21069+3845 STF2758AB (61 Cyg)

 
 
21h 06m 53.95s +38 44' 57.9" P.A. 152.6 sep 31.78 mag 5.20,6.05 Sp K5V+K7V dist. 3.49 pc (11.38 l.y.)
 
 
Coord 2000
21069+3845
Discov num
STF2758
Comp
AB
Coord arcsec 2000
21 06 53.95 +38 44 57.9
Date first
1753
Date last
2018
Obs
1790
Pa first
35
Pa last
154
P.A. Now (θ)
152.6°
Sep first
19.6
Sep last
31.8
Sep. Now (ρ)
31.78"
Mag pri
5.20
Mag sec
6.05
delta mag (ΔM)
0.85
Spectral class
K5V+K7V (yellow-orange/yellow-orange)
Pri motion ra
+417
Sec motion ra
+412
Pri motion dec
+326
Sec motion dec
+313
Notes
N O P (See Notes, Orbital solution, 100-year proper motion)
rPM=0.026 (< 0.3, Physical double)
This double is physical.
 
 
21069+3845 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 61 Cyg 70919 21069+3845 STF2758 AB 1753 2018 1790 153 31.8 5.20 6.05 0.85 Y <===
Show 21069+3845 STF2758 AC 1907 2016 6 219 839.8 5.35 10.23 4.88
Show 21069+3845 STF2758 AD 1918 2016 4 250 748.0 5.35 10.45 5.10
Show 21069+3845 STF2758 AE 1918 2016 12 267 340.8 5.35 9.63 4.28
Show 21069+3845 STF2758 AF 1918 2016 10 240 371.2 5.35 11.30 5.95
Show 21069+3845 STF2758 AG 1921 2016 13 236 260.4 5.35 11.30 5.95
Show 21069+3845 STF2758 AH 1921 2017 31 268 117.5 5.35 9.97 4.62
Show 21069+3845 SMR 1 AI 1921 2017 13 239 28.3 5.35 10.74 5.39
Show 21069+3845 HZE 4 AJ 2006 2015 3 241 17.5 2.25 12.43 10.18
Show 21069+3845 HZE 4 AK 2006 2006 1 83 7.8 2.25 13.05 10.80
Show 21069+3845 SMR 40 AO 1998 2017 7 281 163.4 5.35 12.65 7.30
Show 21069+3845 SMR 40 AP 1998 2017 7 285 159.6 5.35 12.84 7.49
Show 21069+3845 SMR 40 AQ 1998 2016 4 316 68.1 5.35 13.19 7.84
Show 21069+3845 STF2758 BC 1879 2016 6 221 827.6 6.05 10.03 3.98
Show 21069+3845 HZE 4 BL 2006 2006 1 145 9.9 2.74 14.04 11.30
Show 21069+3845 FYM 106 BM 1998 2016 3 238 100.7 6.05 14.30 8.25
Show 21069+3845 FYM 106 BN 1998 2016 3 152 48.3 6.05 14.40 8.35
Show 21069+3845 TNN 15 BR 2005 2005 1 77 11.5 2.54 14.80 12.26
18-fold system
18 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
153.5
Precise sep
31.779
Name
61 Cyg
Var name
V1803 Cyg
Constellation
Cygnus
SAO
70919
HIP
104214
Tycho2
3168-02800-1
Gaia DR2
27813442688
HD
201091
HR
8085
GC
29509
ADS
14636
GL
Gl 820A
BD
BD+38 4343
Flamsteed
61 Cygni
Flamsteed name
61 Cyg
Distance
3.49
Distance ly
11.38
last precise pa
153.5
last precise sep
31.779
 
 
ORBITAL ELEMENTS
 
 
Period (P)678y± 34 Periastron (T)1709y± 16 Semi-major axis (a)24.272a± 0.592
Eccentricity (e)0.49± 0.03 Inclination (i)51°± 2 Longitude of periastron (ω)149°± 6
Node (Ω)178°± 2 Note Grade4(1=Definitive, 9=Indet.)
Equinox Last observation
label rho theta
2000 30.632 149.2
2001 30.697 149.4
2002 30.762 149.6
2003 30.826 149.8
2004 30.890 150.0
2005 30.953 150.1
2006 31.015 150.3
2007 31.078 150.5
2008 31.139 150.7
2009 31.200 150.8
2010 31.261 151.0
2011 31.321 151.2
2012 31.380 151.4
2013 31.439 151.5
2014 31.497 151.7
2015 31.555 151.9
2016 31.613 152.1
2017 31.669 152.2
2018 31.725 152.4
2019 31.781 152.6
2020 31.836 152.7
2021 31.890 152.9
2022 31.944 153.1
2023 31.998 153.2
2024 32.050 153.4
2025 32.103 153.6
2026 32.154 153.7
2027 32.205 153.9
2028 32.256 154.1
2029 32.306 154.2
2030 32.355 154.4

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






wds21069%2B3845b.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
21069+3845 STF2758 AB 2007 1620 151 31.1 5.20 6.05 K5V K7V NODP 210653.94+384457.8
21069+3845 STF2758 AB 2008 1621 151 31.0 5.20 6.05 K5V K7V NODP 210653.94+384457.8
21069+3845 STF2758 AB 2010 1642 154 31.1 5.20 6.05 K5V K7V NODP 210653.94+384457.8
21069+3845 STF2758 AB 2011 1647 151 31.9 5.20 6.05 K5V K7V NODP 210653.94+384457.8
21069+3845 STF2758 AB 2012 1652 152 31.4 5.35 6.10 K5V K7V NODP 210653.94+384457.8
21069+3845 STF2758 AB 2013 1666 152 31.5 5.20 6.05 K5V K7V NODP 210653.95+384457.9
21069+3845 STF2758 AB 2014 1668 152 31.5 5.20 6.05 K5V K7V NODP 210653.95+384457.9
21069+3845 STF2758 AB 2015 1672 153 31.4 5.20 6.05 K5V+K7V NO P 210653.95+384457.9
21069+3845 STF2758 AB 2016 1734 152 31.4 5.20 6.05 K5V+K7V NO P 210653.95+384457.9
21069+3845 STF2758 AB 2017 1736 153 31.7 5.20 6.05 K5V+K7V NO P 210653.95+384457.9
21069+3845 STF2758 AB 2018 1741 154 31.8 5.20 6.05 K5V+K7V NO P 210653.95+384457.9

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