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2016-12-30 / 2UC 27466644 / (754) Malabar

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Eric Frappa O+ VID M203 FR GPS++ 05:07:36 05:09:36.27 05:09:46.49 05:11:45 0.05 0.05 10.22 91.0
2 show Alberto Ossola O+ VID M230 CH GPS++ 05:07:58 05:09:11.83 05:09:20.79 05:10:08 0.32 0.32 8.96 79.7
3 show Stefano Sposetti O+ VID M200 CH GPS++ 05:05:10 05:09:12.41 05:09:22.49 05:12:30 0.32 0.16 10.08 89.7
4 show Andrea Manna O+ VID M200 CH GPS++ 05:06:23 05:09:12.16 05:09:22.08 05:11:20 0.16 0.16 9.92 88.3
5 show John Moore O- VID M203 US 05:18:00 05:26:00
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

5 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#122 : ab4bdc0e-5f4c-424f-9284-766f054449aa [db: observed]

Using prediction ab4bdc0e-5f4c-424f-9284-766f054449aa 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 = 97 x 41 km
a',b' = 48.5, 20.5 km
X0,Y0 = 261.1, 5.9 km
Mean diameter = 63 km

From 4 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: 2016-12-30, 05:09 UT (JD = 2457752.715)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 57331.011.737 334°, -38° 2.457251e6501.70.0° 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] : ab4bdc0e-5f4c-424f-9284-766f054449aa [observed]

 Occultation Date + Time   : 2016-12-30 at 05:16:55 UT +/- 0.0 min  [1]
 Object Designation        : (754) Malabar
 Orbit Class               : MBA
 Star Designation          : GDR3 5727055047714748288
 Star Coordinates (ICRF)   : RA = 08 22 49.1071, DE = -12 17 23.513  [2]
 Star Magnitudes           : G = 11.93 mag, RP = 11.21 mag, BP = 12.52 mag
 Object Magnitude          : V = 13.95 mag
 Estimated Magnitude Drop  : 2.2 mag
 Estimated Max. Duration   : 9.9 sec
 Object Mean Diameter      : 88 km  (src: astorb)
 Speed of the shadow       : 8.9 km/s
 Elongation to Moon & Sun  : 146° (sunlit = 1%), Sun = 136°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 0.95 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#122

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

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