Collaborative Occultation Resources and Archive (CORA)

Occultations | Observations | Reports | Info + Credits | JOA | Admin | Login

2020-06-11 / 4UC 482-092962 / (185) Eunike

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Jiri Kubanek O+ VID M203 CZ GPS++ 20:45:04 20:47:02.49 20:47:18.61 20:49:07 0.40 0.36 16.12 133.8
2 show R. Kresken/M. Busch O+ VID M200 DE GPS++ 20:46:02 20:47:18.16 20:47:38.16 20:48:10 0.80 0.32 20.00 166.0
3 show Jiri Polak O+ VID M303 CZ GPS++ 20:45:05 20:47:01.50 20:47:20.18 20:49:06 0.22 0.10 18.68 155.0
4 show Michal Rottenborn O+ VID M303 CZ GPS++ 20:45:06 20:47:01.26 20:47:20.20 20:49:06 0.15 0.13 18.94 157.2
5 show Karel Halir O+ VID M507 CZ GPS++ 20:45:05 20:46:59.75 20:47:18.96 20:49:05 0.05 0.04 19.21 159.4
6 show Jan Manek O+ CCD M205 CZ GPS++ 20:44:58 20:46:53.40 20:47:13.61 20:48:58 0.10 0.10 20.21 167.7
7 show Oliver Kloes O+ CCD M254 DE GPS++ 20:46:16 20:47:14.29 20:47:34.00 20:48:16 0.15 0.25 19.71 163.6
8 show O. Schreurs et al O+ VID M406 BE GPS++ 20:47:03 20:47:24.54 20:47:37.26 20:48:31 0.24 0.16 12.72 105.6
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

8 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#111 : d512203f-f3e0-4eee-8b7c-7607e02a8717 [db: observed]

Using prediction d512203f-f3e0-4eee-8b7c-7607e02a8717 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 = 177 x 168 km
a',b' = 88.6, 83.9 km
X0,Y0 = -330.2, 14.4 km
Mean diameter = 172 km

From 8 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.

Map with groundtrack and observer stations

Event Details 
 Occultation UUID [and DB] : d512203f-f3e0-4eee-8b7c-7607e02a8717 [observed]

 Occultation Date + Time   : 2020-06-11 at 20:39:07 UT +/- 0.02 min  [1]
 Object Designation        : (185) Eunike
 Orbit Class               : MBA
 Star Designation          : GDR3 4294026393272041472
 Star Coordinates (ICRF)   : RA = 19 15 31.1834, DE = +06 13 57.545  [2]
 Star Magnitudes           : G = 12.55 mag, RP = 11.83 mag, BP = 13.12 mag
 Object Magnitude          : V = 12.08 mag
 Estimated Magnitude Drop  : 0.5 mag
 Estimated Max. Duration   : 19.0 sec
 Object Mean Diameter      : 158 km  (src: astorb)
 Speed of the shadow       : 8.3 km/s
 Elongation to Moon & Sun  : 54° (sunlit = 63%), Sun = 140°
 Cross-track uncertainty   : 1.7 mas = 2 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.97 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#111

 
 [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
Aladin Lite direct link (has Gaia overlay)