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2018-04-11 / 2UC 30371074 / (371) Bohemia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Vaclav Priban O+ VID M300 CZ RAD 19:14:23 19:16:48.13 19:16:54.72 19:18:32 6.59 47.4
2 show Zdenek Moravec O+ VID L120 CZ GPS++ 19:15:09 19:16:56.07 19:16:58.07 19:18:49 0.16 0.08 2.00 14.4
3 show Karel Halir O- VID M507 CZ 19:14:30
4 show Peter Lindner O- VID M305 DE 19:13:18 19:18:31
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#63 : 0510c758-4784-43d4-ad18-aeb040e784d5 [db: observed]

Using prediction 0510c758-4784-43d4-ad18-aeb040e784d5 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 = -2016.1, 15.9 km
Circular diameter = 51 km

From 2 chords (VID)








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: 2018-04-11, 19:15 UT (JD = 2458220.302)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 667None10.740 93°, 49° 2.44928e68940.30.0° NoneNone not scaled 2013-02-11
# 668None10.740 256°, 43° 2.44928e68940.30.0° NoneNone not scaled 2013-02-11
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] : 0510c758-4784-43d4-ad18-aeb040e784d5 [observed]

 Occultation Date + Time   : 2018-04-11 at 19:07:11 UT +/- 0.02 min  [1]
 Object Designation        : (371) Bohemia
 Orbit Class               : MBA
 Star Designation          : GDR3 3801135534014503296
 Star Coordinates (ICRF)   : RA = 10 51 20.1980, DE = -04 07 11.181  [2]
 Star Magnitudes           : G = 12.26 mag, RP = 11.62 mag, BP = 12.73 mag
 Object Magnitude          : V = 13.02 mag
 Estimated Magnitude Drop  : 1.2 mag
 Estimated Max. Duration   : 7.6 sec
 Object Mean Diameter      : 55 km  (src: astorb)
 Speed of the shadow       : 7.2 km/s
 Elongation to Moon & Sun  : 160° (sunlit = 19%), Sun = 143°
 Cross-track uncertainty   : 2.3 mas = 3 km = 0.06 path-width (1-sig)
 RUWE and duplicate source : 1.02 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#63

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

More Data and Informations
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