17394-1546 HU  181

 
 
17h 39m 24.26s -15 45' 41.4" P.A. 44.10 sep 1.0 mag 9.70,10.06 Sp G6/8V dist. 186.92 pc (609.73 l.y.)
 
 
Coord 2000
17394-1546
Discov num
HU  181
Comp
Coord arcsec 2000
17 39 24.26 -15 45 41.4
Date first
1900
Date last
2016
Obs
30
Pa first
95
Pa last
42
P.A. Now (θ)
44.1°
Sep first
0.2
Sep last
1.0
Sep. Now (ρ)
1.03"
Mag pri
9.70
Mag sec
10.06
delta mag (ΔM)
0.36
Spectral class
G6/8V (yellow)
Pri motion ra
-042
Sec motion ra
-042
Pri motion dec
-063
Sec motion dec
-063
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
41.6
Precise sep
1.007
Constellation
Serpens
SAO
160722
HIP
86412
Tycho2
6248-00943-1
Gaia DR2
4124955830278638208
HD
160239
ADS
10683
BD
BD-15 4635
Distance
186.92
Distance ly
609.73
last precise pa
41.6
last precise sep
1.007
 
 
ORBITAL ELEMENTS
 
 
Period (P)209.66y Periastron (T)1912.36y Semi-major axis (a)0.644a
Eccentricity (e)0.676 Inclination (i)73.5° Longitude of periastron (ω)340.5°
Node (Ω)229.3° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation1998
label rho theta
2000 0.950 40.9
2001 0.956 41.1
2002 0.962 41.3
2003 0.967 41.4
2004 0.972 41.6
2005 0.977 41.7
2006 0.982 41.9
2007 0.986 42.1
2008 0.991 42.2
2009 0.995 42.4
2010 0.999 42.5
2011 1.003 42.7
2012 1.007 42.8
2013 1.010 43.0
2014 1.013 43.1
2015 1.016 43.2
2016 1.019 43.4
2017 1.022 43.5
2018 1.025 43.7
2019 1.027 43.8
2020 1.029 44.0
2021 1.031 44.1
2022 1.033 44.2
2023 1.034 44.4
2024 1.036 44.5
2025 1.037 44.7
2026 1.038 44.8
2027 1.039 44.9
2028 1.039 45.1
2029 1.040 45.2
2030 1.040 45.3


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



 
 


wds17394-1546a.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
17394-1546 HU 181 1998 28 39 0.9 9.70 10.06 G6/8V NOD 173924.26-154541.4
17394-1546 HU 181 2012 29 38 0.9 9.70 10.06 G6/8V NOD 173924.26-154541.4
17394-1546 HU 181 2014 29 41 1.0 9.70 10.06 G6/8V O 173924.26-154541.4

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