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2021-03-29 / 4UC 569-036582 / (828) Lindemannia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Paolo Fini O+ CCD M305 IT GPS++ 18:54:32 18:54:55.79 18:55:00.64 18:55:23 0.18 0.25 4.85 58.2
2 show Luca Grazzini O+ CCD M200 IT NTP 18:54:14 18:54:54.90 18:54:59.75 18:55:55 0.75 0.50 4.85 58.2
3 show Pietro Baruffetti O+ VID M300 IT GPS++ 18:53:28 18:54:46.69 18:54:51.97 18:56:28 0.16 0.16 5.28 63.4
4 show Paolo Bacci O+ CCD M600 IT GPS 18:54:12 18:54:53.5 18:54:56.6 18:55:26 1.0 1.0 3.10 37.2
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#116 : 58f91b7d-02b0-4756-b0db-981ea1f74ca2 [db: observed]

Using prediction 58f91b7d-02b0-4756-b0db-981ea1f74ca2 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:
Size = 83 x 29 km
a',b' = 41.3, 14.4 km
X0,Y0 = -404.3, 29.0 km
Mean diameter = 49 km

From 4 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).
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Map with groundtrack and observer stations

Event Details 
 Occultation UUID [and DB] : 58f91b7d-02b0-4756-b0db-981ea1f74ca2 [observed]

 Occultation Date + Time   : 2021-03-29 at 18:53:42 UT +/- 0.02 min  [1]
 Object Designation        : (828) Lindemannia
 Orbit Class               : MBA
 Star Designation          : GDR3 3368538319065094656
 Star Coordinates (ICRF)   : RA = 07 04 16.2571, DE = +23 40 25.859  [2]
 Star Magnitudes           : G = 13.81 mag, RP = 13.14 mag, BP = 14.34 mag
 Object Magnitude          : V = 16.29 mag
 Estimated Magnitude Drop  : 2.6 mag
 Estimated Max. Duration   : 4.5 sec
 Object Mean Diameter      : 53 km  (src: astorb)
 Speed of the shadow       : 12.0 km/s
 Elongation to Moon & Sun  : 99° (sunlit = 99%), Sun = 95°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 0.96 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#116

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

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