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2020-03-13 / TYC 1378-00014-1 / (43) Ariadne

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Bengt Rutersten O+ CCD M280 SE NTP 19:55:15 19:56:07.2 19:56:21.3 19:57:51 0.5 0.5 14.10 52.2
2 show James Gage O+ VIS M400 SE NTP 19:30:00 19:56:32.81 19:56:46.89 20:00:00 1 1 14.08 52.1
3 show L. Hermansson et al O+ CCD M406 SE GPS++ 19:55:55 19:56:24.26 19:56:35.69 19:56:55 0.07 0.07 11.43 42.3
4 show Timo Karhula O+ VIS M305 SE
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

4 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#127 (23-01-08) : 5ae0b952-98a4-4c42-8ac0-d56a1854b7f3 [db: observed]

Using prediction 5ae0b952-98a4-4c42-8ac0-d56a1854b7f3 for map and profile fit

Ellipse and circular profile fits to the timings (chords)

 Auto-Fit Result:
Size = 63 x 41 km
a',b' = 31.6, 20.5 km
X0,Y0 = -1646.9, 36.1 km
Mean diameter = 51 km

From 3 chords (VIS,CCD)








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: 2020-03-13, 19:56 UT (JD = 2458922.326)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 132None5.762 253°, -15° 2.43888223328e620040.10.0° None2010-04-15 not scaled 2007-02-27
# 18254.05.762 251°, -10° 2.43888223328e620040.10.0° None2017-06-19 60.0 +/- 4.0 km 2017-06-07
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] : 5ae0b952-98a4-4c42-8ac0-d56a1854b7f3 [observed]

 Occultation Date + Time   : 2020-03-13 at 19:49:15 UT +/- 0.08 min  [1]
 Object Designation        : (43) Ariadne
 Star Designation          : GDR3 0652374818955091840
 Star Coordinates (ICRF)   : RA = 08 21 27.4663, DE = +15 06 32.016  [2]
 Star Magnitudes           : G = 9.92 mag, RP = 9.16 mag, BP = 10.56 mag
 Object Magnitude          : V = 12.09 mag
 Estimated Magnitude Drop  : 2.3 mag
 Estimated Max. Duration   : 17.7 sec
 Object Mean Diameter      : 66 km  (src: astorb+H10)
 Speed of the shadow       : 3.7 km/s
 Elongation to Moon & Sun  : 107° (sunlit = 77%), Sun = 130°
 Cross-track uncertainty   : 4.7 mas = 5 km = 0.09 path-width (1-sig)
 RUWE and duplicate source : 1.35 mas, dup.src = 1  (0:false, 1:true)

 Ephemeris Reference       : JPL#127 (23-01-08)

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

More Data and Informations
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