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2021-03-24 / 4UC 499-038086 / (1070) Tunica

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Stefano Sposetti O+ CCD M420 CH GPS++ 19:04:10 19:07:10.91 19:07:13.99 19:10:10 0.30 0.23 3.08 37.6
2 show Jiri Kubanek O+ CCD M203 CZ GPS++ 19:05:43 19:07:44.37 19:07:48.37 19:09:47 1.20 1.20 4.00 48.8
3 show Werner Hasubick O- CCD M440 DE 19:05:00 19:10:00
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

3 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#61 : bc59b0dd-88d5-461c-b105-121226bfbb0b [db: observed]

Using prediction bc59b0dd-88d5-461c-b105-121226bfbb0b 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 = 1457.2, -13.4 km
Circular diameter = 90 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: 2021-03-24, 19:07 UT (JD = 2459298.297)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 44271.015.576 132°, -90° 2.457343e61955.30.0° 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] : bc59b0dd-88d5-461c-b105-121226bfbb0b [observed]

 Occultation Date + Time   : 2021-03-24 at 19:02:54 UT +/- 0.03 min  [1]
 Object Designation        : (1070) Tunica
 Orbit Class               : MBA
 Star Designation          : GDR3 3157787469306985216
 Star Coordinates (ICRF)   : RA = 07 05 33.6580, DE = +09 41 29.611  [2]
 Star Magnitudes           : G = 14.41 mag, RP = 13.72 mag, BP = 14.96 mag
 Object Magnitude          : V = 16.86 mag
 Estimated Magnitude Drop  : 2.6 mag
 Estimated Max. Duration   : 3.0 sec
 Object Mean Diameter      : 36 km  (src: astorb)
 Speed of the shadow       : 12.2 km/s
 Elongation to Moon & Sun  : 30° (sunlit = 80%), Sun = 102°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.04 path-width (1-sig)
 RUWE and duplicate source : 1.03 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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