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2020-05-17 / 4UC 401-052016 / (95) Arethusa

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Stefan Meister O+ CCD M360 CH GPS++ 20:28:57 20:29:54.08 20:30:08.89 20:30:09 0.83 0.17 14.81 100.7
2 show Andreas Schweizer O+ CCD M500 CH GPS++ 20:28:12 20:29:54.06 20:30:08.71 20:31:38 0.10 0.35 14.65 99.6
3 show Gregor Krannich O- CCD M350 DE 20:28:01 20:31:51
4 show Bjoern Kattentidt O- VID M279 DE 20:28:08 20:32:31
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

4 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#63 : 6d936cde-ab38-4e99-a320-333b8c78a30d [db: observed]

Using prediction 6d936cde-ab38-4e99-a320-333b8c78a30d 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:
Circular profile fit was not successful ...








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.

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Sky projection (artificial light) for occ. time: 2020-05-17, 20:29 UT (JD = 2458987.345)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 294None8.702 149°, 33° 2.444085e614902.40.0° None2011-04-11 147.0 +/- 32.0 km 2011-02-16
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] : 6d936cde-ab38-4e99-a320-333b8c78a30d [observed]

 Occultation Date + Time   : 2020-05-17 at 20:16:34 UT +/- 0.05 min  [1]
 Object Designation        : (95) Arethusa
 Star Designation          : GDR3 3589906735998986624
 Star Coordinates (ICRF)   : RA = 11 26 56.2932, DE = -09 58 32.709  [2]
 Star Magnitudes           : G = 14.6 mag, RP = 14.06 mag, BP = 14.97 mag
 Object Magnitude          : V = 13.84 mag
 Estimated Magnitude Drop  : 0.4 mag
 Estimated Max. Duration   : 20.1 sec
 Object Mean Diameter      : 136 km  (src: astorb)
 Speed of the shadow       : 6.8 km/s
 Elongation to Moon & Sun  : 161° (sunlit = 21%), Sun = 118°
 Cross-track uncertainty   : 1.7 mas = 3 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 0.94 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#63

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

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