2020-02-10 / 4UC 610-041692 / (87) Sylvia
| # | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | show | Petr Zeleny | O+ | CCD | M254 | CZ | NTP | 21:43:30 | 21:46:05.58 | 21:46:16.86 | 21:48:45 | 0.43 | 0.43 | 11.28 | 133.1 |
| 2 | show | Malcolm Jennings | O+ | VID | M276 | UK | RAD++ | 21:38:00 | 21:47:46.78 | 21:48:06.06 | 21:55:00 | 1.17 | 1.17 | 19.28 | 227.5 |
| 3 | show | Peter Tickner | O+ | CCD | M356 | UK | GPS | 21:46:30 | 21:47:49.83 | 21:48:12.06 | 21:49:30 | 0.18 | 0.25 | 22.23 | 262.3 |
| 4 | show | Peter Birtwhistle | O+ | CCD | M405 | UK | NTP | 21:47:44 | 21:47:52.45 | 21:48:15.00 | 21:48:18 | 0.42 | 0.17 | 22.55 | 266.1 |
| 5 | show | Adrian Jones | O+ | VID | M305 | UK | GPS++ | 21:46:05 | 21:47:46.70 | 21:48:11.56 | 21:49:57 | 0.20 | 0.10 | 24.86 | 293.3 |
| 6 | show | Philip Denyer | O+ | VID | M235 | UK | GPS++ | 21:47:10 | 21:47:41.05 | 21:48:07.05 | 21:48:26 | 0.36 | 0.36 | 26.00 | 306.8 |
| 7 | show | John Talbot | O+ | VID | M303 | UK | GPS++ | 21:46:40 | 21:47:48.90 | 21:48:15.62 | 21:50:38 | 0.60 | 0.28 | 26.72 | 315.3 |
| 8 | show | Simon Kidd | O+ | CCD | M350 | UK | GPS++ | 21:45:45 | 21:47:41.14 | 21:48:10.66 | 21:50:00 | 0.20 | 0.21 | 29.52 | 348.3 |
8 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):| JPL#114 : e589e6a5-90aa-4265-b153-62164d0bbd98 [db: observed] |
Using prediction e589e6a5-90aa-4265-b153-62164d0bbd98 for map and profile fit
| Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: Size = 356 x 138 km a',b' = 178.0, 69.1 km X0,Y0 = -292.1, -8.6 km Mean diameter = 222 km From 8 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. |
Sky projection (artificial light) for occ. time: 2020-02-10, 21:45 UT (JD = 2458890.406)
| DAMIT | Q | P (h) | λ, β | JD0 | JD-JD0 | φ0 | Version | Modified | Vol-equiv D | Cmnt |
|---|---|---|---|---|---|---|---|---|---|---|
| # 148 | None | 5.184 | 71°, 66° | 2.44538690762e6 | 13503.5 | 0.0° | None | 2013-07-24 | 258.0 +/- 28.0 km | 2007-02-27 |
| # 719 | 4.0 | 5.184 | 72°, 68° | 2.44375e6 | 15140.4 | 0.0° | None | 2017-06-19 | 277.0 +/- 5.0 km | 2017-06-13 |
Image size: 300px. Transparent image background for copy & paste
| Map with groundtrack and observer stations |
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| Event Details |
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Occultation UUID [and DB] : e589e6a5-90aa-4265-b153-62164d0bbd98 [observed] Occultation Date + Time : 2020-02-10 at 21:46:41 UT +/- 0.02 min [1] Object Designation : (87) Sylvia Orbit Class : MBA Star Designation : GDR3 0880351064548876544 Star Coordinates (ICRF) : RA = 07 43 15.5117, DE = +31 53 57.595 [2] Star Magnitudes : G = 14.33 mag, RP = 13.92 mag, BP = 14.59 mag Object Magnitude : V = 12.64 mag Estimated Magnitude Drop : 0.2 mag Estimated Max. Duration : 22.1 sec Object Mean Diameter : 261 km (src: astorb) Speed of the shadow : 11.8 km/s Elongation to Moon & Sun : 52° (sunlit = 96%), Sun = 149° Cross-track uncertainty : 1.3 mas = 2 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.05 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#114 Object is a Gaia mass determination target ! [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) |