15318+4054 A 1634 AB
15h 31m 46.99s +40° 53' 57.7" P.A. 209.00 sep 0.2 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 |
60 |
|
| Pa first |
237 |
|
Pa last |
209.1 |
|
P.A. Now (θ) |
3.9° (calc) |
|
| Sep first |
0.1 |
|
Sep last |
0.185 |
|
Sep. Now (ρ) |
0.049" (calc) |
|
| 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 |
60 |
209 |
0.2 |
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 |
8 |
319 |
117.8 |
5.01 |
14.19 |
9.18 |
|
|
Quadruple system
3 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+09 3081 |
|
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 |
Notes | n | |
Reference | Hor2012a | |
| Equinox | 2000 | |
Last observation | 2010 | |
Grade | 1 | (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 |
| 2031 |
169.1 |
0.036 |
| 2032 |
82.9 |
0.023 |
| 2033 |
35.7 |
0.049 |
| 2034 |
19.9 |
0.062 |
| 2035 |
4.4 |
0.050 |
| 2036 |
320.4 |
0.024 |
| 2037 |
230.8 |
0.035 |
| 2038 |
206.7 |
0.058 |
| 2039 |
192.7 |
0.058 |
| 2040 |
170.1 |
0.036 |
| 2041 |
85.4 |
0.023 |
| 2042 |
36.3 |
0.048 |
| 2043 |
20.2 |
0.062 |
| 2044 |
5.0 |
0.050 |
| 2045 |
322.7 |
0.024 |
| 2046 |
231.9 |
0.034 |
| 2047 |
207.1 |
0.057 |
| 2048 |
193.1 |
0.059 |
| 2049 |
171.0 |
0.037 |
| 2050 |
88.0 |
0.022 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
|
|
