Lynga catalogue

 Field                          Data

 Cluster number (IAU)          C1123-429
 Old Cluster                   NGC
 notation                      3680
 OCL number/Lund number        823   588
 Right ascension (1950.0)      11 23.3
 Declination (1950.0)          -42 58
 10 year prec. RA/Dec          .48 -3.2
 Galactic longitude            286.77
 Galactic latitude             16.93
 Sky survey                    SERC
 Chart type and number         J  266
 Centre of chart (RA,Dec)      11 40 -45
 Pos. on chart x,y mm          336   276
 Tr. cl. (ref. 19/320=a/b)     I 2 m  :b
 Membership (320)              30
 Angular diameter (320)        6
 Selected angular diameter     12 ( 255)
 Distance, weight              938
 Distance, reference           800 (  64)
 E(B-V), v=var.                0.066
 Turn-off col.,weight (jdl)    .45  w= 4
 Derived log(age)              9.077
 log(age), reference           9.26 ( 251)
 Fe/H (jdl)                    -0.19
 Radial velocity, weight       
 References                    209 /
 used by                       
 Janes, Duke                   
 and Lynga (jdl)               
 Number of member              
 stars with                    
 peculiar                      
 spectral                      
 types                         
 References for                
 peculiar                      
  stars                        
 Total V magnitude             7.6 ( 422)
 Integrated B-V (422)          .80
 Number of obs. stars (422)    66
 Richness class (265)          2
 Earliest sp. cl. (50,37)      
 Mag of brightest star (50)    10.0
 Galactic R and z              8310  230
 Linear diameter               2.8
 Comment