16094-3103 I 557 (HD 144926)
16h 09m 26.97s -31° 03' 11.2" P.A. 19.00 sep 0.3 mag 7.80,8.20 Sp A7IV
Coord 2000 |
16094-3103 |
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Discov num |
I 557 |
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Comp |
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Coord arcsec 2000 |
16 09 26.97 -31 03 11.2 |
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Date first |
1909 |
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Date last |
2019 |
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Obs |
24 |
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Pa first |
20 |
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Pa last |
19.3 |
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P.A. Now (θ) |
19.3° |
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Sep first |
0.5 |
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Sep last |
0.278 |
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Sep. Now (ρ) |
0.278" |
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Mag pri |
7.80 |
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Mag sec |
8.20 |
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delta mag (ΔM) |
0.4 |
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Spectral class |
A7IV (white) |
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Pri motion ra |
-069 |
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Sec motion ra |
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Pri motion dec |
-074 |
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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 144926 |
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Constellation |
Scorpius |
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SAO |
207395 |
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Tycho2 |
7330-02616-1 |
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Gaia DR2 |
6036781288524608896 |
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HD |
144926 |
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GC |
21711 |
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ORBITAL ELEMENTS
Period (P) | 136.2y | ± 10 |
Periastron (T) | 2034y | ± 3 |
Semi-major axis (a) | 0.62a | ± 0.05 |
Eccentricity (e) | 0.726 | ± 0.08 |
Inclination (i) | 85.9° | ± 1 |
Longitude of periastron (ω) | 248.4° | ± 4.5 |
Node (Ω) | 26.3° | ± 1 |
Notes | | |
Reference | Doc2018l | |
Equinox | 2000 | |
Last observation | 2018 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
144.5 |
0.071 |
2001 |
153.7 |
0.077 |
2002 |
161.3 |
0.085 |
2003 |
167.5 |
0.095 |
2004 |
172.5 |
0.105 |
2005 |
176.6 |
0.116 |
2006 |
180.0 |
0.127 |
2007 |
182.9 |
0.138 |
2008 |
185.3 |
0.149 |
2009 |
187.4 |
0.161 |
2010 |
189.2 |
0.172 |
2011 |
190.8 |
0.184 |
2012 |
192.2 |
0.195 |
2013 |
193.4 |
0.206 |
2014 |
194.5 |
0.217 |
2015 |
195.5 |
0.227 |
2016 |
196.5 |
0.237 |
2017 |
197.3 |
0.247 |
2018 |
198.1 |
0.256 |
2019 |
198.8 |
0.265 |
2020 |
199.5 |
0.272 |
2021 |
200.2 |
0.279 |
2022 |
200.8 |
0.285 |
2023 |
201.4 |
0.289 |
2024 |
202.0 |
0.292 |
2025 |
202.6 |
0.292 |
2026 |
203.2 |
0.291 |
2027 |
203.8 |
0.286 |
2028 |
204.4 |
0.277 |
2029 |
205.1 |
0.264 |
2030 |
205.9 |
0.244 |
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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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