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 |
|
Comp |
BC |
|
Coord arcsec 2000 |
20 00 14.72 -55 22 25.0 |
|
| Date first |
1926 |
|
Date last |
2021 |
|
Obs |
16 |
|
| Pa first |
129 |
|
Pa last |
222.8 |
|
P.A. Now (θ) |
221.9° |
|
| Sep first |
0.3 |
|
Sep last |
0.271 |
|
Sep. Now (ρ) |
0.302" |
|
| Mag pri |
10.98 |
|
Mag sec |
11.07 |
|
delta mag (ΔM) |
0.09 |
|
Spectral class |
K1+K1 (yellow-orange/yellow-orange) |
|
| Pri motion ra |
-014 |
|
Sec motion ra |
-014 |
|
| Pri motion dec |
+002 |
|
Sec motion dec |
+002 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
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 |
|
|
| Show |
|
|
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 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
WDS 20002-5522 B 459 BC : NOTES
| discov_num |
notes |
refcode |
| I 1041 |
BC: Rapid direct motion. |
|
| B 459 |
BC: Gomez et al. (2016) derive dynamical parallax and component |
|
|
masses: 15.36 +/- 0.24 mas, 0.655 +/- 0.005 Msun, 0.643 +/- 0.005 Msun |
Doc2016i |
REFERENCES
| refcode |
metd |
author |
reference |
| Doc2016i |
orb - |
Gomez, J., Docobo, J.A., Campo, P., & Mendez, R.A. |
2016AJ....152..216G |
| Doc2016i |
|
AJ 152, 216, 2016 |
|
DISCOVERER
| idgroup |
discov |
author |
| 1 |
B |
van den Bos, W.H. |
| 212 |
I |
Innes, R.T.A. |
| 216 |
I |
MNRAS 57, 533, 1897 (data also in I__1897b, |
| 216 |
I |
I__1897c) |
WDS HISTORIC DATA
| coord_2000 |
discov_num |
comp |
epoch |
obs |
pa |
sep |
mag_pri |
mag_sec |
spectr |
notes |
coord_arcsec_2000 |
| 20002-5522 |
B 459 |
BC |
1991 |
13 |
95 |
0.3 |
10.98 |
11.07 |
|
O |
200014.72-552225.0 |
| 20002-5522 |
B 459 |
BC |
2015 |
14 |
197 |
0.3 |
10.98 |
11.07 |
K1IV |
NO |
200014.72-552225.0 |
| 20002-5522 |
B 459 |
BC |
2017 |
15 |
204 |
0.3 |
10.98 |
11.07 |
K1+K1 |
NO |
200014.72-552225.0 |
| 20002-5522 |
B 459 |
BC |
2021 |
16 |
223 |
0.3 |
10.98 |
11.07 |
K1+K1 |
NO |
200014.72-552225.0 |
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WDS 20002-5522 B 459 BC : VISUAL OBSERVATIONS REPORTS
No records found.
WDS 20002-5522 B 459 BC : MEASURES
No records found.
WDS 20002-5522 : VIRTUAL EYEPIECE
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WDS 20002-5522 : ALADIN DSS IMAGE @
Error -22130
Not valid ID.
Error -22130
Not valid ID.
Error -27220
Not valid ID.
