2025-02-21 / UCAC4 511-003714 / (1108) Demeter
| # | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | show | Jiri Polak | O+ | VID | M300 | CZ | GPS | 19:22:02 | 19:24:05.46 | 19:24:06.23 | 19:26:02 | 0.03 | 0.02 | 0.77 | 23.3 |
| 2 | show | Michal Rottenborn | O+ | VID | M254 | CZ | GPS | 19:22:06 | 19:24:05.49 | 19:24:06.21 | 19:26:06 | 0.02 | 0.02 | 0.72 | 21.7 |
| 3 | show | Jiri Kubanek | O+ | VID | M303 | CZ | GPS | 19:22:34 | 19:24:06.17 | 19:24:06.68 | 19:25:33 | 0.09 | 0.06 | 0.51 | 15.4 |
| 4 | show | Jiri Kubanek | O+ | VID | M200 | CZ | GPS | 19:22:39 | 19:24:06.68 | 19:24:07.09 | 19:25:39 | 0.05 | 0.05 | 0.41 | 12.4 |
| 5 | show | Oliver Kloes | O+ | CCD | M254 | DE | GPS | 19:22:30 | 19:23:58.05 | 19:23:58.65 | 19:25:30 | 0.15 | 0.15 | 0.60 | 18.1 |
5 observations found in db: sodis
Available (probably) matching predictions (click on the link to switch):| JPL#55 : 48e3e210-86c8-11ef-78cd-4d4affa34c94 [db: asteroids] |
Using prediction 48e3e210-86c8-11ef-78cd-4d4affa34c94 for map and profile fit
| Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: Size = 30 x 18 km a',b' = 14.9, 9.2 km X0,Y0 = 346.5, 23.5 km Mean diameter = 23 km From 5 chords (CCD,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: 2025-02-21, 19:23 UT (JD = 2460728.308)
| DAMIT | Q | P (h) | λ, β | JD0 | JD-JD0 | φ0 | Version | Modified | Vol-equiv D | Cmnt |
|---|---|---|---|---|---|---|---|---|---|---|
| # 4445 | 1.0 | 9.834 | 302°, -11° | 2.45743e6 | 3298.3 | 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] : 48e3e210-86c8-11ef-78cd-4d4affa34c94 [asteroids] Occultation Date + Time : 2025-02-21 at 19:21:55 UT +/- 0.0 min [1] Object Designation : (1108) Demeter Orbit Class : MBA Star Designation : GDR3 0072812722303722496 Star Coordinates (ICRF) : RA = 02 25 40.8140, DE = +12 06 24.269 [2] Star Magnitudes : G = 11.27 mag, RP = 10.75 mag, BP = 11.62 mag Object Magnitude : V = 17.12 mag Estimated Magnitude Drop : 5.9 mag Estimated Max. Duration : 0.9 sec Object Mean Diameter : 25.6 km (src: astorb) Speed of the shadow : 30.2 km/s Elongation to Moon & Sun : 142° (sunlit = 40%), Sun = 65° Cross-track uncertainty : 0.2 mas = 0 km = 0.02 path-width (1-sig) RUWE and duplicate source : 1.07 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#55 [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) |