17472+1502 HU 1288 (HD 161819)
17h 47m 09.16s +15° 02' 13.8" P.A. 163.00 sep 0.4 mag 8.31,9.37 Sp A0 dist. 311.53 pc (1016.21 l.y.)
Coord 2000 |
17472+1502 |
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Discov num |
HU 1288 |
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Comp |
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Coord arcsec 2000 |
17 47 09.16 +15 02 13.8 |
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Date first |
1905 |
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Date last |
2016 |
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Obs |
47 |
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Pa first |
116 |
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Pa last |
162.9 |
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P.A. Now (θ) |
162.9° |
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Sep first |
0.2 |
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Sep last |
0.435 |
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Sep. Now (ρ) |
0.435" |
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Mag pri |
8.31 |
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Mag sec |
9.37 |
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delta mag (ΔM) |
1.06 |
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Spectral class |
A0 (white) |
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Pri motion ra |
+001 |
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Sec motion ra |
+001 |
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Pri motion dec |
-010 |
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Sec motion dec |
-010 |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 161819 |
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Constellation |
Hercules |
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SAO |
103105 |
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HIP |
87047 |
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Tycho2 |
1552-00152-1 |
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HD |
161819 |
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ADS |
10796 |
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BD |
BD+15 3270 |
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Distance |
311.53 |
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Distance ly |
1016.21 |
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ORBITAL ELEMENTS
Period (P) | 765y | |
Periastron (T) | 2005y | |
Semi-major axis (a) | 0.519a | |
Eccentricity (e) | 0.16 | |
Inclination (i) | 64.5° | |
Longitude of periastron (ω) | 355.1° | |
Node (Ω) | 159.5° | |
Notes | | |
Reference | Zir2015a | |
Equinox | 2000 | |
Last observation | 2010 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
156.0 |
0.432 |
2001 |
156.2 |
0.433 |
2002 |
156.5 |
0.433 |
2003 |
156.8 |
0.434 |
2004 |
157.1 |
0.434 |
2005 |
157.4 |
0.435 |
2006 |
157.7 |
0.435 |
2007 |
158.0 |
0.435 |
2008 |
158.2 |
0.436 |
2009 |
158.5 |
0.436 |
2010 |
158.8 |
0.436 |
2011 |
159.1 |
0.436 |
2012 |
159.4 |
0.436 |
2013 |
159.7 |
0.436 |
2014 |
159.9 |
0.436 |
2015 |
160.2 |
0.436 |
2016 |
160.5 |
0.436 |
2017 |
160.8 |
0.436 |
2018 |
161.1 |
0.436 |
2019 |
161.4 |
0.436 |
2020 |
161.6 |
0.436 |
2021 |
161.9 |
0.435 |
2022 |
162.2 |
0.435 |
2023 |
162.5 |
0.435 |
2024 |
162.8 |
0.434 |
2025 |
163.1 |
0.434 |
2026 |
163.4 |
0.433 |
2027 |
163.6 |
0.433 |
2028 |
163.9 |
0.432 |
2029 |
164.2 |
0.432 |
2030 |
164.5 |
0.431 |
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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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