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2017-09-12 / TYC 1369-00895-1 / (19) Fortuna

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Henk De Groot O+ VID M356 NL GPS++ 03:46:09 03:48:08.87 03:48:13.78 03:49:46 0.02 0.02 4.91 171.8
2 show Peter Enskonatus O+ CCD M200 DE GPS 03:47:00 03:48:18.52 03:48:24.10 03:50:00 0.06 0.06 5.58 195.3
3 show Tomas Janik O- VID M153 CZ 03:46:12 03:50:27
4 show Zdenek Moravec O- VID L120 CZ 03:47:51 03:48:58
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#155 : 22e0319d-5241-4a09-832c-0e8688a2f90b [db: observed]

Using prediction 22e0319d-5241-4a09-832c-0e8688a2f90b 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 = -658.2, 19.0 km
Circular diameter = 194 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).

Check SiMDA for size and mass data.

Check Johnston Archive for satellites.

Sky projection (artificial light) for occ. time: 2017-09-12, 03:47 UT (JD = 2458008.658)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 117None7.443 98°, 57° 2.43884125586e619167.40.0° confirmed by HST and occultation timings, size from AO is 187+/-13 km2013-07-24 210.0 +/- 12.0 km 2009-04-15
# 18034.07.443 97°, 69° 2.43884125586e619167.40.0° None2017-06-19 212.0 +/- 4.0 km 2017-06-06
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] : 22e0319d-5241-4a09-832c-0e8688a2f90b [observed]

 Occultation Date + Time   : 2017-09-12 at 03:50:12 UT +/- 0.0 min  [1]
 Object Designation        : (19) Fortuna
 Orbit Class               : MBA
 Star Designation          : GDR3 0672772168397538944
 Star Coordinates (ICRF)   : RA = 07 43 58.2817, DE = +20 06 46.255  [2]
 Star Magnitudes           : G = 10.17 mag, RP = 9.77 mag, BP = 10.41 mag
 Object Magnitude          : V = 12.43 mag
 Estimated Magnitude Drop  : 2.4 mag
 Estimated Max. Duration   : 3.1 sec
 Object Mean Diameter      : 109 km  (src: astorb)
 Speed of the shadow       : 35.0 km/s
 Elongation to Moon & Sun  : 49° (sunlit = 63%), Sun = 55°
 Cross-track uncertainty   : 1.3 mas = 2 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 3.09 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#155

 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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