19180+2012 COU 321

 
 
19h 17m 57.89s +20 11' 33.7" P.A. 156.8 sep 0.18 mag 8.92,8.92 Sp A5 dist. 135.32 pc (441.41 l.y.)
 
 
Coord 2000
19180+2012
Discov num
COU 321
Comp
Coord arcsec 2000
19 17 57.89 +20 11 33.7
Date first
1968
Date last
2007
Obs
32
Pa first
133
Pa last
147
P.A. Now (θ)
156.8°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.18"
Mag pri
8.92
Mag sec
8.92
delta mag (ΔM)
0
Spectral class
A5 (white)
Pri motion ra
+005
Sec motion ra
Pri motion dec
-026
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
146.9
Precise sep
0.107
Constellation
Sagitta
SAO
87042
HIP
94847
Tycho2
1607-00274-1
HD
181025
BD
BD+19 3972
Distance
135.32
Distance ly
441.41
last precise pa
146.9
last precise sep
0.107
 
 
ORBITAL ELEMENTS
 
 
Period (P)354.12y± 20 Periastron (T)2349.4y± 2 Semi-major axis (a)0.484a± 0.02
Eccentricity (e)0.776± 0.1 Inclination (i)101°± 2 Longitude of periastron (ω)188.4°± 5
Node (Ω)142.2°± 3 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation1998
label rho theta
2000 0.067 303.0
2001 0.055 295.2
2002 0.044 283.4
2003 0.036 265.2
2004 0.033 240.1
2005 0.036 215.0
2006 0.044 196.7
2007 0.055 185.0
2008 0.068 177.3
2009 0.081 172.1
2010 0.094 168.3
2011 0.107 165.5
2012 0.120 163.3
2013 0.133 161.5
2014 0.146 160.0
2015 0.159 158.8
2016 0.172 157.7
2017 0.184 156.8
2018 0.196 156.0
2019 0.208 155.3
2020 0.220 154.7
2021 0.231 154.1
2022 0.243 153.6
2023 0.254 153.2
2024 0.265 152.7
2025 0.276 152.3
2026 0.286 152.0
2027 0.297 151.6
2028 0.307 151.3
2029 0.317 151.0
2030 0.327 150.8

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

grafico orbita





wds19180%2B2012b.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
19180+2012 COU 321 1998 31 133 0.1 8.92 8.92 A5 NO 191757.89+201133.7
19180+2012 COU 321 2007 32 147 0.1 8.92 8.92 A5 NO 191757.89+201133.7

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