18440+0321 A 2388 (HD 173196)
18h 43m 59.30s +03° 20' 38.2" P.A. 131.00 sep 0.3 mag 8.59,9.56 Sp A0 dist. 209.64 pc (683.85 l.y.)
Coord 2000 |
18440+0321 |
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Discov num |
A 2388 |
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Comp |
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Coord arcsec 2000 |
18 43 59.30 +03 20 38.2 |
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Date first |
1910 |
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Date last |
2017 |
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Obs |
24 |
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Pa first |
56 |
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Pa last |
130.8 |
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P.A. Now (θ) |
130.8° |
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Sep first |
0.3 |
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Sep last |
0.261 |
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Sep. Now (ρ) |
0.261" |
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Mag pri |
8.59 |
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Mag sec |
9.56 |
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delta mag (ΔM) |
0.97 |
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Spectral class |
A0 (white) |
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Pri motion ra |
+004 |
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Sec motion ra |
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Pri motion dec |
-018 |
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Sec motion dec |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 173196 |
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Constellation |
Serpens |
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SAO |
123862 |
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HIP |
91893 |
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Tycho2 |
0451-00548-1 |
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Gaia DR2 |
4280238139460761728 |
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HD |
173196 |
|
ADS |
11619 |
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BD |
BD+03 3787 |
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Distance |
209.64 |
|
Distance ly |
683.85 |
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ORBITAL ELEMENTS
Period (P) | 330y | |
Periastron (T) | 1942.4y | |
Semi-major axis (a) | 0.453a | |
Eccentricity (e) | 0.85 | |
Inclination (i) | 70.3° | |
Longitude of periastron (ω) | 96° | |
Node (Ω) | 254.7° | |
Notes | | |
Reference | FMR2014c | |
Equinox | 2000 | |
Last observation | 2012 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
122.5 |
0.251 |
2001 |
123.1 |
0.252 |
2002 |
123.7 |
0.252 |
2003 |
124.4 |
0.252 |
2004 |
125.0 |
0.253 |
2005 |
125.6 |
0.253 |
2006 |
126.2 |
0.253 |
2007 |
126.9 |
0.254 |
2008 |
127.5 |
0.254 |
2009 |
128.1 |
0.254 |
2010 |
128.7 |
0.254 |
2011 |
129.3 |
0.255 |
2012 |
129.9 |
0.255 |
2013 |
130.5 |
0.255 |
2014 |
131.2 |
0.255 |
2015 |
131.8 |
0.255 |
2016 |
132.4 |
0.256 |
2017 |
133.0 |
0.256 |
2018 |
133.6 |
0.256 |
2019 |
134.2 |
0.256 |
2020 |
134.8 |
0.257 |
2021 |
135.4 |
0.257 |
2022 |
136.0 |
0.257 |
2023 |
136.6 |
0.257 |
2024 |
137.2 |
0.258 |
2025 |
137.8 |
0.258 |
2026 |
138.4 |
0.258 |
2027 |
139.0 |
0.258 |
2028 |
139.6 |
0.258 |
2029 |
140.2 |
0.259 |
2030 |
140.8 |
0.259 |
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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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