18410+2450 A 2988 (HD 172743)
18h 40m 59.63s +24° 49' 30.3" P.A. 210.00 sep 0.1 mag 8.08,9.08 Sp F0V dist. 222.22 pc (724.88 l.y.)
Coord 2000 |
18410+2450 |
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Discov num |
A 2988 |
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Comp |
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Coord arcsec 2000 |
18 40 59.63 +24 49 30.3 |
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Date first |
1916 |
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Date last |
2018 |
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Obs |
63 |
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Pa first |
12 |
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Pa last |
210.1 |
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P.A. Now (θ) |
207.1° |
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Sep first |
0.2 |
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Sep last |
0.14 |
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Sep. Now (ρ) |
0.157" |
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Mag pri |
8.08 |
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Mag sec |
9.08 |
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delta mag (ΔM) |
1 |
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Spectral class |
F0V (yellow-white) |
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Pri motion ra |
-004 |
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Sec motion ra |
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Pri motion dec |
+005 |
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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 172743 |
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Constellation |
Hercules |
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SAO |
86316 |
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HIP |
91609 |
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Tycho2 |
2111-00370-1 |
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Gaia DR2 |
4535929465420195456 |
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HD |
172743 |
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ADS |
11574 |
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BD |
BD+24 3493 |
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Distance |
222.22 |
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Distance ly |
724.88 |
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ORBITAL ELEMENTS
Period (P) | 57.172y | ± 1.168 |
Periastron (T) | 1941.464y | ± 1.52 |
Semi-major axis (a) | 0.102a | ± 0.019 |
Eccentricity (e) | 0.688 | ± 0.101 |
Inclination (i) | 154.7° | ± 19 |
Longitude of periastron (ω) | 306.8° | ± 11.5 |
Node (Ω) | 329.6° | ± 9.7 |
Notes | | |
Reference | FMR2010f | |
Equinox | 2000 | |
Last observation | 1995 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
327.2 |
0.039 |
2001 |
303.9 |
0.048 |
2002 |
287.9 |
0.056 |
2003 |
276.2 |
0.065 |
2004 |
267.2 |
0.073 |
2005 |
259.9 |
0.081 |
2006 |
253.9 |
0.088 |
2007 |
248.7 |
0.095 |
2008 |
244.2 |
0.101 |
2009 |
240.3 |
0.107 |
2010 |
236.7 |
0.113 |
2011 |
233.5 |
0.118 |
2012 |
230.5 |
0.123 |
2013 |
227.8 |
0.128 |
2014 |
225.2 |
0.132 |
2015 |
222.8 |
0.136 |
2016 |
220.6 |
0.140 |
2017 |
218.4 |
0.143 |
2018 |
216.4 |
0.146 |
2019 |
214.4 |
0.149 |
2020 |
212.5 |
0.151 |
2021 |
210.6 |
0.154 |
2022 |
208.8 |
0.156 |
2023 |
207.1 |
0.157 |
2024 |
205.4 |
0.159 |
2025 |
203.7 |
0.160 |
2026 |
202.0 |
0.161 |
2027 |
200.4 |
0.162 |
2028 |
198.7 |
0.162 |
2029 |
197.1 |
0.162 |
2030 |
195.4 |
0.162 |
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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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