18058+2127 STT 341 AB
18h 05m 49.72s +21° 26' 45.6" P.A. 89.00 sep 0.3 mag 7.39,8.82 Sp G0V+G5V dist. 39.45 pc (128.69 l.y.)
Coord 2000 |
18058+2127 |
|
Discov num |
STT 341 |
|
Comp |
AB |
|
Coord arcsec 2000 |
18 05 49.72 +21 26 45.6 |
|
Date first |
1843 |
|
Date last |
2021 |
|
Obs |
275 |
|
Pa first |
94 |
|
Pa last |
88.8 |
|
P.A. Now (θ) |
89.4° |
|
Sep first |
0.3 |
|
Sep last |
0.304 |
|
Sep. Now (ρ) |
0.387" |
|
Mag pri |
7.39 |
|
Mag sec |
8.82 |
|
delta mag (ΔM) |
1.43 |
|
Spectral class |
G0V+G5V (yellow/yellow) |
|
Pri motion ra |
-029 |
|
Sec motion ra |
-029 |
|
Pri motion dec |
-040 |
|
Sec motion dec |
-040 |
|
Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
18058+2127 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
85723 |
18 05 50 +21 26 46 |
STT 341 AB |
2021 |
275 |
89 |
0.3 |
7.39 |
8.82 |
1.43 |
Y |
<=== |
Show |
V772 Her |
85723 |
18 05 50 +21 26 46 |
STT 341 AB,C |
2015 |
19 |
171 |
28.2 |
7.20 |
10.56 |
3.36 |
|
|
Show |
|
85723 |
18 05 50 +21 26 46 |
STT 341 AB,D |
2009 |
16 |
99 |
39.5 |
7.20 |
10.48 |
3.28 |
|
|
Show |
|
85723 |
18 05 50 +21 26 46 |
STT 341 AB,E |
2018 |
19 |
38 |
66.5 |
7.20 |
10.25 |
3.05 |
|
|
Show |
|
85723 |
18 05 50 +21 26 46 |
STT 341 AB,F |
2009 |
9 |
357 |
111.6 |
7.20 |
11.49 |
4.29 |
|
|
Show |
|
85723 |
18 05 50 +21 26 46 |
STT 341 AB,G |
2018 |
20 |
239 |
132.5 |
7.20 |
7.64 |
0.44 |
|
|
Show |
|
85723 |
18 05 50 +21 26 46 |
MET 82 AH |
2004 |
1 |
63 |
2.6 |
5.80 |
14.30 |
8.50 |
|
|
Show |
|
85723 |
18 05 50 +21 26 46 |
MET 82 AI |
2004 |
1 |
111 |
6.5 |
5.80 |
18.80 |
13.00 |
|
|
Show |
|
85723 |
18 05 50 +21 26 46 |
MET 82 AJ |
2015 |
2 |
34 |
13.1 |
5.80 |
16.40 |
10.60 |
|
|
Decuple system
11 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Var name |
V772 Her |
|
Constellation |
Hercules |
|
SAO |
85723 |
|
HIP |
88637 |
|
Tycho2 |
1566-00747-1 |
|
Gaia DR2 |
4576326312901654272 |
|
HD |
165590 |
|
GC |
24664 |
|
ADS |
11060 |
|
BD |
BD+21 3302 |
|
Distance |
39.45 |
|
Distance ly |
128.69 |
|
ORBITAL ELEMENTS
Period (P) | 20.081y | |
Periastron (T) | 1978.438y | |
Semi-major axis (a) | 0.253a | |
Eccentricity (e) | 0.956 | |
Inclination (i) | 77° | |
Longitude of periastron (ω) | 3° | |
Node (Ω) | 270.8° | |
Notes | n | |
Reference | Hei1982b | |
Equinox | 2000 | |
Last observation | 1980 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
86.9 |
0.205 |
2001 |
88.1 |
0.284 |
2002 |
88.9 |
0.344 |
2003 |
89.5 |
0.390 |
2004 |
89.9 |
0.427 |
2005 |
90.3 |
0.454 |
2006 |
90.7 |
0.474 |
2007 |
91.0 |
0.487 |
2008 |
91.3 |
0.494 |
2009 |
91.6 |
0.493 |
2010 |
91.9 |
0.487 |
2011 |
92.3 |
0.473 |
2012 |
92.6 |
0.453 |
2013 |
93.0 |
0.425 |
2014 |
93.5 |
0.389 |
2015 |
94.0 |
0.343 |
2016 |
94.8 |
0.284 |
2017 |
96.1 |
0.208 |
2018 |
99.5 |
0.099 |
2019 |
82.0 |
0.075 |
2020 |
86.7 |
0.197 |
2021 |
88.1 |
0.278 |
2022 |
88.9 |
0.339 |
2023 |
89.4 |
0.387 |
2024 |
89.9 |
0.424 |
2025 |
90.3 |
0.452 |
2026 |
90.6 |
0.473 |
2027 |
91.0 |
0.486 |
2028 |
91.3 |
0.493 |
2029 |
91.6 |
0.494 |
2030 |
91.9 |
0.487 |
|
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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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