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2018-02-21 / TYC 2398-00366-1 / (1113) Katja

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Vaclav Priban O+ VID M300 CZ RAD 21:51:07 21:54:19.85 21:54:23.85 21:56:20 4.00 46.4
2 show Michal Rottenborn O+ VID M303 CZ GPS++ 21:52:26 21:54:16.83 21:54:18.75 21:56:26 0.02 0.02 1.92 22.3
3 show Jiri Kubanek O+ VID M203 CZ GPS++ 21:52:22 21:54:15.55 21:54:18.71 21:56:41 0.08 0.12 3.16 36.7
4 show Tomas Janik O+ VID M254 CZ GPS++ 21:52:37 21:54:14.29 21:54:17.17 21:54:37 0.16 0.16 2.88 33.4
5 show Zdenek Moravec O+ VID L120 CZ GPS++ 21:52:59 21:54:13.45 21:54:17.36 21:55:31 0.04 0.05 3.91 45.4
6 show Bjoern Kattentidt O- VID M279 DE 21:52:31 21:56:33
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

6 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#57 : 765cc27d-5bd2-413f-848b-44e9649ff7b7 [db: observed]

Using prediction 765cc27d-5bd2-413f-848b-44e9649ff7b7 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:
Ellipse profile fit was not successful. Trying circular fit.

Circular diameter = 45 km

From 5 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: 2018-02-21, 21:53 UT (JD = 2458171.412)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 44481.018.420 354°, -49° 2.457317e6854.40.0° None2020-10-05 not scaled 2019-10-23
# 44491.018.419 137°, -51° 2.457317e6854.40.0° None2020-10-05 not scaled 2019-10-23
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] : 765cc27d-5bd2-413f-848b-44e9649ff7b7 [observed]

 Occultation Date + Time   : 2018-02-21 at 21:52:41 UT +/- 0.02 min  [1]
 Object Designation        : (1113) Katja
 Orbit Class               : MBA
 Star Designation          : GDR3 0181973194488036864
 Star Coordinates (ICRF)   : RA = 05 15 08.8809, DE = +34 10 53.899  [2]
 Star Magnitudes           : G = 10.45 mag, RP = 9.51 mag, BP = 11.36 mag
 Object Magnitude          : V = 14.2 mag
 Estimated Magnitude Drop  : 3.8 mag
 Estimated Max. Duration   : 3.3 sec
 Object Mean Diameter      : 39 km  (src: astorb)
 Speed of the shadow       : 11.6 km/s
 Elongation to Moon & Sun  : 39° (sunlit = 34%), Sun = 107°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 1.26 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#57

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

More Data and Informations
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