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2021-04-22 / 4UC 486-054665 / (3036) Krat

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Pierre Le Cam O+ CCD M250 FR GPS++ 21:07:00 21:09:04.49 21:09:07.49 21:11:00 0.30 0.30 3.00 41.1
2 show Michal Rottenborn O+ CCD M254 CZ GPS++ 21:05:56 21:07:56.10 21:07:57.70 21:09:56 0.20 0.20 1.60 21.9
3 show Bjoern Kattentidt O- VID M279 DE 21:05:54 21:10:05
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

3 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#60 : 78c7b7fa-e386-40ae-9def-14e0f5e5bb5d [db: observed]

Using prediction 78c7b7fa-e386-40ae-9def-14e0f5e5bb5d 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 = 683.9, 7.4 km
Circular diameter = 53 km

From 2 chords (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: 2021-04-22, 21:08 UT (JD = 2459327.381)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 50851.08.541 189°, -41° 2.457417e61910.40.0° 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] : 78c7b7fa-e386-40ae-9def-14e0f5e5bb5d [observed]

 Occultation Date + Time   : 2021-04-22 at 21:08:35 UT +/- 0.02 min  [1]
 Object Designation        : (3036) Krat
 Orbit Class               : MBA
 Star Designation          : GDR3 3901565785089144064
 Star Coordinates (ICRF)   : RA = 12 14 57.4229, DE = +07 03 06.095  [2]
 Star Magnitudes           : G = 14.36 mag, RP = 13.73 mag, BP = 14.84 mag
 Object Magnitude          : V = 15.94 mag
 Estimated Magnitude Drop  : 1.8 mag
 Estimated Max. Duration   : 3.1 sec
 Object Mean Diameter      : 42 km  (src: astorb)
 Speed of the shadow       : 13.7 km/s
 Elongation to Moon & Sun  : 26° (sunlit = 76%), Sun = 147°
 Cross-track uncertainty   : 6.7 mas = 12 km = 0.30 path-width (1-sig)
 RUWE and duplicate source : 0.99 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

More Data and Informations
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