20002-5522 B 459 BC
20h 00m 14.72s -55° 22' 25.0" P.A. 223.00 sep 0.3 mag 10.98,11.07 Sp K1+K1 dist. 68.78 pc (224.36 l.y.)
Coord 2000 |
20002-5522 |
|
Discov num |
B 459 |
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Comp |
BC |
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Coord arcsec 2000 |
20 00 14.72 -55 22 25.0 |
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Date first |
1926 |
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Date last |
2021 |
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Obs |
16 |
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Pa first |
129 |
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Pa last |
222.8 |
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P.A. Now (θ) |
221.9° |
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Sep first |
0.3 |
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Sep last |
0.271 |
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Sep. Now (ρ) |
0.302" |
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Mag pri |
10.98 |
|
Mag sec |
11.07 |
|
delta mag (ΔM) |
0.09 |
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Spectral class |
K1+K1 (yellow-orange/yellow-orange) |
|
Pri motion ra |
-014 |
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Sec motion ra |
-014 |
|
Pri motion dec |
+002 |
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Sec motion dec |
+002 |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
20002-5522 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
HD 188908 |
246378 |
20 00 15 -55 22 25 |
I 1041 A,BC |
2021 |
20 |
45 |
1.4 |
9.69 |
10.20 |
0.51 |
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Show |
|
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20 00 15 -55 22 25 |
B 459 BC |
2021 |
16 |
223 |
0.3 |
10.98 |
11.07 |
0.09 |
Y |
<=== |
Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Telescopium |
|
HIP |
98457 |
|
Tycho2 |
8780-00272-1 |
|
Gaia DR2 |
6449050801202399104 |
|
HD |
188908 |
|
CP |
CP-55 9275 |
|
Distance |
68.78 |
|
Distance ly |
224.36 |
|
ORBITAL ELEMENTS
Period (P) | 72.78y | ± 1.2 |
Periastron (T) | 2044.56y | ± 0.5 |
Semi-major axis (a) | 0.292a | ± 0.002 |
Eccentricity (e) | 0.229 | ± 0.005 |
Inclination (i) | 44.9° | ± 2 |
Longitude of periastron (ω) | 278.7° | ± 3 |
Node (Ω) | 64.6° | ± 1 |
Notes | n | |
Reference | Doc2016i | |
Equinox | 2000 | |
Last observation | 2015 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
130.1 |
0.258 |
2001 |
134.5 |
0.256 |
2002 |
139.0 |
0.254 |
2003 |
143.5 |
0.253 |
2004 |
148.0 |
0.253 |
2005 |
152.6 |
0.253 |
2006 |
157.1 |
0.254 |
2007 |
161.6 |
0.255 |
2008 |
166.0 |
0.257 |
2009 |
170.4 |
0.259 |
2010 |
174.7 |
0.262 |
2011 |
178.9 |
0.265 |
2012 |
183.0 |
0.268 |
2013 |
187.0 |
0.272 |
2014 |
190.9 |
0.275 |
2015 |
194.7 |
0.279 |
2016 |
198.3 |
0.283 |
2017 |
201.9 |
0.287 |
2018 |
205.4 |
0.290 |
2019 |
208.8 |
0.294 |
2020 |
212.2 |
0.296 |
2021 |
215.5 |
0.299 |
2022 |
218.7 |
0.301 |
2023 |
221.9 |
0.302 |
2024 |
225.1 |
0.303 |
2025 |
228.2 |
0.302 |
2026 |
231.4 |
0.301 |
2027 |
234.7 |
0.299 |
2028 |
238.0 |
0.296 |
2029 |
241.3 |
0.292 |
2030 |
244.8 |
0.286 |
2031 |
248.4 |
0.280 |
2032 |
252.2 |
0.272 |
2033 |
256.3 |
0.263 |
2034 |
260.7 |
0.253 |
2035 |
265.4 |
0.242 |
2036 |
270.6 |
0.231 |
2037 |
276.4 |
0.218 |
2038 |
282.9 |
0.206 |
2039 |
290.2 |
0.193 |
2040 |
298.5 |
0.182 |
2041 |
307.8 |
0.172 |
2042 |
318.1 |
0.165 |
2043 |
329.1 |
0.161 |
2044 |
340.5 |
0.160 |
2045 |
351.7 |
0.163 |
2046 |
2.2 |
0.169 |
2047 |
11.9 |
0.178 |
2048 |
20.5 |
0.189 |
2049 |
28.2 |
0.201 |
2050 |
35.0 |
0.212 |
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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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