15246+5413 HU 149 (HD 137588)
15h 24m 35.30s +54° 12' 46.1" P.A. 271.00 sep 0.7 mag 7.48,7.62 Sp K0 dist. 234.74 pc (765.72 l.y.)
Coord 2000 |
15246+5413 |
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Discov num |
HU 149 |
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Comp |
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Coord arcsec 2000 |
15 24 35.30 +54 12 46.1 |
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Date first |
1900 |
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Date last |
2017 |
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Obs |
81 |
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Pa first |
296 |
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Pa last |
271 |
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P.A. Now (θ) |
271° |
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Sep first |
0.2 |
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Sep last |
0.665 |
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Sep. Now (ρ) |
0.665" |
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Mag pri |
7.48 |
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Mag sec |
7.62 |
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delta mag (ΔM) |
0.14 |
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Spectral class |
K0 (yellow-orange) |
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Pri motion ra |
+039 |
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Sec motion ra |
+039 |
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Pri motion dec |
-055 |
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Sec motion dec |
-055 |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 137588 |
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Constellation |
Draco |
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SAO |
29514 |
|
HIP |
75425 |
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Tycho2 |
3869-00222-1 |
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Gaia DR2 |
1599559109384447104 |
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HD |
137588 |
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GC |
20735 |
|
ADS |
9628 |
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BD |
BD+54 1745 |
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Distance |
234.74 |
|
Distance ly |
765.72 |
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ORBITAL ELEMENTS
Period (P) | 770y | |
Periastron (T) | 1979.4y | |
Semi-major axis (a) | 0.776a | |
Eccentricity (e) | 0.17 | |
Inclination (i) | 96.8° | |
Longitude of periastron (ω) | 156° | |
Node (Ω) | 90.7° | |
Notes | | |
Reference | Zir2015a | |
Equinox | 2000 | |
Last observation | 2010 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
271.9 |
0.637 |
2001 |
271.8 |
0.638 |
2002 |
271.8 |
0.640 |
2003 |
271.7 |
0.641 |
2004 |
271.6 |
0.642 |
2005 |
271.5 |
0.644 |
2006 |
271.4 |
0.645 |
2007 |
271.4 |
0.646 |
2008 |
271.3 |
0.647 |
2009 |
271.2 |
0.648 |
2010 |
271.1 |
0.649 |
2011 |
271.1 |
0.649 |
2012 |
271.0 |
0.650 |
2013 |
270.9 |
0.651 |
2014 |
270.8 |
0.651 |
2015 |
270.7 |
0.652 |
2016 |
270.7 |
0.652 |
2017 |
270.6 |
0.653 |
2018 |
270.5 |
0.653 |
2019 |
270.4 |
0.653 |
2020 |
270.4 |
0.654 |
2021 |
270.3 |
0.654 |
2022 |
270.2 |
0.654 |
2023 |
270.1 |
0.654 |
2024 |
270.1 |
0.653 |
2025 |
270.0 |
0.653 |
2026 |
269.9 |
0.653 |
2027 |
269.8 |
0.653 |
2028 |
269.7 |
0.652 |
2029 |
269.7 |
0.652 |
2030 |
269.6 |
0.651 |
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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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