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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4 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):
Q: model quality flag (0-5, 5=highest) | P: rotation period | λ,β: ecl. lon. and lat. of spin axis (J2000) | JD: initial time (epoch) | φ0: initial rotation angle for JD0
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Map with groundtrack and observer stations
Event Details
Occultation UUID [and DB] : 92f80d06-5509-409a-93c8-c2f95e89b94a [observed]
Occultation Date + Time : 2018-09-21 at 21:58:59 UT +/- 0.02 min [1]
Object Designation : (584) Semiramis
Orbit Class : MBA
Star Designation : GDR3 0219252862080040320
Star Coordinates (ICRF) : RA = 04 03 40.8003, DE = +35 57 03.679 [2]
Star Magnitudes : G = 11.31 mag, RP = 10.73 mag, BP = 11.73 mag
Object Magnitude : V = 11.5 mag
Estimated Magnitude Drop : 0.9 mag
Estimated Max. Duration : 6.9 sec
Object Mean Diameter : 54 km (src: astorb)
Speed of the shadow : 7.8 km/s
Elongation to Moon & Sun : 103° (sunlit = 91%), Sun = 112°
Cross-track uncertainty : 1.7 mas = 1 km = 0.03 path-width (1-sig)
RUWE and duplicate source : 1.25 mas, dup.src = 0 (0:false, 1:true)
Ephemeris Reference : JPL#111
[1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0
