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2021-02-20 / TYC 0730-02054-1 / (313) Chaldaea

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Michel Boutet O+ VID M300 FR GPS++ 22:35:26 22:39:32.52 22:39:43.08 22:42:56 0.08 0.08 10.56 83.4
2 show Pascal Andre O+ VID M200 FR GPS++ 22:37:05 22:39:34.77 22:39:45.67 22:40:12 0.40 0.16 10.90 86.1
3 show Michel de la Huerta O+ CCD V112 FR NTP 22:37:02 22:39:31.33 22:39:42.00 22:42:00 3.09 3.09 10.67 84.3
4 show J.C. Lachurie O+ VID M200 FR GPS++ 22:38:00 22:39:34.94 22:39:45.82 22:40:33 0.32 0.32 10.88 86.0
5 show Jean Barthel O+ CCD V112 FR NTP 22:37:01 22:39:33.80 22:39:44.11 22:42:00 0.13 0.13 10.31 81.4
6 show Guy Brabant O+ VID M203 FR GPS++ 22:40:04.13 22:40:09.81 0.04 0.04 5.68 44.9
7 show Robert Savonnet O+ CCD V112 FR NTP 22:37:02 22:40:09.37 22:40:20.40 22:41:59 0.11 0.11 11.03 87.1
8 show Paul Lecoq O+ CCD V112 FR NTP 22:37:04 22:40:15.65 22:40:18.64 22:44:02 0.64 0.64 2.99 23.6
9 show Andrea Pontalto O+ CCD V112 FR NTP 22:37:02 22:40:17.65 22:40:26.26 22:42:00 0.07 0.07 8.61 68.0
10 show Marc Meylan O+ CCD V112 FR NTP 22:37:02 22:40:19.08 22:40:23.34 22:42:00 0.10 0.10 4.26 33.7
11 show Andreas Schweizer O+ CCD L107 CH GPS++ 22:40:05 22:40:32.61 22:40:34.61 22:40:36 0.04 0.04 2.00 15.8
12 show Jean-Francois Pittet O+ CCD M254 DE GPS++ 22:35:30 22:40:47.18 22:40:55.31 22:45:30 0.13 0.13 8.13 64.2
13 show Gregor Krannich O+ CCD M350 DE GPS++ 22:39:46 22:40:43.55 22:40:52.03 22:41:56 0.01 0.01 8.48 67.0
14 show Bernd Gaehrken O+ VID M800 DE RAD+ 22:39:27 22:40:46.54 22:40:57.56 22:42:10 0.04 0.04 11.02 87.1
15 show Jiri Kubanek O+ CCD M150 CZ GPS++ 22:39:05 22:40:58.84 22:41:09.15 22:43:04 0.10 0.10 10.31 81.4
16 show Michal Rottenborn O+ CCD M254 CZ GPS++ 22:39:05 22:41:00.03 22:41:05.74 22:43:05 0.02 0.02 5.71 45.1
17 show Marcin Filipek O+ CCD M250 PL GPS++ 22:39:30 22:41:30.36 22:41:33.61 22:42:00 0.05 0.02 3.25 25.7
18 show Jordi Marco O- CCD M235 ES 22:36:02 22:41:00
19 show Daniel Verilhac O- CCD M200 FR 22:39:30 22:41:10
20 show Stefan Meister O- CCD M500 CH 22:40:05 22:41:05
21 show Thomas Baumann O- CCD V112 CH 22:37:03 22:41:59
22 show Bjoern Kattentidt O- VID M279 DE 22:38:58 22:43:39
23 show Jiri Polak O- CCD M303 CZ 22:39:04 22:43:04
24 show Daniel Blazewicz O- CCD M350 PL 22:38:46 22:45:00
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

24 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#117 : ff1f6ed3-1371-4102-bb7d-8ba46325bc2a [db: observed]
JPL#117 : a08023a8-cc57-441a-81de-7d795bbc9dea [db: observed]

Using prediction ff1f6ed3-1371-4102-bb7d-8ba46325bc2a 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 = 91 x 83 km
a',b' = 45.5, 41.4 km
X0,Y0 = -118.4, 22.4 km
Mean diameter = 87 km

From 17 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: 2021-02-20, 22:38 UT (JD = 2459266.443)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 1223None8.390 218°, 29° 2.443125e616141.40.0° NoneNone not scaled 2016-01-04
# 1224None8.390 44°, 11° 2.443125e616141.40.0° NoneNone not scaled 2016-01-04
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] : ff1f6ed3-1371-4102-bb7d-8ba46325bc2a [observed]

 Occultation Date + Time   : 2021-02-20 at 22:29:34 UT +/- 0.02 min  [1]
 Object Designation        : (313) Chaldaea
 Orbit Class               : MBA
 Star Designation          : GDR3 3328312239489045632
 Star Coordinates (ICRF)   : RA = 06 15 01.9727, DE = +08 03 50.416  [2]
 Star Magnitudes           : G = 10.42 mag, RP = 9.74 mag, BP = 10.94 mag
 Object Magnitude          : V = 12.34 mag
 Estimated Magnitude Drop  : 2.1 mag
 Estimated Max. Duration   : 12.2 sec
 Object Mean Diameter      : 96 km  (src: astorb)
 Speed of the shadow       : 7.9 km/s
 Elongation to Moon & Sun  : 24° (sunlit = 61%), Sun = 120°
 Cross-track uncertainty   : 0.7 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.05 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#117

 
 [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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