2021-12-07 / 4UC 533-004773 / (981) Martina
# | 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++ | 23:13:54 | 23:16:08.59 | 23:16:12.46 | 23:17:54 | 0.03 | 0.04 | 3.87 | 26.7 |
2 | show | Michal Rottenborn | O+ | CCD | M254 | CZ | GPS++ | 23:13:54 | 23:16:08.42 | 23:16:12.52 | 23:17:54 | 0.05 | 0.05 | 4.10 | 28.3 |
3 | show | Jiri Kubanek | O+ | CCD | M303 | CZ | GPS++ | 23:13:41 | 23:16:04.97 | 23:16:09.58 | 23:18:00 | 0.03 | 0.03 | 4.61 | 31.8 |
4 | show | Jiri Kubanek | O+ | CCD | M200 | CZ | GPS++ | 23:13:41 | 23:16:05.71 | 23:16:10.60 | 23:18:00 | 0.04 | 0.04 | 4.89 | 33.7 |
4 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):JPL#63 : 08585aea-4a10-42a4-9aea-1104e868964c [db: observed] |
Using prediction 08585aea-4a10-42a4-9aea-1104e868964c for map and profile fit
Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: Size = 36 x 34 km a',b' = 18.1, 17.0 km X0,Y0 = 640.6, 43.1 km Mean diameter = 35 km From 4 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] : 08585aea-4a10-42a4-9aea-1104e868964c [observed] Occultation Date + Time : 2021-12-07 at 23:24:04 UT +/- 0.03 min [1] Object Designation : (981) Martina Orbit Class : MBA Star Designation : GDR3 0081774012652406912 Star Coordinates (ICRF) : RA = 02 45 27.4630, DE = +16 28 09.375 [2] Star Magnitudes : G = 12.46 mag, RP = 11.91 mag, BP = 12.84 mag Object Magnitude : V = 15.46 mag Estimated Magnitude Drop : 3.1 mag Estimated Max. Duration : 4.2 sec Object Mean Diameter : 29 km (src: astorb) Speed of the shadow : 6.9 km/s Elongation to Moon & Sun : 97° (sunlit = 18%), Sun = 148° Cross-track uncertainty : 3.0 mas = 4 km = 0.14 path-width (1-sig) RUWE and duplicate source : 1.08 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#63 [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) |