17221-7007 FIN 373 (Iot Aps)

 
 
17h 22m 05.87s -70° 07' 23.5" P.A. 125.00 sep 0.1 mag 5.90,6.46 Sp B9V+B9.5V dist. 404.86 pc (1320.65 l.y.)
 
 
Coord 2000 17221-7007 Discov num FIN 373 Comp Coord arcsec 2000 17 22 05.87 -70 07 23.5
Date first 1960 Date last 2021 Obs 14
Pa first 119 Pa last 125.3 P.A. Now (θ) 125.3°
Sep first 0.1 Sep last 0.083 Sep. Now (ρ) 0.083"
Mag pri 5.90 Mag sec 6.46 delta mag (ΔM) 0.56 Spectral class B9V+B9.5V (blue-white/blue-white)
Pri motion ra -006 Sec motion ra
Pri motion dec -012 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Iot Aps Var name NSV8509 Aps Constellation Apus SAO 257491
HIP 84979 Tycho2 9280-00646-1 Gaia DR2 5810861541976948096 HD 156190
HR 6411 GC 23388 CP CP-69 2719 Bayer Iota Apodis
Bayer name Iot Aps FK5 642 Distance 404.86 Distance ly 1320.65
Bayer greek ι Aps
 
 
ORBITAL ELEMENTS
 
 
Period (P)160y Periastron (T)1998.2y Semi-major axis (a)0.14a
Eccentricity (e)0.203 Inclination (i)104.2° Longitude of periastron (ω)55.3°
Node (Ω)288.2° Notesn ReferenceTok2018b
Equinox2000 Last observation2017 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 263.9 0.058
2001 260.5 0.053
2002 256.4 0.048
2003 251.4 0.044
2004 245.2 0.039
2005 237.5 0.035
2006 227.9 0.032
2007 216.5 0.029
2008 203.7 0.028
2009 190.5 0.029
2010 178.1 0.030
2011 167.4 0.033
2012 158.6 0.037
2013 151.6 0.041
2014 145.9 0.046
2015 141.3 0.051
2016 137.6 0.056
2017 134.4 0.061
2018 131.8 0.066
2019 129.5 0.071
2020 127.6 0.076
2021 125.8 0.081
2022 124.3 0.086
2023 123.0 0.091
2024 121.7 0.095
2025 120.6 0.100
2026 119.6 0.104
2027 118.7 0.108
2028 117.8 0.112
2029 117.0 0.116
2030 116.2 0.120


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


 
  


wds17221-7007g.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic