19190-3317 I 253 AB (HD 180702)
19h 18m 59.06s -33° 16' 41.8" P.A. 141.00 sep 0.6 mag 8.77,7.25 Sp G1V dist. 55.1 pc (179.74 l.y.)
Coord 2000 |
19190-3317 |
|
Discov num |
I 253 |
|
Comp |
AB |
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Coord arcsec 2000 |
19 18 59.06 -33 16 41.8 |
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Date first |
1897 |
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Date last |
2021 |
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Obs |
46 |
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Pa first |
135 |
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Pa last |
141.2 |
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P.A. Now (θ) |
140.7° |
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Sep first |
0.5 |
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Sep last |
0.571 |
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Sep. Now (ρ) |
0.596" |
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Mag pri |
8.77 |
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Mag sec |
7.25 |
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delta mag (ΔM) |
1.52 |
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Spectral class |
G1V (yellow) |
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Pri motion ra |
-016 |
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Sec motion ra |
-016 |
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Pri motion dec |
-131 |
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Sec motion dec |
-131 |
|
Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
19190-3317 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
HD 180702 |
211161 |
19 18 59 -33 16 42 |
I 253 AB |
2021 |
46 |
141 |
0.6 |
8.77 |
7.25 |
1.52 |
Y |
<=== |
Show |
|
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19 18 59 -33 16 42 |
TOK 624 AC |
1999 |
5 |
61 |
999.9 |
7.04 |
8.23 |
1.19 |
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Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 180702 |
|
Constellation |
Sagittarius |
|
SAO |
211161 |
|
HIP |
94926 |
|
Tycho2 |
7427-01727-1 |
|
HD |
180702 |
|
GC |
26617 |
|
CD |
CD-3314114 |
|
CP |
CP-33 5579 |
|
Distance |
55.1 |
|
Distance ly |
179.74 |
|
ORBITAL ELEMENTS
Period (P) | 56.59y | ± 0.37 |
Periastron (T) | 1939.36y | ± 0.51 |
Semi-major axis (a) | 448m | ± 21 |
Eccentricity (e) | 0.738 | ± 0.016 |
Inclination (i) | 93.31° | ± 0.22 |
Longitude of periastron (ω) | 141.7° | ± 4.3 |
Node (Ω) | 137.96° | ± 0.16 |
Notes | | |
Reference | Mdz2021 | |
Equinox | | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
303.2 |
0.067 |
2001 |
279.5 |
0.032 |
2002 |
194.9 |
0.027 |
2003 |
162.4 |
0.060 |
2004 |
153.8 |
0.097 |
2005 |
150.0 |
0.134 |
2006 |
147.8 |
0.171 |
2007 |
146.4 |
0.206 |
2008 |
145.4 |
0.240 |
2009 |
144.6 |
0.273 |
2010 |
144.0 |
0.305 |
2011 |
143.5 |
0.335 |
2012 |
143.1 |
0.364 |
2013 |
142.8 |
0.391 |
2014 |
142.5 |
0.418 |
2015 |
142.2 |
0.443 |
2016 |
142.0 |
0.467 |
2017 |
141.7 |
0.489 |
2018 |
141.6 |
0.510 |
2019 |
141.4 |
0.530 |
2020 |
141.2 |
0.548 |
2021 |
141.0 |
0.566 |
2022 |
140.9 |
0.581 |
2023 |
140.7 |
0.596 |
2024 |
140.6 |
0.609 |
2025 |
140.5 |
0.620 |
2026 |
140.3 |
0.630 |
2027 |
140.2 |
0.639 |
2028 |
140.1 |
0.646 |
2029 |
140.0 |
0.652 |
2030 |
139.9 |
0.655 |
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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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