2022-07-20 / 4UC 492-147628 / (972) Cohnia
# | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
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1 | show | Peter Nosal | O+ | CCD | M250 | SK | NTP+ | 01:51:56 | 01:53:11.69 | 01:53:20.59 | 01:54:46 | 0.10 | 0.10 | 8.90 | 70.3 |
2 | show | Daniel Blazewicz | O+ | CCD | M350 | PL | NTP+ | 01:51:30 | 01:53:28.73 | 01:53:39.48 | 01:56:34 | 0.08 | 0.07 | 10.75 | 84.9 |
3 | show | Marcin Filipek | O+ | CCD | M250 | PL | GPS++ | 01:52:41 | 01:53:34.67 | 01:53:38.6 | 01:54:32 | 0.15 | 0.3 | 3.93 | 31.0 |
3 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):JPL#60 : 586d4768-ae59-4561-ba6a-76c0ddefa04a [db: observed] |
Using prediction 586d4768-ae59-4561-ba6a-76c0ddefa04a for map and profile fit
Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: Size = 96 x 66 km a',b' = 48.0, 33.2 km X0,Y0 = 2273.0, 37.1 km Mean diameter = 80 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] : 586d4768-ae59-4561-ba6a-76c0ddefa04a [observed] Occultation Date + Time : 2022-07-20 at 01:46:34 UT +/- 0.07 min [1] Object Designation : (972) Cohnia Orbit Class : MBA Star Designation : GDR3 2758073589123182080 Star Coordinates (ICRF) : RA = 23 41 03.6748, DE = +08 14 33.321 [2] Star Magnitudes : G = 13.11 mag, RP = 12.59 mag, BP = 13.47 mag Object Magnitude : V = 13.96 mag Estimated Magnitude Drop : 1.3 mag Estimated Max. Duration : 9.5 sec Object Mean Diameter : 76 km (src: astorb) Speed of the shadow : 7.9 km/s Elongation to Moon & Sun : 25° (sunlit = 55%), Sun = 118° Cross-track uncertainty : 6.3 mas = 8 km = 0.11 path-width (1-sig) RUWE and duplicate source : 1.03 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#60 [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) |