19490+1909 AGC  11AB (Zet Sge)

 
 
19h 48m 58.65s +19 08' 31.1" P.A. 157.5 sep 0.23 mag 5.64,6.04 Sp A1V dist. 78.19 pc (255.06 l.y.)
 
 
Coord 2000
19490+1909
Discov num
AGC  11
Comp
AB
Coord arcsec 2000
19 48 58.65 +19 08 31.1
Date first
1875
Date last
2007
Obs
260
Pa first
137
Pa last
182
P.A. Now (θ)
157.5°
Sep first
0.4
Sep last
0.2
Sep. Now (ρ)
0.23"
Mag pri
5.64
Mag sec
6.04
delta mag (ΔM)
0.4
Spectral class
A1V (white)
Pri motion ra
+019
Sec motion ra
Pri motion dec
+027
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
19490+1909 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Zet Sge 105298 19490+1909 AGC 11 AB 1875 2007 260 158 0.2 5.64 6.04 0.40 Y <===
Show 19490+1909 STF2585 AB,C 1819 2016 131 311 8.3 5.04 9.01 3.97
Show 19490+1909 STF2585 AB,D 1895 2005 10 246 76.0 5.04 11.00 5.96
Quadruple system
5 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
182.3
Precise sep
0.165
Name
Zet Sge
Cdsa2 id
AGC 11 AB
Constellation
Sagitta
SAO
105298
HIP
97496
HD
187362
HR
7546
GC
27431
ADS
12973
Bayer
Zeta Sagittae
Bayer name
Zet Sge
Flamsteed
8 Sagittae
Flamsteed name
8 Sge
Ra deg
19.816291666666668
De deg
19.141972222222222
Distance
78.19
Distance ly
255.06
last precise pa
182.3
last precise sep
0.165
 
 
ORBITAL ELEMENTS
 
 
Period (P)8487.9d (23.24y)± 4.9 Periastron (T)44199.6m (1979.892y)± 5.9 Semi-major axis (a)0.13605a± 0.00044
Eccentricity (e)0.7948± 0.0019 Inclination (i)132.33°± 0.41 Longitude of periastron (ω)355.3°± 1
Node (Ω)340.97°± 0.68 Note Grade1(1=Definitive, 9=Indet.)
Equinox2000 Last observation2007
label rho theta
2000 0.133 139.5
2001 0.098 130.6
2002 0.056 109.6
2003 0.027 4.5
2004 0.042 237.9
2005 0.083 204.2
2006 0.118 192.3
2007 0.148 185.6
2008 0.172 181.0
2009 0.192 177.5
2010 0.209 174.6
2011 0.222 172.0
2012 0.232 169.8
2013 0.238 167.6
2014 0.243 165.6
2015 0.244 163.6
2016 0.242 161.7
2017 0.238 159.6
2018 0.231 157.5
2019 0.220 155.2
2020 0.206 152.6
2021 0.189 149.6
2022 0.167 145.9
2023 0.140 141.0
2024 0.107 133.3
2025 0.067 117.2
2026 0.027 44.0
2027 0.034 257.7
2028 0.073 208.8
2029 0.110 194.4
2030 0.141 186.9

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

grafico orbita





wds19490%2B1909a.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
19490+1909 AGC 11 AB 2001 243 117 0.1 5.64 6.04 A1V NOD 194858.65+190831.1
19490+1909 AGC 11 AB 2004 246 28 0.1 5.64 6.04 A1V NOD 194858.65+190831.1
19490+1909 AGC 11 AB 2007 248 184 0.2 5.64 6.04 A1V NOD 194858.65+190831.1

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