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

Stellar Occultation by (4025) Ridley on 2025-12-25 (21:29:30 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] : 96367870-d996-11f1-43f3-5cf07fdfbbfe [observed]

 Occultation Date + Time   : 2025-12-25 at 21:29:30 UT +/- 0.01 min  [1]
 Object Designation        : (4025) Ridley
 Star Designation          : GDR3 0045204122769710336
 Star Coordinates (ICRF)   : RA = 04 10 30.0402, DE = +15 30 01.698  [2]
 Star Magnitudes           : G = 13.17 mag, RP = 12.44 mag, BP = 13.73 mag
 Object Magnitude          : V = 16.23 mag
 Estimated Magnitude Drop  : 3.1 mag
 Estimated Max. Duration   : 1.5 sec
 Speed of the shadow       : 4.0 km/s
 Object Mean Diameter      : 5.8 km  (src: astorb) => apparent = 8 mas
 Apparent Motion           : 0.3150 arcs/min @ PA = 281 deg
 Horizontal Parallax       : 8.3890 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 83° (sunlit = 30%), Sun = 149°
 Cross-track uncertainty   : 0.8 mas = 0 km = 0.10 path-width (1-sig)
 RUWE and duplicate source : 1.92 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL65
 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
Loading sky atlas…
Aladin Lite direct link (has Gaia overlay)