18413+3018 STF 2367 AB
18h 41m 16.36s +30° 17' 40.9" P.A. 73.00 sep 0.4 mag 7.70,8.03 Sp G3IV dist. 136.05 pc (443.8 l.y.)
Coord 2000 |
18413+3018 |
|
Discov num |
STF2367 |
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Comp |
AB |
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Coord arcsec 2000 |
18 41 16.36 +30 17 40.9 |
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Date first |
1833 |
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Date last |
2019 |
|
Obs |
185 |
|
Pa first |
68 |
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Pa last |
73.3 |
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P.A. Now (θ) |
71.2° |
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Sep first |
0.4 |
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Sep last |
0.432 |
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Sep. Now (ρ) |
0.445" |
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Mag pri |
7.70 |
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Mag sec |
8.03 |
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delta mag (ΔM) |
0.33 |
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Spectral class |
G3IV (yellow) |
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Pri motion ra |
+004 |
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Sec motion ra |
|
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Pri motion dec |
-040 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
18413+3018 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
67250 |
18 41 16 +30 17 41 |
STF 2367 AB |
2019 |
185 |
73 |
0.4 |
7.70 |
8.03 |
0.33 |
Y |
<=== |
Show |
HD 172865 |
67250 |
18 41 16 +30 17 41 |
STF 2367 AB,C |
2019 |
81 |
192 |
14.1 |
7.05 |
8.75 |
1.70 |
|
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Show |
|
67250 |
18 41 16 +30 17 41 |
STF 2367 AB,D |
2007 |
3 |
84 |
21.9 |
7.05 |
12.00 |
4.95 |
|
|
Show |
|
67250 |
18 41 16 +30 17 41 |
STF 2367 AB,E |
2002 |
4 |
341 |
151.7 |
7.05 |
11.00 |
3.95 |
|
|
Show |
|
67250 |
18 41 16 +30 17 41 |
BTG 2 AB,F |
2007 |
3 |
173 |
42.4 |
7.05 |
15.10 |
8.05 |
|
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Sextuple system
7 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Lyra |
|
SAO |
67250 |
|
HIP |
91636 |
|
Tycho2 |
2637-00713-1 |
|
Gaia DR2 |
4587747627368445952 |
|
HD |
172865 |
|
GC |
25575 |
|
ADS |
11579 |
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BD |
BD+30 3271 |
|
Distance |
136.05 |
|
Distance ly |
443.8 |
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ORBITAL ELEMENTS
Period (P) | 92.2y | ± 0.41 |
Periastron (T) | 1980.82y | ± 0.015 |
Semi-major axis (a) | 0.239a | ± 0.0034 |
Eccentricity (e) | 0.91 | ± 0.002 |
Inclination (i) | 121° | ± 1.6 |
Longitude of periastron (ω) | 348° | ± 1.7 |
Node (Ω) | 244° | ± 1.1 |
Notes | n | |
Reference | Pbx2000b | |
Equinox | | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
78.3 |
0.322 |
2001 |
77.8 |
0.331 |
2002 |
77.4 |
0.340 |
2003 |
77.0 |
0.349 |
2004 |
76.6 |
0.357 |
2005 |
76.2 |
0.364 |
2006 |
75.9 |
0.372 |
2007 |
75.6 |
0.379 |
2008 |
75.2 |
0.385 |
2009 |
74.9 |
0.392 |
2010 |
74.6 |
0.397 |
2011 |
74.3 |
0.403 |
2012 |
74.0 |
0.408 |
2013 |
73.7 |
0.413 |
2014 |
73.5 |
0.418 |
2015 |
73.2 |
0.422 |
2016 |
72.9 |
0.426 |
2017 |
72.7 |
0.429 |
2018 |
72.4 |
0.433 |
2019 |
72.2 |
0.436 |
2020 |
71.9 |
0.438 |
2021 |
71.7 |
0.441 |
2022 |
71.4 |
0.443 |
2023 |
71.2 |
0.445 |
2024 |
70.9 |
0.446 |
2025 |
70.7 |
0.448 |
2026 |
70.5 |
0.449 |
2027 |
70.2 |
0.449 |
2028 |
70.0 |
0.450 |
2029 |
69.8 |
0.450 |
2030 |
69.5 |
0.449 |
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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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