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Doubles in session


Current system
19307+2758
MCA 55 Aa,Ac


Nearby doubles
10' : 19304+2806
KPP 895

16' : 19315+2808
ES 485

19' : 19294+2748
OL 217

20' : 19306+2817
BU 651AB

22' : 19291+2756
LSC 86

26' : 19321+2816
BU 652AB

39' : 19284+2734
TDT1480

44' : 19305+2714
A 269

45' : 19317+2715
TDT1521

50' : 19323+2843
SLE 625

52' : 19268+2752
HO 451

53' : 19340+2729
ES 488

53' : 19301+2850
TDT1503

54' : 19338+2832
SLE 631

55' : 19330+2843
TDT1534

55' : 19339+2723
ES 487

56' : 19348+2750
COU1032

60' : 19316+2659
HDS2774AB

61' : 19353+2753
BKO 69AB

62' : 19282+2849
TDT1475

63' : 19332+2850
TDT1537

63' : 19354+2755
ES 489AB

65' : 19266+2826
MLB 473

66' : 19355+2742
TDS1000

66' : 19265+2722
HO 449

68' : 19321+2653
BRT3344



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Binocular doubles
Binary Systems
Triple Systems
Quadruple Systems
Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

19307+2758 MCA 55 Aa,Ac

 
 
19h 30m 43.29s +27° 57' 34.9" P.A. 32.00 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 2024 Obs 70
Pa first 186 Pa last 32 P.A. Now (θ) 226.7° (calc)
Sep first 0.4 Sep last 0.316 Sep. Now (ρ) 0.44" (calc)
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 2024 70 32 0.3 3.37 5.16 1.79 Y <===
Show Albireo 87301 19 30 43 +27 57 35 STFA 43 AB 2024 295 54 34.7 3.19 4.68 1.49
Show 87301 19 30 43 +27 57 35 WAL 114 AC 2023 13 339 64.8 3.19 10.99 7.80
Show 87301 19 30 43 +27 57 35 CTT 17 AD 2023 13 32 107.1 3.19 12.24 9.05
Show 87301 19 30 43 +27 57 35 CTT 18 AE 2023 13 205 76.1 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 2023 8 44 161.2 3.19 12.50 9.31
Show 87301 19 30 43 +27 57 35 SMR 34 AH 2023 9 118 53.9 3.19 12.50 9.31
Show 87301 19 30 43 +27 57 35 SMR 34 AI 2023 8 132 37.4 3.19 12.50 9.31
Show 87301 19 30 43 +27 57 35 SMR 34 AJ 2023 4 209 139.1 3.19 10.00 6.81
Show 87301 19 30 43 +27 57 35 SMR 34 AK 2023 8 276 142.0 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
15 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
2031 216.5 0.463
2032 214.5 0.464
2033 212.6 0.465
2034 210.6 0.465
2035 208.7 0.464
2036 206.7 0.463
2037 204.8 0.461
2038 202.8 0.459
2039 200.8 0.457
2040 198.7 0.455
2041 196.7 0.452
2042 194.6 0.449
2043 192.5 0.446
2044 190.4 0.443
2045 188.2 0.440
2046 186.0 0.436
2047 183.8 0.433
2048 181.5 0.430
2049 179.2 0.427
2050 176.9 0.424


 
 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