Collaborative Occultation
Resources and Archive
CORA
Occultations | Observations | Reports | Info + Credits | JOA | Admin | Login

Stellar Occultation by (117307) 2004 VY21 on 2025-09-20 (22:14:25 UT)

CTU: Cross-track uncertainty (zero means: use the nominal prediction value, see event details below). Offsets and CTU all in mas.


Event Details
 Occultation UUID [and db] : 79447a90-ddb7-11f0-547e-8cf25fd7a601 [observed]

 Occultation Date + Time   : 2025-09-20 at 22:14:25 UT +/- 0.02 min  [1]
 Object Designation        : (117307) 2004 VY21
 Star Designation          : GDR3 4241062711963005312
 Star Coordinates (ICRF)   : RA = 19 54 32.2008, DE = +02 15 27.509  [2]
 Star Magnitudes           : G = 12.71 mag, RP = 11.9 mag, BP = 13.4 mag
 Object Magnitude          : V = 18.2 mag
 Estimated Magnitude Drop  : 5.5 mag
 Estimated Max. Duration   : 0.5 sec
 Speed of the shadow       : 9.0 km/s
 Object Mean Diameter      : 4.4 km  (src: astorb) => apparent = 4 mas
 Apparent Motion           : 0.4850 arcs/min @ PA = 128 deg
 Horizontal Parallax       : 5.7160 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 129° (sunlit = 1%), Sun = 120°
 Cross-track uncertainty   : 2.3 mas = 2 km = 0.58 path-width (1-sig)
 RUWE and duplicate source : 1.14 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#45
 Note                      : FP:true

 
 [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)


Interactive map

Download KMZ file

Aladin Sky Atlas
Aladin Lite direct link (has Gaia overlay)