2022-02-23 / 4UC 553-019591 / (4213) Njord
# | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
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1 | show | Michal Rottenborn | O+ | CCD | M254 | CZ | GPS++ | 18:41:39 | 18:43:32.69 | 18:43:34.03 | 18:45:39 | 0.06 | 0.06 | 1.34 | 9.0 |
2 | show | Jiri Kubanek | O+ | CCD | M303 | CZ | GPS++ | 18:41:44 | 18:43:37.73 | 18:43:38.19 | 18:45:53 | 0.05 | 0.05 | 0.46 | 3.1 |
3 | show | Karel Halir | O- | VID | M507 | CZ | 18:41:42 | 18:45:42 | |||||||
4 | show | Michal Rottenborn | O? | CCD | M254 | CZ | GPS++ | 18:41:39 | 18:43:30.39 | 18:43:30.69 | 18:45:39 | 0.09 | 0.09 | 0.30 | 2.0 |
4 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):JPL#54 : f55837f6-45cc-4c61-a825-71f07e063cb1 [db: observed] |
Using prediction f55837f6-45cc-4c61-a825-71f07e063cb1 for map and profile fit
Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: Ellipse profile fit was not successful. Trying circular fit. Circular profile fit was not successful ... 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 |
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Event Details |
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Occultation UUID [and DB] : f55837f6-45cc-4c61-a825-71f07e063cb1 [observed] Occultation Date + Time : 2022-02-23 at 18:43:31 UT +/- 0.04 min [1] Object Designation : (4213) Njord Orbit Class : MBA Star Designation : GDR3 3399820382650621824 Star Coordinates (ICRF) : RA = 05 51 06.9840, DE = +20 29 33.494 [2] Star Magnitudes : G = 13.64 mag, RP = 13.14 mag, BP = 13.97 mag Object Magnitude : V = 17.72 mag Estimated Magnitude Drop : 4.1 mag Estimated Max. Duration : 0.9 sec Object Mean Diameter : 6 km (src: astorb) Speed of the shadow : 6.7 km/s Elongation to Moon & Sun : 155° (sunlit = 52%), Sun = 113° Cross-track uncertainty : 1.3 mas = 1 km = 0.26 path-width (1-sig) RUWE and duplicate source : 0.99 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#54 [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) |