17551+3135 ITF  21

 
 
17h 55m 06.54s +31 34' 31.1" P.A. 313.00 sep 5.4 mag 17.50,19.00 Sp K4V+K7V
 
 
Coord 2000
17551+3135
Discov num
ITF  21
Comp
Coord arcsec 2000
17 55 06.54 +31 34 31.1
Date first
1952
Date last
2015
Obs
6
Pa first
310
Pa last
313
P.A. Now (θ)
313°
Sep first
5.1
Sep last
5.4
Sep. Now (ρ)
5.4"
Mag pri
17.50
Mag sec
19.00
delta mag (ΔM)
1.5
Spectral class
K4V+K7V (yellow-orange/yellow-orange)
Pri motion ra
+009
Sec motion ra
+009
Pri motion dec
-015
Sec motion dec
-015
Notes
V (Proper motion indicates physical)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
312.5
Precise sep
5.442
Constellation
Hercules
SAO
66463
Tycho2
2608-00792-1
Gaia DR2
4603813519471105280
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17551+3135 ITF 21 1998 2 310 5.6 17.50 19.00 K4V+K7V V 175507.18+313336.8
17551+3135 ITF 21 2015 3 313 5.4 17.50 19.00 K4V+K7V V 175506.54+313431.1

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