2019-03-08 / 4UC 512-053810 / (1093) Freda
# | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
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1 | show | Malcolm Jennings | O+ | VID | M276 | UK | RAD++ | 02:36:00 | 02:41:38.54 | 02:41:47.50 | 02:46:00 | 0.06 | 0.06 | 8.96 | 79.7 |
2 | show | Peter Tickner | O+ | CCD | M356 | UK | GPS | 02:39:29 | 02:41:45.05 | 02:41:52.85 | 02:44:08 | 0.20 | 0.20 | 7.80 | 69.4 |
3 | show | Peter Birtwhistle | O+ | CCD | M405 | UK | NTP | 02:41:31 | 02:41:49.36 | 02:41:55.98 | 02:42:06 | 0.05 | 0.05 | 6.62 | 58.9 |
4 | show | Tim Haymes | O+ | VID | M203 | UK | GPS++ | 02:38:46 | 02:41:44.36 | 02:41:53.00 | 02:44:40 | 0.32 | 0.32 | 8.64 | 76.9 |
5 | show | Simon Kidd | O+ | CCD | M350 | UK | GPS++ | 02:40:00 | 02:41:45.90 | 02:41:48.52 | 02:43:15 | 0.23 | 0.07 | 2.62 | 23.3 |
6 | show | Gordon Ewen | O+ | CCD | M250 | UK | NTP | 02:30:21 | 02:41:48.66 | 02:41:50.49 | 02:44:23 | 0.31 | 0.31 | 1.83 | 16.3 |
6 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):JPL#60 : 19d8ce01-b04d-4101-a37e-49e0bfe51760 [db: observed] |
Using prediction 19d8ce01-b04d-4101-a37e-49e0bfe51760 for map and profile fit
Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: Size = 108 x 81 km a',b' = 54.2, 40.4 km X0,Y0 = -1751.3, 10.9 km Mean diameter = 94 km From 6 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] : 19d8ce01-b04d-4101-a37e-49e0bfe51760 [observed] Occultation Date + Time : 2019-03-08 at 02:36:57 UT +/- 0.03 min [1] Object Designation : (1093) Freda Orbit Class : MBA Star Designation : GDR3 1229494728476162304 Star Coordinates (ICRF) : RA = 14 04 53.8224, DE = +12 20 53.542 [2] Star Magnitudes : G = 13.64 mag, RP = 13.11 mag, BP = 14.0 mag Object Magnitude : V = 14.4 mag Estimated Magnitude Drop : 1.2 mag Estimated Max. Duration : 13.1 sec Object Mean Diameter : 117 km (src: astorb) Speed of the shadow : 8.9 km/s Elongation to Moon & Sun : 152° (sunlit = 2%), Sun = 137° Cross-track uncertainty : 6.0 mas = 10 km = 0.09 path-width (1-sig) RUWE and duplicate source : 0.97 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#60 [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) |