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 |
|
Discov num |
CHR 71 |
|
Comp |
|
|
Coord arcsec 2000 |
18 27 58.77 +06 11 39.0 |
|
| Date first |
1985 |
|
Date last |
2021 |
|
Obs |
29 |
|
| Pa first |
312 |
|
Pa last |
15.6 |
|
P.A. Now (θ) |
339.4° |
|
| Sep first |
0.1 |
|
Sep last |
0.05 |
|
Sep. Now (ρ) |
0.062" |
|
| Mag pri |
6.50 |
|
Mag sec |
6.60 |
|
delta mag (ΔM) |
0.1 |
|
Spectral class |
B8III-IV (blue-white) |
|
| Pri motion ra |
+004 |
|
Sec motion ra |
|
|
| Pri motion dec |
-017 |
|
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 |
|
Constellation |
Serpens |
|
SAO |
123516 |
|
HIP |
90497 |
|
| Tycho2 |
0445-02136-1 |
|
Gaia DR2 |
4477148783533394816 |
|
HD |
170200 |
|
HR |
6928 |
|
| GC |
25198 |
|
BD |
BD+06 3790 |
|
Distance |
216.92 |
|
Distance ly |
707.59 |
|
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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