2022-01-03 / 4UC 475-009514 / (489) Comacina
| # | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | show | Carles Schnabel | O+ | VID | M280 | ES | GPS++ | 21:30:38 | 21:33:35.34 | 21:33:39.34 | 21:37:19 | 0.16 | 0.08 | 4.00 | 45.6 |
| 2 | show | Jordi Marco | O+ | CCD | M235 | ES | NTP+ | 21:31:31 | 21:33:31.35 | 21:33:39.14 | 21:35:31 | 0.60 | 0.60 | 7.79 | 88.8 |
| 3 | show | Joan Rovira | O+ | VID | M250 | ES | GPS++ | 21:30:20 | 21:33:29.19 | 21:33:40.87 | 21:36:20 | 0.08 | 0.08 | 11.68 | 133.2 |
| 4 | show | Antoni Selva | O+ | VID | M200 | ES | GPS++ | 21:31:37 | 21:33:31.49 | 21:33:43.33 | 21:35:36 | 0.32 | 0.32 | 11.84 | 135.0 |
| 5 | show | Gerard Vaudescal | O- | CCD | M254 | FR | 21:32:42 | 21:35:10 |
5 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):| JPL#134 : 91bade79-fa3a-4054-a4b6-95b969e508b8 [db: observed] |
Using prediction 91bade79-fa3a-4054-a4b6-95b969e508b8 for map and profile fit
| Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: Size = 161 x 126 km a',b' = 80.3, 62.9 km X0,Y0 = -912.7, 32.2 km Mean diameter = 142 km From 4 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: 2022-01-03, 21:33 UT (JD = 2459583.398)
| DAMIT | Q | P (h) | λ, β | JD0 | JD-JD0 | φ0 | Version | Modified | Vol-equiv D | Cmnt |
|---|---|---|---|---|---|---|---|---|---|---|
| # 809 | None | 9.023 | 88°, -43° | 2.445801e6 | 13782.4 | 0.0° | None | None | not scaled | 2016-01-04 |
| # 810 | None | 9.023 | 265°, -16° | 2.445801e6 | 13782.4 | 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] : 91bade79-fa3a-4054-a4b6-95b969e508b8 [observed] Occultation Date + Time : 2022-01-03 at 21:31:05 UT +/- 0.02 min [1] Object Designation : (489) Comacina Orbit Class : MBA Star Designation : GDR3 3238879578589770112 Star Coordinates (ICRF) : RA = 05 11 23.0296, DE = +04 53 39.670 [2] Star Magnitudes : G = 12.92 mag, RP = 12.46 mag, BP = 13.21 mag Object Magnitude : V = 13.55 mag Estimated Magnitude Drop : 1.1 mag Estimated Max. Duration : 12.2 sec Object Mean Diameter : 139 km (src: astorb) Speed of the shadow : 11.4 km/s Elongation to Moon & Sun : 133° (sunlit = 2%), Sun = 149° Cross-track uncertainty : 1.0 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 0.99 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#134 [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) |