20229+4259 HO  128AB

 
 
20h 22m 55.49s +42 59' 00.4" P.A. 356.40 sep 1.3 mag 6.41,8.82 Sp G8III dist. 102.99 pc (335.95 l.y.)
 
 
Coord 2000
20229+4259
Discov num
HO  128
Comp
AB
Coord arcsec 2000
20 22 55.49 +42 59 00.4
Date first
1886
Date last
2015
Obs
36
Pa first
35
Pa last
358
P.A. Now (θ)
356.4°
Sep first
1.0
Sep last
1.4
Sep. Now (ρ)
1.33"
Mag pri
6.41
Mag sec
8.82
delta mag (ΔM)
2.41
Spectral class
G8III (yellow)
Pri motion ra
+055
Sec motion ra
+055
Pri motion dec
+039
Sec motion dec
+039
Notes
N O (See Notes, Orbital solution)
Visually invisible, K-band or other infrared star This double is physical.
 
 
20229+4259 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 49550 20229+4259 HO 128 AB 1886 2015 36 356 1.3 6.41 8.82 2.41 Y <===
Show 49550 20229+4259 STTA207 AC 1876 2017 30 65 85.8 6.41 8.01 1.60
Show 49555 20229+4259 STTA207 CD 1908 2015 9 162 56.1 8.01 14.43 6.42
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
357.6
Precise sep
1.352
Constellation
Cygnus
SAO
49550
HIP
100515
Tycho2
3160-01936-1
Gaia DR2
33279278720
HD
194220
HR
7802
ADS
13786
BD
BD+42 3721
Distance
102.99
Distance ly
335.95
last precise pa
357.6
last precise sep
1.352
 
 
ORBITAL ELEMENTS
 
 
Period (P)1027.9807y± 507.5142 Periastron (T)2080.6251y± 32.5694 Semi-major axis (a)2.6928a± 1.91925
Eccentricity (e)0.70717± 0.24844 Inclination (i)103.488°± 8.825 Longitude of periastron (ω)248.513°± 20.476
Node (Ω)167.665°± 5.068 Note Grade5(1=Definitive, 9=Indet.)
Equinox Last observation2013
label rho theta
2000 1.362 1.0
2001 1.362 0.7
2002 1.361 0.5
2003 1.361 0.3
2004 1.361 0.1
2005 1.360 359.8
2006 1.359 359.6
2007 1.358 359.4
2008 1.357 359.1
2009 1.356 358.9
2010 1.355 358.7
2011 1.353 358.5
2012 1.352 358.2
2013 1.350 358.0
2014 1.348 357.8
2015 1.345 357.5
2016 1.343 357.3
2017 1.340 357.1
2018 1.337 356.8
2019 1.334 356.6
2020 1.331 356.4
2021 1.327 356.1
2022 1.324 355.9
2023 1.320 355.7
2024 1.315 355.4
2025 1.311 355.2
2026 1.306 354.9
2027 1.301 354.7
2028 1.296 354.4
2029 1.290 354.2
2030 1.284 353.9

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






wds20229%2B4259a.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
20229+4259 HO 128 AB 2003 28 360 1.4 6.41 8.82 G8III N D 202255.49+425900.4
20229+4259 HO 128 AB 2006 29 359 1.4 6.41 8.82 G8III N D 202255.49+425900.4
20229+4259 HO 128 AB 2010 32 358 1.4 6.41 8.82 G8III N D 202255.49+425900.4
20229+4259 HO 128 AB 2013 33 359 1.3 6.41 8.82 G8III N D 202255.49+425900.4
20229+4259 HO 128 AB 2015 36 358 1.4 6.41 8.82 G8III N 202255.49+425900.4

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