18055-6312 RST 959 Aa,Ab
18h 05m 30.73s -63° 11' 39.1" P.A. 105.00 sep 0.4 mag 8.30,9.08 Sp G5V dist. 72.83 pc (237.57 l.y.)
| Coord 2000 |
18055-6312 |
|
Discov num |
RST 959 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
18 05 30.73 -63 11 39.1 |
|
| Date first |
1929 |
|
Date last |
2019 |
|
Obs |
8 |
|
| Pa first |
117 |
|
Pa last |
104.5 |
|
P.A. Now (θ) |
104.5° |
|
| Sep first |
0.3 |
|
Sep last |
0.368 |
|
Sep. Now (ρ) |
0.368" |
|
| Mag pri |
8.30 |
|
Mag sec |
9.08 |
|
delta mag (ΔM) |
0.78 |
|
Spectral class |
G5V (yellow) |
|
| Pri motion ra |
-027 |
|
Sec motion ra |
-027 |
|
| Pri motion dec |
-087 |
|
Sec motion dec |
-087 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
18055-6312 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
254132 |
18 05 31 -63 11 39 |
RST 959 Aa,Ab |
2019 |
8 |
105 |
0.4 |
8.30 |
9.08 |
0.78 |
Y |
<=== |
| Show |
HD 164444 |
254132 |
18 05 31 -63 11 39 |
UC 3491 AB |
2015 |
3 |
138 |
44.1 |
8.30 |
12.12 |
3.82 |
|
|
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Pavo |
|
SAO |
254132 |
|
HIP |
88607 |
|
Tycho2 |
9059-00705-1 |
|
| Gaia DR2 |
6630829622654095872 |
|
HD |
164444 |
|
CP |
CP-63 4275 |
|
Distance |
72.83 |
|
| Distance ly |
237.57 |
|
ORBITAL ELEMENTS
| Period (P) | 94.7y | ± 2.3 |
Periastron (T) | 2046.38y | ± 1.5 |
Semi-major axis (a) | 0.348a | ± 0.006 |
| Eccentricity (e) | 0.234 | ± 0.019 |
Inclination (i) | 20° | ± 0 |
Longitude of periastron (ω) | 0° | ± 0 |
| Node (Ω) | 232.3° | ± 3.2 |
Notes | | |
Reference | Tok2021c | |
| Equinox | 2000 | |
Last observation | 2020 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
54.5 |
0.429 |
| 2001 |
56.8 |
0.429 |
| 2002 |
59.1 |
0.428 |
| 2003 |
61.4 |
0.427 |
| 2004 |
63.7 |
0.425 |
| 2005 |
66.0 |
0.424 |
| 2006 |
68.4 |
0.422 |
| 2007 |
70.8 |
0.419 |
| 2008 |
73.2 |
0.417 |
| 2009 |
75.6 |
0.414 |
| 2010 |
78.1 |
0.410 |
| 2011 |
80.6 |
0.407 |
| 2012 |
83.2 |
0.403 |
| 2013 |
85.8 |
0.399 |
| 2014 |
88.5 |
0.394 |
| 2015 |
91.2 |
0.390 |
| 2016 |
94.0 |
0.385 |
| 2017 |
96.9 |
0.380 |
| 2018 |
99.8 |
0.375 |
| 2019 |
102.9 |
0.370 |
| 2020 |
106.0 |
0.364 |
| 2021 |
109.2 |
0.358 |
| 2022 |
112.6 |
0.353 |
| 2023 |
116.0 |
0.347 |
| 2024 |
119.5 |
0.341 |
| 2025 |
123.2 |
0.335 |
| 2026 |
127.0 |
0.330 |
| 2027 |
131.0 |
0.324 |
| 2028 |
135.1 |
0.318 |
| 2029 |
139.3 |
0.313 |
| 2030 |
143.7 |
0.308 |
|
|
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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