2022-03-05 / 4UC 571-046898 / (424) Gratia
# | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
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1 | show | Martin Gutekunst | O+ | CCD | L280 | DE | NTP | 23:23:00 | 23:24:03.43 | 23:24:09.61 | 23:25:59 | 0.38 | 0.56 | 6.18 | 54.4 |
2 | show | Gregor Krannich | O+ | CCD | M350 | DE | GPS++ | 23:22:51 | 23:24:08.20 | 23:24:14.62 | 23:25:21 | 0.11 | 0.11 | 6.42 | 56.5 |
3 | show | R. Boninsegna et al | O+ | VID | M400 | BE | GPS++ | 23:23:31 | 23:25:03.63 | 23:25:09.51 | 23:26:30 | 0.08 | 0.28 | 5.88 | 51.7 |
4 | show | Jean Bourgeois | O+ | VID | M200 | BE | GPS++ | 23:24:45 | 23:25:00.77 | 23:25:07.01 | 23:25:45 | 0.16 | 0.08 | 6.24 | 54.9 |
5 | show | Karl-Ludwig Bath | O- | CCD | M180 | DE | 23:22:02 | 23:27:02 | |||||||
6 | show | Olivier Schreurs | O- | VID | M254 | BE | 23:23:52 | 23:26:02 |
6 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):JPL#85 : 502d0799-13cc-4fff-b845-ee3be5318053 [db: observed] |
Using prediction 502d0799-13cc-4fff-b845-ee3be5318053 for map and profile fit
Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: Size = 112 x 54 km a',b' = 56.2, 26.9 km X0,Y0 = -1052.1, 30.6 km Mean diameter = 78 km From 4 chords (CCD,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: 2022-03-05, 23:23 UT (JD = 2459644.474)
DAMIT | Q | P (h) | λ, β | JD0 | JD-JD0 | φ0 | Version | Modified | Vol-equiv D | Cmnt |
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# 5353 | 1.0 | 20.060 | 351°, -24° | 2.457227e6 | 2417.5 | 0.0° | None | 2020-10-05 | not scaled | 2019-10-23 |
# 5354 | 1.0 | 20.060 | 172°, -6° | 2.457227e6 | 2417.5 | 0.0° | None | 2020-10-05 | not scaled | 2019-10-23 |
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] : 502d0799-13cc-4fff-b845-ee3be5318053 [observed] Occultation Date + Time : 2022-03-05 at 23:25:05 UT +/- 0.02 min [1] Object Designation : (424) Gratia Orbit Class : MBA Star Designation : GDR3 0644686277735901312 Star Coordinates (ICRF) : RA = 09 39 47.1478, DE = +24 07 33.371 [2] Star Magnitudes : G = 14.37 mag, RP = 13.91 mag, BP = 14.66 mag Object Magnitude : V = 13.73 mag Estimated Magnitude Drop : 0.5 mag Estimated Max. Duration : 9.9 sec Object Mean Diameter : 87 km (src: astorb) Speed of the shadow : 8.8 km/s Elongation to Moon & Sun : 114° (sunlit = 12%), Sun = 152° Cross-track uncertainty : 2.0 mas = 2 km = 0.03 path-width (1-sig) RUWE and duplicate source : 1.06 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#85 [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) |