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2021-10-08 / 4UC 550-033329 / (1039) Sonneberga

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Jordi Marco O+ CCD M235 ES NTP 04:10:10 04:12:32.29 04:12:33.04 04:14:28 0.15 0.15 0.75 11.0
2 show Antoni Selva O+ VID M500 ES GPS++ 04:10:35 04:12:30.96 04:12:33.26 04:14:33 0.02 0.02 2.30 33.8
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#62 : 2cf53e13-0177-4ae5-ad1b-58af95ffb448 [db: observed]

Using prediction 2cf53e13-0177-4ae5-ad1b-58af95ffb448 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 = -508.7, 24.1 km
Circular diameter = 33 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: 2021-10-08, 04:12 UT (JD = 2459495.675)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 25951.534.967 17°, 51° 2.45103e68465.70.0° None2018-07-19 not scaled 2018-07-18
# 25961.534.967 192°, 51° 2.45103e68465.70.0° None2018-07-19 not scaled 2018-07-18
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] : 2cf53e13-0177-4ae5-ad1b-58af95ffb448 [observed]

 Occultation Date + Time   : 2021-10-08 at 04:14:59 UT +/- 0.01 min  [1]
 Object Designation        : (1039) Sonneberga
 Orbit Class               : MBA
 Star Designation          : GDR3 3365728031767277056
 Star Coordinates (ICRF)   : RA = 06 46 58.0511, DE = +19 54 08.793  [2]
 Star Magnitudes           : G = 12.27 mag, RP = 11.87 mag, BP = 12.5 mag
 Object Magnitude          : V = 16.88 mag
 Estimated Magnitude Drop  : 4.6 mag
 Estimated Max. Duration   : 2.5 sec
 Object Mean Diameter      : 37 km  (src: astorb)
 Speed of the shadow       : 14.7 km/s
 Elongation to Moon & Sun  : 117° (sunlit = 4%), Sun = 94°
 Cross-track uncertainty   : 0.9 mas = 1 km = 0.04 path-width (1-sig)
 RUWE and duplicate source : 5.58 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#62

 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
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