19450+4508 STF2579AB (Del Cyg)

 
 
19h 44m 58.44s +45 07' 50.5" P.A. 216.6 sep 2.74 mag 2.89,6.27 Sp B9.5IV dist. 50.58 pc (164.99 l.y.)
 
 
Coord 2000
19450+4508
Discov num
STF2579
Comp
AB
Coord arcsec 2000
19 44 58.44 +45 07 50.5
Date first
1826
Date last
2016
Obs
481
Pa first
41
Pa last
215
P.A. Now (θ)
216.6°
Sep first
1.9
Sep last
2.7
Sep. Now (ρ)
2.74"
Mag pri
2.89
Mag sec
6.27
delta mag (ΔM)
3.38
Spectral class
B9.5IV (blue-white)
Pri motion ra
+051
Sec motion ra
Pri motion dec
+050
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
19450+4508 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Del Cyg 48796 19450+4508 STF2579 AB 1826 2016 481 217 2.7 2.89 6.27 3.38 Y <===
Show 48796 19450+4508 STF2579 AC 1913 2014 7 66 62.6 2.89 12.00 9.11
Show 48796 19450+4508 DAL 37 AD 1998 2007 3 246 42.0 2.89 14.80 11.91
Show 48796 19450+4508 DAL 37 AF 1998 2007 3 66 147.5 2.89 12.80 9.91
Show 48796 19450+4508 DAL 37 DE 1998 2007 3 250 3.3 14.80 15.20 0.40
Show 19450+4508 DAL 37 FG 2007 2007 1 311 3.2 13.00 13.80 0.80
Septuple system
7 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
215.4
Precise sep
2.7
Name
Del Cyg
Constellation
Cygnus
SAO
48796
HIP
97165
Tycho2
3557-02486-1
HD
186882
HR
7528
GC
27347
ADS
12880
BD
BD+44 3234
Bayer
Delta Cygni
Bayer name
Del Cyg
Flamsteed
18 Cygni
Flamsteed name
18 Cyg
Distance
50.58
Distance ly
164.99
last precise pa
215.4
last precise sep
2.7
 
 
ORBITAL ELEMENTS
 
 
Period (P)918.1y Periastron (T)1884.5y Semi-major axis (a)3.408a
Eccentricity (e)0.52 Inclination (i)146.9° Longitude of periastron (ω)129.7°
Node (Ω)95.7° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2012
label rho theta
2000 2.599 224.3
2001 2.608 223.9
2002 2.617 223.4
2003 2.625 222.9
2004 2.634 222.4
2005 2.642 222.0
2006 2.650 221.5
2007 2.659 221.0
2008 2.667 220.6
2009 2.676 220.1
2010 2.684 219.7
2011 2.693 219.2
2012 2.701 218.8
2013 2.710 218.3
2014 2.718 217.9
2015 2.726 217.4
2016 2.735 217.0
2017 2.743 216.6
2018 2.752 216.1
2019 2.760 215.7
2020 2.768 215.3
2021 2.777 214.9
2022 2.785 214.4
2023 2.793 214.0
2024 2.802 213.6
2025 2.810 213.2
2026 2.818 212.8
2027 2.827 212.4
2028 2.835 212.0
2029 2.843 211.6
2030 2.852 211.2

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

grafico orbita





wds19450%2B4508b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19450+4508 STF2579 AB 2007 439 222 2.5 2.89 6.27 B9.5IV NOD 194458.44+450750.5
19450+4508 STF2579 AB 2008 445 220 2.8 2.89 6.27 B9.5IV NOD 194458.44+450750.5
19450+4508 STF2579 AB 2010 451 220 2.7 2.89 6.27 B9.5IV NOD 194458.44+450750.5
19450+4508 STF2579 AB 2011 454 216 2.5 2.89 6.27 B9.5IV NOD 194458.44+450750.5
19450+4508 STF2579 AB 2013 461 218 2.5 2.89 6.27 B9.5IV NOD 194458.44+450750.5
19450+4508 STF2579 AB 2014 469 218 2.6 2.89 6.27 B9.5IV NOD 194458.44+450750.5
19450+4508 STF2579 AB 2015 472 217 2.7 2.89 6.27 B9.5IV NO 194458.44+450750.5
19450+4508 STF2579 AB 2016 481 215 2.7 2.89 6.27 B9.5IV NO 194458.44+450750.5

If you need more information about this double, apply for a data request form to the WDS.