18112-1951 BU 132 AB (HD 166393)
18h 11m 14.78s -19° 50' 31.6" P.A. 186.00 sep 1.4 mag 7.01,7.13 Sp A4V dist. 101.52 pc (331.16 l.y.)
| Coord 2000 |
18112-1951 |
|
Discov num |
BU 132 |
|
Comp |
AB |
|
Coord arcsec 2000 |
18 11 14.78 -19 50 31.6 |
|
| Date first |
1873 |
|
Date last |
2023 |
|
Obs |
98 |
|
| Pa first |
240 |
|
Pa last |
185.7 |
|
P.A. Now (θ) |
185.7° |
|
| Sep first |
0.8 |
|
Sep last |
1.388 |
|
Sep. Now (ρ) |
1.388" |
|
| Mag pri |
7.01 |
|
Mag sec |
7.13 |
|
delta mag (ΔM) |
0.12 |
|
Spectral class |
A4V (white) |
|
| Pri motion ra |
+001 |
|
Sec motion ra |
+001 |
|
| Pri motion dec |
-025 |
|
Sec motion dec |
-025 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
18112-1951 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
161153 |
18 11 15 -19 50 32 |
TOK 57 Aa,Ab |
2017 |
5 |
16 |
0.0 |
6.60 |
9.60 |
3.00 |
|
|
| Show |
HD 166393 |
161153 |
18 11 15 -19 50 32 |
BU 132 AB |
2023 |
98 |
186 |
1.4 |
7.01 |
7.13 |
0.12 |
Y |
<=== |
| Show |
|
161153 |
18 11 15 -19 50 31 |
OCC 9175 Ba,Bb |
1976 |
0 |
-1 |
0.0 |
7.50 |
8.60 |
1.10 |
|
|
Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 166393 |
|
Constellation |
Sagittarius |
|
SAO |
161153 |
|
HIP |
89114 |
|
| Tycho2 |
6272-02382-1 |
|
Gaia DR2 |
4094308180585050496 |
|
HD |
166393 |
|
HR |
6798 |
|
| ADS |
11127 |
|
BD |
BD-19 4886 |
|
Distance |
101.52 |
|
Distance ly |
331.16 |
|
ORBITAL ELEMENTS
| Period (P) | 897.8626y | ± 414.2018 |
Periastron (T) | 1841.0127y | ± 16.4971 |
Semi-major axis (a) | 1.58136a | ± 0.59058 |
| Eccentricity (e) | 0.76712 | ± 0.16158 |
Inclination (i) | 130.214° | ± 15.374 |
Longitude of periastron (ω) | 96.817° | ± 10.42 |
| Node (Ω) | 66.607° | ± 32.241 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
190.9 |
1.370 |
| 2001 |
190.7 |
1.373 |
| 2002 |
190.5 |
1.376 |
| 2003 |
190.3 |
1.379 |
| 2004 |
190.0 |
1.382 |
| 2005 |
189.8 |
1.385 |
| 2006 |
189.6 |
1.388 |
| 2007 |
189.4 |
1.391 |
| 2008 |
189.2 |
1.394 |
| 2009 |
189.0 |
1.397 |
| 2010 |
188.8 |
1.400 |
| 2011 |
188.5 |
1.403 |
| 2012 |
188.3 |
1.406 |
| 2013 |
188.1 |
1.409 |
| 2014 |
187.9 |
1.411 |
| 2015 |
187.7 |
1.414 |
| 2016 |
187.5 |
1.417 |
| 2017 |
187.3 |
1.420 |
| 2018 |
187.1 |
1.423 |
| 2019 |
186.9 |
1.425 |
| 2020 |
186.7 |
1.428 |
| 2021 |
186.5 |
1.431 |
| 2022 |
186.3 |
1.434 |
| 2023 |
186.1 |
1.436 |
| 2024 |
185.9 |
1.439 |
| 2025 |
185.7 |
1.442 |
| 2026 |
185.5 |
1.444 |
| 2027 |
185.3 |
1.447 |
| 2028 |
185.1 |
1.450 |
| 2029 |
184.9 |
1.452 |
| 2030 |
184.7 |
1.455 |
| 2031 |
184.5 |
1.458 |
| 2032 |
184.3 |
1.460 |
| 2033 |
184.1 |
1.463 |
| 2034 |
183.9 |
1.465 |
| 2035 |
183.7 |
1.468 |
| 2036 |
183.5 |
1.470 |
| 2037 |
183.3 |
1.473 |
| 2038 |
183.1 |
1.475 |
| 2039 |
182.9 |
1.478 |
| 2040 |
182.8 |
1.480 |
| 2041 |
182.6 |
1.483 |
| 2042 |
182.4 |
1.485 |
| 2043 |
182.2 |
1.488 |
| 2044 |
182.0 |
1.490 |
| 2045 |
181.8 |
1.493 |
| 2046 |
181.6 |
1.495 |
| 2047 |
181.4 |
1.497 |
| 2048 |
181.3 |
1.500 |
| 2049 |
181.1 |
1.502 |
| 2050 |
180.9 |
1.504 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
|
|
