20468+0733 GAA 8 (HD 197952)
20h 46m 49.23s +07° 33' 10.4" P.A. 1.00 sep 0.0 mag 7.80,8.10 Sp F8 dist. 159.24 pc (519.44 l.y.)
| Coord 2000 |
20468+0733 |
|
Discov num |
GAA 8 |
|
Comp |
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Coord arcsec 2000 |
20 46 49.23 +07 33 10.4 |
|
| Date first |
2017 |
|
Date last |
2017 |
|
Obs |
4 |
|
| Pa first |
2 |
|
Pa last |
1.3 |
|
P.A. Now (θ) |
1.3° |
|
| Sep first |
0.0 |
|
Sep last |
0.005 |
|
Sep. Now (ρ) |
0.005" |
|
| Mag pri |
7.80 |
|
Mag sec |
8.10 |
|
delta mag (ΔM) |
0.3 |
|
Spectral class |
F8 (yellow-white) |
|
| Pri motion ra |
+011 |
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Sec motion ra |
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| Pri motion dec |
-027 |
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Sec motion dec |
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| Notes |
N
O
K
(See Notes, Orbital solution, K-band or other infrared magnitudes) |
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Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 197952 |
|
Constellation |
Delphinus |
|
SAO |
126201 |
|
HIP |
102545 |
|
| Tycho2 |
1089-00751-1 |
|
HD |
197952 |
|
BD |
BD+07 4544 |
|
Distance |
159.24 |
|
| Distance ly |
519.44 |
|
ORBITAL ELEMENTS
| Period (P) | 99.269d | ± 0.0009 |
Periastron (T) | 5235.164d (1873.209y) | ± 0.07 |
Semi-major axis (a) | 3.508m | ± 0.013 |
| Eccentricity (e) | 0.5197 | ± 0.0004 |
Inclination (i) | 89.9° | ± 0.11 |
Longitude of periastron (ω) | 350° | ± 0.07 |
| Node (Ω) | 181.41° | ± 0.14 |
Notes | n | |
Reference | GaA2019 | |
| Equinox | | |
Last observation | 2017 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
1.4 |
0.005 |
| 2001-01-01 |
1.2 |
0.002 |
| 2002-01-01 |
1.6 |
0.002 |
| 2003-01-01 |
1.4 |
0.005 |
| 2004-01-01 |
1.3 |
0.002 |
| 2005-01-01 |
1.8 |
0.001 |
| 2006-01-01 |
1.4 |
0.005 |
| 2007-01-01 |
1.3 |
0.003 |
| 2008-01-01 |
180.9 |
|
| 2009-01-01 |
1.4 |
0.005 |
| 2010-01-01 |
1.3 |
0.004 |
| 2011-01-01 |
181.3 |
0.001 |
| 2012-01-01 |
1.4 |
0.005 |
| 2013-01-01 |
1.3 |
0.004 |
| 2014-01-01 |
181.4 |
0.002 |
| 2015-01-01 |
1.4 |
0.005 |
| 2016-01-01 |
1.4 |
0.005 |
| 2017-01-01 |
181.5 |
0.001 |
| 2018-01-01 |
1.5 |
0.004 |
| 2019-01-01 |
1.4 |
0.005 |
| 2020-01-01 |
181.9 |
|
| 2021-01-01 |
1.5 |
0.004 |
| 2022-01-01 |
1.4 |
0.005 |
| 2023-01-01 |
0.7 |
|
| 2024-01-01 |
1.5 |
0.003 |
| 2025-01-01 |
1.4 |
0.005 |
| 2026-01-01 |
1.2 |
0.001 |
| 2027-01-01 |
1.5 |
0.002 |
| 2028-01-01 |
1.4 |
0.005 |
| 2029-01-01 |
1.2 |
0.002 |
| 2030-01-01 |
1.7 |
0.001 |
|
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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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