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2016-11-03 / TYC 0867-00930-1 / (423) Diotima

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Tomas Janik O+ VID M432 CZ GPS++ 05:26:07 05:26:13.47 05:28:10 0.08
2 show Henk De Groot O+ VID M356 NL GPS++ 05:22:03 05:25:57.55 05:26:04.25 05:28:18 0.01 0.01 6.70 246.6
3 show Jan-Maarten Winkel O+ VID M310 NL GPS++ 05:25:03 05:25:58.28 05:26:04.95 05:27:03 0.17 0.17 6.67 245.5
4 show Wolfgang Rothe O+ VID M200 DE GPS++ 05:25:50 05:26:10.24 05:26:12.36 05:27:01 0.08 0.08 2.12 78.0
5 show Michal Rottenborn O- VID M203 CZ 05:24:11 05:28:11
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#137 : 1fc9ea03-81b9-4e7e-81fd-aec153260f70 [db: observed]

Using prediction 1fc9ea03-81b9-4e7e-81fd-aec153260f70 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 = 254 x 212 km
a',b' = 126.9, 106.0 km
X0,Y0 = -1066.6, 16.7 km
Mean diameter = 232 km

From 3 chords (VID)








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: 2016-11-03, 05:25 UT (JD = 2457695.726)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 2173.04.775 351°, 4° 2.444826e612869.70.0° None2017-04-03 194.0 +/- 18.0 km 2007-02-27
# 1836None4.775 354°, 0° 2.444826e612869.70.0° None2017-07-11 209.0 +/- 7.0 km 2017-07-11
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] : 1fc9ea03-81b9-4e7e-81fd-aec153260f70 [observed]

 Occultation Date + Time   : 2016-11-03 at 05:27:56 UT +/- 0.0 min  [1]
 Object Designation        : (423) Diotima
 Orbit Class               : MBA
 Star Designation          : GDR3 3919275447079135232
 Star Coordinates (ICRF)   : RA = 11 53 37.3397, DE = +10 59 13.960  [2]
 Star Magnitudes           : G = 9.63 mag, RP = 9.05 mag, BP = 10.03 mag
 Object Magnitude          : V = 13.5 mag
 Estimated Magnitude Drop  : 3.9 mag
 Estimated Max. Duration   : 5.7 sec
 Object Mean Diameter      : 209 km  (src: astorb)
 Speed of the shadow       : 36.8 km/s
 Elongation to Moon & Sun  : 84° (sunlit = 11%), Sun = 48°
 Cross-track uncertainty   : 1.0 mas = 2 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.03 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#137

 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)

Aladin Sky Atlas
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