2021-09-18 / 4UC 401-129671 / (1909) Alekhin
| # | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | show | Manfred Simon | O+ | CCD | M203 | DE | NTP | 20:00:41 | 20:02:08.25 | 20:02:09.94 | 20:03:41 | 0.10 | 0.10 | 1.69 | 11.5 |
| 2 | show | Gregor Krannich | O+ | CCD | M350 | DE | GPS++ | 20:01:01 | 20:02:05.30 | 20:02:06.70 | 20:03:21 | 0.01 | 0.01 | 1.40 | 9.5 |
| 3 | show | Bjoern Kattentidt | O+ | VID | M279 | DE | GPS++ | 19:59:42 | 20:01:46.61 | 20:01:48.09 | 20:04:10 | 0.02 | 0.02 | 1.48 | 10.1 |
| 4 | show | Jiri Kubanek | O+ | VID | M200 | CZ | GPS++ | 19:59:33 | 20:01:39.62 | 20:01:41.03 | 20:03:53 | 0.04 | 0.04 | 1.41 | 9.6 |
| 5 | show | Jiri Kubanek | O+ | CCD | M150 | CZ | GPS++ | 19:59:31 | 20:01:39.20 | 20:01:40.49 | 20:03:54 | 0.06 | 0.06 | 1.29 | 8.8 |
| 6 | show | Jiri Polak | O+ | CCD | M303 | CZ | GPS++ | 19:59:34 | 20:01:31.86 | 20:01:33.35 | 20:03:34 | 0.02 | 0.02 | 1.49 | 10.1 |
| 7 | show | Michal Rottenborn | O+ | CCD | M254 | CZ | GPS++ | 19:59:33 | 20:01:31.71 | 20:01:33.20 | 20:03:33 | 0.02 | 0.01 | 1.49 | 10.1 |
| 8 | show | Karel Halir | O+ | VID | M507 | CZ | GPS++ | 19:59:32 | 20:01:28.44 | 20:01:30.07 | 20:03:32 | 0.01 | 0.01 | 1.63 | 11.1 |
8 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):| JPL#58 : 20dbc5b2-aafd-4da0-b257-37c77841726c [db: observed] |
Using prediction 20dbc5b2-aafd-4da0-b257-37c77841726c for map and profile fit
| Ellipse and circular profile fits to the timings (chords) |
|---|
|
Auto-Fit Result: Ellipse profile fit was not successful. Trying circular fit. Circular diameter = 14 km From 8 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. |
| Map with groundtrack and observer stations |
|---|
| Event Details |
|---|
Occultation UUID [and DB] : 20dbc5b2-aafd-4da0-b257-37c77841726c [observed] Occultation Date + Time : 2021-09-18 at 20:04:52 UT +/- 0.02 min [1] Object Designation : (1909) Alekhin Orbit Class : MBA Star Designation : GDR3 2617866477688597632 Star Coordinates (ICRF) : RA = 21 53 29.9605, DE = -09 56 17.711 [2] Star Magnitudes : G = 10.45 mag, RP = 10.07 mag, BP = 10.69 mag Object Magnitude : V = 16.48 mag Estimated Magnitude Drop : 6.0 mag Estimated Max. Duration : 2.5 sec Object Mean Diameter : 17 km (src: astorb) Speed of the shadow : 6.8 km/s Elongation to Moon & Sun : 8° (sunlit = 95%), Sun = 151° Cross-track uncertainty : 2.3 mas = 2 km = 0.15 path-width (1-sig) RUWE and duplicate source : 1.07 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#58 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0 |
| More Data and Informations |
|---|
(If error 404: link not valid which means no data available)
| Aladin Sky Atlas |
|---|
| Aladin Lite direct link (has Gaia overlay) |