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2024-10-08 / HIP 102217 / (16) Psyche

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Orlando Benítez Sánchez, Juan Carlos Alcazar O+ VID L90 ES GPS 21:45:14 21:47:05.47 21:47:28.20 21:48:15 0.03 0.02 22.73 143.2
2 show Serge Dramonis O+ VID M400 GR GPS 21:48:00 21:53:44.04 21:54:0.67 21:56:30 0.02 0.02 16.63 104.8
3 show Alexandros Siakas, S. Tsavdaridis O+ CCD T406 GR GPS 21:51:00 21:53:19.034 21:53:42.380 21:55:00 0.01 0.01 23.35 147.1
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

3 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#91 : 1fc24090-c357-11ef-5276-2856ffef604c [db: observed]
JPL#91 : 9cb6b470-84f8-11ef-78cd-f29abe35131b [db: asteroids]
JPL#91 : 23fae580-824e-11ef-6618-5575dfe368cd [db: asteroids]
JPL#91 : 54a6d9a0-6e4e-11ef-4e13-dbca3fe80cdf [db: special]

Using prediction 9cb6b470-84f8-11ef-78cd-f29abe35131b 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 = 669 x 173 km
a',b' = 334.7, 86.7 km
X0,Y0 = 535.5, -23.3 km
Mean diameter = 341 km

From 3 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: 2024-10-08, 21:47 UT (JD = 2460592.408)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 113None4.196 32°, -7° 2.435467e625125.40.0° size from AO is 213+/-15 km2013-07-23 211.0 +/- 21.0 km 2011-03-27
# 18064.04.196 36°, -10° 2.4573574472e63235.00.0° nonconvex model, more details at http://observations.lam.fr/astero/2018-11-02 224.0 +/- 5.0 km 2018-11-01
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] : 9cb6b470-84f8-11ef-78cd-f29abe35131b [asteroids]

 Occultation Date + Time   : 2024-10-08 at 21:41:08 UT +/- 0.14 min  [1]
 Object Designation        : (16) Psyche
 Orbit Class               : MBA
 Star Designation          : GDR3 6861426348052317440
 Star Coordinates (ICRF)   : RA = 20 42 39.7788, DE = -18 06 34.717  [2]
 Star Magnitudes           : G = 7.27 mag, RP = 6.99 mag, BP = 7.42 mag
 Object Magnitude          : V = 10.88 mag
 Estimated Magnitude Drop  : 3.6 mag
 Estimated Max. Duration   : 39.9 sec
 Object Mean Diameter      : 253 km  (src: astorb)
 Speed of the shadow       : 6.3 km/s
 Elongation to Moon & Sun  : 45° (sunlit = 31%), Sun = 112°
 Cross-track uncertainty   : 17.0 mas = 25 km = 0.10 path-width (1-sig)
 RUWE and duplicate source : 1.0 mas, dup.src = 1  (0:false, 1:true)

 Ephemeris Reference       : JPL#91

 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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