2021-04-02 / 4UC 403-052356 / (409) Aspasia
| # | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | show | Gerard Vaudescal | O+ | CCD | M254 | FR | GPS+ | 21:49:01 | 21:50:14.05 | 21:50:32.75 | 21:51:40 | 0.17 | 0.12 | 18.70 | 168.3 |
| 2 | show | Jacques Sanchez | O+ | VID | M355 | FR | GPS++ | 21:46:55 | 21:50:09.62 | 21:50:24.01 | 21:53:20 | 0.16 | 0.08 | 14.39 | 129.5 |
| 3 | show | Michel Boutet | O+ | VID | M300 | FR | GPS++ | 21:46:50 | 21:50:12.01 | 21:50:24.23 | 21:53:21 | 0.18 | 0.08 | 12.22 | 110.0 |
| 4 | show | J.J. Castellani | O+ | VID | M400 | FR | GPS++ | 21:49:10 | 21:50:16.29 | 21:50:35.71 | 21:51:32 | 0.06 | 0.08 | 19.42 | 174.8 |
| 5 | show | Dorian Cazeneuve | O+ | CCD | V112 | FR | NTP | 21:47:59 | 21:50:15.36 | 21:50:31.92 | 21:53:57 | 0.15 | 0.15 | 16.56 | 149.0 |
| 6 | show | Michael OConnell | O+ | VID | M355 | IE | GPS++ | 21:50:52 | 21:51:33.82 | 21:51:53.48 | 21:52:52 | 0.14 | 0.12 | 19.66 | 176.9 |
6 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):| JPL#124 : 04b681fa-d12f-4585-89c3-09174cbdb997 [db: observed] |
Using prediction 04b681fa-d12f-4585-89c3-09174cbdb997 for map and profile fit
| Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: Size = 184 x 159 km a',b' = 92.1, 79.6 km X0,Y0 = -2440.4, 18.4 km Mean diameter = 171 km From 6 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: 2021-04-02, 21:49 UT (JD = 2459307.409)
| DAMIT | Q | P (h) | λ, β | JD0 | JD-JD0 | φ0 | Version | Modified | Vol-equiv D | Cmnt |
|---|---|---|---|---|---|---|---|---|---|---|
| # 215 | None | 9.021 | 3°, 30° | 2.44431e6 | 14997.4 | 0.0° | None | 2011-04-11 | 173.0 +/- 17.0 km | 2011-03-28 |
| # 715 | 4.0 | 9.021 | 4°, 29° | 2.44431e6 | 14997.4 | 0.0° | None | 2017-06-19 | 164.0 +/- 3.0 km | 2017-06-19 |
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] : 04b681fa-d12f-4585-89c3-09174cbdb997 [observed] Occultation Date + Time : 2021-04-02 at 21:42:59 UT +/- 0.02 min [1] Object Designation : (409) Aspasia Orbit Class : MBA Star Designation : GDR3 3761451273149868800 Star Coordinates (ICRF) : RA = 10 42 19.2453, DE = -09 30 25.635 [2] Star Magnitudes : G = 11.77 mag, RP = 11.02 mag, BP = 12.39 mag Object Magnitude : V = 11.25 mag Estimated Magnitude Drop : 0.5 mag Estimated Max. Duration : 18.0 sec Object Mean Diameter : 162 km (src: astorb) Speed of the shadow : 9.0 km/s Elongation to Moon & Sun : 97° (sunlit = 67%), Sun = 148° Cross-track uncertainty : 2.3 mas = 2 km = 0.02 path-width (1-sig) RUWE and duplicate source : 1.18 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#124 Object is a Gaia mass determination target ! [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) |