15318+4054 A  1634AB (Nu2 Boo)

 
 
15H 31M 46.99S +40 53' 57.7" P.A. 315.4 SEP 0.02 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
2010
Obs
55
Pa first
237
Pa last
35
P.A. Now (θ)
315.4°
Sep first
0.1
Sep last
0.0
Sep. Now (ρ)
0.02"
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_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Nu2 Boo 45590 15318+4054 A 1634 AB 1907 2010 55 315 0.0 5.80 5.80 0.00 Y <===
Show 45590 15318+4054 BU 1450 AB,C 1913 2002 5 88 93.5 5.01 13.94 8.93
Show 45590 15318+4054 KZA 97 AB,D 1984 2002 3 319 119.0 5.01 14.19 9.18
Quadruple system
5 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name
Nu2 Boo
Constellation
Bootes
SAO
45590
HIP
76041
Tycho2
3055-02340-1
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
last precise pa
34.5
last precise sep
0.048
 
 
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 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2010
label rho theta
2000 0.022 310.1
2001 0.038 226.8
2002 0.059 205.1
2003 0.057 191.1
2004 0.033 165.7
2005 0.024 75.8
2006 0.050 34.1
2007 0.062 18.8
2008 0.048 2.8
2009 0.022 312.8
2010 0.037 227.7
2011 0.059 205.5
2012 0.057 191.5
2013 0.034 166.9
2014 0.024 78.0
2015 0.050 34.7
2016 0.062 19.2
2017 0.049 3.4
2018 0.023 315.4
2019 0.036 228.7
2020 0.058 205.9
2021 0.058 191.9
2022 0.035 168.0
2023 0.023 80.4
2024 0.049 35.2
2025 0.062 19.5
2026 0.049 3.9
2027 0.023 318.0
2028 0.035 229.7
2029 0.058 206.3
2030 0.058 192.3

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic