2011-09-17 / TYC 1866-01429-1 / (177) Irma
# | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
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1 | show | Thierry Midavaine | O+ | VID | M254 | FR | GPS++ | 03:03:53 | 03:04:52.31 | 03:04:55.15 | 03:06:06 | 0.04 | 0.04 | 2.84 | 57.4 |
2 | show | J. Lecacheux et al | O+ | VID | M1020 | FR | GPS++ | 03:00:05 | 03:04:53.68 | 03:04:55.05 | 03:10:06 | 0.01 | 0.01 | 1.37 | 27.7 |
3 | show | E. Frappa/A. Klotz | O- | CCD | M250 | FR | 03:04:10 | 03:05:40 | |||||||
4 | show | Marcin Filipek | O- | VIS | M165 | PL | 03:03:00 | 03:08:00 |
4 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):JPL#115 : dd6604bd-1a82-4697-aeef-609c638469e8 [db: observed] |
JPL#115 : 1efc1a9a-ef0a-4be6-b24e-944d2c0a0057 [db: observed] |
Using prediction dd6604bd-1a82-4697-aeef-609c638469e8 for map and profile fit
Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: X0,Y0 = 156.3, -11.3 km Circular diameter = 131 km From 2 chords (VID) 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] : dd6604bd-1a82-4697-aeef-609c638469e8 [observed] Occultation Date + Time : 2011-09-17 at 03:07:09 UT +/- 0.01 min [1] Object Designation : (177) Irma Orbit Class : MBA Star Designation : GDR3 3428196411239602560 Star Coordinates (ICRF) : RA = 05 51 34.7813, DE = +24 51 57.519 [2] Star Magnitudes : G = 10.64 mag, RP = 10.12 mag, BP = 10.98 mag Object Magnitude : V = 14.11 mag Estimated Magnitude Drop : 3.5 mag Estimated Max. Duration : 3.6 sec Object Mean Diameter : 73 km (src: astorb) Speed of the shadow : 20.2 km/s Elongation to Moon & Sun : 42° (sunlit = 81%), Sun = 86° Cross-track uncertainty : 0.7 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.8 mas, dup.src = 1 (0:false, 1:true) Ephemeris Reference : JPL#115 [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) |