21056+6030 A 758 AB (HD 239570)
21h 05m 34.47s +60° 29' 33.5" P.A. 124.00 sep 0.4 mag 9.89,10.76 Sp A5 dist. 290.7 pc (948.26 l.y.)
| Coord 2000 |
21056+6030 |
|
Discov num |
A 758 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 05 34.47 +60 29 33.5 |
|
| Date first |
1904 |
|
Date last |
2008 |
|
Obs |
17 |
|
| Pa first |
353 |
|
Pa last |
124 |
|
P.A. Now (θ) |
124° |
|
| Sep first |
0.3 |
|
Sep last |
0.36 |
|
Sep. Now (ρ) |
0.36" |
|
| Mag pri |
9.89 |
|
Mag sec |
10.76 |
|
delta mag (ΔM) |
0.87 |
|
Spectral class |
A5 (white) |
|
| Pri motion ra |
+006 |
|
Sec motion ra |
|
|
| Pri motion dec |
+004 |
|
Sec motion dec |
|
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
21056+6030 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 239570 |
19186 |
21 05 34 +60 29 34 |
A 758 AB |
2008 |
17 |
124 |
0.4 |
9.89 |
10.76 |
0.87 |
Y |
<=== |
| Show |
|
19186 |
21 05 34 +60 29 34 |
A 758 AB,C |
2014 |
8 |
189 |
8.6 |
9.45 |
14.00 |
4.55 |
|
|
Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 239570 |
|
Constellation |
Cepheus |
|
SAO |
19186 |
|
HIP |
104113 |
|
| Tycho2 |
4247-01298-1 |
|
Gaia DR2 |
2192468383843943168 |
|
HD |
239570 |
|
ADS |
14635 |
|
| BD |
BD+59 2315 |
|
Distance |
290.7 |
|
Distance ly |
948.26 |
|
ORBITAL ELEMENTS
| Period (P) | 270y | |
Periastron (T) | 2015y | |
Semi-major axis (a) | 0.304a | |
| Eccentricity (e) | 0.19 | |
Inclination (i) | 51° | |
Longitude of periastron (ω) | 45° | |
| Node (Ω) | 115.8° | |
Notes | | |
Reference | Hei1998 | |
| Equinox | | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
125.7 |
0.246 |
| 2001 |
127.0 |
0.244 |
| 2002 |
128.3 |
0.242 |
| 2003 |
129.6 |
0.239 |
| 2004 |
130.9 |
0.237 |
| 2005 |
132.3 |
0.235 |
| 2006 |
133.7 |
0.232 |
| 2007 |
135.1 |
0.229 |
| 2008 |
136.6 |
0.227 |
| 2009 |
138.1 |
0.224 |
| 2010 |
139.6 |
0.221 |
| 2011 |
141.2 |
0.218 |
| 2012 |
142.8 |
0.215 |
| 2013 |
144.5 |
0.212 |
| 2014 |
146.2 |
0.209 |
| 2015 |
148.0 |
0.206 |
| 2016 |
149.8 |
0.203 |
| 2017 |
151.7 |
0.200 |
| 2018 |
153.6 |
0.196 |
| 2019 |
155.6 |
0.193 |
| 2020 |
157.7 |
0.190 |
| 2021 |
159.8 |
0.187 |
| 2022 |
162.0 |
0.185 |
| 2023 |
164.3 |
0.182 |
| 2024 |
166.6 |
0.179 |
| 2025 |
169.0 |
0.177 |
| 2026 |
171.5 |
0.174 |
| 2027 |
174.1 |
0.172 |
| 2028 |
176.7 |
0.170 |
| 2029 |
179.3 |
0.168 |
| 2030 |
182.0 |
0.167 |
|
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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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