19162+2757 HO 447
19h 16m 09.06s +27° 55' 25.3" P.A. 171.00 sep 2.4 mag 9.50,9.50
| Coord 2000 |
19162+2757 |
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Discov num |
HO 447 |
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Comp |
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Coord arcsec 2000 |
19 16 09.06 +27 55 25.3 |
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| Date first |
1893 |
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Date last |
2020 |
|
Obs |
26 |
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| Pa first |
181 |
|
Pa last |
170.7 |
|
P.A. Now (θ) |
170.7° |
|
| Sep first |
1.1 |
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Sep last |
2.434 |
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Sep. Now (ρ) |
2.434" |
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| Mag pri |
9.50 |
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Mag sec |
9.50 |
|
delta mag (ΔM) |
0 |
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Spectral class |
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| Pri motion ra |
-007 |
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Sec motion ra |
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| Pri motion dec |
-035 |
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Sec motion dec |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Lyra |
|
Gaia DR2 |
2037972324242127872 |
|
ADS |
12247 |
|
ORBITAL ELEMENTS
| Period (P) | 916.7131y | ± 462.1604 |
Periastron (T) | 1858.5501y | ± 32.1978 |
Semi-major axis (a) | 3.71685a | ± 1.94567 |
| Eccentricity (e) | 0.7538 | ± 0.20141 |
Inclination (i) | 92.613° | ± 1.707 |
Longitude of periastron (ω) | 270.186° | ± 17.699 |
| Node (Ω) | 175.475° | ± 2.988 |
Notes | | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
171.8 |
2.411 |
| 2001 |
171.8 |
2.409 |
| 2002 |
171.8 |
2.406 |
| 2003 |
171.8 |
2.404 |
| 2004 |
171.7 |
2.401 |
| 2005 |
171.7 |
2.399 |
| 2006 |
171.7 |
2.396 |
| 2007 |
171.7 |
2.394 |
| 2008 |
171.6 |
2.391 |
| 2009 |
171.6 |
2.388 |
| 2010 |
171.6 |
2.385 |
| 2011 |
171.5 |
2.382 |
| 2012 |
171.5 |
2.379 |
| 2013 |
171.5 |
2.376 |
| 2014 |
171.5 |
2.373 |
| 2015 |
171.4 |
2.369 |
| 2016 |
171.4 |
2.366 |
| 2017 |
171.4 |
2.363 |
| 2018 |
171.3 |
2.359 |
| 2019 |
171.3 |
2.356 |
| 2020 |
171.3 |
2.352 |
| 2021 |
171.2 |
2.348 |
| 2022 |
171.2 |
2.345 |
| 2023 |
171.2 |
2.341 |
| 2024 |
171.2 |
2.337 |
| 2025 |
171.1 |
2.333 |
| 2026 |
171.1 |
2.329 |
| 2027 |
171.1 |
2.325 |
| 2028 |
171.0 |
2.321 |
| 2029 |
171.0 |
2.317 |
| 2030 |
171.0 |
2.313 |
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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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