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2021-04-04 / 4UC 487-053655 / (3036) Krat

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Peter Nosal O+ CCD M250 SK NTP+ 03:02:38 03:05:01.26 03:05:03.92 03:06:46 0.17 0.17 2.66 44.2
2 show Roland Boninsegna O+ VID M305 BE GPS++ 03:04:22 03:05:37.08 03:05:39.96 03:06:06 0.08 0.08 2.88 47.8
3 show Jiri Polak O- CCD M303 CZ 03:04:32 03:07:18
4 show Michal Rottenborn O- CCD M254 CZ 03:03:17 03:07:17
5 show Jiri Kubanek O- CCD M203 CZ 03:03:18 03:07:17
6 show Karel Halir O- VID M507 CZ 03:03:16 03:07:16
7 show Oliver Kloes O- CCD M254 DE 03:04:30 03:06:30
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

7 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#60 : 7e07d1bc-9450-4946-943e-08afe4a15447 [db: observed]

Using prediction 7e07d1bc-9450-4946-943e-08afe4a15447 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 = -104.7, 18.3 km
Circular diameter = 50 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: 2021-04-04, 03:05 UT (JD = 2459308.628)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 50851.08.541 189°, -41° 2.457417e61891.60.0° 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] : 7e07d1bc-9450-4946-943e-08afe4a15447 [observed]

 Occultation Date + Time   : 2021-04-04 at 03:08:57 UT +/- 0.01 min  [1]
 Object Designation        : (3036) Krat
 Orbit Class               : MBA
 Star Designation          : GDR3 3900908208416025856
 Star Coordinates (ICRF)   : RA = 12 29 58.8560, DE = +07 16 07.867  [2]
 Star Magnitudes           : G = 12.84 mag, RP = 12.37 mag, BP = 13.15 mag
 Object Magnitude          : V = 15.64 mag
 Estimated Magnitude Drop  : 2.9 mag
 Estimated Max. Duration   : 2.6 sec
 Object Mean Diameter      : 42 km  (src: astorb)
 Speed of the shadow       : 16.6 km/s
 Elongation to Moon & Sun  : 97° (sunlit = 53%), Sun = 166°
 Cross-track uncertainty   : 7.0 mas = 12 km = 0.30 path-width (1-sig)
 RUWE and duplicate source : 0.9 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#60

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

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