18550+3053 A 258 (HD 175612)
18h 54m 59.91s +30° 52' 45.5" P.A. 228.00 sep 0.3 mag 8.86,9.88 Sp G0
| Coord 2000 |
18550+3053 |
|
Discov num |
A 258 |
|
Comp |
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Coord arcsec 2000 |
18 54 59.91 +30 52 45.5 |
|
| Date first |
1901 |
|
Date last |
2018 |
|
Obs |
32 |
|
| Pa first |
268 |
|
Pa last |
228.1 |
|
P.A. Now (θ) |
228.1° |
|
| Sep first |
0.3 |
|
Sep last |
0.32 |
|
Sep. Now (ρ) |
0.32" |
|
| Mag pri |
8.86 |
|
Mag sec |
9.88 |
|
delta mag (ΔM) |
1.02 |
|
Spectral class |
G0 (yellow) |
|
| Pri motion ra |
+009 |
|
Sec motion ra |
+009 |
|
| Pri motion dec |
-014 |
|
Sec motion dec |
-014 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 175612 |
|
Constellation |
Lyra |
|
SAO |
67567 |
|
Tycho2 |
2639-00389-1 |
|
| Gaia DR2 |
2041919953234272768 |
|
HD |
175612 |
|
ADS |
11837 |
|
ORBITAL ELEMENTS
| Period (P) | 1353y | |
Periastron (T) | 2007y | |
Semi-major axis (a) | 1.52a | |
| Eccentricity (e) | 0.67 | |
Inclination (i) | 97° | |
Longitude of periastron (ω) | 32° | |
| Node (Ω) | 247° | |
Notes | | |
Reference | Hrt2013c | |
| Equinox | 2000 | |
Last observation | 2007 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
244.5 |
0.478 |
| 2001 |
244.3 |
0.472 |
| 2002 |
244.0 |
0.465 |
| 2003 |
243.8 |
0.458 |
| 2004 |
243.5 |
0.450 |
| 2005 |
243.2 |
0.443 |
| 2006 |
242.9 |
0.435 |
| 2007 |
242.6 |
0.427 |
| 2008 |
242.3 |
0.418 |
| 2009 |
242.0 |
0.410 |
| 2010 |
241.7 |
0.401 |
| 2011 |
241.3 |
0.392 |
| 2012 |
240.9 |
0.382 |
| 2013 |
240.6 |
0.373 |
| 2014 |
240.1 |
0.363 |
| 2015 |
239.7 |
0.353 |
| 2016 |
239.3 |
0.343 |
| 2017 |
238.8 |
0.333 |
| 2018 |
238.2 |
0.322 |
| 2019 |
237.7 |
0.312 |
| 2020 |
237.1 |
0.301 |
| 2021 |
236.5 |
0.290 |
| 2022 |
235.8 |
0.279 |
| 2023 |
235.0 |
0.268 |
| 2024 |
234.2 |
0.257 |
| 2025 |
233.4 |
0.246 |
| 2026 |
232.4 |
0.235 |
| 2027 |
231.3 |
0.223 |
| 2028 |
230.2 |
0.212 |
| 2029 |
228.8 |
0.201 |
| 2030 |
227.4 |
0.189 |
|
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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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