17520+1520 STT 338AB

 
 
17h 51m 58.46s +15 19' 34.9" P.A. 163.4 sep 0.83 mag 7.21,7.38 Sp G8III dist. 234.19 pc (763.93 l.y.)
 
 
Coord 2000
17520+1520
Discov num
STT 338
Comp
AB
Coord arcsec 2000
17 51 58.46 +15 19 34.9
Date first
1843
Date last
2017
Obs
300
Pa first
223
Pa last
164
P.A. Now (θ)
163.4°
Sep first
0.6
Sep last
0.8
Sep. Now (ρ)
0.83"
Mag pri
7.21
Mag sec
7.38
delta mag (ΔM)
0.17
Spectral class
G8III (yellow)
Pri motion ra
-002
Sec motion ra
-002
Pri motion dec
+043
Sec motion dec
+043
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
17520+1520 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 103161 17520+1520 STT 338 AB 1843 2017 300 163 0.8 7.21 7.38 0.17 Y <===
Show 103161 17520+1520 STT 338 AC 1894 2015 6 202 32.6 7.21 13.10 5.89
Show 103161 17520+1520 STT 338 AD 1906 2015 7 247 96.3 7.21 11.60 4.39
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
163.7
Precise sep
0.81
Constellation
Hercules
SAO
103161
HIP
87427
Tycho2
1552-02535-1
HD
162734
HR
6665
ADS
10850
BD
BD+15 3292
Distance
234.19
Distance ly
763.93
last precise pa
163.7
last precise sep
0.81
 
 
ORBITAL ELEMENTS
 
 
Period (P)1276.6y Periastron (T)1799.9y Semi-major axis (a)1.14a
Eccentricity (e)0.582 Inclination (i)124.2° Longitude of periastron (ω)111.1°
Node (Ω)28.2° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2010
label rho theta
2000 0.824 167.9
2001 0.824 167.6
2002 0.824 167.4
2003 0.825 167.1
2004 0.825 166.9
2005 0.825 166.6
2006 0.826 166.4
2007 0.826 166.1
2008 0.826 165.9
2009 0.827 165.6
2010 0.827 165.4
2011 0.827 165.1
2012 0.828 164.9
2013 0.828 164.7
2014 0.828 164.4
2015 0.829 164.2
2016 0.829 163.9
2017 0.829 163.7
2018 0.830 163.4
2019 0.830 163.2
2020 0.830 163.0
2021 0.831 162.7
2022 0.831 162.5
2023 0.831 162.2
2024 0.832 162.0
2025 0.832 161.7
2026 0.832 161.5
2027 0.833 161.3
2028 0.833 161.0
2029 0.833 160.8
2030 0.833 160.5

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

grafico orbita





wds17520%2B1520b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17520+1520 STT 338 AB 2005 307 169 0.8 7.21 7.38 G8III N D 175158.46+151934.9
17520+1520 STT 338 AB 2008 309 165 0.8 7.21 7.38 G8III N D 175158.46+151934.9
17520+1520 STT 338 AB 2010 314 162 0.8 7.21 7.38 G8III N D 175158.46+151934.9
17520+1520 STT 338 AB 2013 320 163 0.8 7.21 7.38 G8III NOD 175158.46+151934.9
17520+1520 STT 338 AB 2015 294 163 0.7 7.21 7.38 G8III NO 175158.46+151934.9
17520+1520 STT 338 AB 2016 297 168 0.8 7.21 7.38 G8III NO 175158.46+151934.9
17520+1520 STT 338 AB 2017 300 164 0.8 7.21 7.38 G8III NO 175158.46+151934.9

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