01071-0036 HDS 144 AB (HD 6639)
01h 07m 04.52s -00° 35' 31.3" P.A. 112.00 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 |
|
Coord arcsec 2000 |
01 07 04.52 -00 35 31.3 |
|
| Date first |
1991 |
|
Date last |
2022 |
|
Obs |
18 |
|
| Pa first |
308 |
|
Pa last |
112.3 |
|
P.A. Now (θ) |
112.3° |
|
| Sep first |
0.3 |
|
Sep last |
0.41 |
|
Sep. Now (ρ) |
0.41" |
|
| 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 |
|
|
| Pri motion dec |
-029 |
|
Sec motion dec |
|
|
| Notes |
O
(Orbital solution) |
|
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 |
|
01 07 05 -00 35 31 |
HDS 144 AB |
2022 |
18 |
112 |
0.4 |
9.21 |
11.76 |
2.55 |
Y |
<=== |
| Show |
|
|
01 07 05 -00 35 31 |
BAG 12 AC |
2022 |
13 |
143 |
1.4 |
9.21 |
12.18 |
2.97 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 6639 |
|
Constellation |
Cetus |
|
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 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
|
|
