Collaborative Occultation Resources and Archive (CORA)

Occultations | Observations | Reports | Info + Credits | JOA | Admin | Login

Stellar Occultation by (54) Alexandra on 2023-08-14 (19:07:27 UT)

CTU: Cross-track uncertainty (zero means: use the nominal prediction value, see event details below). Offsets and CTU all in mas.


Event Details
 Occultation UUID [and db] : dcb42abb-cb08-408f-9756-59afa5fdba13 [observed]

 Occultation Date + Time   : 2023-08-14 at 19:07:27 UT +/- 0.06 min  [1]
 Object Designation        : (54) Alexandra
 Star Designation          : GDR3 6768390205298913152
 Star Coordinates (ICRF)   : RA = 19 42 30.1721, DE = -24 04 20.549  [2]
 Star Magnitudes           : G = 12.5 mag, RP = 11.9 mag, BP = 12.76 mag
 Object Magnitude          : V = 10.88 mag
 Estimated Magnitude Drop  : 0.2 mag
 Estimated Max. Duration   : 24.6 sec
 Object Mean Diameter      : 165.8 km  (src: astorb)
 Orbital Class             : MBA
 Speed of the shadow       : 6.7 km/s
 Elongation to Moon & Sun  : 169° (sunlit = 2%), Sun = 151°
 Cross-track uncertainty   : 9.0 mas = 8 km = 0.05 path-width (1-sig)
 RUWE and duplicate source : 1.01 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


More Data and Informations
SiMDA | 3D Asteroid Catalogue | Johnston Archive | Star at CDS (Vizier) | JPL Small-Body Node | Minor Planet Center | Wikipedia
(If error 404: link not valid which means no data available)


Interactive map



Aladin Sky Atlas
Aladin Lite direct link (has Gaia overlay)