Stellar Occultation by (307261) 2002 MS4 on 2020-08-08 (20:44:09 UT)
Event Details
Occultation UUID [and db] : 98b8ab4b-412a-4e23-9608-39010d656231 [observed]
Occultation Date + Time : 2020-08-08 at 20:44:09 UT +/- 0.53 min [1]
Object Designation : (307261) 2002 MS4
Star Designation : GDR3 4253248324549054464
Star Coordinates (ICRF) : RA = 18 47 29.9638, DE = -06 16 31.473 [2]
Star Magnitudes : G = 14.62 mag, RP = 13.62 mag, BP = 15.64 mag
Object Magnitude : V = 20.39 mag
Estimated Magnitude Drop : 5.8 mag
Estimated Max. Duration : 31.6 sec
Object Mean Diameter : 648 km (src: astorb)
Orbital Class : TNO
Speed of the shadow : 20.5 km/s
Elongation to Moon & Sun : 95° (sunlit = 76%), Sun = 142°
Cross-track uncertainty : 14.3 mas = 475 km = 0.73 path-width (1-sig)
RUWE and duplicate source : 1.06 mas, dup.src = 0 (0:false, 1:true)
Ephemeris Reference : JPL#20
Object is a <TNOs are Cool> target !
[1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0