21441+2845 STF2822AB (Mu1 Cyg)

 
 
21H 44M 08.57S +28 44' 33.4" P.A. 323.2 SEP 1.52 MAG 4.75,6.18 SP F6V+G2V DIST. 22.24 PC (72.55 L.Y.)
 
 
Coord 2000
21441+2845
Discov num
STF2822
Comp
AB
Coord arcsec 2000
21 44 08.57 +28 44 33.4
Date first
1777
Date last
2016
Obs
720
Pa first
108
Pa last
321
P.A. Now (θ)
323.2°
Sep first
11.0
Sep last
1.8
Sep. Now (ρ)
1.52"
Mag pri
4.75
Mag sec
6.18
delta mag (ΔM)
1.43
Spectral class
F6V+G2V (yellow-white/yellow)
Pri motion ra
+260
Sec motion ra
+260
Pri motion dec
-243
Sec motion dec
-243
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
21441+2845 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Mu1 Cyg 89940 21441+2845 STF2822 AB 1777 2016 720 323 1.5 4.75 6.18 1.43 Y <===
Show 89939 21441+2845 STF2822 AC 1878 2012 16 292 76.6 4.75 12.93 8.18
Show 89939 21441+2845 STF2822 AD 1800 2014 54 44 196.9 4.75 6.94 2.19
Show 89939 21441+2845 FYM 25 AF 1999 2012 3 72 111.5 4.75 12.64 7.89
Show 89939 21441+2845 FYM 25 AG 1999 2012 3 73 168.1 4.75 13.77 9.02
Show 89939 21441+2845 STF2822 BD 1823 2012 24 45 196.7 6.18 6.94 0.76
Show 89944 21441+2845 ES 521 DE 1907 2015 6 286 17.5 6.94 13.13 6.19
Show 89944 21441+2845 FYM 25 DG 1999 2012 3 164 89.6 6.94 13.77 6.83
Septuple system
7 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name
Mu1 Cyg
Constellation
Cygnus
SAO
89940
HIP
107310
Tycho2
2201-02078-1
HD
206826
HR
8309
GC
30438
ADS
15270
GL
Gl 836.6A
BD
BD+28 4169
Bayer
Mu 1 Cygni
Bayer name
Mu1 Cyg
Flamsteed
78 Cygni
Flamsteed name
78 Cyg
Distance
22.24
Distance ly
72.55
last precise pa
320.8
last precise sep
1.81
 
 
ORBITAL ELEMENTS
 
 
Period (P)789y Periastron (T)1958y Semi-major axis (a)5.32a
Eccentricity (e)0.66 Inclination (i)75.5° Longitude of periastron (ω)145.7°
Node (Ω)110.1° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 1.847 308.5
2001 1.829 309.2
2002 1.811 309.9
2003 1.793 310.7
2004 1.774 311.4
2005 1.754 312.2
2006 1.735 313.0
2007 1.715 313.8
2008 1.695 314.6
2009 1.675 315.5
2010 1.655 316.4
2011 1.635 317.3
2012 1.615 318.2
2013 1.595 319.1
2014 1.575 320.1
2015 1.555 321.1
2016 1.535 322.1
2017 1.516 323.2
2018 1.496 324.2
2019 1.477 325.3
2020 1.458 326.5
2021 1.439 327.6
2022 1.421 328.8
2023 1.403 330.0
2024 1.385 331.3
2025 1.368 332.6
2026 1.351 333.9
2027 1.335 335.2
2028 1.320 336.6
2029 1.305 338.0
2030 1.290 339.4

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic