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Doubles in session


Current system
18443+3940
STFA 37 BI


Nearby doubles
16' : 18457+3942
BU 51AB

20' : 18426+3937
HJ 1341

26' : 18433+3918
BLL 35

28' : 18453+4005
ROE 50AB

29' : 18452+3914
STF2392AB

30' : 18465+3958
LDS4799

36' : 18418+4001
LSC 83

41' : 18436+4020
SLE 122

43' : 18478+3954
GRV 240

45' : 18481+3929
COU1609

46' : 18453+3856
COU1608

49' : 18483+3956
SLW1221

55' : 18466+3853
ES 2021AB

56' : 18397+3955
TDT 981

60' : 18483+4018
UC 3676

60' : 18480+3858
ES 2572

61' : 18490+3914
COU1610

66' : 18404+4028
SLE 92

67' : 18466+4042
HDS2663

71' : 18501+4002
HU 1192

72' : 18450+4051
COU1792

73' : 18496+4020
UC 3687

73' : 18381+3935
BU 50AB

76' : 18397+4035
AG 225AB

76' : 18507+3920
HDS2672

80' : 18432+3822
HDS2651



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Binary Systems
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Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

18443+3940 STFA 37 BI

 
 
18h 44m 20.30s +39° 40' 14.4" P.A. 137.00 sep 151.3 mag 6.10,10.12 Sp F1V dist. 49.78 pc (162.38 l.y.)
 
 
Coord 2000 18443+3940 Discov num STFA 37 Comp BI Coord arcsec 2000 18 44 20.30 +39 40 14.4
Date first 1872 Date last 2015 Obs 10
Pa first 136 Pa last 137.3 P.A. Now (θ) 137.3°
Sep first 145.5 Sep last 151.25 Sep. Now (ρ) 151.25"
Mag pri 6.10 Mag sec 10.12 delta mag (ΔM) 4.02 Spectral class F1V (yellow-white)
Pri motion ra +002 Sec motion ra -007
Pri motion dec +047 Sec motion dec -004
Notes N (See Notes)
rPM=1.101
This double is not 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 2023 654 344 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 2023 25 137 150.0 5.15 10.12 4.97
Show 67310 18 44 20 +39 40 14 STFA 37 BC 2011 14 172 210.9 6.10 5.25 0.85
Show 67310 18 44 20 +39 40 14 STFA 37 BD 2021 12 171 212.5 6.10 5.38 0.72
Show 67310 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 2023 655 73 2.4 5.25 5.38 0.13 Y
Show 18 44 23 +39 36 46 SHJ 277 CD,F 2023 4 359 91.5 4.56 12.70 8.14
Show 18 44 23 +39 36 46 SHJ 277 CD,G 2023 5 290 74.7 4.56 14.20 9.64
Show 18 44 23 +39 36 46 SHJ 277 CD,H 2023 5 311 94.9 4.56 13.90 9.34
Show 18 44 23 +39 36 46 STF 2383 CE 2023 9 332 61.8 5.25 12.30 7.05
Show 67315 18 44 23 +39 36 46 STFA 37 CI 2023 19 36 120.3 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 18 44 20 +39 37 43 SHJ 277 EF 2023 17 36 45.3 12.30 12.70 0.40
Show 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
 
 
Constellation Lyra SAO 67309 HIP 91919 Tycho2 3122-03438-1
Gaia DR2 2098237656065233792 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