Collaborative Occultation Resources and Archive (CORA)

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

2022-01-08 / TYC 5252-00955-1 / (175) Andromache

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Alvaro Fornas O+ CCD M430 ES NTP+ 19:43:38 19:43:38.01 19:43:41.12 19:43:54 0.10 0.10 3.11 99.8
2 show Joan Aragones O+ CCD L102 ES NTP+ 19:40:03 19:43:43.14 19:43:45.89 19:45:22 0.25 0.26 2.75 88.3
3 show Josep Masalles O+ CCD L80 ES NTP+ 19:42:05 19:43:43.32 19:43:45.82 19:43:55 0.35 0.35 2.50 80.2
4 show Carles Schnabel O+ VID M280 ES GPS++ 19:43:01 19:43:43.68 19:43:45.88 19:44:16 0.04 0.04 2.20 70.6
5 show Jordi Marco O+ CCD M235 ES NTP+ 19:41:34 19:43:44.33 19:43:46.37 19:45:34 0.04 0.04 2.04 65.5
6 show Antoni Selva O- VID M500 ES 19:41:46 19:45:45
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

6 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#74 : c47846b2-a60b-42cf-815a-a7f042a7c991 [db: observed]

Using prediction c47846b2-a60b-42cf-815a-a7f042a7c991 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 = 163 x 61 km
a',b' = 81.3, 30.3 km
X0,Y0 = 956.6, 40.0 km
Mean diameter = 99 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.

Sky projection (artificial light) for occ. time: 2022-01-08, 19:42 UT (JD = 2459588.321)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 47091.08.328 28°, 89° 2.457228e62360.30.0° None2020-10-05 not scaled 2019-10-23
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] : c47846b2-a60b-42cf-815a-a7f042a7c991 [observed]

 Occultation Date + Time   : 2022-01-08 at 19:41:01 UT +/- 0.01 min  [1]
 Object Designation        : (175) Andromache
 Orbit Class               : MBA
 Star Designation          : GDR3 2639987998804621312
 Star Coordinates (ICRF)   : RA = 23 40 08.2735, DE = -02 28 51.013  [2]
 Star Magnitudes           : G = 10.45 mag, RP = 9.93 mag, BP = 10.8 mag
 Object Magnitude          : V = 13.93 mag
 Estimated Magnitude Drop  : 3.5 mag
 Estimated Max. Duration   : 3.1 sec
 Object Mean Diameter      : 101 km  (src: astorb)
 Speed of the shadow       : 32.1 km/s
 Elongation to Moon & Sun  : 14° (sunlit = 41%), Sun = 66°
 Cross-track uncertainty   : 2.7 mas = 5 km = 0.05 path-width (1-sig)
 RUWE and duplicate source : 0.95 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#74

 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)