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] : 44dab222-b211-4fe5-bb94-770868a4b4b4 [observed]
Occultation Date + Time : 2012-02-18 at 16:36:13 UT +/- 0.03 min [1]
Object Designation : (177) Irma
Orbit Class : MBA
Star Designation : GDR3 3428778705725363328
Star Coordinates (ICRF) : RA = 05 40 15.7732, DE = +24 57 55.422 [2]
Star Magnitudes : G = 9.16 mag, RP = 8.77 mag, BP = 9.39 mag
Object Magnitude : V = 14.09 mag
Estimated Magnitude Drop : 4.9 mag
Estimated Max. Duration : 12.5 sec
Object Mean Diameter : 73 km (src: astorb)
Speed of the shadow : 5.9 km/s
Elongation to Moon & Sun : 155° (sunlit = 11%), Sun = 116°
Cross-track uncertainty : 0.7 mas = 0 km = 0.01 path-width (1-sig)
RUWE and duplicate source : 3.34 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