19307+2758 MCA 55 Aa,Ac

 
 
19h 30m 43.29s +27° 57' 34.9" P.A. 40.00 sep 0.3 mag 3.37,5.16 Sp K3III+B0V dist. 133.16 pc (434.37 l.y.)
 
 
Coord 2000 19307+2758 Discov num MCA  55 Comp Aa,Ac Coord arcsec 2000 19 30 43.29 +27 57 34.9
Date first 1976 Date last 2022 Obs 64
Pa first 186 Pa last 40 P.A. Now (θ) 233.8°
Sep first 0.4 Sep last 0.314 Sep. Now (ρ) 0.405"
Mag pri 3.37 Mag sec 5.16 delta mag (ΔM) 1.79 Spectral class K3III+B0V (yellow-orange/blue-white)
Pri motion ra -002 Sec motion ra -002
Pri motion dec -001 Sec motion dec -001
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
19307+2758 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 87301 19 30 43 +27 57 35 BNU 10 Aa,Ab 1995 2 160 0.0 3.37 5.00 1.63
Show 87301 19 30 43 +27 57 35 MCA 55 Aa,Ac 2022 64 40 0.3 3.37 5.16 1.79 Y <===
Show Albireo 87301 19 30 43 +27 57 35 STFA 43 AB 2022 292 54 34.6 3.19 4.68 1.49
Show 87301 19 30 43 +27 57 35 WAL 114 AC 2022 12 341 65.2 3.19 10.99 7.80
Show 87301 19 30 43 +27 57 35 CTT 17 AD 2022 12 32 108.2 3.19 12.24 9.05
Show 87301 19 30 43 +27 57 35 CTT 18 AE 2022 12 206 75.3 3.19 11.81 8.62
Show 87301 19 30 43 +27 57 35 SMR 34 AF 2022 8 45 59.1 3.19 12.00 8.81
Show 87301 19 30 43 +27 57 35 SMR 34 AG 2022 7 45 162.8 3.19 12.50 9.31
Show 87301 19 30 43 +27 57 35 SMR 34 AH 2022 8 117 54.5 3.19 12.50 9.31
Show 87301 19 30 43 +27 57 35 SMR 34 AI 2022 7 131 37.5 3.19 12.50 9.31
Show 87301 19 30 43 +27 57 35 SMR 34 AJ 2022 6 132 146.3 3.19 10.00 6.81
Show 87301 19 30 43 +27 57 35 SMR 34 AK 2022 7 277 141.9 3.19 11.50 8.31
Show 87301 19 30 43 +27 57 35 SMR 34 AL 2012 1 269 12.0 3.19 11.50 8.31
Show 87302 19 30 45 +27 57 55 RBR 12 Ba,Bb -1 0 -1 -1.0 5.10 9.20 4.10
15-fold system
12 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Albireo Var name NSV12105 Cyg Constellation Cygnus SAO 87301
HIP 95947 Tycho2 2133-02964-1 Gaia DR2 2026116260302988160 HD 183912
HR 7417 GC 26953 ADS 12540 BD BD+27 3410
Bayer Beta 1 Cygni Bayer name Bet1 Cyg Flamsteed 6 Cygni Flamsteed name 6 Cyg
FK5 732 Distance 133.16 Distance ly 434.37 Bayer greek β1 Cyg
Meaning the hen's beak
 
 
ORBITAL ELEMENTS
 
 
Period (P)68.61y± 5.79 Periastron (T)2015.4y± 1.4 Semi-major axis (a)0.558a± 0.033
Eccentricity (e)0.7869± 0.0096 Inclination (i)114.7°± 1.1 Longitude of periastron (ω)264.8°± 1.1
Node (Ω)255.3°± 6.2 Notesn ReferenceRbr2018
Equinox2000 Last observation2008 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 128.4 0.387
2001 125.6 0.385
2002 122.8 0.383
2003 119.9 0.380
2004 116.9 0.377
2005 113.9 0.372
2006 110.8 0.367
2007 107.6 0.360
2008 104.3 0.351
2009 100.8 0.339
2010 96.9 0.324
2011 92.6 0.303
2012 87.6 0.275
2013 81.2 0.235
2014 71.1 0.174
2015 42.3 0.081
2016 286.5 0.088
2017 261.3 0.184
2018 252.5 0.252
2019 247.0 0.301
2020 242.8 0.337
2021 239.4 0.365
2022 236.5 0.387
2023 233.8 0.405
2024 231.3 0.419
2025 229.0 0.431
2026 226.7 0.440
2027 224.6 0.447
2028 222.5 0.453
2029 220.5 0.457
2030 218.5 0.460


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.



 
 


wds19307%2B2758f.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic