2021-08-26 / TYC 0009-00303-1 / (385) Ilmatar
| # | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | show | Jean-Marie Laugier | O+ | CCD | V112 | FR | NTP | 21:28:03 | 21:31:11.06 | 21:31:17.60 | 21:33:01 | 0.12 | 0.12 | 6.54 | 70.0 |
| 2 | show | Florian Signoret | O+ | VID | L80 | FR | GPS++ | 21:26:45 | 21:31:04.28 | 21:31:10.84 | 21:33:43 | 0.08 | 0.08 | 6.56 | 70.2 |
| 3 | show | Matthieu Conjat | O+ | CCD | M400 | FR | NTP | 21:30:49 | 21:31:02.77 | 21:31:09.28 | 21:32:07 | 0.50 | 0.50 | 6.51 | 69.7 |
3 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):| JPL#124 : 73da3ce1-3a7b-4d3f-9979-0e5b80611b47 [db: observed] |
Using prediction 73da3ce1-3a7b-4d3f-9979-0e5b80611b47 for map and profile fit
| Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: Size = 75 x 31 km a',b' = 37.6, 15.7 km X0,Y0 = -121.0, 33.1 km Mean diameter = 49 km From 3 chords (VID,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: 2021-08-26, 21:30 UT (JD = 2459453.396)
| DAMIT | Q | P (h) | λ, β | JD0 | JD-JD0 | φ0 | Version | Modified | Vol-equiv D | Cmnt |
|---|---|---|---|---|---|---|---|---|---|---|
| # 5268 | 1.0 | 62.540 | 51°, 55° | 2.457553e6 | 1900.4 | 0.0° | None | 2020-10-05 | not scaled | 2019-10-23 |
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] : 73da3ce1-3a7b-4d3f-9979-0e5b80611b47 [observed] Occultation Date + Time : 2021-08-26 at 21:24:42 UT +/- 0.01 min [1] Object Designation : (385) Ilmatar Orbit Class : MBA Star Designation : GDR3 2747720828153800576 Star Coordinates (ICRF) : RA = 00 20 47.2471, DE = +06 44 23.709 [2] Star Magnitudes : G = 8.76 mag, RP = 8.06 mag, BP = 9.3 mag Object Magnitude : V = 12.88 mag Estimated Magnitude Drop : 4.1 mag Estimated Max. Duration : 8.6 sec Object Mean Diameter : 92 km (src: astorb) Speed of the shadow : 10.7 km/s Elongation to Moon & Sun : 20° (sunlit = 80%), Sun = 146° Cross-track uncertainty : 3.3 mas = 5 km = 0.06 path-width (1-sig) RUWE and duplicate source : 0.91 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#124 [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) |