2026-09-20 / UCAC4 399-096501 / (409) Aspasia
| # | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | show | Deborah Smith | O+ | VID | M300 | ES | GPS | 22:55:15 | 22:56:06.923 | 22:56:22.904 | 22:57:14 | 0.114 | 0.114 | 15.98 | 172.6 |
| 2 | show | Deborah Smith | O+ | VID | M250 | ES | GPS | 22:55:10 | 22:56:03.103 | 22:56:16.118 | 22:57:10 | 0.140 | 0.140 | 13.01 | 140.5 |
2 observations found in db: sodis
Available (probably) matching predictions (click on the link to switch):| JPL137 : fabd2f90-d9b0-11f1-43f3-82adffdf9bc7 [db: observed] |
Using prediction fabd2f90-d9b0-11f1-43f3-82adffdf9bc7 for map and profile fit
| Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: X0,Y0 = -957.1, -1.8 km Circular diameter = 180 km From 2 chords (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: 2026-09-20, 22:56 UT (JD = 2461304.456)
| DAMIT | Q | P (h) | λ, β | JD0 | JD-JD0 | φ0 | Version | Modified | Vol-equiv D | Cmnt |
|---|---|---|---|---|---|---|---|---|---|---|
| # 215 | None | 9.021 | 3°, 30° | 2.44431e6 | 16994.5 | 0.0° | None | 2011-04-11 | 173.0 +/- 17.0 km | 2011-03-28 |
| # 715 | 4.0 | 9.021 | 4°, 29° | 2.44431e6 | 16994.5 | 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] : fabd2f90-d9b0-11f1-43f3-82adffdf9bc7 [observed] Occultation Date + Time : 2026-09-20 at 22:50:57 UT +/- 0.01 min [1] Object Designation : (409) Aspasia Orbit Class : MBA Star Designation : GDR3 4203028818125421824 Star Coordinates (ICRF) : RA = 18 52 42.3683, DE = -10 17 37.119 [2] Star Magnitudes : G = 13.78 mag, RP = 13.12 mag, BP = 14.28 mag Object Magnitude : V = 12.08 mag Estimated Magnitude Drop : 0.2 mag Estimated Max. Duration : 15.0 sec Object Mean Diameter : 161.6 km (src: astorb) Speed of the shadow : 10.8 km/s Elongation to Moon & Sun : 17° (sunlit = 69%), Sun = 105° Cross-track uncertainty : 1.3 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 0.88 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL137 Note : FP:true 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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| Aladin Sky Atlas |
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| Aladin Lite direct link (has Gaia overlay) |