2022-10-20 / 4UC 389-132219 / (407) Arachne
# | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
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1 | show | Jan Manek | O+ | CCD | M356 | CZ | GPS++ | 18:17:22 | 18:19:18.0 | 18:19:22.3 | 18:21:22 | 0.6 | 0.6 | 4.30 | 48.2 |
2 | show | Marek Zawilski | O+ | CCD | M203 | PL | GPS+ | 18:18:11 | 18:19:42.8 | 18:19:53.2 | 18:22:01 | 0.4 | 0.6 | 10.40 | 116.5 |
2 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):JPL#67 : d221c729-45cb-41d5-b7f6-16ecfdf07c0f [db: observed] |
Using prediction d221c729-45cb-41d5-b7f6-16ecfdf07c0f for map and profile fit
Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: X0,Y0 = 1299.8, 87.0 km Circular diameter = 189 km From 2 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: 2022-10-20, 18:18 UT (JD = 2459873.263)
DAMIT | Q | P (h) | λ, β | JD0 | JD-JD0 | φ0 | Version | Modified | Vol-equiv D | Cmnt |
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# 813 | None | 22.626 | 43°, -58° | 2.446447e6 | 13426.3 | 0.0° | None | None | not scaled | 2016-01-04 |
# 814 | None | 22.626 | 241°, -63° | 2.446447e6 | 13426.3 | 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] : d221c729-45cb-41d5-b7f6-16ecfdf07c0f [observed] Occultation Date + Time : 2022-10-20 at 18:16:30 UT +/- 0.01 min [1] Object Designation : (407) Arachne Orbit Class : MBA Star Designation : GDR3 6900203202585699584 Star Coordinates (ICRF) : RA = 20 42 40.4501, DE = -12 23 05.286 [2] Star Magnitudes : G = 14.95 mag, RP = 14.47 mag, BP = 15.28 mag Object Magnitude : V = 13.86 mag Estimated Magnitude Drop : 0.3 mag Estimated Max. Duration : 8.5 sec Object Mean Diameter : 95 km (src: astorb) Speed of the shadow : 11.2 km/s Elongation to Moon & Sun : 156° (sunlit = 23%), Sun = 102° Cross-track uncertainty : 3.0 mas = 4 km = 0.05 path-width (1-sig) RUWE and duplicate source : 0.97 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#67 [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) |