19581-4808 HDS 2842 (HD 188581)
19h 58m 04.28s -48° 08' 01.2" P.A. 76.00 sep 0.3 mag 8.61,10.78 Sp G0V dist. 53.79 pc (175.46 l.y.)
| Coord 2000 |
19581-4808 |
|
Discov num |
HDS2842 |
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Comp |
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Coord arcsec 2000 |
19 58 04.28 -48 08 01.2 |
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| Date first |
1991 |
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Date last |
2021 |
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Obs |
14 |
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| Pa first |
92 |
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Pa last |
76.4 |
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P.A. Now (θ) |
76.4° |
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| Sep first |
0.3 |
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Sep last |
0.253 |
|
Sep. Now (ρ) |
0.253" |
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| Mag pri |
8.61 |
|
Mag sec |
10.78 |
|
delta mag (ΔM) |
2.17 |
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Spectral class |
G0V (yellow) |
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| Pri motion ra |
+052 |
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Sec motion ra |
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| Pri motion dec |
+016 |
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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
| Name |
HD 188581 |
|
Constellation |
Telescopium |
|
SAO |
229955 |
|
HIP |
98274 |
|
| Tycho2 |
8395-00655-1 |
|
Gaia DR2 |
6670759761800880768 |
|
HD |
188581 |
|
CD |
CD-4813359 |
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| CP |
CP-4810294 |
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Distance |
53.79 |
|
Distance ly |
175.46 |
|
ORBITAL ELEMENTS
| Period (P) | 35.28y | ± 2.48 |
Periastron (T) | 2016.036y | ± 0.065 |
Semi-major axis (a) | 0.2364a | ± 0.014 |
| Eccentricity (e) | 0.738 | ± 0.037 |
Inclination (i) | 70.2° | ± 2.2 |
Longitude of periastron (ω) | 60.6° | ± 4.1 |
| Node (Ω) | 254.2° | ± 2.4 |
Notes | | |
Reference | Tok2016e | |
| Equinox | 2000 | |
Last observation | | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
109.3 |
0.217 |
| 2001 |
112.2 |
0.204 |
| 2002 |
115.6 |
0.191 |
| 2003 |
119.5 |
0.177 |
| 2004 |
124.0 |
0.163 |
| 2005 |
129.4 |
0.149 |
| 2006 |
135.9 |
0.135 |
| 2007 |
143.9 |
0.122 |
| 2008 |
153.6 |
0.110 |
| 2009 |
165.3 |
0.101 |
| 2010 |
178.8 |
0.096 |
| 2011 |
193.3 |
0.094 |
| 2012 |
207.8 |
0.096 |
| 2013 |
221.4 |
0.099 |
| 2014 |
234.4 |
0.101 |
| 2015 |
248.4 |
0.089 |
| 2016 |
281.7 |
0.038 |
| 2017 |
55.3 |
0.067 |
| 2018 |
69.6 |
0.132 |
| 2019 |
75.1 |
0.176 |
| 2020 |
78.6 |
0.209 |
| 2021 |
81.3 |
0.232 |
| 2022 |
83.5 |
0.249 |
| 2023 |
85.5 |
0.262 |
| 2024 |
87.3 |
0.270 |
| 2025 |
89.1 |
0.275 |
| 2026 |
90.8 |
0.278 |
| 2027 |
92.5 |
0.278 |
| 2028 |
94.2 |
0.276 |
| 2029 |
95.9 |
0.273 |
| 2030 |
97.7 |
0.267 |
|
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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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