Collaborative Occultation Resources and Archive (CORA)

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

2013-01-06 / TYC 1856-00745-1 / (87) Sylvia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Vasilis Metallinos O+ VID L130 GR GPS++ 01:32:20 01:36:20.73 01:36:45.33 01:46:00 0.05 0.05 24.60 319.8
2 show L. Brunetto et al O+ VID M406 FR GPS++ 01:32:00 01:37:29.53 01:37:36.65 01:42:00 0.02 0.02 7.12 92.6
3 show E. Frappa/A. Klotz O+ CCD M250 FR GPS++ 01:36:52 01:37:26.6 01:37:39.5 01:38:22 0.1 0.1 12.90 167.7
4 show E. Frappa/A. Klotz O+ CCD M250 FR GPS++ 01:38:37 01:39:00.73 01:39:01.21 01:40:07 0.08 0.08 0.48 6.2
5 show M. Devogele et al O+ VID M1000 FR GPS++ 01:33:30 01:37:26.73 01:37:39.50 01:41:34 0.08 0.08 12.77 166.0
6 show M. Devogele et al O+ VID M1000 FR GPS++ 01:33:30 01:39:00.85 01:39:01.41 01:41:34 0.08 0.08 0.56 7.3
7 show Pierre Dubreuil O+ CCD M203 FR 01:33:13 01:38:57.6 01:38:59.3 01:56:48 2 2 1.70 22.1
8 show Paolo Tanga O+ CCD M356 FR 01:35:07 01:41:11 0.02 0.02
9 show Paolo Tanga O+ CCD M356 FR 01:35:07 01:41:11 0.03 0.03
10 show J. Lecacheux et al O+ VID L130 FR GPS++ 01:29:04 01:37:37.16 01:37:41.22 01:45:00 0.08 0.10 4.06 52.8
11 show Marc Bretton O+ VIS M820 FR RAD 01:00:00 01:37:34.5 01:37:52.6 02:00:00 18.10 235.3
12 show Alain Figer O+ CCD L68 FR PHONE 01:37:00 01:37:22.8 01:37:49.0 01:39:41 0.6 0.8 26.20 340.6
13 show Vincent Fristot O+ CCD L102 FR NTP 01:36:01 01:37:30.7 01:37:52.2 01:40:00 0.2 0.2 21.50 279.5
14 show S. Sposetti/A. Manna O+ VID M200 IT GPS++ 01:34:14 01:37:26.21 01:37:51.55 01:41:11 0.03 0.04 25.34 329.4
15 show Simone Bolzoni O+ VIS M300 IT RAD+ 01:34:00 01:37:29.15 01:37:47.35 01:40:25 0.3 0.2 18.20 236.6
16 show Albino Carbognani O+ CCD M810 IT NTP 01:37:09 01:37:33.3 01:37:51.0 01:38:35 0.28 0.28 17.70 230.1
17 show Hilari Pallares O- VIS M280 ES 01:35:10 01:50:20
18 show Ricard Casas O- VID M200 ES 01:35:58 01:39:01
19 show C. Perello/A. Selva O- VID M500 ES 01:35:09 01:42:47
20 show Joan Lopez O- VID M200 ES 01:36:34 01:39:03
21 show Francois Colas O- CCD M1050 FR 01:15:00 01:50:00
22 show Dominique Albanese O- CCD M280 FR 01:34:56 01:50:46
23 show Raymond Poncy O- CCD M400 FR 01:37:30 01:40:10
24 show J. Lecacheux et al O- VID L61 FR 01:29:17 01:45:04
25 show Daniel Verilhac O- VID M210 FR 01:33:33 01:46:02
26 show Guy Brabant O- VID M200 FR 01:30:00 01:49:00
27 show Eric Frappa O- VID M203 FR 01:34:31 01:43:06
28 show Luc Arnold O- CCD M205 FR 01:37:14 01:39:55
29 show E. Frappa et al O- VID L61 FR 01:36:04 01:42:00
30 show Laurent Bernasconi O- CCD M500 FR 01:36:48 01:40:58
31 show Claude Peguet O- VIS M350 FR 01:33:32 01:45:47
32 show Jean-Louis Penninckx O- VIS M400 FR 01:29:00 01:43:00
33 show U. Quadri et al O- CCD M250 IT 01:37:16 01:38:40
34 show Carlo Gualdoni O- VID M250 IT 01:30:00 01:45:00
35 show Stefano Sposetti O- VID M400 CH 01:37:02 01:38:10
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

35 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#114 : a5eed4e8-7344-49a1-97a6-55844a2b7799 [db: observed]

Using prediction a5eed4e8-7344-49a1-97a6-55844a2b7799 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 = 1968 x 164 km
a',b' = 984.0, 82.1 km
X0,Y0 = -597.4, -32.8 km
Mean diameter = 568 km

From 14 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: 2013-01-06, 01:36 UT (JD = 2456298.567)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 148None5.184 71°, 66° 2.44538690762e610911.70.0° None2013-07-24 258.0 +/- 28.0 km 2007-02-27
# 7194.05.184 72°, 68° 2.44375e612548.60.0° None2017-06-19 277.0 +/- 5.0 km 2017-06-13
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] : a5eed4e8-7344-49a1-97a6-55844a2b7799 [observed]

 Occultation Date + Time   : 2013-01-06 at 01:41:58 UT +/- 0.02 min  [1]
 Object Designation        : (87) Sylvia
 Orbit Class               : MBA
 Star Designation          : GDR3 3442304588532571008
 Star Coordinates (ICRF)   : RA = 05 31 27.2643, DE = +27 29 19.147  [2]
 Star Magnitudes           : G = 10.58 mag, RP = 10.07 mag, BP = 10.91 mag
 Object Magnitude          : V = 12.31 mag
 Estimated Magnitude Drop  : 1.9 mag
 Estimated Max. Duration   : 20.1 sec
 Object Mean Diameter      : 261 km  (src: astorb)
 Speed of the shadow       : 13.0 km/s
 Elongation to Moon & Sun  : 124° (sunlit = 40%), Sun = 157°
 Cross-track uncertainty   : 2.0 mas = 3 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.11 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#114

 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
Aladin Lite direct link (has Gaia overlay)