19550+4152 HO  581

 
 
19h 54m 58.40s +41 52' 17.6" P.A. 56.90 sep 0.3 mag 8.03,8.72 Sp G9V dist. 46.23 pc (150.8 l.y.)
 
 
Coord 2000
19550+4152
Discov num
HO  581
Comp
Coord arcsec 2000
19 54 58.40 +41 52 17.6
Date first
1895
Date last
2006
Obs
118
Pa first
258
Pa last
133
P.A. Now (θ)
56.9°
Sep first
0.3
Sep last
0.3
Sep. Now (ρ)
0.31"
Mag pri
8.03
Mag sec
8.72
delta mag (ΔM)
0.69
Spectral class
G9V (yellow)
Pri motion ra
-044
Sec motion ra
Pri motion dec
+293
Sec motion dec
Notes
N O (See Notes, Orbital solution)
Visually invisible, K-band or other infrared star This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
132.8
Precise sep
0.286
Constellation
Cygnus
SAO
48968
HIP
98001
Tycho2
3145-00504-1
Gaia DR2
56940805248
HD
188753
ADS
13125
BD
BD+41 3535
Distance
46.23
Distance ly
150.8
last precise pa
132.8
last precise sep
0.286
 
 
ORBITAL ELEMENTS
 
 
Period (P)25.63y± 0.04 Periastron (T)1988.1y± 0.1 Semi-major axis (a)258.7m± 2.8
Eccentricity (e)0.502± 0.008 Inclination (i)31.1°± 1.5 Longitude of periastron (ω)233.8°± 1.3
Node (Ω)45.7°± 1.1 Note Grade1(1=Definitive, 9=Indet.)
Equinox2000 Last observation2006
label rho theta
2000 0.357 90.1
2001 0.353 95.7
2002 0.346 101.3
2003 0.337 107.3
2004 0.325 113.7
2005 0.311 120.6
2006 0.294 128.2
2007 0.276 136.7
2008 0.257 146.5
2009 0.236 158.0
2010 0.214 171.8
2011 0.190 188.9
2012 0.164 211.1
2013 0.135 242.5
2014 0.114 289.3
2015 0.132 338.2
2016 0.174 8.8
2017 0.218 27.1
2018 0.255 39.6
2019 0.286 49.1
2020 0.310 56.9
2021 0.328 63.7
2022 0.342 69.9
2023 0.351 75.7
2024 0.356 81.2
2025 0.357 86.7
2026 0.356 92.2
2027 0.351 97.7
2028 0.343 103.5
2029 0.332 109.6
2030 0.320 116.2

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






wds19550%2B4152b.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
19550+4152 HO 581 2003 121 111 0.3 8.03 8.72 G9V NOD 195458.41+415215.0
19550+4152 HO 581 2006 122 133 0.3 8.03 8.72 G9V NOD 195458.41+415215.0

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