19138+3909 STF2487AB (Aladfar)

 
 
19h 13m 45.49s +39 08' 45.5" P.A. 80 sep 28.3 mag 4.38,8.58 Sp B2.5IV
 
 
Coord 2000
19138+3909
Discov num
STF2487
Comp
AB
Coord arcsec 2000
19 13 45.49 +39 08 45.5
Date first
1777
Date last
2016
Obs
73
Pa first
90
Pa last
80
P.A. Now (θ)
80°
Sep first
26.0
Sep last
28.3
Sep. Now (ρ)
28.3"
Mag pri
4.38
Mag sec
8.58
delta mag (ΔM)
4.2
Spectral class
B2.5IV (blue-white)
Pri motion ra
-001
Sec motion ra
+003
Pri motion dec
-001
Sec motion dec
+007
Notes
N (See Notes)
rPM=1.174
This double is not physical.
 
 
19138+3909 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Aladfar 68010 19138+3909 STF2487 AB 1777 2016 73 80 28.3 4.38 8.58 4.20 <===
Show 68010 19138+3909 STF2487 AC 1880 2014 10 151 161.5 4.38 11.42 7.04
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
80.2
Precise sep
28.25
Common name
Aladfar
Meaning
claws (with? LYR)
Constellation
Lyra
SAO
68010
HD
180163
HR
7298
Bayer
Eta Lyrae
Bayer name
Eta Lyr
Flamsteed
20 Lyrae
Flamsteed name
20 Lyr
last precise pa
80.2
last precise sep
28.25
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19138+3909 STF2487 AB 2006 59 81 28.3 4.38 8.58 B2.5IV N D 191345.49+390845.5
19138+3909 STF2487 AB 2009 60 80 28.6 4.38 8.58 B2.5IV N D 191345.49+390845.5
19138+3909 STF2487 AB 2010 64 80 28.3 4.38 8.58 B2.5IV N D 191345.49+390845.5
19138+3909 STF2487 AB 2011 66 81 28.2 4.38 8.58 B2.5IV N D 191345.49+390845.5
19138+3909 STF2487 AB 2012 68 81 28.7 4.38 8.58 B2.5IV N D 191345.49+390845.5
19138+3909 STF2487 AB 2013 70 79 28.3 4.38 8.58 B2.5IV N D 191345.49+390845.5
19138+3909 STF2487 AB 2014 72 80 28.2 4.38 8.58 B2.5IV N D 191345.49+390845.5
19138+3909 STF2487 AB 2016 73 80 28.3 4.38 8.58 B2.5IV N 191345.49+390845.5

If you need more information about this double, apply for a data request form to the WDS.