17102+5430 STF 2138 AB (HD 155674)
17h 10m 10.51s +54° 29' 39.8" P.A. 133.00 sep 22.1 mag 8.99,9.36 Sp K6V+K6V dist. 19.86 pc (64.78 l.y.)
Coord 2000 |
17102+5430 |
|
Discov num |
STF2138 |
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Comp |
AB |
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Coord arcsec 2000 |
17 10 10.51 +54 29 39.8 |
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Date first |
1830 |
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Date last |
2019 |
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Obs |
67 |
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Pa first |
139 |
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Pa last |
132.8 |
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P.A. Now (θ) |
132.8° |
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Sep first |
22.3 |
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Sep last |
22.148 |
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Sep. Now (ρ) |
22.148" |
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Mag pri |
8.99 |
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Mag sec |
9.36 |
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delta mag (ΔM) |
0.37 |
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Spectral class |
K6V+K6V (yellow-orange/yellow-orange) |
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Pri motion ra |
+082 |
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Sec motion ra |
+086 |
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Pri motion dec |
-111 |
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Sec motion dec |
-103 |
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Notes |
N
O
T
(See Notes, Orbital solution, Parallax indicates physical) |
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rPM=0.065 (< 0.3, Physical double)
This double is physical.
17102+5430 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
HD 155674 |
30274 |
17 10 11 +54 29 40 |
STF 2138 AB |
2019 |
67 |
133 |
22.1 |
8.99 |
9.36 |
0.37 |
Y |
<=== |
Show |
|
30274 |
17 10 11 +54 29 40 |
SHY 89 AC |
1999 |
3 |
10 |
999.9 |
8.99 |
8.67 |
0.32 |
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Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 155674 |
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Constellation |
Draco |
|
SAO |
30274 |
|
HIP |
83988 |
|
Tycho2 |
3891-01304-1 |
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Gaia DR2 |
1420000579871414528 |
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HD |
155674 |
|
ADS |
10386 |
|
GL |
Gl 659A |
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BD |
BD+54 1861 |
|
Distance |
19.86 |
|
Distance ly |
64.78 |
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ORBITAL ELEMENTS
Period (P) | 4478y | ± 660 |
Periastron (T) | 4179y | ± 333 |
Semi-major axis (a) | 15.247a | ± 1.505 |
Eccentricity (e) | 0.47 | ± 0.13 |
Inclination (i) | 131° | ± 7 |
Longitude of periastron (ω) | 10° | ± 16 |
Node (Ω) | 321° | ± 6 |
Notes | n | |
Reference | Pko2021a | |
Equinox | | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
133.1 |
22.125 |
2001 |
133.1 |
22.123 |
2002 |
133.0 |
22.121 |
2003 |
133.0 |
22.119 |
2004 |
133.0 |
22.118 |
2005 |
133.0 |
22.116 |
2006 |
132.9 |
22.114 |
2007 |
132.9 |
22.112 |
2008 |
132.9 |
22.110 |
2009 |
132.9 |
22.108 |
2010 |
132.9 |
22.106 |
2011 |
132.8 |
22.104 |
2012 |
132.8 |
22.102 |
2013 |
132.8 |
22.100 |
2014 |
132.8 |
22.098 |
2015 |
132.7 |
22.096 |
2016 |
132.7 |
22.094 |
2017 |
132.7 |
22.092 |
2018 |
132.7 |
22.089 |
2019 |
132.7 |
22.087 |
2020 |
132.6 |
22.085 |
2021 |
132.6 |
22.083 |
2022 |
132.6 |
22.081 |
2023 |
132.6 |
22.079 |
2024 |
132.5 |
22.077 |
2025 |
132.5 |
22.075 |
2026 |
132.5 |
22.072 |
2027 |
132.5 |
22.070 |
2028 |
132.5 |
22.068 |
2029 |
132.4 |
22.066 |
2030 |
132.4 |
22.064 |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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