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2021-01-05 / HIP 25974 / (13) Egeria

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Javier Elias O+1 CCD M203 ES NTP+ 20:30:00 20:39:28.72 20:39:47.12 20:48:00 0.05 0.05 18.40 169.3
2 show Aaron de la Casa O+1 CCD L102 ES NTP 20:38:34 20:38:34.69 20:38:57.83 20:39:37 0.11 0.15 23.14 212.9
3 show Carles Schnabel O+1 VID M280 ES GPS++ 20:33:46 20:38:36.51 20:39:00.51 20:42:57 0.02 0.02 24.00 220.8
4 show Francisco Campos O+1 CCD M200 ES NTP 20:30:05 20:38:59.47 20:46:31 0.50
5 show Jordi Marco O+1 CCD M235 ES NTP 20:37:56 20:38:33.24 20:38:56.92 20:39:46 0.50 0.50 23.68 217.9
6 show C. Perello/A. Selva O+1 VID M500 ES GPS++ 20:36:47 20:38:33.95 20:38:57.43 20:40:45 0.02 0.02 23.48 216.0
7 show Joan Rovira O+1 VID M180 ES GPS++ 20:35:40 20:38:37.66 20:38:55.66 20:42:20 0.02 0.02 18.00 165.6
8 show Javier Elias O+2 CCD M203 ES NTP+ 20:30:00 20:39:29.57 20:39:46.37 20:48:00 0.05 0.05 16.80 154.6
9 show Aaron de la Casa O+2 CCD L102 ES NTP 20:38:34 20:38:34.69 20:38:58.81 20:39:37 0.11 0.20 24.12 221.9
10 show Carles Schnabel O+2 VID M280 ES GPS++ 20:33:46 20:38:35.89 20:38:59.87 20:42:57 0.08 0.02 23.98 220.6
11 show Francisco Campos O+2 CCD M200 ES NTP 20:30:05 20:38:58.84 20:46:31 0.50
12 show Jordi Marco O+2 CCD M235 ES NTP 20:37:56 20:38:32.86 20:38:56.40 20:39:46 0.50 0.50 23.54 216.6
13 show Jorge Juan O+2 VID M406 ES GPS++ 20:33:23 20:38:37.00 20:38:58.91 20:42:01 0.02 0.02 21.91 201.6
14 show C. Perello/A. Selva O+2 VID M500 ES GPS++ 20:36:47 20:38:33.78 20:38:56.47 20:40:45 0.05 0.04 22.69 208.7
15 show Joan Rovira O+2 VID M180 ES GPS++ 20:35:40 20:38:39.56 20:38:54.82 20:42:20 0.04 0.02 15.26 140.4
16 show Wolfgang Beisker O- CCD M270 PT 20:39:00 20:42:00
17 show Hilari Pallares O- VIS M280 ES 20:31:15 20:40:25
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

17 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#117 : 5c2ce5b6-c68d-48ad-b6bc-fe989cdba354 [db: observed]

Using prediction 5c2ce5b6-c68d-48ad-b6bc-fe989cdba354 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 = 260 x 69 km
a',b' = 129.8, 34.3 km
X0,Y0 = -28.4, 65.5 km
Mean diameter = 134 km

From 13 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.

Sky projection (artificial light) for occ. time: 2021-01-05, 20:38 UT (JD = 2459220.360)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 307None7.047 44°, 21° 2.438025e621195.40.0° 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] : 5c2ce5b6-c68d-48ad-b6bc-fe989cdba354 [observed]

 Occultation Date + Time   : 2021-01-05 at 20:34:56 UT +/- 0.01 min  [1]
 Object Designation        : (13) Egeria
 Orbit Class               : MBA
 Star Designation          : GDR3 0195864497411282048
 Star Coordinates (ICRF)   : RA = 05 32 35.4758, DE = +44 21 36.547  [2]
 Star Magnitudes           : G = 7.94 mag, RP = 7.82 mag, BP = 7.95 mag
 Object Magnitude          : V = 10.36 mag
 Estimated Magnitude Drop  : 2.5 mag
 Estimated Max. Duration   : 22.6 sec
 Object Mean Diameter      : 208 km  (src: astorb)
 Speed of the shadow       : 9.2 km/s
 Elongation to Moon & Sun  : 101° (sunlit = 56%), Sun = 151°
 Cross-track uncertainty   : 2.4 mas = 2 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 2.43 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#117

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

Aladin Sky Atlas
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