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2002-02-12 / TYC 1400-00518-1 / (1113) Katja

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Alex Roca O+ VIS M200 ES TTV 21:41:00 21:52:28.3 21:52:31.0 21:53:00 0.1 0.1 2.70 32.7
2 show Laurent Brunetto O+ CCD M254 FR RAD 21:40:00 21:51:49.7 21:51:51.4 22:00:00 1.70 20.6
3 show Rui Goncalves O- VIS M254 PT 21:50:00 22:00:00
4 show Carles Schnabel O- VIS M210 ES 21:45:00 22:05:00
5 show R. Casas et al O- CCD M500 ES
6 show Oscar Canales O- VIS M200 ES 21:45:49 21:58:15
7 show Jean Lecacheux O- CCD M1050 FR
8 show Patrick Martinez O- FR 21:51:30 21:53:30
9 show Raymond Poncy O- FR
10 show Philippe Dupouy O- CCD M318 FR
11 show Philippe Dupouy O- CCD FR
12 show Jean Montanne O- CCD M203 FR 21:50:00 21:54:00
13 show Jaroslav Grnja O- VIS M100 YU 21:38:30 21:55:30
14 show Regis Neel O- VIS M310 FR 21:00:00 22:10:00
15 show Simone Bolzoni O- VIS M200 IT 21:49:00 21:55:00
16 show Stefano Sposetti O- CCD M400 CH 22:44:09 22:58:50
17 show R. Behrend et al O- CCD CH 21:50:36 21:53:06
18 show Wilhelm Dziura O- VIS M203 PL 21:42:00 22:00:00
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

18 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#57 : a4695384-5326-4095-8c27-13cb101adef2 [db: observed]

Using prediction a4695384-5326-4095-8c27-13cb101adef2 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 = 324.3, 47.9 km
Circular diameter = 47 km

From 2 chords (VIS,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: 2002-02-12, 21:52 UT (JD = 2452318.411)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 44481.018.420 354°, -49° 2.457317e6-4998.60.0° None2020-10-05 not scaled 2019-10-23
# 44491.018.419 137°, -51° 2.457317e6-4998.60.0° 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] : a4695384-5326-4095-8c27-13cb101adef2 [observed]

 Occultation Date + Time   : 2002-02-12 at 21:50:24 UT +/- 0.05 min  [1]
 Object Designation        : (1113) Katja
 Orbit Class               : MBA
 Star Designation          : GDR3 0684676958748861568
 Star Coordinates (ICRF)   : RA = 08 59 15.9884, DE = +20 26 51.469  [2]
 Star Magnitudes           : G = 10.32 mag, RP = 9.86 mag, BP = 10.6 mag
 Object Magnitude          : V = 13.2 mag
 Estimated Magnitude Drop  : 3.0 mag
 Estimated Max. Duration   : 3.2 sec
 Object Mean Diameter      : 39 km  (src: astorb)
 Speed of the shadow       : 12.1 km/s
 Elongation to Moon & Sun  : 161° (sunlit = 0%), Sun = 167°
 Cross-track uncertainty   : 16.0 mas = 20 km = 0.54 path-width (1-sig)
 RUWE and duplicate source : 1.05 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

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