20172+1553 CHE 273AB

 
 
20h 17m 09.78s +15 52' 21.8" P.A. 94 sep 26.8 mag 7.48,13.40 Sp B9 dist. 287.36 pc (937.37 l.y.)
 
 
Coord 2000
20172+1553
Discov num
CHE 273
Comp
AB
Coord arcsec 2000
20 17 09.78 +15 52 21.8
Date first
1910
Date last
2015
Obs
7
Pa first
86
Pa last
94
P.A. Now (θ)
94°
Sep first
28.0
Sep last
26.8
Sep. Now (ρ)
26.8"
Mag pri
7.48
Mag sec
13.40
delta mag (ΔM)
5.92
Spectral class
B9 (blue-white)
Pri motion ra
-007
Sec motion ra
-001
Pri motion dec
-011
Sec motion dec
-053
Notes
N (See Notes)
rPM=0.8
Nature of this double is uncertain.
 
 
20172+1553 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20172+1553 CHE 273 AB 1910 2015 7 94 26.8 7.48 13.40 5.92 <===
Show 20172+1553 BKO 560 BC 2008 2008 1 199 1.4 13.40 15.40 2.00
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
94.4
Precise sep
26.781
Constellation
Delphinus
SAO
105926
HIP
99995
Tycho2
1631-00005-1
Gaia DR2
86454770304
HD
192954
BD
BD+15 4120
Distance
287.36
Distance ly
937.37
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20172+1553 CHE 273 AB 2008 5 94 27.2 7.48 13.40 D 201709.78+155221.8
20172+1553 CHE 273 AB 2015 7 94 26.8 7.48 13.40 B9 N 201709.78+155221.8

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