83565290 AU
Aphelion dist (Q)2.15501470 AU
Orbital Period1.82855160 yr
Physical Parameters
H (abs. magnitude)26.74
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.770″
Uncertainty7
Orbit TypeApollo
MOID0.004898 AU
Observations Used21
Oppositions1
Arc Total
First Observation Used
Last Observation Used2021-12-12
Observations (22)
Date Type RA Dec Mag Band Observatory
2021-12-08 05:24:52 C 03 21 25.90 +28 41 08.6 V G96
2021-12-08 05:32:57 C 03 21 23.34 +28 40 33.3 V G96
2021-12-08 05:41:02 C 03 21 20.91 +28 39 58.5 V G96
2021-12-08 07:32:55 C 03 20 46.25 +28 31 37.0 V I52
2021-12-08 07:35:11 C 03 20 45.55 +28 31 26.7 V I52
2021-12-08 07:37:27 C 03 20 44.85 +28 31 16.1 V I52
2021-12-08 07:39:43 C 03 20 44.17 +28 31 05.6 V I52
2021-12-09 02:19:26 C 03 15 41.91 +26 56 02.6 u H21
2021-12-09 02:20:12 C 03 15 47.38 +26 56 05.6 V I52
2021-12-09 02:21:13 C 03 15 46.92 +26 56 00.3 V I52
2021-12-09 02:21:27 C 03 15 41.16 +26 55 50.9 u H21
2021-12-09 02:22:14 C 03 15 46.56 +26 55 54.7 V I52
2021-12-09 02:23:15 C 03 15 46.20 +26 55 49.1 V I52
2021-12-09 02:29:30 C 03 15 38.14 +26 55 05.2 u H21
2021-12-12 01:47:08 C 02 35 39.51 +12 42 37.7 V I52
2021-12-12 01:47:22 C 02 35 39.23 +12 42 32.1 V I52
2021-12-12 01:47:37 C 02 35 38.99 +12 42 26.7 V I52
2021-12-12 01:47:51 C 02 35 38.71 +12 42 21.4 V I52
2021-12-12 02:17:44 C 02 34 54.29 +12 29 51.7 u H21
2021-12-12 02:20:01 C 02 34 51.70 +12 28 56.9 u H21
2021-12-12 02:22:17 C 02 34 49.10 +12 28 02.1 u H21
2021-12-12 02:24:38 C 02 34 46.43 +12 27 05.6 u H21