22305+6137 HU 981 (HD 213530)
22h 30m 32.63s +61° 37' 25.6" P.A. 215.00 sep 0.3 mag 7.61,7.90 Sp B8V dist. 724.64 pc (2363.78 l.y.)
| Coord 2000 |
22305+6137 |
|
Discov num |
HU 981 |
|
Comp |
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Coord arcsec 2000 |
22 30 32.63 +61 37 25.6 |
|
| Date first |
1904 |
|
Date last |
2008 |
|
Obs |
41 |
|
| Pa first |
254 |
|
Pa last |
214.5 |
|
P.A. Now (θ) |
214.5° |
|
| Sep first |
0.1 |
|
Sep last |
0.316 |
|
Sep. Now (ρ) |
0.316" |
|
| Mag pri |
7.61 |
|
Mag sec |
7.90 |
|
delta mag (ΔM) |
0.29 |
|
Spectral class |
B8V (blue-white) |
|
| Pri motion ra |
+004 |
|
Sec motion ra |
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| Pri motion dec |
+007 |
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Sec motion dec |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 213530 |
|
Constellation |
Cepheus |
|
SAO |
20115 |
|
HIP |
111112 |
|
| Tycho2 |
4264-00037-1 |
|
HD |
213530 |
|
GC |
31463 |
|
ADS |
16011 |
|
| BD |
BD+60 2403 |
|
Distance |
724.64 |
|
Distance ly |
2363.78 |
|
ORBITAL ELEMENTS
| Period (P) | 934y | |
Periastron (T) | 1904.6y | |
Semi-major axis (a) | 0.612a | |
| Eccentricity (e) | 0.65 | |
Inclination (i) | 102° | |
Longitude of periastron (ω) | 116.9° | |
| Node (Ω) | 53° | |
Notes | | |
Reference | Zir2015a | |
| Equinox | 2000 | |
Last observation | 2008 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
217.9 |
0.310 |
| 2001 |
217.7 |
0.309 |
| 2002 |
217.4 |
0.308 |
| 2003 |
217.2 |
0.308 |
| 2004 |
216.9 |
0.307 |
| 2005 |
216.7 |
0.306 |
| 2006 |
216.5 |
0.305 |
| 2007 |
216.2 |
0.304 |
| 2008 |
216.0 |
0.303 |
| 2009 |
215.7 |
0.302 |
| 2010 |
215.5 |
0.301 |
| 2011 |
215.2 |
0.300 |
| 2012 |
214.9 |
0.299 |
| 2013 |
214.7 |
0.298 |
| 2014 |
214.4 |
0.296 |
| 2015 |
214.2 |
0.295 |
| 2016 |
213.9 |
0.294 |
| 2017 |
213.6 |
0.293 |
| 2018 |
213.4 |
0.292 |
| 2019 |
213.1 |
0.291 |
| 2020 |
212.8 |
0.290 |
| 2021 |
212.6 |
0.288 |
| 2022 |
212.3 |
0.287 |
| 2023 |
212.0 |
0.286 |
| 2024 |
211.7 |
0.285 |
| 2025 |
211.5 |
0.284 |
| 2026 |
211.2 |
0.282 |
| 2027 |
210.9 |
0.281 |
| 2028 |
210.6 |
0.280 |
| 2029 |
210.3 |
0.279 |
| 2030 |
210.0 |
0.277 |
|
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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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