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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2 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):
Occultation UUID [and DB] : f28e8610-7f08-4228-a73f-4c7844107053 [observed]
Occultation Date + Time : 2011-10-03 at 04:59:13 UT +/- 0.01 min [1]
Object Designation : (177) Irma
Orbit Class : MBA
Star Designation : GDR3 3426712753438863616
Star Coordinates (ICRF) : RA = 06 12 29.3100, DE = +25 01 45.856 [2]
Star Magnitudes : G = 12.42 mag, RP = 11.88 mag, BP = 12.78 mag
Object Magnitude : V = 13.93 mag
Estimated Magnitude Drop : 1.8 mag
Estimated Max. Duration : 5.1 sec
Object Mean Diameter : 73 km (src: astorb)
Speed of the shadow : 14.2 km/s
Elongation to Moon & Sun : 175° (sunlit = 40%), Sun = 97°
Cross-track uncertainty : 0.7 mas = 0 km = 0.01 path-width (1-sig)
RUWE and duplicate source : 1.01 mas, dup.src = 0 (0:false, 1:true)
Ephemeris Reference : JPL#115
[1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0