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
2018-12-16 01:05:12 C 05 29 39.15 +62 51 34.0 V Z80
2018-12-16 22:27:43 n 08 12 18.19 +38 41 08.0 q 619
2018-12-16 22:34:02 n 08 12 40.85 +38 33 48.9 q 619
2018-12-16 22:50:34 n 08 13 39.51 +38 14 38.1 q 619
2018-12-16 23:32:53 C 08 15 58.89 +37 22 40.8 V J95
2018-12-16 23:34:17 C 08 16 03.65 +37 21 03.7 V J95
2018-12-16 23:35:39 C 08 16 08.26 +37 19 29.6 V J95
2018-12-16 23:37:03 C 08 16 12.98 +37 17 52.9 V J95
2018-12-18 12:44:22 C 09 20 23.42 +08 47 56.0 V T05
2018-12-18 12:56:21 C 09 20 31.19 +08 42 34.8 V T05
2018-12-18 13:08:28 C 09 20 38.94 +08 37 12.8 V T05
2018-12-18 13:20:19 C 09 20 46.49 +08 31 58.8 V T05
2018-12-19 02:48:26 C 09 30 06.70 +03 28 17.9 V G40
2018-12-19 03:28:10 C 09 30 23.81 +03 15 53.4 V G40
2018-12-19 08:10:37 C 09 33 03.40 +01 52 06.5 V 703
2018-12-19 08:26:09 C 09 33 09.59 +01 47 47.1 V 703
2018-12-19 08:33:54 C 09 33 12.62 +01 45 39.2 V 703
2018-12-19 12:37:50 C 09 34 39.23 +00 41 12.1 V I52
2018-12-19 12:38:45 C 09 34 39.51 +00 40 58.2 V I52
2018-12-19 12:39:58 C 09 34 39.91 +00 40 40.2 V I52
2018-12-19 12:40:08 C 09 34 39.96 +00 40 37.5 V I52
2018-12-20 09:44:43 C 09 42 45.72 -03 38 35.7 V I52
2018-12-20 09:44:59 C 09 42 45.77 -03 38 37.8 V I52
2018-12-20 09:45:15 C 09 42 45.83 -03 38 40.7 V I52
2018-12-20 09:45:31 C 09 42 45.89 -03 38 43.0 V I52
2018-12-30 06:19:38 C 10 03 45.13 -15 36 09.8 u 807
2018-12-30 06:35:51 C 10 03 44.89 -15 36 24.3 u 807
2018-12-30 06:52:03 C 10 03 44.64 -15 36 38.8 u 807
2019-01-13 04:54:59 C 10 01 52.37 -17 01 38.6 U 807
2019-01-13 05:16:56 C 10 01 51.60 -17 01 37.1 U 807
2019-01-13 05:38:41 C 10 01 50.84 -17 01 35.6 U 807
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)