18443+3940 STFA 37AB,CD (Double Double)

 
 
18h 44m 20.34s +39 40' 12.4" P.A. 172 sep 209.5 mag 4.67,4.56 Sp A4V dist. 49.78 pc (162.38 l.y.)
 
 
Coord 2000
18443+3940
Discov num
STFA 37
Comp
AB,CD
Coord arcsec 2000
18 44 20.34 +39 40 12.4
Date first
1830
Date last
2016
Obs
97
Pa first
173
Pa last
172
P.A. Now (θ)
172°
Sep first
207.3
Sep last
209.5
Sep. Now (ρ)
209.5"
Mag pri
4.67
Mag sec
4.56
delta mag (ΔM)
0.11
Spectral class
A4V (white)
Pri motion ra
+011
Sec motion ra
+006
Pri motion dec
+061
Sec motion dec
+052
Notes
N Z (See Notes, Parallax indicates components are physical)
rPM=0.166 (< 0.3, Physical double)
This double is physical.
 
 
18443+3940 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Eps1 Lyr 67310 18443+3940 STF2382 AB 1777 2016 615 345 2.3 5.15 6.10 0.95 Y
Show Double Double 67310 18443+3940 STFA 37 AB,CD 1830 2016 97 172 209.5 4.67 4.56 0.11 <===
Show 67310 18443+3940 STFA 37 AD 1903 2013 17 172 208.6 5.15 5.38 0.23
Show 67310 18443+3940 STFA 37 AI 1863 2015 23 137 149.5 5.15 10.12 4.97
Show 67310 18443+3940 STFA 37 BC 1903 2011 14 172 210.9 6.10 5.25 0.85
Show 67310 18443+3940 STFA 37 BD 1903 2000 11 172 209.6 6.10 5.38 0.72
Show 67310 18443+3940 STFA 37 BI 1872 2015 10 137 151.3 6.10 10.12 4.02
Show 67315 18443+3940 CHR 77 Ca,Cb 1985 2005 5 225 0.1 5.25
Show 67315 18443+3940 STF2383 CD 1777 2016 621 75 2.4 5.25 5.38 0.13 Y
Show 67315 18443+3940 SHJ 277 CD,F 2002 2015 3 0 93.3 4.56 12.70 8.14
Show 67315 18443+3940 SHJ 277 CD,G 2000 2015 4 293 75.1 4.56 14.20 9.64
Show 67315 18443+3940 SHJ 277 CD,H 2000 2015 4 313 95.7 4.56 13.90 9.34
Show 67315 18443+3940 STF2383 CE 2000 2015 8 334 63.2 5.25 12.30 7.05
Show 67315 18443+3940 STFA 37 CI 1863 2012 18 37 120.4 5.25 10.12 4.87
Show 67315 18443+3940 STFA 37 DI 1909 2000 6 37 121.6 5.38 10.12 4.74
Show 18443+3940 SHJ 277 EF 1831 2015 10 37 45.6 12.30 12.70 0.40
Show 18443+3940 SHJ 277 EG 1878 2015 6 236 50.0 12.30 14.20 1.90
Show 18443+3940 STFA 37 EI 2000 2011 3 68 108.9 12.30 10.12 2.18
Show 18443+3940 SHJ 277 GH 1878 2015 8 358 35.8 14.20 13.90 0.30
11-fold system
11 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
171.9
Precise sep
209.5
Common name
Double Double
Other names
Doppia Doppia della Lira
Constellation
Lyra
SAO
67310
HIP
91919
Tycho2
3122-03438-2
HD
173582
HR
7051
GC
25667
BD
BD+39 3509
Bayer
Epsilon 1 Lyrae
Bayer name
Eps1 Lyr
Flamsteed
4 Lyrae
Flamsteed name
4 Lyr
Distance
49.78
Distance ly
162.38
last precise pa
171.9
last precise sep
209.5
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18443+3940 STFA 37 AB,CD 2008 83 174 209.4 5.15 5.25 NZ 184420.34+394012.4
18443+3940 STFA 37 AB,CD 2009 85 172 208.2 5.15 5.25 NZ 184420.34+394012.4
18443+3940 STFA 37 AB,CD 2010 88 182 210.7 4.67 4.56 NZ 184420.34+394012.4
18443+3940 STFA 37 AB,CD 2011 91 172 208.8 4.67 4.56 NZ 184420.34+394012.4
18443+3940 STFA 37 AB,CD 2013 94 171 207.9 4.67 4.56 A4V NZ 184420.34+394012.4
18443+3940 STFA 37 AB,CD 2015 95 172 208.7 4.67 4.56 A4V NZ 184420.34+394012.4
18443+3940 STFA 37 AB,CD 2016 97 172 209.5 4.67 4.56 A4V NZ 184420.34+394012.4

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