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2017-09-24 / TYC 1313-01143-1 / (56) Melete

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Henk De Groot O+ VID M356 NL GPS++ 03:03:26 03:06:04.94 03:06:13.88 03:08:27 0.02 0.02 8.94 123.4
2 show Jan-Maarten Winkel O+ VID M310 NL GPS++ 03:05:13 03:06:07.00 03:06:15.60 03:07:13 0.05 0.05 8.60 118.7
3 show Roland Boninsegna O- VID M406 BE 03:02:44 03:10:28
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: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#134 : 33322f2f-8711-4a33-b462-2051ef4962a5 [db: observed]

Using prediction 33322f2f-8711-4a33-b462-2051ef4962a5 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 = -982.4, 21.4 km
Circular diameter = 122 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: 2017-09-24, 03:06 UT (JD = 2458020.629)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 1105None18.148 103°, -27° 2.443659e614361.60.0° NoneNone not scaled 2016-01-04
# 1106None18.148 282°, -5° 2.443659e614361.60.0° NoneNone not scaled 2016-01-04
# 18513.518.148 103°, -28° 2.443659e614361.60.0° None2017-09-21 116.0 +/- 5.0 km 2017-09-21
# 18523.518.148 283°, -1° 2.443659e614361.60.0° None2017-09-21 116.0 +/- 5.0 km 2017-09-21
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] : 33322f2f-8711-4a33-b462-2051ef4962a5 [observed]

 Occultation Date + Time   : 2017-09-24 at 03:10:17 UT +/- 0.01 min  [1]
 Object Designation        : (56) Melete
 Orbit Class               : MBA
 Star Designation          : GDR3 3348704499391793152
 Star Coordinates (ICRF)   : RA = 06 02 17.1513, DE = +16 09 28.536  [2]
 Star Magnitudes           : G = 10.96 mag, RP = 10.67 mag, BP = 11.12 mag
 Object Magnitude          : V = 14.09 mag
 Estimated Magnitude Drop  : 3.2 mag
 Estimated Max. Duration   : 8.2 sec
 Object Mean Diameter      : 113 km  (src: astorb)
 Speed of the shadow       : 13.8 km/s
 Elongation to Moon & Sun  : 137° (sunlit = 15%), Sun = 91°
 Cross-track uncertainty   : 1.3 mas = 2 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.02 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#134

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

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