16542-4139 SNA 53 Aa,Ab

 
 
16h 54m 11.52s -41° 38' 30.9" P.A. 1.00 sep 0.0 mag 6.90,8.30 Sp O9.5III
 
 
Coord 2000 16542-4139 Discov num SNA  53 Comp Aa,Ab Coord arcsec 2000 16 54 11.52 -41 38 30.9
Date first 2010 Date last 2014 Obs 15
Pa first 39 Pa last 1.1 P.A. Now (θ) 1.1°
Sep first 0.0 Sep last 0.001 Sep. Now (ρ) 0.001"
Mag pri 6.90 Mag sec 8.30 delta mag (ΔM) 1.4 Spectral class O9.5III (blue)
Pri motion ra +000 Sec motion ra
Pri motion dec -001 Sec motion dec
Notes N V K (See Notes, Proper motion indicates physical, K-band or other infrared magnitudes)
Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
 
 
16542-4139 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 227384 16 54 12 -41 38 31 SNA 53 Aa,Ab 2014 15 1 0.0 6.90 8.30 1.40 Y <===
Show 227384 16 54 12 -41 38 31 SNA 53 AB 2012 1 313 3.2 6.59 13.83 7.24
Show 227384 16 54 12 -41 38 31 SNA 53 AC 2012 1 22 5.1 6.59 12.65 6.06
Quadruple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Scorpius SAO 227384 Tycho2 7876-02339-1 Gaia DR2 5966524419650392832
HD 152247
 
 
ORBITAL ELEMENTS
 
 
Period (P)581.71d± 0.7 Periastron (T)71266d (2053.996y)± 19 Semi-major axis (a)2.871m± 0.065
Eccentricity (e)0.593± 0.015 Inclination (i)76.8°± 2.8 Longitude of periastron (ω)144.6°± 2.4
Node (Ω)47.4°± 2.6 Notes ReferenceLeB2017
Equinox Last observation Grade5(1=Definitive, 9=Indet.)
label theta rho
2000-01-01 257.9 0.001
2001-01-01 45.9 0.004
2002-01-01 30.6 0.003
2003-01-01 198.3 0.001
2004-01-01 41.9 0.004
2005-01-01 14.4 0.001
2006-01-01 53.3 0.002
2007-01-01 37.9 0.004
2008-01-01 277.1 0.001
2009-01-01 46.7 0.004
2010-01-01 32.2 0.003
2011-01-01 220.3 0.001
2012-01-01 42.7 0.004
2013-01-01 19.6 0.002
2014-01-01 55.9 0.002
2015-01-01 38.8 0.004
2016-01-01 305.3 0.001
2017-01-01 47.7 0.004
2018-01-01 33.6 0.003
2019-01-01 229.3 0.001
2020-01-01 43.4 0.004
2021-01-01 23.4 0.002
2022-01-01 60.0 0.002
2023-01-01 39.6 0.004
2024-01-01 334.1 0.001
2025-01-01 48.7 0.003
2026-01-01 34.8 0.003
2027-01-01 236.7 0.001
2028-01-01 44.2 0.004
2029-01-01 26.3 0.002
2030-01-01 68.4 0.001


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



 
 


wds16542-4139a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic