Collaborative Occultation Resources and Archive (CORA)


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

2022-06-20 / 4UC 371-172485 / (442) Eichsfeldia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Jiri Kubanek O+ CCD M303 CZ GPS++ 21:25:30 21:27:19.62 21:27:27.71 21:29:32 0.09 0.09 8.09 57.4
2 show O. Schreurs et al O+ VID M406 BE GPS++ 21:27:06 21:28:00.85 21:28:08.17 21:29:17 0.08 0.28 7.32 52.0
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

2 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#68 : 8ead80b3-0faa-40e4-81d5-a25799c21fb3 [db: observed]

Using prediction 8ead80b3-0faa-40e4-81d5-a25799c21fb3 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:
X0,Y0 = 1869.0, 15.4 km
Circular diameter = 67 km

From 2 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: 2022-06-20, 21:26 UT (JD = 2459751.393)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 53821.011.877 325°, 32° 2.457228e62523.40.0° None2020-10-05 not scaled 2019-10-23
# 53831.011.876 137°, 35° 2.457228e62523.40.0° 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] : 8ead80b3-0faa-40e4-81d5-a25799c21fb3 [observed]

 Occultation Date + Time   : 2022-06-20 at 21:24:11 UT +/- 0.03 min  [1]
 Object Designation        : (442) Eichsfeldia
 Orbit Class               : MBA
 Star Designation          : GDR3 4181730689400099456
 Star Coordinates (ICRF)   : RA = 19 40 55.8310, DE = -15 48 13.222  [2]
 Star Magnitudes           : G = 12.3 mag, RP = 11.58 mag, BP = 12.88 mag
 Object Magnitude          : V = 13.05 mag
 Estimated Magnitude Drop  : 1.2 mag
 Estimated Max. Duration   : 9.2 sec
 Object Mean Diameter      : 66 km  (src: astorb)
 Speed of the shadow       : 7.1 km/s
 Elongation to Moon & Sun  : 63° (sunlit = 53%), Sun = 155°
 Cross-track uncertainty   : 1.0 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.86 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#68

 
 [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)