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2018-04-17 / 4UC 567-040073 / (73) Klytia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Oliver Kloes O+ VID M254 DE GPS++ 22:37:12 22:38:12.41 22:38:14.97 22:39:34 0.64 0.64 2.56 48.4
2 show Henk De Groot O+ VID M356 NL GPS++ 22:34:04 22:38:01.94 22:38:04.95 22:42:03 0.17 0.17 3.01 56.9
3 show Jan-Maarten Winkel O+ VID M310 NL GPS++ 22:37:02 22:38:02.90 22:38:04.00 22:39:02 0.33 0.33 1.10 20.8
4 show Jiri Polak O- VID M303 CZ 22:36:15 22:40:18
5 show Michal Rottenborn O- VID M303 CZ 22:36:16 22:40:16
6 show Olivier Schreurs O- VID M406 BE 22:37:00 22:39:37
7 show Esdert Edens O- VID M250 NL 22:34:57 22:40:56
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

7 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#65 : 53268f1b-7a19-4b21-91b3-b0785ae55947 [db: observed]

Using prediction 53268f1b-7a19-4b21-91b3-b0785ae55947 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 = 58 x 31 km
a',b' = 29.2, 15.7 km
X0,Y0 = -1178.9, 28.4 km
Mean diameter = 43 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: 2018-04-17, 22:37 UT (JD = 2458226.442)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 142None8.283 44°, 83° 2.445831e612395.40.0° None2011-10-11 not scaled 2011-04-20
# 143None8.283 266°, 68° 2.445831e612395.40.0° None2011-10-11 not scaled 2011-04-20
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] : 53268f1b-7a19-4b21-91b3-b0785ae55947 [observed]

 Occultation Date + Time   : 2018-04-17 at 22:35:40 UT +/- 0.01 min  [1]
 Object Designation        : (73) Klytia
 Orbit Class               : MBA
 Star Designation          : GDR3 0867118231654133504
 Star Coordinates (ICRF)   : RA = 07 43 51.2364, DE = +23 15 38.227  [2]
 Star Magnitudes           : G = 12.84 mag, RP = 12.01 mag, BP = 13.59 mag
 Object Magnitude          : V = 14.27 mag
 Estimated Magnitude Drop  : 1.7 mag
 Estimated Max. Duration   : 2.4 sec
 Object Mean Diameter      : 44 km  (src: astorb)
 Speed of the shadow       : 18.9 km/s
 Elongation to Moon & Sun  : 62° (sunlit = 4%), Sun = 86°
 Cross-track uncertainty   : 1.3 mas = 2 km = 0.05 path-width (1-sig)
 RUWE and duplicate source : 1.06 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#65

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

More Data and Informations
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