18455+0530 FIN 332 Aa,Ab

18h 45m 28.36s +05° 30' 00.4" P.A. 142.00 sep 0.0 mag 6.91,7.31 Sp A1V+A1V dist. 188.68 pc (615.47 l.y.)

Coord 2000 18455+0530 Discov num FIN 332 Comp Aa,Ab Coord arcsec 2000 18 45 28.36 +05 30 00.4
Date first 1953 Date last 2021 Obs 75
Pa first 317 Pa last 141.7 P.A. Now (θ) 339.6°
Sep first 0.2 Sep last 0.014 Sep. Now (ρ) 0.032"
Mag pri 6.91 Mag sec 7.31 delta mag (ΔM) 0.4 Spectral class A1V+A1V (white/white)
Pri motion ra -005 Sec motion ra
Pri motion dec +003 Sec motion dec
Notes N O (See Notes, Orbital solution)




This double is physical.



18455+0530 SYSTEM COMPONENTS

Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 123886 18 45 28 +05 30 00 FIN 332 Aa,Ab 2021 75 142 0.0 6.91 7.31 0.40 Y <===
Show HD 173495 123886 18 45 28 +05 30 00 STF 2375 AB 2019 307 120 2.6 6.34 6.73 0.39 Y
Show 123886 18 45 28 +05 30 00 FIN 332 Ba,Bb 2021 58 324 0.1 7.48 7.48 0.00 Y


Quadruple system
2 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Constellation Serpens SAO 123886 HIP 92027 Tycho2 0456-01022-2
Gaia DR2 4285283042432285568 HD 173495 HR 7048 ADS 11640
BD BD+05 3941 Distance 188.68 Distance ly 615.47




ORBITAL ELEMENTS

Period (P)27.62y± 0.16 Periastron (T)1994y± 0.23 Semi-major axis (a)0.0911a± 0.0009
Eccentricity (e)0.82± 0.012 Inclination (i)107.9°± 1.2 Longitude of periastron (ω)4.6°± 4.1
Node (Ω)136°± 1.2 Notesn ReferenceTok2020k
Equinox Last observation Grade2(1=Definitive, 9=Indet.)

label theta rho
2000 321.1 0.123
2001 320.0 0.134
2002 319.0 0.143
2003 318.1 0.151
2004 317.3 0.157
2005 316.6 0.161
2006 315.8 0.164
2007 315.1 0.165
2008 314.5 0.165
2009 313.7 0.164
2010 313.0 0.161
2011 312.3 0.157
2012 311.5 0.151
2013 310.6 0.144
2014 309.6 0.135
2015 308.5 0.124
2016 307.1 0.111
2017 305.3 0.096
2018 302.8 0.079
2019 298.7 0.058
2020 288.9 0.033
2021 212.3 0.009
2022 90.4 0.009
2023 339.6 0.032
2024 329.8 0.059
2025 326.0 0.082
2026 323.6 0.100
2027 322.0 0.115
2028 320.7 0.127
2029 319.6 0.138
2030 318.7 0.147


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



 
 


wds18455%2B0530o.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic