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2019-09-11 / TYC 6816-00286-1 / (91) Aegina

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show A. Berdejo/L. Sanz O+ VID M180 ES GPS++ 20:36:01 20:37:50.62 20:37:56.70 20:38:09 0.64 0.32 6.08 93.0
2 show Denis Marchais O+ CCD M406 FR NTP 20:37:24 20:37:55.02 20:38:02.66 20:39:24 0.03 0.03 7.64 116.9
3 show P. Andre et al O+ VID M300 FR GPS++ 20:29:58 20:37:55.76 20:38:03.28 20:43:04 0.08 0.08 7.52 115.1
4 show Jean-Marc Lechopier O+ CCD L120 FR NTP 20:29:34 20:37:58.45 20:38:05.96 20:42:22 0.05 0.07 7.51 114.9
5 show E. Frappa et al O+ VID M203 FR GPS++ 20:36:31 20:37:55.20 20:37:57.94 20:39:30 0.09 0.06 2.74 41.9
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

5 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#146 : 0a00827d-f626-42bf-bb20-bf4ccfe24bdb [db: observed]

Using prediction 0a00827d-f626-42bf-bb20-bf4ccfe24bdb 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:
Size = 125 x 91 km
a',b' = 62.6, 45.4 km
X0,Y0 = -95.0, 9.8 km
Mean diameter = 107 km

From 5 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: 2019-09-11, 20:37 UT (JD = 2458738.359)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 58311.06.028 40°, 32° 2.457228e61510.40.0° None2020-10-05 not scaled 2019-10-23
# 58321.06.028 218°, 36° 2.457228e61510.40.0° 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] : 0a00827d-f626-42bf-bb20-bf4ccfe24bdb [observed]

 Occultation Date + Time   : 2019-09-11 at 20:34:38 UT +/- 0.01 min  [1]
 Object Designation        : (91) Aegina
 Orbit Class               : MBA
 Star Designation          : GDR3 4109475909186807296
 Star Coordinates (ICRF)   : RA = 17 14 45.5264, DE = -25 18 18.543  [2]
 Star Magnitudes           : G = 10.3 mag, RP = 9.73 mag, BP = 10.68 mag
 Object Magnitude          : V = 14.57 mag
 Estimated Magnitude Drop  : 4.3 mag
 Estimated Max. Duration   : 7.2 sec
 Object Mean Diameter      : 110 km  (src: astorb)
 Speed of the shadow       : 15.3 km/s
 Elongation to Moon & Sun  : 64° (sunlit = 95%), Sun = 91°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 0.73 mas, dup.src = 1  (0:false, 1:true)

 Ephemeris Reference       : JPL#146

 Object is a Gaia mass determination target !
[1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

More Data and Informations
SiMDA | 3D Asteroid Catalogue | Johnston Archive | Star at CDS (Vizier) | JPL Small-Body Node | Minor Planet Center | Wikipedia
(If error 404: link not valid which means no data available)

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