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2023-07-21 / TYC 1782-00252-1 / (409) Aspasia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Paul Koller O+ DRS T150 AT ? 00:10:08 00:10:42.8 00:10:46.5 00:11:29 1 1 3.70 96.2
2 show Peter Nosal O+ VID M250 SK NTP 00:9:17. 00:10:45.403 00:10:49.342 00:12:17 0.01 0.01 3.94 102.4
3 show Peter Delincak O+ VID M400 SK NTP 00:08:40 00:10:47.119 00:10:53.577 00:12:49 0.004 0.004 6.46 168.0
4 show Marcin Filipek O+ VID M250 PL GPS 00:10:20 00:10:50.150 00:10:56.720 00:11:32 0.05 0.05 6.57 170.8
5 show Mikhail Ashchepkau, Michel Turchenko O+ VID M150 BY PHONE 0:10:3.0 0:11:13.700 0:11:19.510 0:12:4.0 0.07 0.07 5.81 151.1
6 show Peter Mitrofanov O+ CCD M250 RU PHONE 0:10:0.0 0:11:22.960 0:11:27.500 0:11:36. 0.04 0.04 4.54 118.0
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

6 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#136 : ddfd12c0-ddb3-11f0-547e-2e24efff17ed [db: observed]

Using prediction ddfd12c0-ddb3-11f0-547e-2e24efff17ed 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 = 186 x 154 km
a',b' = 92.8, 77.1 km
X0,Y0 = 1416.7, 30.6 km
Mean diameter = 169 km

From 6 chords (CCD,VID,DRS)








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: 2023-07-21, 00:10 UT (JD = 2460146.507)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 215None9.021 3°, 30° 2.44431e615836.50.0° None2011-04-11 173.0 +/- 17.0 km 2011-03-28
# 7154.09.021 4°, 29° 2.44431e615836.50.0° None2017-06-19 164.0 +/- 3.0 km 2017-06-19
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] : ddfd12c0-ddb3-11f0-547e-2e24efff17ed [observed]

 Occultation Date + Time   : 2023-07-21 at 00:12:38 UT +/- 0.0 min  [1]
 Object Designation        : (409) Aspasia
 Orbit Class               : MBA
 Star Designation          : GDR3 0110081076948450560
 Star Coordinates (ICRF)   : RA = 02 56 35.2563, DE = +23 02 05.551  [2]
 Star Magnitudes           : G = 10.0 mag, RP = 9.57 mag, BP = 10.27 mag
 Object Magnitude          : V = 13.02 mag
 Estimated Magnitude Drop  : 3.1 mag
 Estimated Max. Duration   : 6.2 sec
 Object Mean Diameter      : 161.6 km  (src: astorb)
 Speed of the shadow       : 26.0 km/s
 Elongation to Moon & Sun  : 104° (sunlit = 9%), Sun = 70°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.16 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#136
 Note                      : FP:true

 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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