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2021-06-07 / 4UC 473-000117 / (141) Lumen

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Jordi Marco O+ CCD M235 ES NTP 02:49:00 02:51:00.68 02:51:04.41 02:53:02 0.20 0.20 3.73 109.7
2 show Carles Schnabel O+ VID M400 ES GPS++ 02:50:00 02:51:00.60 02:51:04.80 02:51:57 0.04 0.04 4.20 123.5
3 show Yves Argentin O- VID M305 FR 02:50:24 02:51:54
4 show Eric Frappa O- VID M203 FR 02:49:46 02:52:44
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

4 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#93 : 5c067f87-8709-46d3-b913-cc8bee2aac67 [db: observed]

Using prediction 5c067f87-8709-46d3-b913-cc8bee2aac67 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:
X0,Y0 = 3195.2, 39.8 km
Circular diameter = 140 km

From 2 chords (VID,CCD)








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).

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Map with groundtrack and observer stations

Event Details 
 Occultation UUID [and DB] : 5c067f87-8709-46d3-b913-cc8bee2aac67 [observed]

 Occultation Date + Time   : 2021-06-07 at 02:51:43 UT +/- 0.01 min  [1]
 Object Designation        : (141) Lumen
 Orbit Class               : MBA
 Star Designation          : GDR3 2741691449985045632
 Star Coordinates (ICRF)   : RA = 00 04 49.1154, DE = +04 26 51.519  [2]
 Star Magnitudes           : G = 12.39 mag, RP = 11.9 mag, BP = 12.71 mag
 Object Magnitude          : V = 13.09 mag
 Estimated Magnitude Drop  : 1.2 mag
 Estimated Max. Duration   : 4.5 sec
 Object Mean Diameter      : 131 km  (src: astorb)
 Speed of the shadow       : 29.4 km/s
 Elongation to Moon & Sun  : 38° (sunlit = 10%), Sun = 74°
 Cross-track uncertainty   : 6.3 mas = 10 km = 0.08 path-width (1-sig)
 RUWE and duplicate source : 1.08 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#93

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

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