20216+2346 STF2672

 
 
20h 21m 36.19s +23 45' 50.6" P.A. 352.10 sep 0.6 mag 9.34,9.60 Sp F8
 
 
Coord 2000
20216+2346
Discov num
STF2672
Comp
Coord arcsec 2000
20 21 36.19 +23 45 50.6
Date first
1831
Date last
2016
Obs
97
Pa first
278
Pa last
350
P.A. Now (θ)
352.1°
Sep first
1.1
Sep last
0.6
Sep. Now (ρ)
0.64"
Mag pri
9.34
Mag sec
9.60
delta mag (ΔM)
0.26
Spectral class
F8 (yellow-white)
Pri motion ra
+011
Sec motion ra
+011
Pri motion dec
+006
Sec motion dec
+006
Notes
O (Orbital solution)
Visually invisible, K-band or other infrared star This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
350.1
Precise sep
0.648
Constellation
Vulpecula
SAO
88567
Tycho2
2155-00709-1
Gaia DR2
40092466944
HD
193817
ADS
13750
last precise pa
350.1
last precise sep
0.648
 
 
ORBITAL ELEMENTS
 
 
Period (P)764y Periastron (T)2121.6y Semi-major axis (a)0.898a
Eccentricity (e)0.436 Inclination (i)41.4° Longitude of periastron (ω)41°
Node (Ω)40.6° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2016
label rho theta
2000 0.668 339.6
2001 0.667 340.1
2002 0.666 340.7
2003 0.664 341.3
2004 0.663 341.9
2005 0.662 342.5
2006 0.660 343.0
2007 0.659 343.6
2008 0.658 344.2
2009 0.657 344.8
2010 0.656 345.4
2011 0.654 346.0
2012 0.653 346.6
2013 0.652 347.2
2014 0.651 347.8
2015 0.650 348.4
2016 0.649 349.0
2017 0.648 349.6
2018 0.646 350.3
2019 0.645 350.9
2020 0.644 351.5
2021 0.643 352.1
2022 0.642 352.7
2023 0.641 353.4
2024 0.640 354.0
2025 0.639 354.6
2026 0.638 355.2
2027 0.637 355.9
2028 0.636 356.5
2029 0.635 357.1
2030 0.634 357.8

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






wds20216%2B2346a.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
20216+2346 STF2672 2005 87 344 0.6 9.34 9.60 F8 202136.19+234550.6
20216+2346 STF2672 2006 90 343 0.7 9.34 9.60 F8 202136.19+234550.6
20216+2346 STF2672 2010 92 346 0.6 9.34 9.60 F8 202136.19+234550.6
20216+2346 STF2672 2016 96 350 0.7 9.34 9.60 F8 202136.19+234550.6

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