18197-4542 CHR 148 (HD 167954)
18h 19m 41.35s -45° 41' 55.8" P.A. 52.00 sep 0.3 mag 6.85, Sp F7V dist. 39.75 pc (129.66 l.y.)
Coord 2000 |
18197-4542 |
|
Discov num |
CHR 148 |
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Comp |
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Coord arcsec 2000 |
18 19 41.35 -45 41 55.8 |
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Date first |
1989 |
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Date last |
1989 |
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Obs |
1 |
|
Pa first |
52 |
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Pa last |
51.5 |
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P.A. Now (θ) |
51.5° |
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Sep first |
0.3 |
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Sep last |
0.306 |
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Sep. Now (ρ) |
0.306" |
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Mag pri |
6.85 |
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Mag sec |
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delta mag (ΔM) |
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Spectral class |
F7V (yellow-white) |
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Pri motion ra |
-076 |
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Sec motion ra |
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Pri motion dec |
-143 |
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Sec motion dec |
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Notes |
N
X
O
(See Notes, Dubious double, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 167954 |
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Constellation |
Telescopium |
|
SAO |
228906 |
|
HIP |
89808 |
|
Tycho2 |
8358-00989-1 |
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Gaia DR2 |
6708063202046601344 |
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HD |
167954 |
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GC |
24981 |
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GL |
Wo 9624 |
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CD |
CD-4512390 |
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CP |
CP-45 9231 |
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Distance |
39.75 |
|
Distance ly |
129.66 |
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ORBITAL ELEMENTS
Period (P) | 120.0074d | |
Periastron (T) | 30003.2812d (1941.022y) | |
Semi-major axis (a) | 3.95m | ± 0.7 |
Eccentricity (e) | 0.4282 | |
Inclination (i) | 85.81° | ± 16.32 |
Longitude of periastron (ω) | 134.41° | |
Node (Ω) | 188.34° | ± 15.09 |
Notes | n | |
Reference | HIP1997d | |
Equinox | | |
Last observation | 1991 | |
Grade | 9 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000-01-01 |
184.1 |
0.004 |
2001-01-01 |
185.0 |
0.004 |
2002-01-01 |
185.8 |
0.005 |
2003-01-01 |
186.5 |
0.005 |
2004-01-01 |
187.1 |
0.005 |
2005-01-01 |
187.8 |
0.005 |
2006-01-01 |
188.5 |
0.005 |
2007-01-01 |
189.4 |
0.004 |
2008-01-01 |
190.7 |
0.003 |
2009-01-01 |
193.1 |
0.002 |
2010-01-01 |
204.4 |
0.001 |
2011-01-01 |
358.4 |
0.001 |
2012-01-01 |
6.4 |
0.002 |
2013-01-01 |
9.3 |
0.003 |
2014-01-01 |
11.8 |
0.002 |
2015-01-01 |
15.3 |
0.002 |
2016-01-01 |
22.6 |
0.001 |
2017-01-01 |
54.3 |
|
2018-01-01 |
153.6 |
0.001 |
2019-01-01 |
172.9 |
0.001 |
2020-01-01 |
178.5 |
0.002 |
2021-01-01 |
181.2 |
0.003 |
2022-01-01 |
182.9 |
0.003 |
2023-01-01 |
184.1 |
0.004 |
2024-01-01 |
185.0 |
0.004 |
2025-01-01 |
185.8 |
0.005 |
2026-01-01 |
186.5 |
0.005 |
2027-01-01 |
187.1 |
0.005 |
2028-01-01 |
187.8 |
0.005 |
2029-01-01 |
188.5 |
0.005 |
2030-01-01 |
189.4 |
0.004 |
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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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