18455+0530 STF 2375 AB (HD 173495)
18h 45m 28.36s +05° 30' 00.4" P.A. 120.00 sep 2.6 mag 6.34,6.73 Sp A1V dist. 188.68 pc (615.47 l.y.)
| Coord 2000 |
18455+0530 |
|
Discov num |
STF2375 |
|
Comp |
AB |
|
Coord arcsec 2000 |
18 45 28.36 +05 30 00.4 |
|
| Date first |
1825 |
|
Date last |
2019 |
|
Obs |
307 |
|
| Pa first |
108 |
|
Pa last |
119.6 |
|
P.A. Now (θ) |
119.6° |
|
| Sep first |
2.2 |
|
Sep last |
2.593 |
|
Sep. Now (ρ) |
2.593" |
|
| Mag pri |
6.34 |
|
Mag sec |
6.73 |
|
delta mag (ΔM) |
0.39 |
|
Spectral class |
A1V (white) |
|
| Pri motion ra |
+009 |
|
Sec motion ra |
+009 |
|
| Pri motion dec |
-003 |
|
Sec motion dec |
-003 |
|
| Notes |
N
O
V
(See Notes, Orbital solution, Proper motion indicates physical) |
|
This double is physical.
18455+0530 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
123886 |
18 45 28 +05 30 00 |
FIN 332 Aa,Ab |
2021 |
75 |
142 |
0.0 |
6.91 |
7.31 |
0.40 |
Y |
|
| Show |
HD 173495 |
123886 |
18 45 28 +05 30 00 |
STF 2375 AB |
2019 |
307 |
120 |
2.6 |
6.34 |
6.73 |
0.39 |
Y |
<=== |
| Show |
|
123886 |
18 45 28 +05 30 00 |
FIN 332 Ba,Bb |
2021 |
58 |
324 |
0.1 |
7.48 |
7.48 |
0.00 |
Y |
|
Quadruple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 173495 |
|
Constellation |
Serpens |
|
SAO |
123886 |
|
HIP |
92027 |
|
| Tycho2 |
0456-01022-2 |
|
Gaia DR2 |
4285283042432285568 |
|
HD |
173495 |
|
HR |
7048 |
|
| GC |
25674 |
|
ADS |
11640 |
|
BD |
BD+05 3941 |
|
Distance |
188.68 |
|
| Distance ly |
615.47 |
|
ORBITAL ELEMENTS
| Period (P) | 5000y | |
Periastron (T) | 557y | |
Semi-major axis (a) | 3.64a | |
| Eccentricity (e) | 0.5 | |
Inclination (i) | 64.5° | |
Longitude of periastron (ω) | 143.4° | |
| Node (Ω) | 167.5° | |
Notes | n | |
Reference | Tok2020k | |
| Equinox | | |
Last observation | | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
119.5 |
2.555 |
| 2001 |
119.5 |
2.557 |
| 2002 |
119.6 |
2.559 |
| 2003 |
119.6 |
2.561 |
| 2004 |
119.7 |
2.564 |
| 2005 |
119.7 |
2.566 |
| 2006 |
119.8 |
2.568 |
| 2007 |
119.8 |
2.571 |
| 2008 |
119.9 |
2.573 |
| 2009 |
120.0 |
2.575 |
| 2010 |
120.0 |
2.578 |
| 2011 |
120.1 |
2.580 |
| 2012 |
120.1 |
2.582 |
| 2013 |
120.2 |
2.585 |
| 2014 |
120.2 |
2.587 |
| 2015 |
120.3 |
2.589 |
| 2016 |
120.3 |
2.592 |
| 2017 |
120.4 |
2.594 |
| 2018 |
120.4 |
2.596 |
| 2019 |
120.5 |
2.598 |
| 2020 |
120.5 |
2.601 |
| 2021 |
120.6 |
2.603 |
| 2022 |
120.6 |
2.605 |
| 2023 |
120.7 |
2.608 |
| 2024 |
120.7 |
2.610 |
| 2025 |
120.8 |
2.612 |
| 2026 |
120.9 |
2.615 |
| 2027 |
120.9 |
2.617 |
| 2028 |
121.0 |
2.619 |
| 2029 |
121.0 |
2.622 |
| 2030 |
121.1 |
2.624 |
|
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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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