20102+4357 STT 400 (HD 191854)
20h 10m 13.32s +43° 56' 44.2" P.A. 329.00 sep 0.7 mag 7.60,9.83 Sp G3V dist. 51.33 pc (167.44 l.y.)
Coord 2000 |
20102+4357 |
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Discov num |
STT 400 |
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Comp |
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Coord arcsec 2000 |
20 10 13.32 +43 56 44.2 |
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Date first |
1843 |
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Date last |
2017 |
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Obs |
242 |
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Pa first |
327 |
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Pa last |
328.7 |
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P.A. Now (θ) |
323.8° |
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Sep first |
0.5 |
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Sep last |
0.695 |
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Sep. Now (ρ) |
0.641" |
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Mag pri |
7.60 |
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Mag sec |
9.83 |
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delta mag (ΔM) |
2.23 |
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Spectral class |
G3V (yellow) |
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Pri motion ra |
+009 |
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Sec motion ra |
+009 |
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Pri motion dec |
+089 |
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Sec motion dec |
+089 |
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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 191854 |
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Constellation |
Cygnus |
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SAO |
49262 |
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HIP |
99376 |
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Tycho2 |
3163-01459-1 |
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Gaia DR2 |
2081078269591424896 |
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HD |
191854 |
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GC |
28005 |
|
ADS |
13461 |
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BD |
BD+43 3513 |
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Distance |
51.33 |
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Distance ly |
167.44 |
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ORBITAL ELEMENTS
Period (P) | 85.61y | |
Periastron (T) | 1970.27y | |
Semi-major axis (a) | 0.449a | |
Eccentricity (e) | 0.488 | |
Inclination (i) | 116.4° | |
Longitude of periastron (ω) | 339.4° | |
Node (Ω) | 142.2° | |
Notes | n | |
Reference | Hei1997 | |
Equinox | 2000 | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
345.0 |
0.491 |
2001 |
343.6 |
0.506 |
2002 |
342.4 |
0.522 |
2003 |
341.2 |
0.536 |
2004 |
340.1 |
0.549 |
2005 |
339.0 |
0.562 |
2006 |
338.0 |
0.574 |
2007 |
337.0 |
0.585 |
2008 |
336.1 |
0.595 |
2009 |
335.2 |
0.605 |
2010 |
334.3 |
0.613 |
2011 |
333.4 |
0.621 |
2012 |
332.6 |
0.628 |
2013 |
331.7 |
0.634 |
2014 |
330.9 |
0.639 |
2015 |
330.1 |
0.643 |
2016 |
329.3 |
0.646 |
2017 |
328.6 |
0.648 |
2018 |
327.8 |
0.649 |
2019 |
327.0 |
0.650 |
2020 |
326.2 |
0.649 |
2021 |
325.4 |
0.647 |
2022 |
324.6 |
0.644 |
2023 |
323.8 |
0.641 |
2024 |
323.0 |
0.636 |
2025 |
322.2 |
0.630 |
2026 |
321.4 |
0.623 |
2027 |
320.5 |
0.615 |
2028 |
319.6 |
0.605 |
2029 |
318.7 |
0.595 |
2030 |
317.8 |
0.583 |
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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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