2021-01-29 / HIP 7732 / (424) Gratia
# | OBS | Observer | Occ | Meth. | Instr. | CC | TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
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1 | show | Matthieu Conjat | O+ | CCD | M400 | FR | NTP | 21:03:38 | 21:03:58.25 | 21:04:00.44 | 21:04:46 | 0.25 | 0.25 | 2.19 | 57.2 |
2 | show | Paolo Tanga | O+ | CCD | M355 | FR | GPS++ | 21:03:00 | 21:03:58.04 | 21:04:00.15 | 21:05:00 | 0.01 | 0.01 | 2.11 | 55.1 |
3 | show | Pietro Baruffetti | O+ | VID | M300 | IT | GPS++ | 21:02:38 | 21:04:00.92 | 21:04:03.24 | 21:05:39 | 0.08 | 0.08 | 2.32 | 60.6 |
3 observations found in db: euraster
Available (probably) matching predictions (click on the link to switch):JPL#85 : 0fb78b9c-b8bc-478e-b0e9-59bb24af2f03 [db: observed] |
Using prediction 0fb78b9c-b8bc-478e-b0e9-59bb24af2f03 for map and profile fit
Ellipse and circular profile fits to the timings (chords) |
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Auto-Fit Result: Size = 65 x 14 km a',b' = 32.5, 6.8 km X0,Y0 = 791.7, 30.4 km Mean diameter = 30 km From 3 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: 2021-01-29, 21:03 UT (JD = 2459244.377)
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 | 2017.4 | 0.0° | None | 2020-10-05 | not scaled | 2019-10-23 |
# 5354 | 1.0 | 20.060 | 172°, -6° | 2.457227e6 | 2017.4 | 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] : 0fb78b9c-b8bc-478e-b0e9-59bb24af2f03 [observed] Occultation Date + Time : 2021-01-29 at 21:00:14 UT +/- 0.01 min [1] Object Designation : (424) Gratia Orbit Class : MBA Star Designation : GDR3 2560633083531976064 Star Coordinates (ICRF) : RA = 01 39 34.0014, DE = +03 33 02.366 [2] Star Magnitudes : G = 8.57 mag, RP = 8.14 mag, BP = 8.84 mag Object Magnitude : V = 14.86 mag Estimated Magnitude Drop : 6.3 mag Estimated Max. Duration : 3.3 sec Object Mean Diameter : 87 km (src: astorb) Speed of the shadow : 26.1 km/s Elongation to Moon & Sun : 120° (sunlit = 99%), Sun = 74° Cross-track uncertainty : 2.0 mas = 3 km = 0.04 path-width (1-sig) RUWE and duplicate source : 1.68 mas, dup.src = 1 (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) |