15481-2513 HDS2226

 
 
15h 48m 03.31s -25 12' 56.0" P.A. 56.50 sep 0.1 mag 7.60,8.49 Sp A0V dist. 151.52 pc (494.26 l.y.)
 
 
Coord 2000
15481-2513
Discov num
HDS2226
Comp
Coord arcsec 2000
15 48 03.31 -25 12 56.0
Date first
1991
Date last
2020
Obs
9
Pa first
51
Pa last
60
P.A. Now (θ)
56.5°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.15"
Mag pri
7.60
Mag sec
8.49
delta mag (ΔM)
0.89
Spectral class
A0V (white)
Pri motion ra
-019
Sec motion ra
Pri motion dec
-026
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
59.7
Precise sep
0.147
Constellation
Scorpius
SAO
183802
HIP
77399
Tycho2
6782-02146-1
Gaia DR2
6236641647392716544
HD
141091
CD
CD-2412296
CP
CP-24 5561
Distance
151.52
Distance ly
494.26
last precise pa
59.7
last precise sep
0.147
 
 
ORBITAL ELEMENTS
 
 
Period (P)31.1y± 1 Periastron (T)2010.38y± 0.6 Semi-major axis (a)0.106a± 0.008
Eccentricity (e)0.499± 0.159 Inclination (i)140.8°± 19.4 Longitude of periastron (ω)204.7°± 20.1
Node (Ω)57.7°± 11.7 Note Grade3(1=Definitive, 9=Indet.)
Equinox Last observation2018
label rho theta
2000 0.128 15.8
2001 0.120 10.2
2002 0.111 3.7
2003 0.102 356.0
2004 0.093 346.8
2005 0.083 335.4
2006 0.074 321.2
2007 0.067 303.6
2008 0.062 282.5
2009 0.058 258.2
2010 0.053 230.2
2011 0.048 196.0
2012 0.049 157.6
2013 0.059 126.7
2014 0.074 106.6
2015 0.089 93.3
2016 0.103 83.8
2017 0.115 76.5
2018 0.126 70.4
2019 0.134 65.3
2020 0.142 60.7
2021 0.147 56.5
2022 0.151 52.6
2023 0.154 48.8
2024 0.155 45.2
2025 0.155 41.5
2026 0.153 37.8
2027 0.150 34.0
2028 0.147 30.1
2029 0.142 25.9
2030 0.136 21.4


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.



 
 


wds15481-2513a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
15481-2513 HDS2226 1991 1 51 0.1 7.60 8.49 A0V 154803.31-251256.0
15481-2513 HDS2226 2012 3 155 0.1 7.60 8.49 A0V 154803.31-251256.0
15481-2513 HDS2226 2016 5 83 0.1 7.60 8.49 A0V 154803.31-251256.0
15481-2513 HDS2226 2018 6 69 0.1 7.60 8.49 A0V 154803.31-251256.0
15481-2513 HDS2226 2019 8 64 0.1 7.60 8.49 A0V O 154803.31-251256.0

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