2021-04-16 / 4UC 558-036793 / (103) Hera
# | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
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1 | show | Malcolm Jennings | O+ | VID | M276 | UK | RAD++ | 23:00:00 | 23:05:22.30 | 23:05:24.06 | 23:10:00 | 0.32 | 0.32 | 1.76 | 39.4 |
2 | show | Peter Birtwhistle | O+ | CCD | M405 | UK | NTP | 23:05:12 | 23:05:20.63 | 23:05:24.08 | 23:05:32 | 0.15 | 0.08 | 3.45 | 77.3 |
3 | show | Tim Haymes | O+ | CCD | M300 | UK | GPS++ | 23:04:02 | 23:05:19.88 | 23:05:21.16 | 23:07:02 | 0.15 | 0.08 | 1.28 | 28.7 |
4 | show | Michael OConnell | O+ | VID | M355 | IE | GPS++ | 23:04:15 | 23:05:10.74 | 23:05:14.94 | 23:06:00 | 0.12 | 0.16 | 4.20 | 94.1 |
5 | show | S. Meister et al | O? | CCD | M500 | CH | GPS++ | 23:05:07 | 23:05:35.40 | 23:06:07 | 0.78 |
5 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):JPL#135 : e82bc045-5781-4931-b281-424b4bb46f18 [db: observed] |
Using prediction e82bc045-5781-4931-b281-424b4bb46f18 for map and profile fit
Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: Size = 163 x 80 km a',b' = 81.7, 40.2 km X0,Y0 = -80.8, -3.2 km Mean diameter = 115 km From 4 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: 2021-04-16, 23:04 UT (JD = 2459321.461)
DAMIT | Q | P (h) | λ, β | JD0 | JD-JD0 | φ0 | Version | Modified | Vol-equiv D | Cmnt |
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# 917 | None | 23.743 | 85°, 24° | 2.443658e6 | 15663.5 | 0.0° | None | None | not scaled | 2016-01-04 |
# 918 | None | 23.743 | 270°, 40° | 2.443658e6 | 15663.5 | 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] : e82bc045-5781-4931-b281-424b4bb46f18 [observed] Occultation Date + Time : 2021-04-16 at 23:02:28 UT +/- 0.0 min [1] Object Designation : (103) Hera Orbit Class : MBA Star Designation : GDR3 3367865825968679040 Star Coordinates (ICRF) : RA = 06 58 26.2323, DE = +21 34 21.427 [2] Star Magnitudes : G = 13.44 mag, RP = 12.78 mag, BP = 13.96 mag Object Magnitude : V = 13.46 mag Estimated Magnitude Drop : 0.8 mag Estimated Max. Duration : 4.1 sec Object Mean Diameter : 91 km (src: astorb) Speed of the shadow : 22.4 km/s Elongation to Moon & Sun : 24° (sunlit = 20%), Sun = 76° Cross-track uncertainty : 0.7 mas = 1 km = 0.02 path-width (1-sig) RUWE and duplicate source : 1.0 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#135 [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) |