17146+1423 STF 2140 AB (Rasalgethi)

 
 
17h 14m 38.86s +14 23' 24.9" P.A. 103.00 sep 4.7 mag 3.48,5.40 Sp M5Ib-II dist. 110.25 pc (359.64 l.y.)
 
 
Coord 2000 17146+1423 Discov num STF2140 Comp AB Coord arcsec 2000 17 14 38.86 +14 23 24.9
Date first 1777 Date last 2020 Obs 513
Pa first 117 Pa last 102.7 P.A. Now (θ) 102.7°
Sep first 9.0 Sep last 4.68 Sep. Now (ρ) 4.68"
Mag pri 3.48 Mag sec 5.40 delta mag (ΔM) 1.92 Spectral class M5Ib-II (red)
Pri motion ra -017 Sec motion ra -007
Pri motion dec +047 Sec motion dec +033
Notes N O (See Notes, Orbital solution)
rPM=0.344
This double is physical.
 
 
17146+1423 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 102680 17 14 39 +14 23 25 CHR 139 Aa,Ab 1991 3 231 0.2 3.48
Show Rasalgethi 102680 17 14 39 +14 23 25 STF 2140 AB 2020 513 103 4.7 3.48 5.40 1.92 Y <===
Show 102680 17 14 39 +14 23 25 AGC 16 AC 2020 10 296 16.6 3.48 15.50 12.02
Show 102680 17 14 39 +14 23 25 STF 2140 AD 2002 14 39 79.2 3.48 11.10 7.62
Quintuple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Rasalgethi Var name Alp Her Constellation Hercules SAO 102680
HIP 84345 Tycho2 0990-02133-1 Gaia DR2 4541877995116193408 HD 156014
HR 6406 GC 23277 ADS 10418 BD BD+14 3207
Bayer Alpha 1 Herculis Bayer name Alp1 Her Flamsteed 64 Herculis Flamsteed name 64 Her
Distance 110.25 Distance ly 359.64 Bayer greek α1 Her
 
 
ORBITAL ELEMENTS
 
 
Period (P)3600y Periastron (T)1835y Semi-major axis (a)4.68a
Eccentricity (e)0 Inclination (i)155.8° Longitude of periastron (ω)
Node (Ω)119.6° Notesn ReferenceBaz1978
Equinox Last observation1970 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 104.5 4.648
2001 104.4 4.648
2002 104.3 4.647
2003 104.2 4.647
2004 104.1 4.647
2005 104.0 4.646
2006 103.9 4.646
2007 103.8 4.645
2008 103.7 4.645
2009 103.6 4.645
2010 103.6 4.644
2011 103.5 4.644
2012 103.4 4.644
2013 103.3 4.643
2014 103.2 4.643
2015 103.1 4.642
2016 103.0 4.642
2017 102.9 4.641
2018 102.8 4.641
2019 102.7 4.641
2020 102.6 4.640
2021 102.5 4.640
2022 102.4 4.639
2023 102.3 4.639
2024 102.3 4.639
2025 102.2 4.638
2026 102.1 4.638
2027 102.0 4.637
2028 101.9 4.637
2029 101.8 4.636
2030 101.7 4.636


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



 
 


wds17146%2B1423a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic