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):
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
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Map with groundtrack and observer stations
Event Details
Occultation UUID [and DB] : 0b39cf47-b266-4c1e-a5a7-85df712eed8a [observed]
Occultation Date + Time : 2021-12-18 at 03:36:17 UT +/- 0.01 min [1]
Object Designation : (54) Alexandra
Orbit Class : MBA
Star Designation : GDR3 3796667427997019648
Star Coordinates (ICRF) : RA = 11 26 26.6529, DE = -01 24 06.983 [2]
Star Magnitudes : G = 14.6 mag, RP = 14.06 mag, BP = 14.97 mag
Object Magnitude : V = 13.7 mag
Estimated Magnitude Drop : 0.4 mag
Estimated Max. Duration : 11.7 sec
Object Mean Diameter : 166 km (src: astorb)
Speed of the shadow : 14.2 km/s
Elongation to Moon & Sun : 98° (sunlit = 99%), Sun = 94°
Cross-track uncertainty : 2.7 mas = 5 km = 0.03 path-width (1-sig)
RUWE and duplicate source : 1.05 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
