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2023-06-09 / UCAC4 416-092139 / (676) Melitta

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Wojciech Burzynski O+ VID M250 PL GPS 23:54:52 23:55:57.088 23:56:02.089 23:56:32 0.335 0.335 5.00 44.5
2 show Konrad Guhl O+ CCD M306 DE GPS 23:56:00 23:57:09.3 23:57:18.4 23:58:30 0.6 0.4 9.10 81.0
3 show Alex Pratt O+ VID M280 GB GPS 23:58:05 23:58:48.31 23:58:57.97 23:59:35 0.34 0.34 9.66 86.0
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 : 3cf36618-954e-4548-9be4-584d953b7479 [db: observed]
JPL#66 : 1af365b1-e842-4556-b4da-cd7bbfe99b8e [db: observed]
JPL#73 : 31850960-c335-11ef-5276-1e73dc7f8714 [db: observed]
JPL#73 : 31857e90-c335-11ef-5276-d0ea67b7de19 [db: observed]
JPL#73 : a9789630-c335-11ef-5276-f8517efd1ebe [db: observed]
JPL#73 : a9790b60-c335-11ef-5276-90c185bf6f39 [db: observed]
JPL#73 : d95d7b40-c335-11ef-5276-eef2ffff67fc [db: observed]
JPL#73 : d95dc960-c335-11ef-5276-26dbc7f74de5 [db: observed]

Using prediction 3cf36618-954e-4548-9be4-584d953b7479 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 = 93 x 48 km
a',b' = 46.4, 24.2 km
X0,Y0 = 127.6, 15.4 km
Mean diameter = 67 km

From 3 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: 2023-06-09, 23:55 UT (JD = 2460105.497)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 56801.016.741 64°, -74° 2.457324e62781.50.0° None2020-10-05 not scaled 2019-10-23
# 56811.016.741 236°, -26° 2.457324e62781.50.0° 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] : 3cf36618-954e-4548-9be4-584d953b7479 [observed]

 Occultation Date + Time   : 2023-06-09 at 23:56:08 UT +/- 0.03 min  [1]
 Object Designation        : (676) Melitta
 Orbit Class               : MBA
 Star Designation          : GDR3 4253114179735058432
 Star Coordinates (ICRF)   : RA = 18 45 02.7739, DE = -06 48 40.895  [2]
 Star Magnitudes           : G = 14.27 mag, RP = 13.87 mag, BP = 14.51 mag
 Object Magnitude          : V = 14.02 mag
 Estimated Magnitude Drop  : 0.6 mag
 Estimated Max. Duration   : 9.0 sec
 Object Mean Diameter      : 80.0 km  (src: astorb)
 Speed of the shadow       : 8.9 km/s
 Elongation to Moon & Sun  : 59° (sunlit = 60%), Sun = 152°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 0.91 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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