14390+6417 KON 1 (EK Dra)
14h 39m 00.21s +64° 17' 29.9" P.A. 170.00 sep 0.8 mag 6.00,8.90 Sp G0V+M2 dist. 34.13 pc (111.33 l.y.)
Coord 2000 |
14390+6417 |
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Discov num |
KON 1 |
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Comp |
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Coord arcsec 2000 |
14 39 00.21 +64 17 29.9 |
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Date first |
1991 |
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Date last |
2009 |
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Obs |
16 |
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Pa first |
174 |
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Pa last |
170 |
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P.A. Now (θ) |
170° |
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Sep first |
0.3 |
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Sep last |
0.764 |
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Sep. Now (ρ) |
0.764" |
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Mag pri |
6.00 |
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Mag sec |
8.90 |
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delta mag (ΔM) |
2.9 |
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Spectral class |
G0V+M2 (yellow/red) |
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Pri motion ra |
-139 |
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Sec motion ra |
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Pri motion dec |
-012 |
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Sec motion dec |
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Notes |
N
O
K
(See Notes, Orbital solution, K-band or other infrared magnitudes) |
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Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Var name |
EK Dra |
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Constellation |
Draco |
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HIP |
71631 |
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Tycho2 |
4176-00540-1 |
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Gaia DR2 |
1668690628102524672 |
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HD |
129333 |
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GL |
Gl 559.1 |
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BD |
BD+64 1017 |
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Distance |
34.13 |
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Distance ly |
111.33 |
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ORBITAL ELEMENTS
Period (P) | 45y | ± 5 |
Periastron (T) | 46960d (1987.448y) | ± 30 |
Semi-major axis (a) | 0.412a | ± 0.015 |
Eccentricity (e) | 0.82 | ± 0.03 |
Inclination (i) | 95° | ± 3 |
Longitude of periastron (ω) | 180° | ± 10 |
Node (Ω) | 172° | ± 1 |
Notes | n | |
Reference | Kng2005 | |
Equinox | | |
Last observation | 2002 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
173.4 |
0.625 |
2001 |
173.2 |
0.650 |
2002 |
173.0 |
0.671 |
2003 |
172.9 |
0.690 |
2004 |
172.7 |
0.706 |
2005 |
172.6 |
0.720 |
2006 |
172.5 |
0.731 |
2007 |
172.4 |
0.739 |
2008 |
172.2 |
0.745 |
2009 |
172.1 |
0.749 |
2010 |
172.0 |
0.750 |
2011 |
171.9 |
0.748 |
2012 |
171.8 |
0.745 |
2013 |
171.6 |
0.739 |
2014 |
171.5 |
0.730 |
2015 |
171.4 |
0.719 |
2016 |
171.2 |
0.705 |
2017 |
171.1 |
0.688 |
2018 |
171.0 |
0.669 |
2019 |
170.8 |
0.647 |
2020 |
170.6 |
0.622 |
2021 |
170.4 |
0.594 |
2022 |
170.2 |
0.562 |
2023 |
170.0 |
0.527 |
2024 |
169.8 |
0.488 |
2025 |
169.4 |
0.445 |
2026 |
169.1 |
0.396 |
2027 |
168.6 |
0.343 |
2028 |
167.9 |
0.282 |
2029 |
166.7 |
0.214 |
2030 |
164.4 |
0.136 |
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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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