17539-3445 B  1871 (V906 Sco)

 
 
17h 53m 54.77s -34 45' 09.8" P.A. 1.4 sep 0.03 mag 6.50,7.30 Sp B9V+B9V dist. 315.46 pc (1029.03 l.y.)
 
 
Coord 2000
17539-3445
Discov num
B  1871
Comp
Coord arcsec 2000
17 53 54.77 -34 45 09.8
Date first
1929
Date last
2010
Obs
15
Pa first
90
Pa last
274
P.A. Now (θ)
1.4°
Sep first
0.3
Sep last
0.3
Sep. Now (ρ)
0.03"
Mag pri
6.50
Mag sec
7.30
delta mag (ΔM)
0.8
Spectral class
B9V+B9V (blue-white/blue-white)
Pri motion ra
+007
Sec motion ra
Pri motion dec
-010
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
273.9
Precise sep
0.263
Var name
V906 Sco
Constellation
Scorpius
SAO
209428
HIP
87616
Tycho2
7386-00562-1
HD
162724
HR
6662
CD
CD-3412226
Distance
315.46
Distance ly
1029.03
last precise pa
273.9
last precise sep
0.263
 
 
ORBITAL ELEMENTS
 
 
Period (P)34.71y± 1.13 Periastron (T)1974.1y± 1.2 Semi-major axis (a)0.172a± 0.015
Eccentricity (e)0.001± 0.002 Inclination (i)80.5°± 6.8 Longitude of periastron (ω)183°± 9.7
Node (Ω)103°± 9.7 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.029 202.1
2001 0.045 244.9
2002 0.070 261.0
2003 0.096 268.6
2004 0.119 273.0
2005 0.139 276.0
2006 0.155 278.4
2007 0.166 280.3
2008 0.171 282.1
2009 0.171 283.8
2010 0.166 285.6
2011 0.155 287.6
2012 0.140 289.9
2013 0.120 292.9
2014 0.097 297.2
2015 0.071 304.5
2016 0.046 320.1
2017 0.029 1.4
2018 0.038 54.9
2019 0.062 77.1
2020 0.087 86.5
2021 0.112 91.7
2022 0.133 95.1
2023 0.150 97.6
2024 0.163 99.7
2025 0.170 101.5
2026 0.172 103.2
2027 0.169 104.9
2028 0.160 106.8
2029 0.146 109.0
2030 0.128 111.7

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

grafico orbita





wds17539-3445a.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
17539-3445 B 1871 1991 14 106 0.2 6.50 7.30 B9V+B9V NO 175354.77-344509.8
17539-3445 B 1871 2010 15 94 0.3 6.50 7.30 B9V+B9V NO 175354.77-344509.8

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