22038+6438 MCA 69 Aa,Ab
22h 03m 47.45s +64° 37' 40.7" P.A. 102.00 sep 0.1 mag 4.80,6.30 Sp A3m dist. 29.59 pc (96.52 l.y.)
| Coord 2000 |
22038+6438 |
|
Discov num |
MCA 69 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
22 03 47.45 +64 37 40.7 |
|
| Date first |
1975 |
|
Date last |
2020 |
|
Obs |
55 |
|
| Pa first |
97 |
|
Pa last |
102.1 |
|
P.A. Now (θ) |
102.1° |
|
| Sep first |
0.1 |
|
Sep last |
0.065 |
|
Sep. Now (ρ) |
0.065" |
|
| Mag pri |
4.80 |
|
Mag sec |
6.30 |
|
delta mag (ΔM) |
1.5 |
|
Spectral class |
A3m (white) |
|
| Pri motion ra |
+215 |
|
Sec motion ra |
|
|
| Pri motion dec |
+089 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
22038+6438 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
19827 |
22 03 47 +64 37 41 |
MCA 69 Aa,Ab |
2020 |
55 |
102 |
0.1 |
4.80 |
6.30 |
1.50 |
Y |
<=== |
| Show |
Kurhah |
19827 |
22 03 47 +64 37 41 |
STF 2863 AB |
2022 |
329 |
275 |
7.9 |
4.45 |
6.40 |
1.95 |
Y |
|
| Show |
|
19827 |
22 03 47 +64 37 41 |
STF 2863 AC |
2014 |
6 |
208 |
112.7 |
4.45 |
12.60 |
8.15 |
|
|
Quadruple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Common name |
Kurhah |
|
Constellation |
Cepheus |
|
SAO |
19827 |
|
HIP |
108917 |
|
| Tycho2 |
4271-02620-1 |
|
Gaia DR2 |
2218144110659419264 |
|
HD |
209790 |
|
HR |
8417 |
|
| GC |
30877 |
|
ADS |
15600 |
|
BD |
BD+63 1802 |
|
Bayer |
Xi Cephei |
|
| Bayer name |
Xi Cep |
|
Flamsteed |
17 Cephei |
|
Flamsteed name |
17 Cep |
|
Distance |
29.59 |
|
| Distance ly |
96.52 |
|
Bayer greek |
ξ Cep |
|
| Other names |
Alkurhah, Alkirhad, Al Kirdah |
|
| Meaning |
glow, eyebrow horse |
|
ORBITAL ELEMENTS
| Period (P) | 2.2428y | ± 0.0044 |
Periastron (T) | 1991.2127y | ± 0.0437 |
Semi-major axis (a) | 0.07996a | ± 0.00564 |
| Eccentricity (e) | 0.60333 | ± 0.05273 |
Inclination (i) | 74.479° | ± 1.859 |
Longitude of periastron (ω) | 270.421° | ± 1.505 |
| Node (Ω) | 88.341° | ± 1.083 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2012 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
266.4 |
0.055 |
| 2001 |
132.6 |
0.045 |
| 2002 |
252.9 |
0.065 |
| 2003 |
112.6 |
0.059 |
| 2004 |
238.4 |
0.055 |
| 2005 |
99.2 |
0.065 |
| 2006 |
214.4 |
0.041 |
| 2007 |
80.1 |
0.035 |
| 2008 |
173.7 |
0.034 |
| 2009 |
268.7 |
0.050 |
| 2010 |
135.9 |
0.043 |
| 2011 |
254.4 |
0.066 |
| 2012 |
114.5 |
0.057 |
| 2013 |
240.4 |
0.056 |
| 2014 |
100.7 |
0.065 |
| 2015 |
218.1 |
0.042 |
| 2016 |
84.3 |
0.043 |
| 2017 |
179.0 |
0.034 |
| 2018 |
271.5 |
0.045 |
| 2019 |
139.4 |
0.042 |
| 2020 |
255.9 |
0.066 |
| 2021 |
116.4 |
0.056 |
| 2022 |
242.4 |
0.058 |
| 2023 |
102.2 |
0.065 |
| 2024 |
221.5 |
0.044 |
| 2025 |
87.4 |
0.049 |
| 2026 |
184.3 |
0.034 |
| 2027 |
275.2 |
0.038 |
| 2028 |
143.2 |
0.040 |
| 2029 |
257.3 |
0.065 |
| 2030 |
118.5 |
0.054 |
|
|
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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