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2022-03-26 / 4UC 567-023389 / (487) Venetia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Manfred Simon O+ CCD M203 DE NTP+ 18:29:41 18:30:29.56 18:30:32.81 18:31:41 0.30 0.30 3.25 62.7
2 show Werner Hasubick O+ CCD M440 DE GPS++ 18:28:00 18:30:29.85 18:30:33.16 18:31:00 0.10 0.04 3.31 63.9
3 show Gregor Krannich O+ CCD M350 DE GPS++ 18:29:31 18:30:30.52 18:30:33.28 18:31:50 0.03 0.03 2.76 53.3
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: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#113 : 1ca6512a-e9a2-450e-85d0-92b8cbde1654 [db: observed]

Using prediction 1ca6512a-e9a2-450e-85d0-92b8cbde1654 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 = 65 x 43 km
a',b' = 32.4, 21.3 km
X0,Y0 = 367.8, 31.0 km
Mean diameter = 53 km

From 3 chords (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).

Check SiMDA for size and mass data.

Check Johnston Archive for satellites.

Sky projection (artificial light) for occ. time: 2022-03-26, 18:30 UT (JD = 2459665.271)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 18713.013.341 78°, 3° 2.44583e613835.30.0° None2018-03-22 64.0 +/- 4.0 km 2018-03-22
# 18723.013.341 252°, 3° 2.44583e613835.30.0° None2018-03-22 61.0 +/- 4.0 km 2018-03-22
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] : 1ca6512a-e9a2-450e-85d0-92b8cbde1654 [observed]

 Occultation Date + Time   : 2022-03-26 at 18:28:54 UT +/- 0.01 min  [1]
 Object Designation        : (487) Venetia
 Orbit Class               : MBA
 Star Designation          : GDR3 3425374716509511296
 Star Coordinates (ICRF)   : RA = 06 08 36.3022, DE = +23 21 33.604  [2]
 Star Magnitudes           : G = 12.65 mag, RP = 12.23 mag, BP = 12.91 mag
 Object Magnitude          : V = 13.59 mag
 Estimated Magnitude Drop  : 1.3 mag
 Estimated Max. Duration   : 3.3 sec
 Object Mean Diameter      : 63 km  (src: astorb)
 Speed of the shadow       : 19.3 km/s
 Elongation to Moon & Sun  : 155° (sunlit = 33%), Sun = 86°
 Cross-track uncertainty   : 1.3 mas = 2 km = 0.04 path-width (1-sig)
 RUWE and duplicate source : 1.06 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#113

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

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