19098-1948 B 427 (HD 178555)
19h 09m 48.13s -19° 48' 12.4" P.A. 183.00 sep 0.1 mag 7.00,7.10 Sp K2IV dist. 118.48 pc (386.48 l.y.)
| Coord 2000 |
19098-1948 |
|
Discov num |
B 427 |
|
Comp |
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Coord arcsec 2000 |
19 09 48.13 -19 48 12.4 |
|
| Date first |
1925 |
|
Date last |
2007 |
|
Obs |
19 |
|
| Pa first |
276 |
|
Pa last |
182.9 |
|
P.A. Now (θ) |
182.9° |
|
| Sep first |
0.1 |
|
Sep last |
0.05 |
|
Sep. Now (ρ) |
0.05" |
|
| Mag pri |
7.00 |
|
Mag sec |
7.10 |
|
delta mag (ΔM) |
0.1 |
|
Spectral class |
K2IV (yellow-orange) |
|
| Pri motion ra |
+028 |
|
Sec motion ra |
|
|
| Pri motion dec |
-084 |
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Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 178555 |
|
Constellation |
Sagittarius |
|
SAO |
162260 |
|
HIP |
94144 |
|
| Tycho2 |
6291-01794-1 |
|
Gaia DR2 |
4083941366486236288 |
|
HD |
178555 |
|
HR |
7265 |
|
| GC |
26389 |
|
ADS |
12096 |
|
BD |
BD-20 5415 |
|
Distance |
118.48 |
|
| Distance ly |
386.48 |
|
ORBITAL ELEMENTS
| Period (P) | 2.68y | |
Periastron (T) | 1931.81y | |
Semi-major axis (a) | 0.129a | |
| Eccentricity (e) | 0.53 | |
Inclination (i) | 45.6° | |
Longitude of periastron (ω) | 86.1° | |
| Node (Ω) | 45° | |
Notes | n | |
Reference | Vor1934 | |
| Equinox | | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
299.1 |
0.140 |
| 2001 |
13.8 |
0.120 |
| 2002 |
251.2 |
0.127 |
| 2003 |
321.3 |
0.137 |
| 2004 |
54.9 |
0.079 |
| 2005 |
274.7 |
0.139 |
| 2006 |
344.6 |
0.133 |
| 2007 |
204.5 |
0.072 |
| 2008 |
296.4 |
0.140 |
| 2009 |
10.2 |
0.123 |
| 2010 |
247.8 |
0.124 |
| 2011 |
318.5 |
0.137 |
| 2012 |
47.2 |
0.087 |
| 2013 |
271.9 |
0.138 |
| 2014 |
341.6 |
0.134 |
| 2015 |
192.4 |
0.061 |
| 2016 |
293.7 |
0.140 |
| 2017 |
6.8 |
0.125 |
| 2018 |
244.2 |
0.120 |
| 2019 |
315.7 |
0.138 |
| 2020 |
40.8 |
0.094 |
| 2021 |
269.2 |
0.137 |
| 2022 |
338.6 |
0.134 |
| 2023 |
175.3 |
0.051 |
| 2024 |
291.0 |
0.140 |
| 2025 |
3.4 |
0.126 |
| 2026 |
240.4 |
0.116 |
| 2027 |
312.9 |
0.138 |
| 2028 |
35.2 |
0.101 |
| 2029 |
266.3 |
0.136 |
| 2030 |
335.7 |
0.135 |
|
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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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