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

18h 44m 20.34s +39° 40' 12.4" P.A. 172.00 sep 209.4 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 2021 Obs 98
Pa first 173 Pa last 171.8 P.A. Now (θ) 171.8°
Sep first 207.3 Sep last 209.4 Sep. Now (ρ) 209.4"
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 wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 67310 18 44 20 +39 40 12 STF 2382 AB 2021 641 345 2.2 5.15 6.10 0.95 Y
Show Double Double 67310 18 44 20 +39 40 12 STFA 37 AB,CD 2021 98 172 209.4 4.67 4.56 0.11 <===
Show 67310 18 44 20 +39 40 12 STFA 37 AD 2021 19 172 208.2 5.15 5.38 0.23
Show 67310 18 44 20 +39 40 12 STFA 37 AI 2021 24 137 150.4 5.15 10.12 4.97
Show 67315 18 44 20 +39 40 14 STFA 37 BC 2011 14 172 210.9 6.10 5.25 0.85
Show 67315 18 44 20 +39 40 14 STFA 37 BD 2021 12 171 212.5 6.10 5.38 0.72
Show 18 44 20 +39 40 14 STFA 37 BI 2015 10 137 151.3 6.10 10.12 4.02
Show 67315 18 44 23 +39 36 46 CHR 77 Ca,Cb 2005 5 225 0.1 5.25 Y
Show 67315 18 44 23 +39 36 46 STF 2383 CD 2021 641 75 2.3 5.25 5.38 0.13 Y
Show 67315 18 44 23 +39 36 46 SHJ 277 CD,F 2015 3 0 93.3 4.56 12.70 8.14
Show 67315 18 44 23 +39 36 46 SHJ 277 CD,G 2015 4 293 75.1 4.56 14.20 9.64
Show 67315 18 44 23 +39 36 46 SHJ 277 CD,H 2015 4 313 95.7 4.56 13.90 9.34
Show 67310 18 44 23 +39 36 46 STF 2383 CE 2015 8 334 63.2 5.25 12.30 7.05
Show 18 44 23 +39 36 46 STFA 37 CI 2012 18 37 120.4 5.25 10.12 4.87
Show 67315 18 44 23 +39 36 46 STFA 37 DI 2000 6 37 121.6 5.38 10.12 4.74
Show 67310 18 44 20 +39 37 43 SHJ 277 EF 2021 16 37 45.4 12.30 12.70 0.40
Show 67310 18 44 20 +39 37 43 SHJ 277 EG 2015 11 236 50.0 12.30 14.20 1.90
Show 18 44 20 +39 37 43 STFA 37 EI 2015 7 68 108.9 12.30 10.12 2.18
Show 18 44 17 +39 37 16 SHJ 277 GH 2015 13 358 35.8 14.20 13.90 0.30


11-fold system
11 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Common name Double Double Constellation Lyra SAO 67310 HIP 91919
Tycho2 3122-03438-2 Gaia DR2 2098237660363229312 HD 173582 HR 7051
GC 25667 ADS 11635 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 Bayer greek ε1 Lyr
Other names Doppia Doppia della Lira