2020-08-09 / 4UC 543-054833 / (16956) 1998 MQ11
# | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
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1 | show | Jiri Polak | O+ | CCD | M303 | CZ | GPS++ | 20:25:36 | 20:27:28.47 | 20:27:29.87 | 20:29:36 | 0.10 | 0.10 | 1.40 | 39.1 |
2 | show | Michal Rottenborn | O+ | CCD | M303 | CZ | GPS++ | 20:25:31 | 20:27:28.38 | 20:27:29.88 | 20:29:31 | 0.10 | 0.10 | 1.50 | 41.8 |
3 | show | Jiri Kubanek | O+ | CCD | M203 | CZ | GPS++ | 20:25:28 | 20:27:28.30 | 20:27:29.95 | 20:29:37 | 0.15 | 0.15 | 1.65 | 46.0 |
3 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):JPL#51 : fb918e64-e4c8-4aeb-8f74-5f2557969b0c [db: observed] |
Using prediction fb918e64-e4c8-4aeb-8f74-5f2557969b0c for map and profile fit
Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: Size = 61 x 18 km a',b' = 30.5, 9.2 km X0,Y0 = -3659.9, 32.1 km Mean diameter = 34 km From 3 chords (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] : fb918e64-e4c8-4aeb-8f74-5f2557969b0c [observed] Occultation Date + Time : 2020-08-09 at 20:27:15 UT +/- 0.02 min [1] Object Designation : (16956) 1998 MQ11 Orbit Class : JTRO Star Designation : GDR3 1247757341735857280 Star Coordinates (ICRF) : RA = 13 44 38.9496, DE = +18 31 38.681 [2] Star Magnitudes : G = 12.99 mag, RP = 12.19 mag, BP = 13.68 mag Object Magnitude : V = 19.01 mag Estimated Magnitude Drop : 6.0 mag Estimated Max. Duration : 0.9 sec Object Mean Diameter : 24 km (src: astorb) Speed of the shadow : 27.9 km/s Elongation to Moon & Sun : 155° (sunlit = 67%), Sun = 63° Cross-track uncertainty : 1.7 mas = 7 km = 0.31 path-width (1-sig) RUWE and duplicate source : 0.93 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#51 [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) |