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2024-09-06 / UCAC4 562-007696 / (395) Delia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Peter Delincak O+ VID M400 SK NTP 01:28:02 01:29:58.146 01:30:06.233 01:32:12 0.004 0.004 8.09 61.5
2 show Leszek Benedyktowicz O+ VID M200 PL GPS 01:29:55 01:30:11.905 01:30:18.840 01:30:34 0.025 0.025 6.94 52.7
3 show Daniel Blazewicz O+ VID M350 PL GPS 01:29:30 01:30:20.634 01:30:27.787 01:31:28 0.010 0.015 7.15 54.3
4 show Anna Marciniak, Stanislaw Zola O+ CCD ?500 PL GPS 00:54:19 01:30:14.500 01:30:18.900 02:14:44 1.1 1.1 4.40 33.4
5 show Petr Zeleny O- VID M250 CZ GPS 01:27:50 01:32:12
6 show Marcin Filipek O- VID M250 PL GPS 01:30:03 01:30:32
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: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#83 : 26ee7420-c356-11ef-5276-7dee3dffbd82 [db: observed]
JPL#81 : 3fcc6250-85a2-11ef-78cd-b3c8dfb4bfad [db: asteroids]

Using prediction 26ee7420-c356-11ef-5276-7dee3dffbd82 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 = 61 x 52 km
a',b' = 30.3, 26.0 km
X0,Y0 = 828.0, 29.0 km
Mean diameter = 56 km

From 4 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: 2024-09-06, 01:29 UT (JD = 2460559.562)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 52951.019.680 196°, -53° 2.457319e63240.60.0° None2020-10-05 not scaled 2019-10-23
# 52961.019.680 15°, -50° 2.457319e63240.60.0° 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] : 26ee7420-c356-11ef-5276-7dee3dffbd82 [observed]

 Occultation Date + Time   : 2024-09-06 at 01:32:44 UT +/- 0.0 min  [1]
 Object Designation        : (395) Delia
 Orbit Class               : MBA
 Star Designation          : GDR3 0064762751001170048
 Star Coordinates (ICRF)   : RA = 03 43 46.2926, DE = +22 20 52.914  [2]
 Star Magnitudes           : G = 11.57 mag, RP = 10.99 mag, BP = 11.97 mag
 Object Magnitude          : V = 15.84 mag
 Estimated Magnitude Drop  : 4.3 mag
 Estimated Max. Duration   : 6.7 sec
 Object Mean Diameter      : 51 km  (src: astorb)
 Speed of the shadow       : 7.6 km/s
 Elongation to Moon & Sun  : 138° (sunlit = 8%), Sun = 105°
 Cross-track uncertainty   : 0.4 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.33 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#83

 
 [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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