2012-02-17 / 2UC 26033121 / (50000) Quaoar
# | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
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1 | show | E. Frappa/A. Klotz | O+ | CCD | M250 | FR | GPS++ | 04:23:48 | 04:28:08.1 | 04:29:06.5 | 04:33:19 | 2.0 | 2.5 | 58.40 | 1080.4 |
2 | show | Paolo Tanga | O+ | CCD | M355 | FR | NTP | 04:24:43 | 04:28:19.8 | 04:29:09.27 | 04:38:56 | 3.8 | 0.34 | 49.47 | 915.2 |
3 | show | Jean Lecacheux | O+ | VID | M212 | FR | GPS++ | 04:13:56 | 04:28:09.2 | 04:29:03.15 | 04:37:59 | 2.1 | 2.15 | 53.95 | 998.1 |
4 | show | Stefano Sposetti | O+ | VID | M400 | CH | GPS++ | 04:16:00 | 04:28:37.6 | 04:29:09.4 | 04:45:00 | 4.5 | 5.5 | 31.80 | 588.3 |
4 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):JPL#45 : b0e95584-617a-4bf7-a52e-548dcbdd8184 [db: observed] |
Using prediction b0e95584-617a-4bf7-a52e-548dcbdd8184 for map and profile fit
Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: Ellipse profile fit was not successful. Trying circular fit. Circular diameter = 1730 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 |
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Event Details |
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Occultation UUID [and DB] : b0e95584-617a-4bf7-a52e-548dcbdd8184 [observed] Occultation Date + Time : 2012-02-17 at 04:30:44 UT +/- 0.09 min [1] Object Designation : (50000) Quaoar Orbit Class : TNO Star Designation : GDR3 4125098801168495104 Star Coordinates (ICRF) : RA = 17 34 21.8456, DE = -15 42 10.494 [2] Star Magnitudes : G = 14.82 mag, RP = 13.9 mag, BP = 15.72 mag Object Magnitude : V = 18.96 mag Estimated Magnitude Drop : 4.2 mag Estimated Max. Duration : 60.9 sec Object Mean Diameter : 1126 km (src: astorb) Speed of the shadow : 18.5 km/s Elongation to Moon & Sun : 8° (sunlit = 24%), Sun = 64° Cross-track uncertainty : 2.3 mas = 72 km = 0.06 path-width (1-sig) RUWE and duplicate source : 0.97 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#45 Object is a "TNOs are cool" 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) |