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2021-01-09 / 4UC 408-004329 / (386) Siegena

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Malcolm Jennings O+ VID M276 UK RAD++ 20:40:00 20:45:07.84 20:45:17.18 20:50:00 0.16 0.32 9.34 87.8
2 show Philip Denyer O+ VID M235 UK GPS++ 20:43:37 20:45:06.36 20:45:20.42 20:47:05 0.16 0.06 14.06 132.2
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

2 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#126 : 5bef3dbc-0ae4-4f4f-bc45-56b6d23ba870 [db: observed]

Using prediction 5bef3dbc-0ae4-4f4f-bc45-56b6d23ba870 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 = 866.0, 7.7 km
Circular diameter = 271 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: 2021-01-09, 20:45 UT (JD = 2459224.365)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 447None9.765 289°, 25° 2.444019e615205.40.0° NoneNone not scaled 2012-07-30
# 18154.09.765 287°, 25° 2.444019e615205.40.0° None2017-06-19 168.0 +/- 5.0 km 2017-06-19
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] : 5bef3dbc-0ae4-4f4f-bc45-56b6d23ba870 [observed]

 Occultation Date + Time   : 2021-01-09 at 20:35:38 UT +/- 0.05 min  [1]
 Object Designation        : (386) Siegena
 Orbit Class               : MBA
 Star Designation          : GDR3 5168063061273878528
 Star Coordinates (ICRF)   : RA = 03 26 21.6709, DE = -08 28 34.609  [2]
 Star Magnitudes           : G = 12.71 mag, RP = 12.19 mag, BP = 13.06 mag
 Object Magnitude          : V = 12.22 mag
 Estimated Magnitude Drop  : 0.5 mag
 Estimated Max. Duration   : 17.5 sec
 Object Mean Diameter      : 165 km  (src: astorb)
 Speed of the shadow       : 9.4 km/s
 Elongation to Moon & Sun  : 149° (sunlit = 14%), Sun = 114°
 Cross-track uncertainty   : 1.3 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.21 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#126

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

More Data and Informations
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