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2023-06-15 / UCAC4 416-085504 / (676) Melitta

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Peter Tickner O+ VID M356 GB GPS 00:37:20 00:39:33.56 00:39:42.12 00:41:45 0.44 0.78 8.56 84.7
2 show Simon Kidd O+ VID M350 GB GPS 00:38:29 00:39:28.44 00:39:34.22 00:40:29 1.04 1.04 5.78 57.2
3 show Tim Haymes O- VID M280 GB GPS 00:38:25 00:41:25
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

3 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#66 : 1d4f7e8a-7812-46bc-b496-8ea0c8ffadaf [db: observed]

Using prediction 1d4f7e8a-7812-46bc-b496-8ea0c8ffadaf 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:
X0,Y0 = 489.3, 18.4 km
Circular diameter = 88 km

From 2 chords (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: 2023-06-15, 00:39 UT (JD = 2460110.527)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 56801.016.741 64°, -74° 2.457324e62786.50.0° None2020-10-05 not scaled 2019-10-23
# 56811.016.741 236°, -26° 2.457324e62786.50.0° 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] : 1d4f7e8a-7812-46bc-b496-8ea0c8ffadaf [observed]

 Occultation Date + Time   : 2023-06-15 at 00:39:28 UT +/- 0.03 min  [1]
 Object Designation        : (676) Melitta
 Orbit Class               : MBA
 Star Designation          : GDR3 4252791576149645440
 Star Coordinates (ICRF)   : RA = 18 41 44.1358, DE = -06 51 30.972  [2]
 Star Magnitudes           : G = 15.3 mag, RP = 14.47 mag, BP = 15.9 mag
 Object Magnitude          : V = 13.93 mag
 Estimated Magnitude Drop  : 0.3 mag
 Estimated Max. Duration   : 8.1 sec
 Object Mean Diameter      : 80 km  (src: astorb)
 Speed of the shadow       : 9.9 km/s
 Elongation to Moon & Sun  : 124° (sunlit = 10%), Sun = 157°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.11 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#66

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

More Data and Informations
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