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2020-04-11 / 4UC 541-054062 / (667) Denise

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Pietro Baruffetti O+ VID M300 IT GPS++ 03:04:20 03:05:21.07 03:05:27.77 03:06:52 0.08 0.08 6.70 97.2
2 show Michele Bigi O+ VID M200 IT GPS++ 03:03:50 03:05:21.16 03:05:27.88 03:06:50 0.16 0.16 6.72 97.4
3 show Alberto Ossola O+ VID M230 CH GPS++ 03:03:59 03:05:37.53 03:05:43.77 03:07:01 0.16 0.16 6.24 90.5
4 show Andrea Manna O+ VID M200 CH GPS++ 03:02:08 03:05:39.22 03:05:44.90 03:07:34 0.08 0.08 5.68 82.4
5 show Stefano Sposetti O+ VID M280 CH GPS++ 03:02:30 03:05:39.59 03:05:44.64 03:08:30 0.05 0.05 5.05 73.2
6 show Andreas Schweizer O+ CCD L107 CH GPS 03:05:22 03:05:49.29 03:05:52.29 03:06:09 0.38 0.38 3.00 43.5
7 show F. Van Den Abbeel O+ VID M200 BE GPS++ 03:05:15 03:06:12.54 03:06:19.10 03:07:15 0.80 0.32 6.56 95.1
8 show Jean Bourgeois O+ VID M356 BE GPS++ 03:05:00 03:06:14.36 03:06:19.00 03:16:00 0.48 0.48 4.64 67.3
9 show Olivier Schreurs O+ VID M280 BE GPS++ 03:05:11 03:06:16.53 03:06:22.93 03:07:20 0.08 0.08 6.40 92.8
10 show Chad Ellington O+ VID M250 DE GPS++ 03:05:10 03:06:20.01 03:06:23.28 03:07:19 0.12 0.12 3.27 47.4
11 show Stefan Meister O- CCD M500 CH 03:05:18 03:06:18
12 show Roland Boninsegna O- VID M400 BE 03:04:22 03:08:14
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

12 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#65 : edce3c37-56c3-415d-beb9-4f21311e79aa [db: observed]

Using prediction edce3c37-56c3-415d-beb9-4f21311e79aa for map and profile fit

Get observations as KML file (reduced site location resolution)

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result:
Size = 98 x 80 km
a',b' = 49.2, 39.8 km
X0,Y0 = -2972.9, 19.4 km
Mean diameter = 89 km

From 10 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: 2020-04-11, 03:05 UT (JD = 2458950.628)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 56661.012.685 40°, -86° 2.45723e61720.60.0° None2020-10-05 not scaled 2019-10-23
Q: model quality flag (0-5, 5=highest) | P: rotation period | λ,β: ecl. lon. and lat. of spin axis (J2000) | JD: initial time (epoch) | φ0: initial rotation angle for JD0

 
Image size: 300px. Transparent image background for copy & paste

Map with groundtrack and observer stations

Event Details
 Occultation UUID [and DB] : edce3c37-56c3-415d-beb9-4f21311e79aa [observed]

 Occultation Date + Time   : 2020-04-11 at 03:06:15 UT +/- 0.02 min  [1]
 Object Designation        : (667) Denise
 Orbit Class               : MBA
 Star Designation          : GDR3 1247713739227798528
 Star Coordinates (ICRF)   : RA = 13 42 09.7335, DE = +18 01 38.671  [2]
 Star Magnitudes           : G = 13.04 mag, RP = 12.58 mag, BP = 13.34 mag
 Object Magnitude          : V = 14.3 mag
 Estimated Magnitude Drop  : 1.6 mag
 Estimated Max. Duration   : 5.6 sec
 Object Mean Diameter      : 81 km  (src: astorb)
 Speed of the shadow       : 14.5 km/s
 Elongation to Moon & Sun  : 51° (sunlit = 87%), Sun = 153°
 Cross-track uncertainty   : 1.3 mas = 2 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 1.22 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#65

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

More Data and Informations
SiMDA | 3D Asteroid Catalogue | Johnston Archive | Star at CDS (Vizier) | JPL Small-Body Node | Minor Planet Center | Wikipedia
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