18512+5923 CIA 8 Aa,Ab
18h 51m 12.01s +59° 23' 17.8" P.A. 202.00 sep 0.0 mag 4.77,11.00 Sp G7III-IV dist. 104.82 pc (341.92 l.y.)
| Coord 2000 |
18512+5923 |
|
Discov num |
CIA 8 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
18 51 12.01 +59 23 17.8 |
|
| Date first |
2012 |
|
Date last |
2014 |
|
Obs |
6 |
|
| Pa first |
23 |
|
Pa last |
202 |
|
P.A. Now (θ) |
202° |
|
| Sep first |
0.0 |
|
Sep last |
0.006 |
|
Sep. Now (ρ) |
0.006" |
|
| Mag pri |
4.77 |
|
Mag sec |
11.00 |
|
delta mag (ΔM) |
6.23 |
|
Spectral class |
G7III-IV (yellow) |
|
| Pri motion ra |
+078 |
|
Sec motion ra |
|
|
| Pri motion dec |
+025 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
18512+5923 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
31218 |
18 51 12 +59 23 18 |
CIA 8 Aa,Ab |
2014 |
6 |
202 |
0.0 |
4.77 |
11.00 |
6.23 |
Y |
<=== |
| Show |
Omi Dra |
31218 |
18 51 12 +59 23 18 |
STF 2420 AB |
2019 |
94 |
316 |
37.6 |
4.77 |
8.26 |
3.49 |
|
|
| Show |
|
31218 |
18 51 12 +59 23 18 |
STF 2420 AC |
2014 |
4 |
324 |
141.3 |
4.77 |
12.67 |
7.90 |
|
|
| Show |
|
|
18 51 09 +59 23 46 |
STF 2420 BC |
2015 |
9 |
326 |
103.5 |
8.26 |
12.67 |
4.41 |
|
|
Quadruple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Draco |
|
SAO |
31218 |
|
HIP |
92512 |
|
Tycho2 |
3930-01790-1 |
|
| Gaia DR2 |
2156134953382133632 |
|
HD |
175306 |
|
HR |
7125 |
|
GC |
25905 |
|
| ADS |
11779 |
|
BD |
BD+59 1925 |
|
Bayer |
Omicron Draconis |
|
Bayer name |
Omi Dra |
|
| Flamsteed |
47 Draconis |
|
Flamsteed name |
47 Dra |
|
FK5 |
707 |
|
Distance |
104.82 |
|
| Distance ly |
341.92 |
|
Bayer greek |
ο Dra |
|
ORBITAL ELEMENTS
| Period (P) | 138.444d | ± 0.003 |
Periastron (T) | 54983d (2009.414y) | ± 0.2 |
Semi-major axis (a) | 6.51m | ± 0.03 |
| Eccentricity (e) | 0.158 | ± 0.003 |
Inclination (i) | 89.6° | ± 0.3 |
Longitude of periastron (ω) | 293° | ± 0.6 |
| Node (Ω) | 22.9° | ± 0.2 |
Notes | n | |
Reference | CIA2015c | |
| Equinox | 2000 | |
Last observation | 2012 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
23.0 |
0.006 |
| 2001-01-01 |
203.1 |
0.006 |
| 2002-01-01 |
199.7 |
0.001 |
| 2003-01-01 |
22.7 |
0.005 |
| 2004-01-01 |
202.9 |
0.007 |
| 2005-01-01 |
24.2 |
0.002 |
| 2006-01-01 |
21.8 |
0.002 |
| 2007-01-01 |
202.7 |
0.006 |
| 2008-01-01 |
23.3 |
0.005 |
| 2009-01-01 |
203.9 |
0.002 |
| 2010-01-01 |
202.3 |
0.004 |
| 2011-01-01 |
23.0 |
0.006 |
| 2012-01-01 |
203.1 |
0.005 |
| 2013-01-01 |
201.1 |
0.002 |
| 2014-01-01 |
22.8 |
0.005 |
| 2015-01-01 |
202.9 |
0.007 |
| 2016-01-01 |
25.0 |
0.001 |
| 2017-01-01 |
22.2 |
0.003 |
| 2018-01-01 |
202.7 |
0.006 |
| 2019-01-01 |
23.4 |
0.004 |
| 2020-01-01 |
204.7 |
0.001 |
| 2021-01-01 |
202.4 |
0.005 |
| 2022-01-01 |
23.1 |
0.006 |
| 2023-01-01 |
203.2 |
0.005 |
| 2024-01-01 |
201.7 |
0.002 |
| 2025-01-01 |
22.8 |
0.006 |
| 2026-01-01 |
203.0 |
0.007 |
| 2027-01-01 |
27.3 |
0.001 |
| 2028-01-01 |
22.4 |
0.004 |
| 2029-01-01 |
202.8 |
0.007 |
| 2030-01-01 |
23.6 |
0.004 |
|
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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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