18339+5221 A 1377 AB
18h 33m 56.69s +52° 21' 12.6" P.A. 134.00 sep 0.2 mag 6.20,6.40 Sp G9III dist. 195.69 pc (638.34 l.y.)
| Coord 2000 |
18339+5221 |
|
Discov num |
A 1377 |
|
Comp |
AB |
|
Coord arcsec 2000 |
18 33 56.69 +52 21 12.6 |
|
| Date first |
1906 |
|
Date last |
2016 |
|
Obs |
202 |
|
| Pa first |
269 |
|
Pa last |
134.4 |
|
P.A. Now (θ) |
140° |
|
| Sep first |
0.2 |
|
Sep last |
0.244 |
|
Sep. Now (ρ) |
0.24" |
|
| Mag pri |
6.20 |
|
Mag sec |
6.40 |
|
delta mag (ΔM) |
0.2 |
|
Spectral class |
G9III (yellow) |
|
| Pri motion ra |
-008 |
|
Sec motion ra |
|
|
| Pri motion dec |
+002 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
18339+5221 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
31051 |
18 33 57 +52 21 13 |
A 1377 AB |
2016 |
202 |
134 |
0.2 |
6.20 |
6.40 |
0.20 |
Y |
<=== |
| Show |
HD 171779 |
31051 |
18 33 57 +52 21 13 |
STF 2348 AB,C |
2012 |
63 |
271 |
25.7 |
5.50 |
8.65 |
3.15 |
|
|
| Show |
|
31051 |
18 33 57 +52 21 13 |
SLE 216 AB,D |
2005 |
4 |
338 |
93.7 |
5.50 |
11.20 |
5.70 |
|
|
| Show |
|
31051 |
18 33 57 +52 21 13 |
SLE 216 AB,E |
2005 |
3 |
232 |
109.1 |
5.50 |
12.20 |
6.70 |
|
|
Quintuple system
6 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Draco |
|
SAO |
31051 |
|
HIP |
91013 |
|
Tycho2 |
3539-02620-1 |
|
| HD |
171779 |
|
HR |
6983 |
|
GC |
25396 |
|
ADS |
11468 |
|
| BD |
BD+52 2238 |
|
Distance |
195.69 |
|
Distance ly |
638.34 |
|
ORBITAL ELEMENTS
| Period (P) | 205.891y | ± 6.746 |
Periastron (T) | 21156m (1916.8y) | ± 295 |
Semi-major axis (a) | 0.2524a | ± 0.0072 |
| Eccentricity (e) | 0.4161 | ± 0.0083 |
Inclination (i) | 48° | ± 1.4 |
Longitude of periastron (ω) | 262.4° | ± 2.9 |
| Node (Ω) | 57.5° | ± 1.3 |
Notes | n | |
Reference | Mut2010e | |
| Equinox | 2000 | |
Last observation | 2008 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
114.4 |
0.255 |
| 2001 |
115.5 |
0.254 |
| 2002 |
116.5 |
0.253 |
| 2003 |
117.6 |
0.253 |
| 2004 |
118.7 |
0.252 |
| 2005 |
119.7 |
0.251 |
| 2006 |
120.8 |
0.250 |
| 2007 |
121.9 |
0.250 |
| 2008 |
123.0 |
0.249 |
| 2009 |
124.1 |
0.248 |
| 2010 |
125.2 |
0.248 |
| 2011 |
126.3 |
0.247 |
| 2012 |
127.4 |
0.246 |
| 2013 |
128.5 |
0.246 |
| 2014 |
129.6 |
0.245 |
| 2015 |
130.8 |
0.244 |
| 2016 |
131.9 |
0.244 |
| 2017 |
133.1 |
0.243 |
| 2018 |
134.2 |
0.243 |
| 2019 |
135.4 |
0.242 |
| 2020 |
136.5 |
0.242 |
| 2021 |
137.7 |
0.241 |
| 2022 |
138.9 |
0.241 |
| 2023 |
140.0 |
0.240 |
| 2024 |
141.2 |
0.240 |
| 2025 |
142.4 |
0.239 |
| 2026 |
143.6 |
0.239 |
| 2027 |
144.8 |
0.238 |
| 2028 |
146.0 |
0.238 |
| 2029 |
147.2 |
0.238 |
| 2030 |
148.4 |
0.237 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
SUSPECTED ORBITAL ELEMENTS
| Identifier | 18339+5221 A 1377 B |
| coord_arcsec_2000 | 183356.69+522112.6 |
| Period (P) | 2324d (6.36y) | ± 250 |
Periastron (T) | 53375m (2005.013y) | ± 21 |
Semi-major axis (a) | 0.16m | ± 0.048 |
| Eccentricity (e) | 0 | |
Inclination (i) | 66° | ± 21 |
Longitude of periastron (ω) | 0° | |
| Node (Ω) | 157° | ± 33 |
Notes | n | |
Reference | Mut2010e | |
| Equinox | 2000 | |
Last observation | 2008 | |
Grade | 9 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
216.2 |
|
| 2001-01-01 |
313.4 |
|
| 2002-01-01 |
340.9 |
|
| 2003-01-01 |
19.6 |
|
| 2004-01-01 |
124.6 |
|
| 2005-01-01 |
156.7 |
|
| 2006-01-01 |
187.9 |
|
| 2007-01-01 |
292.4 |
|
| 2008-01-01 |
332.5 |
|
| 2009-01-01 |
359.5 |
|
| 2010-01-01 |
94.9 |
|
| 2011-01-01 |
148.0 |
|
| 2012-01-01 |
173.1 |
|
| 2013-01-01 |
251.6 |
|
| 2014-01-01 |
323.0 |
|
| 2015-01-01 |
347.8 |
|
| 2016-01-01 |
47.1 |
|
| 2017-01-01 |
137.0 |
|
| 2018-01-01 |
163.1 |
|
| 2019-01-01 |
207.3 |
|
| 2020-01-01 |
309.4 |
|
| 2021-01-01 |
338.8 |
|
| 2022-01-01 |
13.4 |
|
| 2023-01-01 |
119.2 |
|
| 2024-01-01 |
154.7 |
|
| 2025-01-01 |
183.5 |
|
| 2026-01-01 |
284.6 |
|
| 2027-01-01 |
330.3 |
|
| 2028-01-01 |
356.2 |
|
| 2029-01-01 |
84.1 |
|
| 2030-01-01 |
145.6 |
|
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
