18058+2127 STT 341 AB

 
 
18h 05m 49.72s +21° 26' 45.6" P.A. 89.00 sep 0.3 mag 7.39,8.82 Sp G0V+G5V dist. 39.45 pc (128.69 l.y.)
 
 
Coord 2000 18058+2127 Discov num STT 341 Comp AB Coord arcsec 2000 18 05 49.72 +21 26 45.6
Date first 1843 Date last 2021 Obs 275
Pa first 94 Pa last 88.8 P.A. Now (θ) 89.4°
Sep first 0.3 Sep last 0.304 Sep. Now (ρ) 0.387"
Mag pri 7.39 Mag sec 8.82 delta mag (ΔM) 1.43 Spectral class G0V+G5V (yellow/yellow)
Pri motion ra -029 Sec motion ra -029
Pri motion dec -040 Sec motion dec -040
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
18058+2127 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 85723 18 05 50 +21 26 46 STT 341 AB 2021 275 89 0.3 7.39 8.82 1.43 Y <===
Show V772 Her 85723 18 05 50 +21 26 46 STT 341 AB,C 2015 19 171 28.2 7.20 10.56 3.36
Show 85723 18 05 50 +21 26 46 STT 341 AB,D 2009 16 99 39.5 7.20 10.48 3.28
Show 85723 18 05 50 +21 26 46 STT 341 AB,E 2018 19 38 66.5 7.20 10.25 3.05
Show 85723 18 05 50 +21 26 46 STT 341 AB,F 2009 9 357 111.6 7.20 11.49 4.29
Show 85723 18 05 50 +21 26 46 STT 341 AB,G 2018 20 239 132.5 7.20 7.64 0.44
Show 85723 18 05 50 +21 26 46 MET 82 AH 2004 1 63 2.6 5.80 14.30 8.50
Show 85723 18 05 50 +21 26 46 MET 82 AI 2004 1 111 6.5 5.80 18.80 13.00
Show 85723 18 05 50 +21 26 46 MET 82 AJ 2015 2 34 13.1 5.80 16.40 10.60
Decuple system
11 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name V772 Her Constellation Hercules SAO 85723 HIP 88637
Tycho2 1566-00747-1 Gaia DR2 4576326312901654272 HD 165590 GC 24664
ADS 11060 BD BD+21 3302 Distance 39.45 Distance ly 128.69
 
 
ORBITAL ELEMENTS
 
 
Period (P)20.081y Periastron (T)1978.438y Semi-major axis (a)0.253a
Eccentricity (e)0.956 Inclination (i)77° Longitude of periastron (ω)
Node (Ω)270.8° Notesn ReferenceHei1982b
Equinox2000 Last observation1980 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 86.9 0.205
2001 88.1 0.284
2002 88.9 0.344
2003 89.5 0.390
2004 89.9 0.427
2005 90.3 0.454
2006 90.7 0.474
2007 91.0 0.487
2008 91.3 0.494
2009 91.6 0.493
2010 91.9 0.487
2011 92.3 0.473
2012 92.6 0.453
2013 93.0 0.425
2014 93.5 0.389
2015 94.0 0.343
2016 94.8 0.284
2017 96.1 0.208
2018 99.5 0.099
2019 82.0 0.075
2020 86.7 0.197
2021 88.1 0.278
2022 88.9 0.339
2023 89.4 0.387
2024 89.9 0.424
2025 90.3 0.452
2026 90.6 0.473
2027 91.0 0.486
2028 91.3 0.493
2029 91.6 0.494
2030 91.9 0.487


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



 
 


wds18058%2B2127a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic