20151+3742 COU2416

 
 
20h 15m 04.77s +37 41' 45.1" P.A. 144.4 sep 0.28 mag 8.00,8.50 Sp F0V
 
 
Coord 2000
20151+3742
Discov num
COU2416
Comp
Coord arcsec 2000
20 15 04.77 +37 41 45.1
Date first
1986
Date last
2011
Obs
16
Pa first
232
Pa last
118
P.A. Now (θ)
144.4°
Sep first
0.2
Sep last
0.3
Sep. Now (ρ)
0.28"
Mag pri
8.00
Mag sec
8.50
delta mag (ΔM)
0.5
Spectral class
F0V (yellow-white)
Pri motion ra
+034
Sec motion ra
Pri motion dec
+024
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
117.8
Precise sep
0.3
Constellation
Cygnus
SAO
69696
Tycho2
3151-01432-1
Gaia DR2
24369028224
HD
192744
last precise pa
117.8
last precise sep
0.3
 
 
ORBITAL ELEMENTS
 
 
Period (P)56.88y Periastron (T)1995.77y Semi-major axis (a)0.223a
Eccentricity (e)0.477 Inclination (i)37.8° Longitude of periastron (ω)248.7°
Node (Ω)95.7° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2009
label rho theta
2000 0.138 62.7
2001 0.156 72.8
2002 0.173 80.9
2003 0.188 87.6
2004 0.202 93.3
2005 0.215 98.3
2006 0.226 102.8
2007 0.235 106.9
2008 0.244 110.7
2009 0.251 114.3
2010 0.257 117.7
2011 0.262 120.9
2012 0.267 124.1
2013 0.270 127.1
2014 0.273 130.1
2015 0.275 133.0
2016 0.276 135.8
2017 0.277 138.7
2018 0.278 141.5
2019 0.278 144.4
2020 0.277 147.2
2021 0.276 150.1
2022 0.275 152.9
2023 0.273 155.9
2024 0.271 158.8
2025 0.269 161.8
2026 0.266 164.9
2027 0.263 168.0
2028 0.260 171.2
2029 0.257 174.5
2030 0.253 177.8

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






wds20151%2B3742c.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
20151+3742 COU2416 2005 12 100 0.2 8.00 8.50 F0V NO 201504.77+374145.1
20151+3742 COU2416 2007 13 111 0.2 8.00 8.50 F0V NO 201504.77+374145.1
20151+3742 COU2416 2009 15 117 0.3 8.00 8.50 F0V NO 201504.77+374145.1
20151+3742 COU2416 2011 16 118 0.3 8.00 8.50 F0V NO 201504.77+374145.1

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