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] : 83274c14-6b1e-4df8-a442-a963a353a57a [observed]
Occultation Date + Time : 2022-09-20 at 19:12:52 UT +/- 0.01 min [1]
Object Designation : (140) Siwa
Orbit Class : MBA
Star Designation : GDR3 6255387221137419520
Star Coordinates (ICRF) : RA = 15 33 46.1766, DE = -17 48 00.181 [2]
Star Magnitudes : G = 13.12 mag, RP = 12.39 mag, BP = 13.71 mag
Object Magnitude : V = 13.48 mag
Estimated Magnitude Drop : 1.0 mag
Estimated Max. Duration : 3.2 sec
Object Mean Diameter : 110 km (src: astorb)
Speed of the shadow : 34.7 km/s
Elongation to Moon & Sun : 116° (sunlit = 24%), Sun = 58°
Cross-track uncertainty : 2.0 mas = 3 km = 0.03 path-width (1-sig)
RUWE and duplicate source : 1.12 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