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2016-04-11 / TYC 1994-00082-1 / (164) Eva

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Florian Signoret O+ VID M200 FR GPS++ 21:02:29 21:16:46.17 21:16:49.61 21:17:26 0.02 0.02 3.44 57.8
2 show G. Aufranc et al O+ VID M410 FR GPS++ 21:13:00 21:16:46.18 21:16:49.63 21:17:05 0.02 0.02 3.45 58.0
3 show Matthieu Conjat O+ CCD M400 FR NTP 21:15:15 21:16:44.98 21:16:47.28 21:18:16 1 1 2.30 38.6
4 show E. Frappa/A. Klotz O+ CCD M250 FR GPS++ 21:16:04 21:16:47.84 21:16:49.13 21:19:20 0.08 0.08 1.29 21.7
5 show Pietro Baruffetti O+ VID M200 IT GPS++ 21:14:52 21:16:34.12 21:16:35.62 21:17:52 0.17 0.17 1.50 25.2
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#101 : 81c8264e-42cf-49ce-aa36-46db844f6597 [db: observed]

Using prediction 81c8264e-42cf-49ce-aa36-46db844f6597 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 = 1876 x 29 km
a',b' = 937.8, 14.5 km
X0,Y0 = -942.6, -20.3 km
Mean diameter = 233 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: 2016-04-11, 21:15 UT (JD = 2457490.385)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 1021None13.664 54°, -10° 2.442713e614777.40.0° NoneNone not scaled 2016-01-04
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] : 81c8264e-42cf-49ce-aa36-46db844f6597 [observed]

 Occultation Date + Time   : 2016-04-11 at 21:14:20 UT +/- 0.0 min  [1]
 Object Designation        : (164) Eva
 Orbit Class               : MBA
 Star Designation          : GDR3 1459430784829858432
 Star Coordinates (ICRF)   : RA = 13 09 43.6116, DE = +26 10 15.930  [2]
 Star Magnitudes           : G = 10.83 mag, RP = 10.23 mag, BP = 11.27 mag
 Object Magnitude          : V = 14.34 mag
 Estimated Magnitude Drop  : 3.6 mag
 Estimated Max. Duration   : 6.2 sec
 Object Mean Diameter      : 105 km  (src: astorb)
 Speed of the shadow       : 16.8 km/s
 Elongation to Moon & Sun  : 102° (sunlit = 26%), Sun = 145°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.03 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#101

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

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