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2018-02-23 / HIP 22583 / (129) Antigone

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Oscar Canales O+ VID M200 ES GPS++
2 show Olivier Gadal O+ CCD M254 FR NTP 19:16:00 19:31:34.0 19:31:39.8 19:36:00 1.3 1.3 5.80 62.6
3 show P. Andre et al O+ VID M300 FR GPS++ 19:23:00 19:31:33.27 19:31:41.83 19:36:00 0.09 0.02 8.56 92.4
4 show Karel Halir O+ VID M303 CZ GPS++ 19:29:00 19:32:58.47 19:33:10.39 19:36:00 0.08 0.08 11.92 128.7
5 show Michal Rottenborn O+ VID M303 CZ GPS++ 19:31:08 19:33:00.18 19:33:12.26 19:35:08 0.02 0.02 12.08 130.5
6 show Jiri Kubanek O+ VID M203 CZ GPS++ 19:30:55 19:33:01.83 19:33:14.63 19:35:35 0.04 0.04 12.80 138.2
7 show Jiri Polak O+ VID M303 CZ GPS++ 19:31:05 19:33:00.22 19:33:05.82 19:35:51 0.06 0.04 5.60 60.5
8 show Wojciech Burzynski O+ VIS M150 PL GPS++ 19:33:00 19:33:50.0 19:34:02.1 19:35:00 0.3 0.2 12.10 130.7
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

8 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#128 : 571f16c5-6dda-47bf-b806-e12ae1d12894 [db: observed]

Using prediction 571f16c5-6dda-47bf-b806-e12ae1d12894 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 = 147 x 119 km
a',b' = 73.4, 59.6 km
X0,Y0 = 1007.8, 19.5 km
Mean diameter = 132 km

From 7 chords (VID,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: 2018-02-23, 19:30 UT (JD = 2458173.313)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 159None4.957 207°, 58° 2.44110073971e617072.60.0° size from AO is 124+/-12 km2013-07-23 118.0 +/- 19.0 km 2011-03-28
# 18104.04.957 205°, 63° 2.44110073971e617072.60.0° None2017-06-19 126.0 +/- 3.0 km 2017-06-14
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] : 571f16c5-6dda-47bf-b806-e12ae1d12894 [observed]

 Occultation Date + Time   : 2018-02-23 at 19:26:49 UT +/- 0.02 min  [1]
 Object Designation        : (129) Antigone
 Orbit Class               : MBA
 Star Designation          : GDR3 3296171899697312512
 Star Coordinates (ICRF)   : RA = 04 51 36.3647, DE = +12 47 37.987  [2]
 Star Magnitudes           : G = 9.49 mag, RP = 9.01 mag, BP = 9.8 mag
 Object Magnitude          : V = 12.86 mag
 Estimated Magnitude Drop  : 3.4 mag
 Estimated Max. Duration   : 11.6 sec
 Object Mean Diameter      : 125 km  (src: astorb)
 Speed of the shadow       : 10.8 km/s
 Elongation to Moon & Sun  : 5° (sunlit = 55%), Sun = 98°
 Cross-track uncertainty   : 1.7 mas = 3 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 1.12 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#128

 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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