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2020-02-25 / 4UC 528-008062 / (119) Althaea

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show C. Perello/A. Selva O+ VID M500 ES GPS++ 19:06:26 19:08:13.14 19:08:17.66 19:10:24 0.08 0.04 4.52 86.3
2 show Joan Rovira O+ VID M180 ES GPS++ 19:05:10 19:08:14.87 19:08:17.39 19:12:00 0.12 0.08 2.52 48.1
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#105 : b9f567c2-d202-4c66-a408-1b577b95973a [db: observed]

Using prediction b9f567c2-d202-4c66-a408-1b577b95973a 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 = 530.6, 9.8 km
Circular diameter = 89 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: 2020-02-25, 19:07 UT (JD = 2458905.297)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 323None11.465 339°, -67° 2.445831e613074.30.0° None2011-05-02 not scaled 2011-04-21
# 324None11.465 181°, -61° 2.445831e613074.30.0° None2011-05-02 not scaled 2011-04-21
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] : b9f567c2-d202-4c66-a408-1b577b95973a [observed]

 Occultation Date + Time   : 2020-02-25 at 19:06:11 UT +/- 0.01 min  [1]
 Object Designation        : (119) Althaea
 Orbit Class               : MBA
 Star Designation          : GDR3 0045191959422331904
 Star Coordinates (ICRF)   : RA = 04 10 34.4173, DE = +15 26 57.495  [2]
 Star Magnitudes           : G = 12.73 mag, RP = 12.07 mag, BP = 13.23 mag
 Object Magnitude          : V = 13.36 mag
 Estimated Magnitude Drop  : 1.1 mag
 Estimated Max. Duration   : 3.0 sec
 Object Mean Diameter      : 57 km  (src: astorb)
 Speed of the shadow       : 19.1 km/s
 Elongation to Moon & Sun  : 63° (sunlit = 4%), Sun = 87°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 0.9 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#105

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

More Data and Informations
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