21567+6338 WRH 36 (VV Cep)
21h 56m 39.14s +63° 37' 32.0" P.A. 175.00 sep 0.1 mag 5.40, Sp M2Iab+B1V dist. 751.88 pc (2452.63 l.y.)
| Coord 2000 |
21567+6338 |
|
Discov num |
WRH 36 |
|
Comp |
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Coord arcsec 2000 |
21 56 39.14 +63 37 32.0 |
|
| Date first |
1950 |
|
Date last |
1950 |
|
Obs |
1 |
|
| Pa first |
175 |
|
Pa last |
174.5 |
|
P.A. Now (θ) |
174.5° |
|
| Sep first |
0.1 |
|
Sep last |
0.05 |
|
Sep. Now (ρ) |
0.05" |
|
| Mag pri |
5.40 |
|
Mag sec |
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|
delta mag (ΔM) |
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Spectral class |
M2Iab+B1V (red/blue-white) |
|
| Pri motion ra |
-005 |
|
Sec motion ra |
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|
| Pri motion dec |
-004 |
|
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
| Var name |
VV Cep |
|
Constellation |
Cepheus |
|
SAO |
19753 |
|
HIP |
108317 |
|
| Tycho2 |
4266-03252-1 |
|
Gaia DR2 |
2216536246703152256 |
|
HD |
208816 |
|
HR |
8383 |
|
| GC |
30731 |
|
BD |
BD+62 2007 |
|
FK5 |
3756 |
|
Distance |
751.88 |
|
| Distance ly |
2452.63 |
|
ORBITAL ELEMENTS
| Period (P) | 20.34y | |
Periastron (T) | 1951.2y | |
Semi-major axis (a) | 0.0336a | |
| Eccentricity (e) | 0.5 | |
Inclination (i) | 90.65° | |
Longitude of periastron (ω) | 122° | |
| Node (Ω) | 310.6° | |
Notes | n | |
Reference | Frd1960 | |
| Equinox | | |
Last observation | 1958 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
312.6 |
0.015 |
| 2001 |
312.0 |
0.021 |
| 2002 |
311.7 |
0.026 |
| 2003 |
311.4 |
0.031 |
| 2004 |
311.2 |
0.035 |
| 2005 |
311.1 |
0.038 |
| 2006 |
311.0 |
0.039 |
| 2007 |
310.8 |
0.039 |
| 2008 |
310.7 |
0.037 |
| 2009 |
310.5 |
0.032 |
| 2010 |
310.3 |
0.024 |
| 2011 |
309.6 |
0.011 |
| 2012 |
132.5 |
0.005 |
| 2013 |
130.8 |
0.018 |
| 2014 |
130.3 |
0.022 |
| 2015 |
129.8 |
0.019 |
| 2016 |
129.1 |
0.014 |
| 2017 |
127.3 |
0.008 |
| 2018 |
99.0 |
0.001 |
| 2019 |
315.5 |
0.006 |
| 2020 |
313.0 |
0.013 |
| 2021 |
312.2 |
0.019 |
| 2022 |
311.8 |
0.025 |
| 2023 |
311.5 |
0.030 |
| 2024 |
311.3 |
0.034 |
| 2025 |
311.1 |
0.037 |
| 2026 |
311.0 |
0.039 |
| 2027 |
310.9 |
0.039 |
| 2028 |
310.7 |
0.038 |
| 2029 |
310.6 |
0.034 |
| 2030 |
310.4 |
0.027 |
|
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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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