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] : d75483dc-3629-4012-9aac-00c59403bb8a [observed]
Occultation Date + Time : 2019-07-15 at 22:01:34 UT +/- 0.01 min [1]
Object Designation : (177) Irma
Orbit Class : MBA
Star Designation : GDR3 4110803466424633728
Star Coordinates (ICRF) : RA = 17 23 27.4727, DE = -25 07 54.087 [2]
Star Magnitudes : G = 14.72 mag, RP = 13.62 mag, BP = 15.99 mag
Object Magnitude : V = 14.12 mag
Estimated Magnitude Drop : 0.5 mag
Estimated Max. Duration : 7.8 sec
Object Mean Diameter : 73 km (src: astorb)
Speed of the shadow : 9.4 km/s
Elongation to Moon & Sun : 20° (sunlit = 99%), Sun = 149°
Cross-track uncertainty : 0.7 mas = 1 km = 0.01 path-width (1-sig)
RUWE and duplicate source : 1.05 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