2019-11-18 / 4UC 550-012450 / (140) Siwa
# | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | show | Christophe Ratinaud | O+ | VID | M250 | FR | GPS++ | 21:41:00 | 21:52:07.89 | 21:52:15.63 | 21:43:26 | 0.02 | 0.06 | 7.74 | 99.1 |
2 | show | Peter Enskonatus | O+ | VID | M200 | DE | GPS++ | 21:49:08 | 21:50:46.01 | 21:50:53.42 | 21:52:00 | 0.35 | 0.22 | 7.41 | 94.8 |
3 | show | Christian Weber | O+ | VID | M150 | DE | GPS++ | 21:49:16 | 21:50:46.71 | 21:50:54.62 | 21:52:01 | 0.21 | 0.28 | 7.91 | 101.2 |
4 | show | Nikolai Wuensche | O+ | CCD | M300 | DE | GPS++ | 21:47:56 | 21:50:45.72 | 21:50:52.77 | 21:54:06 | 0.23 | 0.38 | 7.05 | 90.2 |
4 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):JPL#175 : b583862b-a101-429f-8e08-d6d272a6425d [db: observed] |
Using prediction b583862b-a101-429f-8e08-d6d272a6425d for map and profile fit
Ellipse and circular profile fits to the timings (chords) |
---|
|
Auto-Fit Result: Size = 110 x 64 km a',b' = 55.0, 32.0 km X0,Y0 = 229.8, 32.5 km Mean diameter = 84 km From 4 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] : b583862b-a101-429f-8e08-d6d272a6425d [observed] Occultation Date + Time : 2019-11-18 at 21:48:08 UT +/- 0.01 min [1] Object Designation : (140) Siwa Orbit Class : MBA Star Designation : GDR3 3408370670400685696 Star Coordinates (ICRF) : RA = 05 00 02.4803, DE = +19 50 42.245 [2] Star Magnitudes : G = 12.86 mag, RP = 12.03 mag, BP = 13.59 mag Object Magnitude : V = 12.94 mag Estimated Magnitude Drop : 0.8 mag Estimated Max. Duration : 8.6 sec Object Mean Diameter : 110 km (src: astorb) Speed of the shadow : 12.8 km/s Elongation to Moon & Sun : 58° (sunlit = 61%), Sun = 160° Cross-track uncertainty : 1.3 mas = 1 km = 0.02 path-width (1-sig) RUWE and duplicate source : 1.02 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#175 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0 |
More Data and Informations |
---|
(If error 404: link not valid which means no data available)
Aladin Sky Atlas |
---|
Aladin Lite direct link (has Gaia overlay) |