19019+1910 STF 2437 (HD 176972)
19h 01m 53.16s +19° 10' 11.7" P.A. 334.00 sep 0.6 mag 8.41,8.83 Sp G3.4V+G1V dist. 84.39 pc (275.28 l.y.)
| Coord 2000 |
19019+1910 |
|
Discov num |
STF2437 |
|
Comp |
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Coord arcsec 2000 |
19 01 53.16 +19 10 11.7 |
|
| Date first |
1828 |
|
Date last |
2021 |
|
Obs |
169 |
|
| Pa first |
81 |
|
Pa last |
334.2 |
|
P.A. Now (θ) |
334.2° |
|
| Sep first |
1.1 |
|
Sep last |
0.571 |
|
Sep. Now (ρ) |
0.571" |
|
| Mag pri |
8.41 |
|
Mag sec |
8.83 |
|
delta mag (ΔM) |
0.42 |
|
Spectral class |
G3.4V+G1V (yellow/yellow) |
|
| Pri motion ra |
-023 |
|
Sec motion ra |
-023 |
|
| Pri motion dec |
+018 |
|
Sec motion dec |
+018 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 176972 |
|
Constellation |
Sagitta |
|
HIP |
93448 |
|
Tycho2 |
1593-00698-1 |
|
| HD |
176972 |
|
ADS |
11956 |
|
BD |
BD+18 3920 |
|
Distance |
84.39 |
|
| Distance ly |
275.28 |
|
ORBITAL ELEMENTS
| Period (P) | 804.6y | |
Periastron (T) | 2132.947y | |
Semi-major axis (a) | 0.91a | |
| Eccentricity (e) | 0.478 | |
Inclination (i) | 131° | |
Longitude of periastron (ω) | 212.1° | |
| Node (Ω) | 114.9° | |
Notes | n | |
Reference | Sca2008c | |
| Equinox | 2000 | |
Last observation | 2005 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
15.2 |
0.586 |
| 2001 |
14.6 |
0.584 |
| 2002 |
14.0 |
0.583 |
| 2003 |
13.4 |
0.581 |
| 2004 |
12.7 |
0.579 |
| 2005 |
12.1 |
0.578 |
| 2006 |
11.5 |
0.576 |
| 2007 |
10.8 |
0.575 |
| 2008 |
10.2 |
0.573 |
| 2009 |
9.5 |
0.572 |
| 2010 |
8.9 |
0.571 |
| 2011 |
8.2 |
0.569 |
| 2012 |
7.5 |
0.568 |
| 2013 |
6.9 |
0.567 |
| 2014 |
6.2 |
0.565 |
| 2015 |
5.5 |
0.564 |
| 2016 |
4.9 |
0.563 |
| 2017 |
4.2 |
0.562 |
| 2018 |
3.5 |
0.561 |
| 2019 |
2.8 |
0.559 |
| 2020 |
2.1 |
0.558 |
| 2021 |
1.5 |
0.557 |
| 2022 |
0.8 |
0.556 |
| 2023 |
0.1 |
0.555 |
| 2024 |
359.4 |
0.554 |
| 2025 |
358.7 |
0.553 |
| 2026 |
358.0 |
0.553 |
| 2027 |
357.3 |
0.552 |
| 2028 |
356.6 |
0.551 |
| 2029 |
355.9 |
0.550 |
| 2030 |
355.2 |
0.549 |
|
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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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