21435+4448 LIN 1 Aa,Ab
21h 43m 27.29s +44° 48' 32.6" P.A. 187.00 sep 0.2 mag 9.30,9.40
| Coord 2000 |
21435+4448 |
|
Discov num |
LIN 1 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
21 43 27.29 +44 48 32.6 |
|
| Date first |
1992 |
|
Date last |
2008 |
|
Obs |
8 |
|
| Pa first |
186 |
|
Pa last |
187.3 |
|
P.A. Now (θ) |
187.3° |
|
| Sep first |
0.2 |
|
Sep last |
0.165 |
|
Sep. Now (ρ) |
0.165" |
|
| Mag pri |
9.30 |
|
Mag sec |
9.40 |
|
delta mag (ΔM) |
0.1 |
|
Spectral class |
|
|
| Pri motion ra |
+002 |
|
Sec motion ra |
|
|
| Pri motion dec |
+000 |
|
Sec motion dec |
|
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
21435+4448 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
21 43 27 +44 48 33 |
LIN 1 Aa,Ab |
2008 |
8 |
187 |
0.2 |
9.30 |
9.40 |
0.10 |
Y |
<=== |
| Show |
|
|
21 43 27 +44 48 33 |
HO 167 AB |
2015 |
25 |
205 |
1.3 |
10.36 |
11.52 |
1.16 |
|
|
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
Tycho2 |
3196-01821-1 |
|
Gaia DR2 |
1973917319422187264 |
|
ORBITAL ELEMENTS
| Period (P) | 15.523y | ± 0.2091 |
Periastron (T) | 1995.7142y | ± 5.5079 |
Semi-major axis (a) | 0.16413a | ± 0.0482 |
| Eccentricity (e) | 0.93712 | ± 0.36554 |
Inclination (i) | 106.475° | ± 8.814 |
Longitude of periastron (ω) | 118.833° | ± 87.607 |
| Node (Ω) | 169.088° | ± 27.489 |
Notes | | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2008 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
206.1 |
0.121 |
| 2001 |
202.5 |
0.140 |
| 2002 |
199.7 |
0.156 |
| 2003 |
197.4 |
0.168 |
| 2004 |
195.3 |
0.176 |
| 2005 |
193.4 |
0.181 |
| 2006 |
191.5 |
0.182 |
| 2007 |
189.6 |
0.177 |
| 2008 |
187.5 |
0.167 |
| 2009 |
185.0 |
0.148 |
| 2010 |
181.4 |
0.115 |
| 2011 |
171.5 |
0.046 |
| 2012 |
264.4 |
0.030 |
| 2013 |
227.5 |
0.058 |
| 2014 |
215.1 |
0.086 |
| 2015 |
208.6 |
0.110 |
| 2016 |
204.3 |
0.131 |
| 2017 |
201.1 |
0.148 |
| 2018 |
198.5 |
0.162 |
| 2019 |
196.3 |
0.172 |
| 2020 |
194.3 |
0.179 |
| 2021 |
192.5 |
0.182 |
| 2022 |
190.6 |
0.180 |
| 2023 |
188.6 |
0.173 |
| 2024 |
186.4 |
0.159 |
| 2025 |
183.5 |
0.134 |
| 2026 |
178.7 |
0.091 |
| 2027 |
316.0 |
0.022 |
| 2028 |
240.7 |
0.042 |
| 2029 |
220.3 |
0.071 |
| 2030 |
211.6 |
0.098 |
|
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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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