19197-2836 B 433 AB (HD 180957)
19h 19m 39.44s -28° 36' 18.8" P.A. 276.00 sep 0.1 mag 9.89,10.08 Sp G1V dist. 119.05 pc (388.34 l.y.)
Coord 2000 |
19197-2836 |
|
Discov num |
B 433 |
|
Comp |
AB |
|
Coord arcsec 2000 |
19 19 39.44 -28 36 18.8 |
|
Date first |
1926 |
|
Date last |
2021 |
|
Obs |
14 |
|
Pa first |
174 |
|
Pa last |
276.1 |
|
P.A. Now (θ) |
276.1° |
|
Sep first |
0.4 |
|
Sep last |
0.135 |
|
Sep. Now (ρ) |
0.135" |
|
Mag pri |
9.89 |
|
Mag sec |
10.08 |
|
delta mag (ΔM) |
0.19 |
|
Spectral class |
G1V (yellow) |
|
Pri motion ra |
-017 |
|
Sec motion ra |
-017 |
|
Pri motion dec |
-027 |
|
Sec motion dec |
-027 |
|
Notes |
O
(Orbital solution) |
|
This double is physical.
19197-2836 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
HD 180957 |
187969 |
19 19 39 -28 36 19 |
B 433 AB |
2021 |
14 |
276 |
0.1 |
9.89 |
10.08 |
0.19 |
Y |
<=== |
Show |
|
187969 |
19 19 39 -28 36 19 |
B 433 AC |
2021 |
4 |
54 |
2.6 |
10.00 |
13.60 |
3.60 |
|
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Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 180957 |
|
Constellation |
Sagittarius |
|
SAO |
187969 |
|
HIP |
94985 |
|
Tycho2 |
6887-01586-1 |
|
Gaia DR2 |
6759572538660355840 |
|
HD |
180957 |
|
ADS |
12299 |
|
CD |
CD-2815665 |
|
CP |
CP-28 6878 |
|
Distance |
119.05 |
|
Distance ly |
388.34 |
|
ORBITAL ELEMENTS
Period (P) | 250y | |
Periastron (T) | 2027.51y | |
Semi-major axis (a) | 0.441a | |
Eccentricity (e) | 0.458 | |
Inclination (i) | 57.2° | |
Longitude of periastron (ω) | 97.7° | |
Node (Ω) | 219.7° | |
Notes | | |
Reference | Tok2020e | |
Equinox | | |
Last observation | 2019 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
223.7 |
0.347 |
2001 |
224.9 |
0.340 |
2002 |
226.1 |
0.333 |
2003 |
227.3 |
0.325 |
2004 |
228.6 |
0.317 |
2005 |
230.0 |
0.309 |
2006 |
231.4 |
0.301 |
2007 |
233.0 |
0.292 |
2008 |
234.6 |
0.283 |
2009 |
236.4 |
0.273 |
2010 |
238.2 |
0.263 |
2011 |
240.3 |
0.253 |
2012 |
242.4 |
0.243 |
2013 |
244.8 |
0.233 |
2014 |
247.4 |
0.222 |
2015 |
250.3 |
0.211 |
2016 |
253.5 |
0.201 |
2017 |
257.0 |
0.190 |
2018 |
261.0 |
0.180 |
2019 |
265.4 |
0.170 |
2020 |
270.3 |
0.161 |
2021 |
275.8 |
0.152 |
2022 |
282.0 |
0.144 |
2023 |
288.8 |
0.138 |
2024 |
296.1 |
0.134 |
2025 |
303.8 |
0.131 |
2026 |
311.8 |
0.130 |
2027 |
319.7 |
0.131 |
2028 |
327.4 |
0.134 |
2029 |
334.7 |
0.139 |
2030 |
341.4 |
0.145 |
|
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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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