17221-7007 FIN 373 (Iot Aps)

 
 
17h 22m 05.87s -70 07' 23.5" P.A. 132.2 sep 0.08 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
2017
Obs
12
Pa first
119
Pa last
134
P.A. Now (θ)
132.2°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.08"
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
 
 
Precise pa
133.5
Precise sep
0.064
Name
Iot Aps
Cdsa2 id
FIN 373
Constellation
Apus
SAO
257491
HIP
84979
Tycho2
9280-00646-1
HD
156190
HR
6411
GC
23388
CP
CP-69 2719
Bayer
Iota Apodis
Bayer name
Iot Aps
Ra deg
17.36829722222222
De deg
-70.12319444444444
Distance
404.86
Distance ly
1320.65
last precise pa
133.5
last precise sep
0.064
 
 
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° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2017
label rho theta
2000 0.058 263.9
2001 0.053 260.5
2002 0.048 256.4
2003 0.044 251.4
2004 0.039 245.2
2005 0.035 237.5
2006 0.032 227.9
2007 0.029 216.5
2008 0.028 203.7
2009 0.029 190.5
2010 0.030 178.1
2011 0.033 167.4
2012 0.037 158.6
2013 0.041 151.6
2014 0.046 145.9
2015 0.051 141.3
2016 0.056 137.6
2017 0.061 134.4
2018 0.066 131.8
2019 0.071 129.5
2020 0.076 127.6
2021 0.081 125.8
2022 0.086 124.3
2023 0.091 123.0
2024 0.095 121.7
2025 0.100 120.6
2026 0.104 119.6
2027 0.108 118.7
2028 0.112 117.8
2029 0.116 117.0
2030 0.120 116.2

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

grafico orbita





wds17221-7007g.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
17221-7007 FIN 373 1992 8 290 0.1 5.90 6.46 B9V+B9.5V NO 172205.87-700723.5
17221-7007 FIN 373 2009 9 228 0.0 5.90 6.46 B9V+B9.5V NO 172205.87-700723.5
17221-7007 FIN 373 2014 10 145 0.0 5.90 6.46 B9V+B9.5V NO 172205.87-700723.5
17221-7007 FIN 373 2015 11 140 0.1 5.90 6.46 B9V+B9.5V NO 172205.87-700723.5
17221-7007 FIN 373 2017 12 134 0.1 5.90 6.46 B9V+B9.5V NO 172205.87-700723.5

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