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Stellar Occultation by (256415) 2007 BT9 on 2026-08-19 (22:40:49 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] : 3ab58eb0-d9ae-11f1-43f3-604dddbfeec2 [observed]

 Occultation Date + Time   : 2026-08-19 at 22:40:49 UT +/- 0.2 min  [1]
 Object Designation        : (256415) 2007 BT9
 Star Designation          : GDR3 2775841147271587072
 Star Coordinates (ICRF)   : RA = 00 37 39.3540, DE = +12 28 34.286  [2]
 Star Magnitudes           : G = 13.13 mag, RP = 12.63 mag, BP = 13.46 mag
 Object Magnitude          : V = 20.73 mag
 Estimated Magnitude Drop  : 7.6 mag
 Estimated Max. Duration   : 0.4 sec
 Speed of the shadow       : 5.9 km/s
 Object Mean Diameter      : 2.1 km  (src: astorb) => apparent = 1 mas
 Apparent Motion           : 0.2417 arcs/min @ PA = 311 deg
 Horizontal Parallax       : 4.3360 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 139° (sunlit = 49%), Sun = 133°
 Cross-track uncertainty   : 28.7 mas = 42 km = 20.10 path-width (1-sig)
 RUWE and duplicate source : 1.05 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL23
 Note                      : FP:true

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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