PLANETARY NEBULAE
NEBULEUSES PLANETAIRES VARIABLES

IC 4997

 

 

 
A.D. 2000 [hh mn sec]
18 12 07.5
Dec. 2000 [° ' "]
+06 51 25
Mag
log F(Hb)
-9.82
d [ "]
10.8
Vexp [km/s]
16
d [(kParsecs]
1.7
EB-V
0.4
 
   
   
   
 
   
 
   
   
   
   
   
   
   
   
   
   

 

 

 

 

Kohoutek L., 1966, Bulletin of the Astronomical Institute of Czechoslovakia, vol. 17, p.318
Photographic study of the variability in bright central stars of planetary nebulae on AGK2 and AGK3 plates

 

 

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