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2021-08-13 / TYC 5732-00350-1 / (1094) Siberia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Emmanuel Brochard O+ VID M203 FR GPS++ 23:39:24 23:46:22.43 23:46:23.63 23:49:25 0.08 0.08 1.20 13.9
2 show Pierre Le Cam O+ CCD M250 FR GPS++ 23:44:00 23:46:15.16 23:46:16.44 23:48:00 0.03 0.03 1.28 14.8
3 show Jean-Louis Dumont O- CCD M280 FR 23:44:01 23:48:01
4 show Roland Boninsegna O- CCD V112 BE 23:44:04 23:48:02
5 show Jean Bourgeois O- VID M200 BE 23:45:00 23:46:30
6 show O. Schreurs et al O- VID M406 BE 23:44:48 23:46:57
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#60 : 9f7eb181-185b-4253-bace-ebbd6c880533 [db: observed]

Using prediction 9f7eb181-185b-4253-bace-ebbd6c880533 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 = 1896.4, 22.5 km
Circular diameter = 15 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: 2021-08-13, 23:45 UT (JD = 2459440.490)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 33691.021.150 14°, 35° 2.451121e68319.50.0° None2019-09-26 not scaled 2019-05-07
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] : 9f7eb181-185b-4253-bace-ebbd6c880533 [observed]

 Occultation Date + Time   : 2021-08-13 at 23:52:55 UT +/- 0.01 min  [1]
 Object Designation        : (1094) Siberia
 Orbit Class               : MBA
 Star Designation          : GDR3 4183834025085239552
 Star Coordinates (ICRF)   : RA = 19 40 43.3014, DE = -12 14 55.045  [2]
 Star Magnitudes           : G = 10.98 mag, RP = 10.36 mag, BP = 11.43 mag
 Object Magnitude          : V = 15.99 mag
 Estimated Magnitude Drop  : 5.0 mag
 Estimated Max. Duration   : 1.6 sec
 Object Mean Diameter      : 18 km  (src: astorb)
 Speed of the shadow       : 11.6 km/s
 Elongation to Moon & Sun  : 85° (sunlit = 32%), Sun = 152°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 0.87 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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