2022-08-04 / 4UC 383-161659 / (122) Gerda
# | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
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1 | show | Gregor Krannich | O+ | CCD | M350 | DE | GPS++ | 20:24:01 | 20:25:14.06 | 20:25:15.71 | 20:26:31 | 0.26 | 0.26 | 1.65 | 21.6 |
2 | show | Peter Nosal | O+ | CCD | M250 | SK | NTP+ | 20:23:12 | 20:24:36.9 | 20:24:42.4 | 20:16:15 | 0.3 | 0.3 | 5.50 | 72.0 |
3 | show | Peter Delincak | O- | CCD | M400 | SK | 20:23:29 | 20:25:30 | |||||||
4 | show | Stefan Meister | O? | CCD | M500 | CH | GPS++ | 20:25:00 | 20:25:25.0 | 20:25:31.2 | 20:26:00 | 2.0 | 2.0 | 6.20 | 81.2 |
4 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):JPL#64 : 031a144d-9246-4981-b5ea-e2af4a40138f [db: observed] |
Using prediction 031a144d-9246-4981-b5ea-e2af4a40138f for map and profile fit
Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: Size = 103 x 27 km a',b' = 51.3, 13.3 km X0,Y0 = 2010.7, 37.5 km Mean diameter = 52 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. |
Sky projection (artificial light) for occ. time: 2022-08-04, 20:25 UT (JD = 2459796.351)
DAMIT | Q | P (h) | λ, β | JD0 | JD-JD0 | φ0 | Version | Modified | Vol-equiv D | Cmnt |
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# 968 | None | 10.687 | 23°, 20° | 2.448328e6 | 11468.4 | 0.0° | None | None | not scaled | 2016-01-04 |
# 969 | None | 10.687 | 201°, 22° | 2.448328e6 | 11468.4 | 0.0° | None | None | not scaled | 2016-01-04 |
Image size: 300px. Transparent image background for copy & paste
Map with groundtrack and observer stations |
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Event Details |
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Occultation UUID [and DB] : 031a144d-9246-4981-b5ea-e2af4a40138f [observed] Occultation Date + Time : 2022-08-04 at 20:23:30 UT +/- 0.02 min [1] Object Designation : (122) Gerda Orbit Class : MBA Star Designation : GDR3 6890664355097780352 Star Coordinates (ICRF) : RA = 21 26 16.2223, DE = -13 27 55.626 [2] Star Magnitudes : G = 13.97 mag, RP = 13.3 mag, BP = 14.48 mag Object Magnitude : V = 12.43 mag Estimated Magnitude Drop : 0.2 mag Estimated Max. Duration : 6.3 sec Object Mean Diameter : 82 km (src: astorb) Speed of the shadow : 13.1 km/s Elongation to Moon & Sun : 105° (sunlit = 43%), Sun = 173° Cross-track uncertainty : 2.7 mas = 4 km = 0.06 path-width (1-sig) RUWE and duplicate source : 1.06 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#64 [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) |