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2018-10-04 / TYC 0754-01369-1 / (2111) Tselina

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Stefano Sposetti O+ VID M280 CH GPS++ 02:29:33 02:30:24.11 02:30:25.59 02:31:05 0.04 0.04 1.48 24.6
2 show Pierre Le Cam O+ CCD M500 FR GPS++ 02:23:02 02:29:57.72 02:29:59.32 02:35:02 0.04 0.04 1.60 26.6
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

2 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#61 : e424881f-1f71-45ea-bd0a-00120dada90f [db: observed]

Using prediction e424881f-1f71-45ea-bd0a-00120dada90f 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 = -888.3, 20.3 km
Circular diameter = 27 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: 2018-10-04, 02:30 UT (JD = 2458395.604)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 35111.06.563 288°, 32° 2.451229e67166.60.0° 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] : e424881f-1f71-45ea-bd0a-00120dada90f [observed]

 Occultation Date + Time   : 2018-10-04 at 02:34:24 UT +/- 0.01 min  [1]
 Object Designation        : (2111) Tselina
 Orbit Class               : MBA
 Star Designation          : GDR3 3351926343340233216
 Star Coordinates (ICRF)   : RA = 06 39 50.6116, DE = +11 47 16.681  [2]
 Star Magnitudes           : G = 11.49 mag, RP = 11.19 mag, BP = 11.67 mag
 Object Magnitude          : V = 15.95 mag
 Estimated Magnitude Drop  : 4.5 mag
 Estimated Max. Duration   : 1.8 sec
 Object Mean Diameter      : 30 km  (src: astorb)
 Speed of the shadow       : 16.6 km/s
 Elongation to Moon & Sun  : 26° (sunlit = 31%), Sun = 91°
 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#61

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

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