19126+1651 BU 139 AB (V338 Sge)
19h 12m 34.45s +16° 50' 47.2" P.A. 135.00 sep 0.6 mag 7.11,7.95 Sp B9IV dist. 242.72 pc (791.75 l.y.)
| Coord 2000 |
19126+1651 |
|
Discov num |
BU 139 |
|
Comp |
AB |
|
Coord arcsec 2000 |
19 12 34.45 +16 50 47.2 |
|
| Date first |
1873 |
|
Date last |
2017 |
|
Obs |
115 |
|
| Pa first |
130 |
|
Pa last |
135.4 |
|
P.A. Now (θ) |
135.4° |
|
| Sep first |
0.5 |
|
Sep last |
0.597 |
|
Sep. Now (ρ) |
0.597" |
|
| Mag pri |
7.11 |
|
Mag sec |
7.95 |
|
delta mag (ΔM) |
0.84 |
|
Spectral class |
B9IV (blue-white) |
|
| Pri motion ra |
+001 |
|
Sec motion ra |
+001 |
|
| Pri motion dec |
-010 |
|
Sec motion dec |
-010 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
19126+1651 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
V338 Sge |
104602 |
19 12 34 +16 50 47 |
BU 139 AB |
2017 |
115 |
135 |
0.6 |
7.11 |
7.95 |
0.84 |
Y |
<=== |
| Show |
|
104602 |
19 12 34 +16 50 47 |
STTA 177 AC |
2017 |
38 |
276 |
98.4 |
7.11 |
8.02 |
0.91 |
|
|
| Show |
|
104602 |
19 12 34 +16 50 47 |
BU 139 AE |
2015 |
11 |
101 |
28.8 |
7.11 |
11.19 |
4.08 |
|
|
| Show |
|
104594 |
19 12 28 +16 51 00 |
WSI 107 Ca,Cb |
2008 |
1 |
253 |
0.1 |
8.10 |
11.10 |
3.00 |
|
|
| Show |
|
104594 |
19 12 28 +16 51 00 |
BU 139 CD |
2015 |
16 |
269 |
138.9 |
8.02 |
11.19 |
3.17 |
|
|
Sextuple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Var name |
V338 Sge |
|
Constellation |
Sagitta |
|
SAO |
104602 |
|
HIP |
94377 |
|
| Tycho2 |
1599-00546-1 |
|
Gaia DR2 |
4513495786115703040 |
|
HD |
179588 |
|
HR |
7285 |
|
| GC |
26467 |
|
ADS |
12160 |
|
BD |
BD+16 3775 |
|
Distance |
242.72 |
|
| Distance ly |
791.75 |
|
ORBITAL ELEMENTS
| Period (P) | 587y | |
Periastron (T) | 2128.7y | |
Semi-major axis (a) | 0.552a | |
| Eccentricity (e) | 0.533 | |
Inclination (i) | 95.4° | |
Longitude of periastron (ω) | 133.8° | |
| Node (Ω) | 136.4° | |
Notes | n | |
Reference | Zir2013a | |
| Equinox | 2000 | |
Last observation | 2009 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
136.6 |
0.642 |
| 2001 |
136.6 |
0.640 |
| 2002 |
136.6 |
0.637 |
| 2003 |
136.5 |
0.635 |
| 2004 |
136.5 |
0.632 |
| 2005 |
136.4 |
0.630 |
| 2006 |
136.4 |
0.627 |
| 2007 |
136.4 |
0.624 |
| 2008 |
136.3 |
0.622 |
| 2009 |
136.3 |
0.619 |
| 2010 |
136.3 |
0.616 |
| 2011 |
136.2 |
0.613 |
| 2012 |
136.2 |
0.610 |
| 2013 |
136.1 |
0.607 |
| 2014 |
136.1 |
0.604 |
| 2015 |
136.1 |
0.601 |
| 2016 |
136.0 |
0.598 |
| 2017 |
136.0 |
0.595 |
| 2018 |
135.9 |
0.591 |
| 2019 |
135.9 |
0.588 |
| 2020 |
135.8 |
0.585 |
| 2021 |
135.8 |
0.581 |
| 2022 |
135.8 |
0.578 |
| 2023 |
135.7 |
0.574 |
| 2024 |
135.7 |
0.571 |
| 2025 |
135.6 |
0.567 |
| 2026 |
135.6 |
0.563 |
| 2027 |
135.5 |
0.560 |
| 2028 |
135.5 |
0.556 |
| 2029 |
135.4 |
0.552 |
| 2030 |
135.4 |
0.548 |
|
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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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