2020-01-16 / TYC 1372-01714-1 / (407) Arachne
# | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
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1 | show | Jerry Bardecker | O+ | VID | M305 | US | GPS++ | 03:25:07 | 03:26:29.99 | 03:26:34.75 | 03:29:00 | 0.01 | 0.01 | 4.76 | 58.5 |
2 | show | Pietro Baruffetti | O+ | VID | M300 | IT | GPS++ | 03:13:50 | 03:14:50.21 | 03:14:58.67 | 03:16:26 | 0.04 | 0.04 | 8.46 | 104.1 |
3 | show | Pierre Le Cam | O- | CCD | M250 | FR | 03:12:30 | 03:18:31 |
3 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):JPL#67 : 4902a228-ac5b-4427-a688-c703767a7d38 [db: observed] |
Using prediction 4902a228-ac5b-4427-a688-c703767a7d38 for map and profile fit
Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: X0,Y0 = 139.5, 7.3 km Circular diameter = 108 km From 2 chords (VID) 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: 2020-01-16, 03:26 UT (JD = 2458864.643)
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 | 12417.6 | 0.0° | None | None | not scaled | 2016-01-04 |
# 814 | None | 22.626 | 241°, -63° | 2.446447e6 | 12417.6 | 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] : 4902a228-ac5b-4427-a688-c703767a7d38 [observed] Occultation Date + Time : 2020-01-16 at 03:20:33 UT +/- 0.01 min [1] Object Designation : (407) Arachne Orbit Class : MBA Star Designation : GDR3 0865635132204436480 Star Coordinates (ICRF) : RA = 07 31 52.3866, DE = +22 10 07.001 [2] Star Magnitudes : G = 9.02 mag, RP = 8.25 mag, BP = 9.68 mag Object Magnitude : V = 12.62 mag Estimated Magnitude Drop : 3.6 mag Estimated Max. Duration : 7.8 sec Object Mean Diameter : 95 km (src: astorb) Speed of the shadow : 12.3 km/s Elongation to Moon & Sun : 76° (sunlit = 66%), Sun = 176° Cross-track uncertainty : 1.7 mas = 2 km = 0.02 path-width (1-sig) RUWE and duplicate source : 1.04 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) |