19490+1909 AGC 11 AB
19h 48m 58.65s +19° 08' 31.1" P.A. 174.00 sep 0.2 mag 5.64,6.04 Sp A1V dist. 78.19 pc (255.06 l.y.)
| Coord 2000 |
19490+1909 |
|
Discov num |
AGC 11 |
|
Comp |
AB |
|
Coord arcsec 2000 |
19 48 58.65 +19 08 31.1 |
|
| Date first |
1875 |
|
Date last |
2010 |
|
Obs |
261 |
|
| Pa first |
137 |
|
Pa last |
174.3 |
|
P.A. Now (θ) |
141° |
|
| Sep first |
0.4 |
|
Sep last |
0.23 |
|
Sep. Now (ρ) |
0.14" |
|
| Mag pri |
5.64 |
|
Mag sec |
6.04 |
|
delta mag (ΔM) |
0.4 |
|
Spectral class |
A1V (white) |
|
| Pri motion ra |
+019 |
|
Sec motion ra |
|
|
| Pri motion dec |
+027 |
|
Sec motion dec |
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|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
19490+1909 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
105298 |
19 48 59 +19 08 31 |
AGC 11 AB |
2010 |
261 |
174 |
0.2 |
5.64 |
6.04 |
0.40 |
Y |
<=== |
| Show |
Zet Sge |
105298 |
19 48 59 +19 08 31 |
STF 2585 AB,C |
2016 |
131 |
311 |
8.3 |
5.04 |
9.01 |
3.97 |
|
|
| Show |
|
105298 |
19 48 59 +19 08 31 |
STF 2585 AB,D |
2005 |
10 |
246 |
76.0 |
5.04 |
11.00 |
5.96 |
|
|
Quadruple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Sagitta |
|
SAO |
105298 |
|
HIP |
97496 |
|
Tycho2 |
1623-02647-1 |
|
| HD |
187362 |
|
HR |
7546 |
|
GC |
27431 |
|
ADS |
12973 |
|
| BD |
BD+18 4254 |
|
Bayer |
Zeta Sagittae |
|
Bayer name |
Zet Sge |
|
Flamsteed |
8 Sagittae |
|
| Flamsteed name |
8 Sge |
|
Distance |
78.19 |
|
Distance ly |
255.06 |
|
Bayer greek |
ζ Sge |
|
ORBITAL ELEMENTS
| Period (P) | 8487.9d (23.24y) | ± 4.9 |
Periastron (T) | 44199.6m (1979.892y) | ± 5.9 |
Semi-major axis (a) | 0.13605a | ± 0.00044 |
| Eccentricity (e) | 0.7948 | ± 0.0019 |
Inclination (i) | 132.33° | ± 0.41 |
Longitude of periastron (ω) | 355.3° | ± 1 |
| Node (Ω) | 340.97° | ± 0.68 |
Notes | n | |
Reference | Mut2010b | |
| Equinox | 2000 | |
Last observation | 2007 | |
Grade | 1 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
139.5 |
0.133 |
| 2001 |
130.6 |
0.098 |
| 2002 |
109.6 |
0.056 |
| 2003 |
4.5 |
0.027 |
| 2004 |
237.9 |
0.042 |
| 2005 |
204.2 |
0.083 |
| 2006 |
192.3 |
0.118 |
| 2007 |
185.6 |
0.148 |
| 2008 |
181.0 |
0.172 |
| 2009 |
177.5 |
0.192 |
| 2010 |
174.6 |
0.209 |
| 2011 |
172.0 |
0.222 |
| 2012 |
169.8 |
0.232 |
| 2013 |
167.6 |
0.238 |
| 2014 |
165.6 |
0.243 |
| 2015 |
163.6 |
0.244 |
| 2016 |
161.7 |
0.242 |
| 2017 |
159.6 |
0.238 |
| 2018 |
157.5 |
0.231 |
| 2019 |
155.2 |
0.220 |
| 2020 |
152.6 |
0.206 |
| 2021 |
149.6 |
0.189 |
| 2022 |
145.9 |
0.167 |
| 2023 |
141.0 |
0.140 |
| 2024 |
133.3 |
0.107 |
| 2025 |
117.2 |
0.067 |
| 2026 |
44.0 |
0.027 |
| 2027 |
257.7 |
0.034 |
| 2028 |
208.8 |
0.073 |
| 2029 |
194.4 |
0.110 |
| 2030 |
186.9 |
0.141 |
|
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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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