2020-10-24 / 4UC 553-031781 / (971) Alsatia
# | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
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1 | show | Faustino Garcia | O+ | CCD | M250 | ES | NTP | 01:45:42 | 01:48:05.25 | 01:48:13.50 | 01:50:44 | 0.12 | 0.12 | 8.25 | 76.7 |
2 | show | Roland Boninsegna | O+ | VID | M400 | BE | GPS++ | 01:48:18 | 01:50:02.36 | 01:50:10.04 | 01:52:10 | 0.04 | 0.04 | 7.68 | 71.4 |
3 | show | Jean Bourgeois | O- | VID | M356 | BE | 01:49:30 | 01:50:35 |
3 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):JPL#63 : 48e95414-27b1-473d-a634-323cf73347b4 [db: observed] |
JPL#63 : 835e6f79-02f2-47e9-b879-3d2eecb47e61 [db: observed] |
Using prediction 48e95414-27b1-473d-a634-323cf73347b4 for map and profile fit
Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: X0,Y0 = 1533.9, 28.7 km Circular diameter = 77 km From 2 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 |
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Event Details |
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Occultation UUID [and DB] : 48e95414-27b1-473d-a634-323cf73347b4 [observed] Occultation Date + Time : 2020-10-24 at 01:51:48 UT +/- 0.01 min [1] Object Designation : (971) Alsatia Orbit Class : MBA Star Designation : GDR3 3377828298966887552 Star Coordinates (ICRF) : RA = 06 44 02.9234, DE = +20 26 35.208 [2] Star Magnitudes : G = 12.81 mag, RP = 12.61 mag, BP = 12.93 mag Object Magnitude : V = 14.1 mag Estimated Magnitude Drop : 1.6 mag Estimated Max. Duration : 6.9 sec Object Mean Diameter : 64 km (src: astorb) Speed of the shadow : 9.3 km/s Elongation to Moon & Sun : 152° (sunlit = 56%), Sun = 111° Cross-track uncertainty : 1.7 mas = 2 km = 0.03 path-width (1-sig) RUWE and duplicate source : 0.93 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#63 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0 |
More Data and Informations |
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(If error 404: link not valid which means no data available)
Aladin Sky Atlas |
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Aladin Lite direct link (has Gaia overlay) |