15318+4054 A 1634 AB

 
 
15h 31m 46.99s +40° 53' 57.7" P.A. 212.00 sep 0.1 mag 5.80,5.80 Sp A5V dist. 119.05 pc (388.34 l.y.)
 
 
Coord 2000 15318+4054 Discov num A  1634 Comp AB Coord arcsec 2000 15 31 46.99 +40 53 57.7
Date first 1907 Date last 2015 Obs 59
Pa first 237 Pa last 212.3 P.A. Now (θ) 80.4°
Sep first 0.1 Sep last 0.053 Sep. Now (ρ) 0.023"
Mag pri 5.80 Mag sec 5.80 delta mag (ΔM) 0 Spectral class A5V (white)
Pri motion ra -018 Sec motion ra
Pri motion dec -009 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
15318+4054 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 45590 15 31 47 +40 53 58 A 1634 AB 2015 59 212 0.1 5.80 5.80 0.00 Y <===
Show Nu2 Boo 45590 15 31 47 +40 53 58 BU 1450 AB,C 2020 8 89 93.8 5.01 13.94 8.93
Show 45590 15 31 47 +40 53 58 KZA 97 AB,D 2020 7 319 117.8 5.01 14.19 9.18
Quadruple system
5 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Bootes SAO 45590 HIP 76041 Tycho2 3055-02340-1
Gaia DR2 1389871281210807040 HD 138629 HR 5774 GC 20883
ADS 9688 BD BD+41 2611 Bayer Nu 2 Bootis Bayer name Nu2 Boo
Flamsteed 53 Bootis Flamsteed name 53 Boo Distance 119.05 Distance ly 388.34
Bayer greek ν2 Boo
 
 
ORBITAL ELEMENTS
 
 
Period (P)9.026y± 0.017 Periastron (T)2000.75y± 0.24 Semi-major axis (a)0.0615a± 0.0007
Eccentricity (e)0.006± 0.015 Inclination (i)109.7°± 1.2 Longitude of periastron (ω)293°± 9
Node (Ω)199.4°± 0.9 Notesn ReferenceHor2012a
Equinox2000 Last observation2010 Grade1(1=Definitive, 9=Indet.)
label theta rho
2000 310.1 0.022
2001 226.8 0.038
2002 205.1 0.059
2003 191.1 0.057
2004 165.7 0.033
2005 75.8 0.024
2006 34.1 0.050
2007 18.8 0.062
2008 2.8 0.048
2009 312.8 0.022
2010 227.7 0.037
2011 205.5 0.059
2012 191.5 0.057
2013 166.9 0.034
2014 78.0 0.024
2015 34.7 0.050
2016 19.2 0.062
2017 3.4 0.049
2018 315.4 0.023
2019 228.7 0.036
2020 205.9 0.058
2021 191.9 0.058
2022 168.0 0.035
2023 80.4 0.023
2024 35.2 0.049
2025 19.5 0.062
2026 3.9 0.049
2027 318.0 0.023
2028 229.7 0.035
2029 206.3 0.058
2030 192.3 0.058


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



 
 


wds15318%2B4054b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic