Collaborative Occultation Resources and Archive (CORA)

Occultations | Observations | Reports | Info + Credits | JOA | Admin | Login

2019-11-30 / 4UC 411-031031 / (105) Artemis

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Gerard Vaudescal O+ VID M305 FR GPS++ 00:02:04 00:03:00.07 00:03:10.79 00:03:57 1.12 1.92 10.72 104.0
2 show Malcolm Jennings O+ VID M276 UK RAD++ 23:56:34 00:01:49.34 00:02:00.06 00:06:00 0.43 0.43 10.72 104.0
3 show Adrian Jones O+ VID M305 UK GPS++ 00:00:05 00:01:49.01 00:02:00.89 00:03:47 0.16 0.12 11.88 115.2
4 show Tim Haymes O+ VID M279 UK GPS++ 23:59:32 00:01:48.02 00:01:59.22 00:03:30 0.36 0.12 11.20 108.6
5 show Simon Kidd O+ CCD M350 UK GPS++ 00:00:00 00:01:43.26 00:01:54.47 00:03:00 0.13 0.12 11.21 108.7
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

5 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#138 : b55d7825-4460-4895-b960-1ffe9cc565c1 [db: observed]

Using prediction b55d7825-4460-4895-b960-1ffe9cc565c1 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 = 122 x 88 km
a',b' = 61.2, 44.2 km
X0,Y0 = 4311.5, 28.9 km
Mean diameter = 104 km

From 5 chords (VID,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.

Map with groundtrack and observer stations

Event Details 
 Occultation UUID [and DB] : b55d7825-4460-4895-b960-1ffe9cc565c1 [observed]

 Occultation Date + Time   : 2019-11-30 at 00:06:43 UT +/- 0.01 min  [1]
 Object Designation        : (105) Artemis
 Orbit Class               : MBA
 Star Designation          : GDR3 3054605071913502208
 Star Coordinates (ICRF)   : RA = 07 26 01.3438, DE = -07 56 33.624  [2]
 Star Magnitudes           : G = 13.43 mag, RP = 13.37 mag, BP = 13.46 mag
 Object Magnitude          : V = 13.42 mag
 Estimated Magnitude Drop  : 0.8 mag
 Estimated Max. Duration   : 12.3 sec
 Object Mean Diameter      : 119 km  (src: astorb)
 Speed of the shadow       : 9.7 km/s
 Elongation to Moon & Sun  : 149° (sunlit = 13%), Sun = 126°
 Cross-track uncertainty   : 1.7 mas = 2 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.0 mas, dup.src = 1  (0:false, 1:true)

 Ephemeris Reference       : JPL#138

 
 [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
(If error 404: link not valid which means no data available)

Aladin Sky Atlas
Aladin Lite direct link (has Gaia overlay)