18280+0612 CHR 71 (HD 170200)
18h 27m 58.77s +06° 11' 39.0" P.A. 16.00 sep 0.0 mag 6.50,6.60 Sp B8III-IV dist. 216.92 pc (707.59 l.y.)
Coord 2000 |
18280+0612 |
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Discov num |
CHR 71 |
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Comp |
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Coord arcsec 2000 |
18 27 58.77 +06 11 39.0 |
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Date first |
1985 |
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Date last |
2021 |
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Obs |
29 |
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Pa first |
312 |
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Pa last |
15.6 |
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P.A. Now (θ) |
339.4° |
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Sep first |
0.1 |
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Sep last |
0.05 |
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Sep. Now (ρ) |
0.062" |
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Mag pri |
6.50 |
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Mag sec |
6.60 |
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delta mag (ΔM) |
0.1 |
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Spectral class |
B8III-IV (blue-white) |
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Pri motion ra |
+004 |
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Sec motion ra |
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Pri motion dec |
-017 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 170200 |
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Constellation |
Serpens |
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SAO |
123516 |
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HIP |
90497 |
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Tycho2 |
0445-02136-1 |
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Gaia DR2 |
4477148783533394816 |
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HD |
170200 |
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HR |
6928 |
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GC |
25198 |
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BD |
BD+06 3790 |
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Distance |
216.92 |
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Distance ly |
707.59 |
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ORBITAL ELEMENTS
Period (P) | 19.827y | |
Periastron (T) | 2018.705y | |
Semi-major axis (a) | 0.069a | |
Eccentricity (e) | 0.224 | |
Inclination (i) | 138.9° | |
Longitude of periastron (ω) | 34.8° | |
Node (Ω) | 125.7° | |
Notes | n | |
Reference | Doc2019d | |
Equinox | 2000 | |
Last observation | 2018 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
64.9 |
0.044 |
2001 |
31.3 |
0.044 |
2002 |
2.8 |
0.051 |
2003 |
342.3 |
0.061 |
2004 |
327.3 |
0.070 |
2005 |
315.4 |
0.076 |
2006 |
305.1 |
0.080 |
2007 |
295.6 |
0.082 |
2008 |
286.0 |
0.081 |
2009 |
275.9 |
0.077 |
2010 |
264.6 |
0.073 |
2011 |
251.6 |
0.067 |
2012 |
236.1 |
0.061 |
2013 |
217.8 |
0.057 |
2014 |
197.3 |
0.055 |
2015 |
176.2 |
0.055 |
2016 |
155.6 |
0.056 |
2017 |
135.7 |
0.056 |
2018 |
114.9 |
0.053 |
2019 |
90.2 |
0.048 |
2020 |
59.2 |
0.043 |
2021 |
25.8 |
0.045 |
2022 |
358.7 |
0.053 |
2023 |
339.4 |
0.062 |
2024 |
325.1 |
0.071 |
2025 |
313.6 |
0.077 |
2026 |
303.5 |
0.081 |
2027 |
293.9 |
0.082 |
2028 |
284.3 |
0.080 |
2029 |
274.0 |
0.077 |
2030 |
262.5 |
0.072 |
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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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