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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3 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):
Occultation UUID [and DB] : cdf7c82c-d480-46f9-9243-85fa17f763c4 [observed]
Occultation Date + Time : 2022-08-17 at 21:10:10 UT +/- 0.03 min [1]
Object Designation : (909) Ulla
Orbit Class : MBA
Star Designation : GDR3 6880157903024303104
Star Coordinates (ICRF) : RA = 20 19 32.0795, DE = -11 52 18.944 [2]
Star Magnitudes : G = 14.38 mag, RP = 13.72 mag, BP = 14.89 mag
Object Magnitude : V = 13.86 mag
Estimated Magnitude Drop : 0.5 mag
Estimated Max. Duration : 8.6 sec
Object Mean Diameter : 116 km (src: astorb)
Speed of the shadow : 13.5 km/s
Elongation to Moon & Sun : 96° (sunlit = 63%), Sun = 158°
Cross-track uncertainty : 1.0 mas = 1 km = 0.02 path-width (1-sig)
RUWE and duplicate source : 1.01 mas, dup.src = 0 (0:false, 1:true)
Ephemeris Reference : JPL#128
[1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0