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2008-01-17 / TYC 1307-00201-1 / (76) Freia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Oscar Canales O+ VID M200 ES GPS++ 02:11:39 02:13:29.60 02:13:45.27 02:14:51 0.06 0.06 15.67 123.8
2 show Jose-Luis Marco O+ VID M200 ES GPS++ 02:12:20 02:13:29.62 02:13:44.42 02:15:00 14.80 116.9
3 show Jerry Oltion O+ VIS M254 US RAD 02:29:25 02:30:28 02:30:43 02:31:10 1 1 15.00 118.5
4 show Steve Preston O+ VID M200 US GPS++ 02:25:00 02:30:16.91 02:30:30.47 0.05 0.05 13.56 107.1
5 show Chad Ellington O+ VID M250 US RAD++ 02:25:00 02:30:18.88 02:30:35.88 02:35:00 0.03 0.03 17.00 134.3
6 show E. Frappa/A. Klotz O- CCD M250 FR 02:12:49 02:15:56
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

6 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#78 : 717fa28e-7b4f-4fee-9044-b69f1ac7cf54 [db: observed]

Using prediction 717fa28e-7b4f-4fee-9044-b69f1ac7cf54 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 = 214 x 143 km
a',b' = 107.2, 71.4 km
X0,Y0 = -70.3, 22.2 km
Mean diameter = 175 km

From 5 chords (VID,VIS)








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: 2008-01-17, 02:13 UT (JD = 2454482.592)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 442None9.973 140°, 14° 2.44485e69632.60.0° NoneNone not scaled 2012-07-30
# 443None9.973 320°, 17° 2.44485e69632.60.0° NoneNone not scaled 2012-07-30
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] : 717fa28e-7b4f-4fee-9044-b69f1ac7cf54 [observed]

 Occultation Date + Time   : 2008-01-17 at 02:22:18 UT +/- 0.03 min  [1]
 Object Designation        : (76) Freia
 Orbit Class               : MBA
 Star Designation          : GDR3 3399775405754199296
 Star Coordinates (ICRF)   : RA = 05 49 11.0253, DE = +20 28 10.314  [2]
 Star Magnitudes           : G = 10.41 mag, RP = 10.34 mag, BP = 10.43 mag
 Object Magnitude          : V = 12.46 mag
 Estimated Magnitude Drop  : 2.2 mag
 Estimated Max. Duration   : 23.3 sec
 Object Mean Diameter      : 184 km  (src: astorb)
 Speed of the shadow       : 7.9 km/s
 Elongation to Moon & Sun  : 45° (sunlit = 65%), Sun = 151°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.08 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#78

 Object is a Gaia mass determination target !

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

More Data and Informations
SiMDA | 3D Asteroid Catalogue | Johnston Archive | Star at CDS (Vizier) | JPL Small-Body Node | Minor Planet Center | Wikipedia
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