UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km |
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1 observation found in db: euraster
Available (probably) matching predictions (click on the link to switch):
Occultation UUID [and DB] : 8a04c70f-3e10-4e45-b18f-868bb7fb0e23 [observed]
Occultation Date + Time : 2021-04-02 at 22:22:11 UT +/- 0.51 min [1]
Object Designation : (140) Siwa
Orbit Class : MBA
Star Designation : GDR3 0660852362840624768
Star Coordinates (ICRF) : RA = 08 52 20.9438, DE = +20 05 01.686 [2]
Star Magnitudes : G = 14.18 mag, RP = 13.6 mag, BP = 14.54 mag
Object Magnitude : V = 14.07 mag
Estimated Magnitude Drop : 0.7 mag
Estimated Max. Duration : 345.2 sec
Object Mean Diameter : 110 km (src: astorb)
Speed of the shadow : 0.3 km/s
Elongation to Moon & Sun : 134° (sunlit = 67%), Sun = 117°
Cross-track uncertainty : 1.1 mas = 2 km = 0.02 path-width (1-sig)
RUWE and duplicate source : 5.27 mas, dup.src = 0 (0:false, 1:true)
Ephemeris Reference : JPL#175
[1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0