2025-01-17 / UCAC4 685-050812 / (1838) Ursa
| # | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | show | Javier De Elías | O+ | VID | M203 | ES | GPS | 21:48:05 | 21:50:39.41 | 21:50:42.15 | 21:52:04 | 0.13 | 0.13 | 2.74 | 36.7 |
| 2 | show | Jordi Marco | O+ | CCD | M235 | ES | NTP | 21:48:14 | 21:50:10.09 | 21:50:12.95 | 21:52:12 | 0.13 | 0.13 | 2.86 | 38.3 |
2 observations found in db: sodis
Available (probably) matching predictions (click on the link to switch):| JPL#63 : c01ef570-87a6-11ef-78cd-98b217dbbd13 [db: asteroids] |
Using prediction c01ef570-87a6-11ef-78cd-98b217dbbd13 for map and profile fit
| Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: X0,Y0 = 1134.6, -0.9 km Circular diameter = 41 km From 2 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: 2025-01-17, 21:49 UT (JD = 2460693.409)
| DAMIT | Q | P (h) | λ, β | JD0 | JD-JD0 | φ0 | Version | Modified | Vol-equiv D | Cmnt |
|---|---|---|---|---|---|---|---|---|---|---|
| # 1028 | None | 16.164 | 284°, 29° | 2.449602e6 | 11091.4 | 0.0° | None | None | not scaled | 2016-01-04 |
| # 1029 | None | 16.164 | 42°, 64° | 2.449602e6 | 11091.4 | 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] : c01ef570-87a6-11ef-78cd-98b217dbbd13 [asteroids] Occultation Date + Time : 2025-01-17 at 21:45:43 UT +/- 0.0 min [1] Object Designation : (1838) Ursa Orbit Class : MBA Star Designation : GDR3 0824558168063449856 Star Coordinates (ICRF) : RA = 09 35 21.8305, DE = +46 58 01.807 [2] Star Magnitudes : G = 13.12 mag, RP = 12.61 mag, BP = 13.47 mag Object Magnitude : V = 15.88 mag Estimated Magnitude Drop : 2.8 mag Estimated Max. Duration : 2.6 sec Object Mean Diameter : 35 km (src: astorb) Speed of the shadow : 13.4 km/s Elongation to Moon & Sun : 44° (sunlit = 84%), Sun = 147° Cross-track uncertainty : 0.7 mas = 1 km = 0.03 path-width (1-sig) RUWE and duplicate source : 0.98 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#63 [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) |