17066+0039 BU 823 AB (HD 154621)
17h 06m 36.18s +00° 39' 07.9" P.A. 178.00 sep 1.1 mag 8.73,9.81 Sp G4.0V+K4V dist. 57.94 pc (189 l.y.)
| Coord 2000 |
17066+0039 |
|
Discov num |
BU 823 |
|
Comp |
AB |
|
Coord arcsec 2000 |
17 06 36.18 +00 39 07.9 |
|
| Date first |
1881 |
|
Date last |
2021 |
|
Obs |
168 |
|
| Pa first |
354 |
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Pa last |
177.6 |
|
P.A. Now (θ) |
177.6° |
|
| Sep first |
1.0 |
|
Sep last |
1.06 |
|
Sep. Now (ρ) |
1.06" |
|
| Mag pri |
8.73 |
|
Mag sec |
9.81 |
|
delta mag (ΔM) |
1.08 |
|
Spectral class |
G4.0V+K4V (yellow/yellow-orange) |
|
| Pri motion ra |
-021 |
|
Sec motion ra |
-021 |
|
| Pri motion dec |
-010 |
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Sec motion dec |
-010 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
17066+0039 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 154621 |
122078 |
17 06 36 +00 39 08 |
BU 823 AB |
2021 |
168 |
178 |
1.1 |
8.73 |
9.81 |
1.08 |
Y |
<=== |
| Show |
|
122078 |
17 06 36 +00 39 08 |
BU 823 AB,C |
2004 |
15 |
84 |
172.8 |
8.73 |
10.29 |
1.56 |
|
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| Show |
|
|
17 06 36 +00 39 08 |
TOK 52 Ba,Bb |
2021 |
19 |
342 |
0.1 |
10.60 |
10.50 |
0.10 |
Y |
|
Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 154621 |
|
Constellation |
Ophiuchus |
|
SAO |
122078 |
|
HIP |
83716 |
|
| Tycho2 |
0398-01509-1 |
|
Gaia DR2 |
4381580675941586176 |
|
HD |
154621 |
|
ADS |
10341 |
|
| BD |
BD+00 3633 |
|
Distance |
57.94 |
|
Distance ly |
189 |
|
ORBITAL ELEMENTS
| Period (P) | 900y | |
Periastron (T) | 1963.04y | ± 1.36 |
Semi-major axis (a) | 2.264a | ± 0.023 |
| Eccentricity (e) | 0.596 | ± 0.002 |
Inclination (i) | 40° | |
Longitude of periastron (ω) | 356.9° | ± 1.8 |
| Node (Ω) | 97.7° | ± 3.2 |
Notes | | |
Reference | Tok2021b | |
| Equinox | | |
Last observation | | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
149.7 |
0.953 |
| 2001 |
151.1 |
0.956 |
| 2002 |
152.5 |
0.960 |
| 2003 |
153.8 |
0.963 |
| 2004 |
155.2 |
0.967 |
| 2005 |
156.5 |
0.971 |
| 2006 |
157.8 |
0.975 |
| 2007 |
159.2 |
0.980 |
| 2008 |
160.5 |
0.985 |
| 2009 |
161.8 |
0.990 |
| 2010 |
163.0 |
0.995 |
| 2011 |
164.3 |
1.000 |
| 2012 |
165.6 |
1.006 |
| 2013 |
166.8 |
1.011 |
| 2014 |
168.0 |
1.017 |
| 2015 |
169.2 |
1.023 |
| 2016 |
170.4 |
1.030 |
| 2017 |
171.6 |
1.036 |
| 2018 |
172.8 |
1.043 |
| 2019 |
173.9 |
1.050 |
| 2020 |
175.1 |
1.057 |
| 2021 |
176.2 |
1.064 |
| 2022 |
177.3 |
1.071 |
| 2023 |
178.4 |
1.079 |
| 2024 |
179.5 |
1.087 |
| 2025 |
180.5 |
1.095 |
| 2026 |
181.6 |
1.103 |
| 2027 |
182.6 |
1.111 |
| 2028 |
183.6 |
1.119 |
| 2029 |
184.6 |
1.128 |
| 2030 |
185.6 |
1.136 |
|
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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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