20198+4522 STT 406

 
 
20h 19m 49.69s +45 21' 49.7" P.A. 93.9 sep 0.26 mag 7.25,8.74 Sp F5IV dist. 92.51 pc (301.77 l.y.)
 
 
Coord 2000
20198+4522
Discov num
STT 406
Comp
Coord arcsec 2000
20 19 49.69 +45 21 49.7
Date first
1845
Date last
2011
Obs
158
Pa first
133
Pa last
100
P.A. Now (θ)
93.9°
Sep first
0.6
Sep last
0.3
Sep. Now (ρ)
0.26"
Mag pri
7.25
Mag sec
8.74
delta mag (ΔM)
1.49
Spectral class
F5IV (yellow-white)
Pri motion ra
+018
Sec motion ra
+018
Pri motion dec
-029
Sec motion dec
-029
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
99.6
Precise sep
0.318
Constellation
Cygnus
SAO
49481
HIP
100241
Tycho2
3572-00337-1
Gaia DR2
47057615104
HD
193701
ADS
13723
BD
BD+44 3429
Distance
92.51
Distance ly
301.77
last precise pa
99.6
last precise sep
0.318
 
 
ORBITAL ELEMENTS
 
 
Period (P)113.5y Periastron (T)1914.5y Semi-major axis (a)0.336a
Eccentricity (e)0.85 Inclination (i)128.7° Longitude of periastron (ω)151.5°
Node (Ω)101.3° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation1975
label rho theta
2000 0.502 109.2
2001 0.495 108.7
2002 0.487 108.2
2003 0.479 107.7
2004 0.470 107.2
2005 0.460 106.7
2006 0.451 106.1
2007 0.440 105.5
2008 0.429 104.9
2009 0.418 104.2
2010 0.406 103.5
2011 0.393 102.8
2012 0.380 102.0
2013 0.366 101.1
2014 0.351 100.2
2015 0.335 99.2
2016 0.319 98.1
2017 0.301 96.9
2018 0.282 95.5
2019 0.262 93.9
2020 0.241 92.0
2021 0.218 89.8
2022 0.193 87.0
2023 0.166 83.3
2024 0.137 78.2
2025 0.105 70.0
2026 0.070 53.9
2027 0.041 10.9
2028 0.047 300.1
2029 0.060 259.4
2030 0.068 230.6

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






wds20198%2B4522a.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
20198+4522 STT 406 2007 165 101 0.3 7.25 8.74 F5IV NOD 201949.69+452149.7
20198+4522 STT 406 2009 168 102 0.3 7.25 8.74 F5IV NOD 201949.69+452149.7
20198+4522 STT 406 2011 173 100 0.3 7.25 8.74 F5IV NO 201949.69+452149.7

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