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2026-02-20 / UCAC4 629-041023 / (54598) Bienor

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Deborah Smith O- VID M300 ES GPS 21:58:22 :: :: 22:00:22
2 show Deborah Smith O- VID M250 ES GPS 21:58:15 :: :: 22:00:15
3 show Michael OConnell O- VID M350 ES NTP 21:58:26 :: :: 22:00:26
4 show Javier Prat, Pedro Martorell O- CCD M310 ES GPS 21:57:03 :: :: 22:01:03
5 show Faustino Garcia O- CCD T250 ES GPS 21:56:07 :: :: 22:02:07
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

5 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#75 : dbd64370-f8eb-11ef-4809-b2a7ddd678e7 [db: cetnos]
JPL#76 : 11ac89b0-408a-11f0-4ed7-c902efbf882c [db: cetnos]

Using prediction dbd64370-f8eb-11ef-4809-b2a7ddd678e7 for map and profile fit

Get observations as KML file (reduced site location resolution)


Map with groundtrack and observer stations

Event Details
 Occultation UUID [and DB] : dbd64370-f8eb-11ef-4809-b2a7ddd678e7 [cetnos]

 Occultation Date + Time   : 2026-02-20 at 21:59:18 UT +/- 0.07 min  [1]
 Object Designation        : (54598) Bienor
 Orbit Class               : CEN
 Star Designation          : GDR3 0906682787486423936
 Star Coordinates (ICRF)   : RA = 07 57 16.4824, DE = +35 46 55.827  [2]
 Star Magnitudes           : G = 15.2 mag, RP = 14.65 mag, BP = 15.59 mag
 Object Magnitude          : V = 18.84 mag
 Estimated Magnitude Drop  : 3.7 mag
 Estimated Max. Duration   : 6.6 sec
 Object Mean Diameter      : 111.0 km  (src: CORA+astorb)
 Speed of the shadow       : 16.9 km/s
 Elongation to Moon & Sun  : 98° (sunlit = 13%), Sun = 140°
 Cross-track uncertainty   : 4.3 mas = 38 km = 0.35 path-width (1-sig)
 RUWE and duplicate source : 0.93 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#75

 Object is a "TNOs are cool" target !
[1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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