21118+5959 MCA 67 Aa,Ab
21h 11m 48.24s +59° 59' 11.8" P.A. 305.00 sep 0.0 mag 6.50,7.10 Sp B0II dist. 1315.79 pc (4292.11 l.y.)
| Coord 2000 |
21118+5959 |
|
Discov num |
MCA 67 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
21 11 48.24 +59 59 11.8 |
|
| Date first |
1979 |
|
Date last |
2005 |
|
Obs |
23 |
|
| Pa first |
48 |
|
Pa last |
304.5 |
|
P.A. Now (θ) |
80.9° |
|
| Sep first |
0.1 |
|
Sep last |
0.045 |
|
Sep. Now (ρ) |
0.063" |
|
| Mag pri |
6.50 |
|
Mag sec |
7.10 |
|
delta mag (ΔM) |
0.6 |
|
Spectral class |
B0II (blue-white) |
|
| Pri motion ra |
-007 |
|
Sec motion ra |
|
|
| Pri motion dec |
+002 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
21118+5959 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
33210 |
21 11 48 +59 59 12 |
MCA 67 Aa,Ab |
2005 |
23 |
305 |
0.0 |
6.50 |
7.10 |
0.60 |
Y |
<=== |
| Show |
NSV13598 |
33210 |
21 11 48 +59 59 12 |
STF 2780 AB |
2019 |
127 |
211 |
1.0 |
6.09 |
6.77 |
0.68 |
|
|
| Show |
|
33210 |
21 11 48 +59 59 12 |
STF 2780 AC |
2017 |
18 |
211 |
118.8 |
6.09 |
8.90 |
2.81 |
|
|
| Show |
|
33210 |
21 11 48 +59 59 12 |
WAL 137 AB,D |
2003 |
3 |
260 |
96.3 |
5.72 |
14.20 |
8.48 |
|
|
| Show |
|
33210 |
21 11 48 +59 59 12 |
WAL 137 AB,E |
2017 |
12 |
46 |
61.5 |
6.09 |
10.30 |
4.21 |
|
|
Septuple system
6 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Var name |
NSV13598 |
|
Constellation |
Cepheus |
|
SAO |
33210 |
|
HIP |
104642 |
|
| Tycho2 |
3965-00880-1 |
|
Gaia DR2 |
2192287033139966848 |
|
HD |
202214 |
|
HR |
8119 |
|
| ADS |
14749 |
|
BD |
BD+59 2334 |
|
Distance |
1315.79 |
|
Distance ly |
4292.11 |
|
ORBITAL ELEMENTS
| Period (P) | 56.93y | |
Periastron (T) | 2001.45y | |
Semi-major axis (a) | 0.066a | |
| Eccentricity (e) | 0.792 | |
Inclination (i) | 120.5° | |
Longitude of periastron (ω) | 262.8° | |
| Node (Ω) | 141.8° | |
Notes | n | |
Reference | Zir2012 | |
| Equinox | 2000 | |
Last observation | 2005 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
323.7 |
0.023 |
| 2001 |
294.7 |
0.012 |
| 2002 |
175.3 |
0.011 |
| 2003 |
145.7 |
0.024 |
| 2004 |
135.3 |
0.033 |
| 2005 |
128.8 |
0.039 |
| 2006 |
123.9 |
0.044 |
| 2007 |
119.9 |
0.048 |
| 2008 |
116.4 |
0.051 |
| 2009 |
113.2 |
0.053 |
| 2010 |
110.4 |
0.055 |
| 2011 |
107.7 |
0.057 |
| 2012 |
105.1 |
0.059 |
| 2013 |
102.7 |
0.060 |
| 2014 |
100.3 |
0.061 |
| 2015 |
98.1 |
0.062 |
| 2016 |
95.8 |
0.062 |
| 2017 |
93.6 |
0.063 |
| 2018 |
91.5 |
0.063 |
| 2019 |
89.3 |
0.063 |
| 2020 |
87.2 |
0.063 |
| 2021 |
85.1 |
0.063 |
| 2022 |
83.0 |
0.063 |
| 2023 |
80.9 |
0.063 |
| 2024 |
78.7 |
0.063 |
| 2025 |
76.6 |
0.063 |
| 2026 |
74.4 |
0.063 |
| 2027 |
72.3 |
0.063 |
| 2028 |
70.1 |
0.062 |
| 2029 |
67.8 |
0.062 |
| 2030 |
65.6 |
0.061 |
|
|
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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