UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km |
More
3 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):
Q: model quality flag (0-5, 5=highest) | P: rotation period | λ,β: ecl. lon. and lat. of spin axis (J2000) | JD: initial time (epoch) | φ0: initial rotation angle for JD0
Image size: 300px. Transparent image background for copy & paste
Map with groundtrack and observer stations
Event Details
Occultation UUID [and DB] : 3313c729-420a-4aba-946d-3c175bde2910 [observed]
Occultation Date + Time : 2011-11-21 at 00:41:19 UT +/- 0.02 min [1]
Object Designation : (54) Alexandra
Orbit Class : MBA
Star Designation : GDR3 0891063709418748160
Star Coordinates (ICRF) : RA = 07 02 40.8321, DE = +33 29 00.846 [2]
Star Magnitudes : G = 12.7 mag, RP = 12.21 mag, BP = 13.03 mag
Object Magnitude : V = 13.12 mag
Estimated Magnitude Drop : 1.0 mag
Estimated Max. Duration : 22.6 sec
Object Mean Diameter : 166 km (src: astorb)
Speed of the shadow : 7.3 km/s
Elongation to Moon & Sun : 78° (sunlit = 24%), Sun = 134°
Cross-track uncertainty : 1.7 mas = 2 km = 0.02 path-width (1-sig)
RUWE and duplicate source : 1.2 mas, dup.src = 0 (0:false, 1:true)
Ephemeris Reference : JPL#197
Object is a Gaia mass determination target !
[1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0