20320+2548 STF 2695 (HD 195692)
20h 31m 58.19s +25° 48' 18.1" P.A. 257.00 sep 0.3 mag 6.58,8.75 Sp Am+A2 dist. 87.03 pc (283.89 l.y.)
Coord 2000 |
20320+2548 |
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Discov num |
STF2695 |
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Comp |
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Coord arcsec 2000 |
20 31 58.19 +25 48 18.1 |
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Date first |
1830 |
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Date last |
2020 |
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Obs |
144 |
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Pa first |
79 |
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Pa last |
257.2 |
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P.A. Now (θ) |
259.4° |
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Sep first |
0.8 |
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Sep last |
0.32 |
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Sep. Now (ρ) |
0.429" |
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Mag pri |
6.58 |
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Mag sec |
8.75 |
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delta mag (ΔM) |
2.17 |
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Spectral class |
Am+A2 (white/white) |
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Pri motion ra |
+035 |
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Sec motion ra |
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Pri motion dec |
-016 |
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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 195692 |
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Constellation |
Vulpecula |
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SAO |
88808 |
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HIP |
101300 |
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Tycho2 |
2161-00330-1 |
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Gaia DR2 |
1831837091159294208 |
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HD |
195692 |
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HR |
7849 |
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GC |
28571 |
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ADS |
13964 |
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BD |
BD+25 4272 |
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Distance |
87.03 |
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Distance ly |
283.89 |
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ORBITAL ELEMENTS
Period (P) | 269y | |
Periastron (T) | 2016.37y | |
Semi-major axis (a) | 0.773a | |
Eccentricity (e) | 0.431 | |
Inclination (i) | 84.1° | |
Longitude of periastron (ω) | 174.1° | |
Node (Ω) | 77.4° | |
Notes | n | |
Reference | Alz2005a | |
Equinox | 2000 | |
Last observation | 2004 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
246.8 |
0.247 |
2001 |
247.9 |
0.265 |
2002 |
248.9 |
0.282 |
2003 |
249.8 |
0.298 |
2004 |
250.6 |
0.314 |
2005 |
251.3 |
0.330 |
2006 |
251.9 |
0.344 |
2007 |
252.5 |
0.358 |
2008 |
253.1 |
0.371 |
2009 |
253.6 |
0.383 |
2010 |
254.1 |
0.394 |
2011 |
254.6 |
0.404 |
2012 |
255.0 |
0.413 |
2013 |
255.4 |
0.421 |
2014 |
255.9 |
0.427 |
2015 |
256.3 |
0.432 |
2016 |
256.6 |
0.436 |
2017 |
257.0 |
0.439 |
2018 |
257.4 |
0.441 |
2019 |
257.8 |
0.441 |
2020 |
258.2 |
0.440 |
2021 |
258.6 |
0.437 |
2022 |
259.0 |
0.434 |
2023 |
259.4 |
0.429 |
2024 |
259.8 |
0.423 |
2025 |
260.2 |
0.416 |
2026 |
260.6 |
0.408 |
2027 |
261.1 |
0.399 |
2028 |
261.6 |
0.389 |
2029 |
262.1 |
0.378 |
2030 |
262.6 |
0.366 |
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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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