20597-5211 I 669 AB (HD 199489)
20h 59m 40.24s -52° 10' 28.7" P.A. 67.00 sep 0.4 mag 9.01,9.51 Sp K0V dist. 40.67 pc (132.67 l.y.)
Coord 2000 |
20597-5211 |
|
Discov num |
I 669 |
|
Comp |
AB |
|
Coord arcsec 2000 |
20 59 40.24 -52 10 28.7 |
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Date first |
1909 |
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Date last |
2021 |
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Obs |
27 |
|
Pa first |
70 |
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Pa last |
67.1 |
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P.A. Now (θ) |
66° |
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Sep first |
0.4 |
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Sep last |
0.352 |
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Sep. Now (ρ) |
0.432" |
|
Mag pri |
9.01 |
|
Mag sec |
9.51 |
|
delta mag (ΔM) |
0.5 |
|
Spectral class |
K0V (yellow-orange) |
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Pri motion ra |
+158 |
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Sec motion ra |
|
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Pri motion dec |
-173 |
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Sec motion dec |
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Notes |
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Nature of this double is uncertain.
20597-5211 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
HD 199489 |
246818 |
20 59 40 -52 10 29 |
I 669 AB |
2021 |
27 |
67 |
0.4 |
9.01 |
9.51 |
0.50 |
Y |
<=== |
Show |
|
246818 |
20 59 40 -52 10 29 |
I 669 AC |
1999 |
2 |
282 |
33.4 |
9.01 |
15.00 |
5.99 |
|
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Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 199489 |
|
Constellation |
Indus |
|
SAO |
246818 |
|
HIP |
103620 |
|
Tycho2 |
8420-01257-1 |
|
HD |
199489 |
|
CD |
CD-52 9711 |
|
CP |
CP-5211799 |
|
Distance |
40.67 |
|
Distance ly |
132.67 |
|
ORBITAL ELEMENTS
Period (P) | 113.6y | ± 1.3 |
Periastron (T) | 2010.62y | ± 0.47 |
Semi-major axis (a) | 0.684a | ± 0.007 |
Eccentricity (e) | 0.613 | ± 0.012 |
Inclination (i) | 93.66° | ± 0.18 |
Longitude of periastron (ω) | 207.6° | ± 2.7 |
Node (Ω) | 63.02° | ± 0.31 |
Notes | | |
Reference | Mdz2017 | |
Equinox | 2000 | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
259.7 |
0.111 |
2001 |
255.0 |
0.142 |
2002 |
251.9 |
0.173 |
2003 |
249.8 |
0.202 |
2004 |
248.2 |
0.229 |
2005 |
246.9 |
0.252 |
2006 |
245.8 |
0.270 |
2007 |
244.8 |
0.281 |
2008 |
243.9 |
0.284 |
2009 |
242.9 |
0.276 |
2010 |
241.9 |
0.254 |
2011 |
240.6 |
0.220 |
2012 |
238.6 |
0.175 |
2013 |
235.1 |
0.122 |
2014 |
225.6 |
0.064 |
2015 |
153.7 |
0.021 |
2016 |
83.4 |
0.065 |
2017 |
74.0 |
0.123 |
2018 |
70.7 |
0.181 |
2019 |
68.9 |
0.236 |
2020 |
67.8 |
0.289 |
2021 |
67.1 |
0.339 |
2022 |
66.5 |
0.387 |
2023 |
66.0 |
0.432 |
2024 |
65.7 |
0.475 |
2025 |
65.4 |
0.515 |
2026 |
65.1 |
0.554 |
2027 |
64.9 |
0.590 |
2028 |
64.7 |
0.624 |
2029 |
64.5 |
0.657 |
2030 |
64.3 |
0.687 |
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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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