2021-10-09 / 4UC 508-041228 / (688) Melanie
# | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
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1 | show | Chad Ellington | O+ | VID | M250 | DE | GPS++ | 04:18:21 | 04:19:49.53 | 04:19:52.47 | 04:21:26 | 0.13 | 0.13 | 2.94 | 52.0 |
2 | show | Simon Kidd | O+ | CCD | M350 | UK | GPS++ | 04:18:31 | 04:19:29.55 | 04:19:32.29 | 04:20:31 | 0.03 | 0.03 | 2.74 | 48.5 |
3 | show | Jiri Polak | O- | CCD | M303 | CZ | 04:18:19 | 04:22:19 | |||||||
4 | show | Michal Rottenborn | O- | CCD | M254 | CZ | 04:18:19 | 04:22:19 | |||||||
5 | show | Jiri Kubanek | O- | CCD | M303 | CZ | 04:18:20 | 04:22:22 |
5 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):JPL#100 : 7dd2159e-ea0a-4b45-8ddf-52e2017bc558 [db: observed] |
Using prediction 7dd2159e-ea0a-4b45-8ddf-52e2017bc558 for map and profile fit
Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: X0,Y0 = -1198.3, 25.3 km Circular diameter = 53 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] : 7dd2159e-ea0a-4b45-8ddf-52e2017bc558 [observed] Occultation Date + Time : 2021-10-09 at 04:22:37 UT +/- 0.01 min [1] Object Designation : (688) Melanie Orbit Class : MBA Star Designation : GDR3 3162798046873580672 Star Coordinates (ICRF) : RA = 07 26 48.9196, DE = +11 30 35.740 [2] Star Magnitudes : G = 13.23 mag, RP = 12.73 mag, BP = 13.57 mag Object Magnitude : V = 16.71 mag Estimated Magnitude Drop : 3.5 mag Estimated Max. Duration : 2.3 sec Object Mean Diameter : 41 km (src: astorb) Speed of the shadow : 17.7 km/s Elongation to Moon & Sun : 121° (sunlit = 10%), Sun = 85° Cross-track uncertainty : 0.3 mas = 0 km = 0.02 path-width (1-sig) RUWE and duplicate source : 1.41 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#100 [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) |