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

Stellar Occultation by (343627) 2010 HY31 on 2026-09-22 (03:57:31 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] : 1e8dbc00-d9b1-11f1-43f3-fb34fff73e6b [observed]

 Occultation Date + Time   : 2026-09-22 at 03:57:31 UT +/- 0.12 min  [1]
 Object Designation        : (343627) 2010 HY31
 Star Designation          : GDR3 3372384101503941888
 Star Coordinates (ICRF)   : RA = 06 24 45.5332, DE = +19 20 38.600  [2]
 Star Magnitudes           : G = 14.45 mag, RP = 13.87 mag, BP = 14.86 mag
 Object Magnitude          : V = 21.27 mag
 Estimated Magnitude Drop  : 6.8 mag
 Estimated Max. Duration   : 0.6 sec
 Speed of the shadow       : 15.1 km/s
 Object Mean Diameter      : 8.3 km  (src: astorb) => apparent = 2 mas
 Apparent Motion           : 0.2200 arcs/min @ PA = 111 deg
 Horizontal Parallax       : 1.5470 arcs
 Dynamical Class           : JTRO
 Elongation to Moon & Sun  : 150° (sunlit = 80%), Sun = 83°
 Cross-track uncertainty   : 17.3 mas = 71 km = 8.59 path-width (1-sig)
 RUWE and duplicate source : 0.98 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL38
 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)