20290+0710 A 610 (HD 195090)
20h 29m 02.58s +07° 09' 29.3" P.A. 99.00 sep 0.6 mag 9.52,9.91 Sp G4.4V+G2V dist. 78.12 pc (254.83 l.y.)
| Coord 2000 |
20290+0710 |
|
Discov num |
A 610 |
|
Comp |
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Coord arcsec 2000 |
20 29 02.58 +07 09 29.3 |
|
| Date first |
1901 |
|
Date last |
2021 |
|
Obs |
88 |
|
| Pa first |
189 |
|
Pa last |
99 |
|
P.A. Now (θ) |
101.7° |
|
| Sep first |
0.5 |
|
Sep last |
0.555 |
|
Sep. Now (ρ) |
0.463" |
|
| Mag pri |
9.52 |
|
Mag sec |
9.91 |
|
delta mag (ΔM) |
0.39 |
|
Spectral class |
G4.4V+G2V (yellow/yellow) |
|
| Pri motion ra |
-050 |
|
Sec motion ra |
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| Pri motion dec |
-002 |
|
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 195090 |
|
Constellation |
Delphinus |
|
SAO |
125855 |
|
HIP |
101046 |
|
| Tycho2 |
0509-01364-1 |
|
HD |
195090 |
|
ADS |
13894 |
|
BD |
BD+06 4543 |
|
| Distance |
78.12 |
|
Distance ly |
254.83 |
|
ORBITAL ELEMENTS
| Period (P) | 170.62y | |
Periastron (T) | 1984.25y | |
Semi-major axis (a) | 0.472a | |
| Eccentricity (e) | 0.232 | |
Inclination (i) | 30.3° | |
Longitude of periastron (ω) | 285.2° | |
| Node (Ω) | 72° | |
Notes | n | |
Reference | Cot2002 | |
| Equinox | | |
Last observation | 2000 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
52.1 |
0.383 |
| 2001 |
54.7 |
0.388 |
| 2002 |
57.3 |
0.393 |
| 2003 |
59.8 |
0.398 |
| 2004 |
62.3 |
0.403 |
| 2005 |
64.7 |
0.407 |
| 2006 |
67.1 |
0.412 |
| 2007 |
69.4 |
0.416 |
| 2008 |
71.6 |
0.420 |
| 2009 |
73.8 |
0.424 |
| 2010 |
76.0 |
0.428 |
| 2011 |
78.1 |
0.432 |
| 2012 |
80.2 |
0.435 |
| 2013 |
82.3 |
0.438 |
| 2014 |
84.4 |
0.441 |
| 2015 |
86.4 |
0.444 |
| 2016 |
88.4 |
0.447 |
| 2017 |
90.3 |
0.450 |
| 2018 |
92.3 |
0.452 |
| 2019 |
94.2 |
0.455 |
| 2020 |
96.1 |
0.457 |
| 2021 |
98.0 |
0.459 |
| 2022 |
99.8 |
0.461 |
| 2023 |
101.7 |
0.463 |
| 2024 |
103.5 |
0.464 |
| 2025 |
105.3 |
0.466 |
| 2026 |
107.2 |
0.467 |
| 2027 |
109.0 |
0.469 |
| 2028 |
110.8 |
0.470 |
| 2029 |
112.5 |
0.471 |
| 2030 |
114.3 |
0.473 |
|
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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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