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2026-07-29 / UCAC4 443-101542 / (1794) Finsen

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Chad Ellington O+ VID M254 NL GPS 20:53:39 20:54:36.913 20:54:40.917 20:55:39 0.401 0.401 4.00 44.4
2 show Konrad Guhl O+ CCD M306 DE GPS 20:52:47 20:53:47.6 20:53:52.3 20:55:00 0.300 0.300 4.70 52.2
3 show Anton Zhdanov O- VID M200 RU NTP 20:50:42 :: :: 20:53:25
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: sodis

Available (probably) matching predictions (click on the link to switch):
JPL75 : 138a6cf0-d9ab-11f1-43f3-12dcfeedd5e1 [db: observed]
JPL75 : f7737510-d9ab-11f1-43f3-48c3ecfd9d96 [db: observed]

Using prediction 138a6cf0-d9ab-11f1-43f3-12dcfeedd5e1 for map and profile fit

Get observations as KML file (reduced site location resolution)

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result:
Circular profile fit was not successful ...








You can enter space separated chord numbers (example: 11 4 8) or a method like VIS to ignore all visual timings, or a time source like RAD and NTP (but not GPS).
If the plot disappears, then there are less than 2 chords left (too much ignored, go back with browser).

Check SiMDA for size and mass data.

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Sky projection (artificial light) for occ. time: 2026-07-29, 20:53 UT (JD = 2461251.370)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 47251.012.347 3°, 65° 2.457222e64029.40.0° None2020-10-05 not scaled 2019-10-23
# 47261.012.346 169°, 35° 2.457222e64029.40.0° None2020-10-05 not scaled 2019-10-23
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] : 138a6cf0-d9ab-11f1-43f3-12dcfeedd5e1 [observed]

 Occultation Date + Time   : 2026-07-29 at 20:54:35 UT +/- 0.01 min  [1]
 Object Designation        : (1794) Finsen
 Orbit Class               : MBA
 Star Designation          : GDR3 4261509024061305984
 Star Coordinates (ICRF)   : RA = 19 14 09.2068, DE = -01 26 51.615  [2]
 Star Magnitudes           : G = 14.19 mag, RP = 13.31 mag, BP = 14.99 mag
 Object Magnitude          : V = 15.55 mag
 Estimated Magnitude Drop  : 1.6 mag
 Estimated Max. Duration   : 3.4 sec
 Object Mean Diameter      : 37.3 km  (src: astorb)
 Speed of the shadow       : 11.1 km/s
 Elongation to Moon & Sun  : 30° (sunlit = 100%), Sun = 154°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.04 path-width (1-sig)
 RUWE and duplicate source : 0.95 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL75
 Note                      : FP:true

 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
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