2018 XS4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5938293000
Semi-major axis (a)2.4489247000 AU
Inclination (i)6.38051000°
Long. of Asc. Node (Ω)266.02385000°
Arg. of Perihelion (ω)173.79717000°
Mean Anomaly (M)292.32245000°
Mean Motion (n)0.2571822100°/day
Perihelion dist (q)0.99468150 AU
Aphelion dist (Q)3.90316790 AU
Orbital Period3.83233220 yr
Physical Parameters
H (abs. magnitude)25.20
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.820″
Uncertainty4
Orbit TypeApollo
MOID0.011464 AU
Observations Used81
Radar Obs Used2
Oppositions1
Arc Total
First Observation Used
Last Observation Used2019-01-13
Observations (81)
Date Type RA Dec Mag Band Observatory
2018-12-13 05:01:15 C 23 14 24.008 +42 34 58.09 V F51
2018-12-13 05:37:02 C 23 14 49.460 +42 43 32.83 V F51
2018-12-13 05:55:28 C 23 15 02.855 +42 47 57.23 V F51
2018-12-14 07:26:03 C 23 52 17.00 +51 13 31.4 V T08
2018-12-14 07:38:42 C 23 52 43.99 +51 18 39.3 V T08
2018-12-14 07:49:37 C 23 53 07.55 +51 23 04.3 V T08
2018-12-14 08:04:15 C 23 53 39.74 +51 29 00.2 V T08
2018-12-14 08:15:54 C 23 54 05.80 +51 33 44.0 V T08
2018-12-14 17:50:24 C 00 25 15.78 +56 06 14.4 V L01
2018-12-14 17:51:14 C 00 25 18.98 +56 06 41.1 V L01
2018-12-14 17:54:57 C 00 25 32.75 +56 08 36.1 V L01
2018-12-14 18:08:47 C 00 26 30.94 +56 15 35.3 V 204
2018-12-14 18:11:48 C 00 26 42.35 +56 17 09.2 V 204
2018-12-14 18:14:55 C 00 26 54.28 +56 18 46.7 V 204
2018-12-14 18:18:57 C 00 27 09.66 +56 20 52.4 V 204
2018-12-14 18:21:48 C 00 27 20.58 +56 22 20.8 V 204
2018-12-14 22:04:46 C 00 43 38.89 +58 16 45.3 V J95
2018-12-14 22:05:11 C 00 43 40.98 +58 16 58.4 V J95
2018-12-14 22:05:39 C 00 43 43.19 +58 17 12.5 V J95
2018-12-14 22:14:03 C 00 44 24.45 +58 21 31.6 V J95
2018-12-14 22:51:46 C 00 47 19.69 +58 41 19.8 V C95
2018-12-14 23:00:34 C 00 48 05.38 +58 45 46.4 V C95
2018-12-14 23:09:23 C 00 48 51.43 +58 50 12.6 V C95
2018-12-14 23:18:11 C 00 49 38.07 +58 54 38.6 V C95
2018-12-14 23:44:10 C 00 51 56.85 +59 06 50.3 16.3 q 104
2018-12-14 23:48:51 C 00 52 23.23 +59 09 00.7 q 107
2018-12-14 23:53:45 C 00 52 50.55 +59 11 27.2 q 107
2018-12-14 23:57:39 C 00 53 12.49 +59 13 24.3 q 107
2018-12-14 23:58:20 C 00 53 15.90 +59 13 56.2 16.5 q 104
2018-12-15 09:43:34 C 02 08 36.25 +64 02 04.9 q H15
2018-12-15 09:52:23 C 02 10 06.83 +64 05 06.6 q H15
2018-12-15 10:01:12 C 02 11 38.25 +64 08 06.8 q H15
2018-12-15 10:52:50 C 02 23 40.42 +64 40 58.6 r P93
2018-12-15 10:53:40 C 02 23 49.16 +64 41 16.9 r P93
2018-12-15 10:54:29 C 02 23 57.71 +64 41 34.8 r P93
2018-12-15 16:40:49 C 03 37 00.92 +65 39 25.8 V 587
2018-12-15 16:42:18 C 03 37 20.93 +65 39 29.7 V 587
2018-12-15 16:43:47 C 03 37 41.08 +65 39 33.3 V 587
2018-12-15 19:41:09 C 04 18 16.31 +65 22 04.3 V J95
2018-12-15 19:42:02 C 04 18 28.43 +65 21 53.2 V J95
2018-12-15 19:43:13 C 04 18 44.79 +65 21 37.9 V J95
2018-12-16 00:47:15 C 05 25 56.91 +63 04 08.5 V Z80
2018-12-16 00:49:12 C 05 26 21.37 +63 02 47.2 V Z80
2018-12-16 00:51:12 C 05 26 46.20 +63 01 24.2 V Z80
2018-12-16 00:53:12 C 05 27 10.98 +63 00 00.8 V Z80
2018-12-16 00:55:09 C 05 27 35.09 +62 58 39.8 V Z80
2018-12-16 00:57:13 C 05 28 00.51 +62 57 13.3 V Z80
2018-12-16 00:59:13 C 05 28 25.20 +62 55 49.0 V Z80
2018-12-16 01:01:13 C 05 28 49.94 +62 54 24.3 V Z80
2018-12-16 01:03:09 C 05 29 13.77 +62 53 01.9 V Z80
Radar Observations (2)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2018-12-18 06:49:00 -107529.2708 0.5 Hz 2380 -1 -1
2018-12-18 07:13:00 12036972.99 4 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)