Collaborative Occultation Resources and Archive (CORA)

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

2024-07-15 / UCAC4 319-217770 / (866) Fatme

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Ferran Casarramona O+ VID M200 ES GPS 23:21:02 23:22:25.4 23:22:29.9 23:24:00 0.8 1.1 4.50 55.8
2 show Jiri Kubanek O+ VID M303 CZ GPS 23:19:07 23:20:33.6 23:20:38.3 23:22:06 0.5 0.9 4.70 58.3
3 show Anna Marciniak, Jagoda Chmiel, +1 O+ CCD M400 PL GPS 23:18:19 23:20:15.800 23:20:21.800 23:20:41 1.0 1.0 6.00 74.4
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

3 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#91 : c779a170-c34d-11ef-5276-efc4edabffb3 [db: observed]
JPL#89 : 148f3780-865f-11ef-78cd-6cc377af6659 [db: asteroids]

Using prediction c779a170-c34d-11ef-5276-efc4edabffb3 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 = 84 x 77 km
a',b' = 42.0, 38.6 km
X0,Y0 = 1932.5, 15.5 km
Mean diameter = 81 km

From 3 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] : c779a170-c34d-11ef-5276-efc4edabffb3 [observed]

 Occultation Date + Time   : 2024-07-15 at 23:23:49 UT +/- 0.0 min  [1]
 Object Designation        : (866) Fatme
 Orbit Class               : MBA
 Star Designation          : GDR3 6765515192849201408
 Star Coordinates (ICRF)   : RA = 19 35 00.4384, DE = -26 23 30.850  [2]
 Star Magnitudes           : G = 14.43 mag, RP = 13.73 mag, BP = 14.98 mag
 Object Magnitude          : V = 13.88 mag
 Estimated Magnitude Drop  : 0.5 mag
 Estimated Max. Duration   : 7.1 sec
 Object Mean Diameter      : 88 km  (src: astorb)
 Speed of the shadow       : 12.4 km/s
 Elongation to Moon & Sun  : 65° (sunlit = 69%), Sun = 175°
 Cross-track uncertainty   : 0.4 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.05 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#91

 
 [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)