01071-0036 HDS 144 AB (HD 6639)
01h 07m 04.52s -00° 35' 31.3" P.A. 122.00 sep 0.4 mag 9.21,11.76 Sp K0 dist. 52.44 pc (171.06 l.y.)
Coord 2000 |
01071-0036 |
|
Discov num |
HDS 144 |
|
Comp |
AB |
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Coord arcsec 2000 |
01 07 04.52 -00 35 31.3 |
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Date first |
1991 |
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Date last |
2019 |
|
Obs |
16 |
|
Pa first |
308 |
|
Pa last |
122.1 |
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P.A. Now (θ) |
122.1° |
|
Sep first |
0.3 |
|
Sep last |
0.378 |
|
Sep. Now (ρ) |
0.378" |
|
Mag pri |
9.21 |
|
Mag sec |
11.76 |
|
delta mag (ΔM) |
2.55 |
|
Spectral class |
K0 (yellow-orange) |
|
Pri motion ra |
-034 |
|
Sec motion ra |
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|
Pri motion dec |
-029 |
|
Sec motion dec |
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Notes |
O
(Orbital solution) |
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This double is physical.
01071-0036 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
HD 6639 |
129127 |
01 07 05 -00 35 31 |
HDS 144 AB |
2019 |
16 |
122 |
0.4 |
9.21 |
11.76 |
2.55 |
Y |
<=== |
Show |
|
129127 |
01 07 05 -00 35 31 |
BAG 12 AC |
2019 |
12 |
147 |
1.4 |
9.21 |
12.18 |
2.97 |
|
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Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 6639 |
|
Constellation |
Cetus |
|
SAO |
129127 |
|
HIP |
5245 |
|
Tycho2 |
4681-00667-1 |
|
HD |
6639 |
|
BD |
BD-01 147 |
|
Distance |
52.44 |
|
Distance ly |
171.06 |
|
ORBITAL ELEMENTS
Period (P) | 72.6y | |
Periastron (T) | 2073.1y | |
Semi-major axis (a) | 0.365a | |
Eccentricity (e) | 0.237 | |
Inclination (i) | 138.2° | |
Longitude of periastron (ω) | 30° | |
Node (Ω) | 281.9° | |
Notes | | |
Reference | Tok2014a | |
Equinox | 2000 | |
Last observation | 2013 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
262.0 |
0.267 |
2001 |
255.1 |
0.258 |
2002 |
247.7 |
0.250 |
2003 |
239.8 |
0.242 |
2004 |
231.3 |
0.235 |
2005 |
222.4 |
0.229 |
2006 |
213.1 |
0.226 |
2007 |
203.7 |
0.226 |
2008 |
194.4 |
0.228 |
2009 |
185.5 |
0.234 |
2010 |
177.0 |
0.242 |
2011 |
169.2 |
0.253 |
2012 |
162.0 |
0.265 |
2013 |
155.5 |
0.278 |
2014 |
149.6 |
0.292 |
2015 |
144.3 |
0.307 |
2016 |
139.4 |
0.321 |
2017 |
135.0 |
0.335 |
2018 |
130.9 |
0.349 |
2019 |
127.1 |
0.362 |
2020 |
123.6 |
0.374 |
2021 |
120.3 |
0.385 |
2022 |
117.1 |
0.396 |
2023 |
114.1 |
0.405 |
2024 |
111.3 |
0.413 |
2025 |
108.5 |
0.420 |
2026 |
105.9 |
0.426 |
2027 |
103.3 |
0.431 |
2028 |
100.7 |
0.435 |
2029 |
98.2 |
0.438 |
2030 |
95.7 |
0.440 |
2031 |
93.2 |
0.440 |
2032 |
90.8 |
0.440 |
2033 |
88.3 |
0.439 |
2034 |
85.8 |
0.437 |
2035 |
83.3 |
0.433 |
2036 |
80.7 |
0.429 |
2037 |
78.1 |
0.425 |
2038 |
75.4 |
0.419 |
2039 |
72.6 |
0.413 |
2040 |
69.8 |
0.406 |
2041 |
66.8 |
0.398 |
2042 |
63.7 |
0.390 |
2043 |
60.5 |
0.382 |
2044 |
57.2 |
0.373 |
2045 |
53.6 |
0.364 |
2046 |
49.9 |
0.355 |
2047 |
46.0 |
0.345 |
2048 |
41.9 |
0.336 |
2049 |
37.6 |
0.327 |
2050 |
33.0 |
0.319 |
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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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