2021-04-22 / 4UC 565-011281 / (142) Polana
# | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
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1 | show | Jordi Marco | O+ | CCD | M235 | ES | NTP | 19:59:10 | 19:59:56.50 | 19:59:57.68 | 20:00:43 | 0.06 | 0.06 | 1.18 | 46.3 |
2 | show | Carles Schnabel | O+ | VID | M400 | ES | GPS++ | 19:58:12 | 19:59:56.13 | 19:59:57.41 | 20:02:01 | 0.06 | 0.06 | 1.28 | 50.2 |
2 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):JPL#68 : ac5829e5-83cf-4ca7-9004-567d81f5945b [db: observed] |
Using prediction ac5829e5-83cf-4ca7-9004-567d81f5945b for map and profile fit
Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: Circular profile fit was not successful ... 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] : ac5829e5-83cf-4ca7-9004-567d81f5945b [observed] Occultation Date + Time : 2021-04-22 at 19:57:47 UT +/- 0.0 min [1] Object Designation : (142) Polana Orbit Class : MBA Star Designation : GDR3 0146472098625499520 Star Coordinates (ICRF) : RA = 04 39 50.0784, DE = +22 56 07.455 [2] Star Magnitudes : G = 11.37 mag, RP = 10.47 mag, BP = 12.22 mag Object Magnitude : V = 16.11 mag Estimated Magnitude Drop : 4.8 mag Estimated Max. Duration : 1.4 sec Object Mean Diameter : 55 km (src: astorb) Speed of the shadow : 39.2 km/s Elongation to Moon & Sun : 82° (sunlit = 76%), Sun = 39° Cross-track uncertainty : 0.3 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.17 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#68 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) |