15493+6032 HU 912 (HD 142089)

 
 
15h 49m 15.70s +60° 31' 38.5" P.A. 141.00 sep 0.3 mag 8.60,9.01 Sp F5 dist. 94.07 pc (306.86 l.y.)
 
 
Coord 2000 15493+6032 Discov num HU  912 Comp Coord arcsec 2000 15 49 15.70 +60 31 38.5
Date first 1905 Date last 2014 Obs 60
Pa first 138 Pa last 141 P.A. Now (θ) 148.9°
Sep first 0.3 Sep last 0.325 Sep. Now (ρ) 0.34"
Mag pri 8.60 Mag sec 9.01 delta mag (ΔM) 0.41 Spectral class F5 (yellow-white)
Pri motion ra -091 Sec motion ra
Pri motion dec +021 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 142089 Constellation Draco SAO 16860 HIP 77482
Tycho2 4182-00450-1 HD 142089 ADS 9806 BD BD+60 1637
Distance 94.07 Distance ly 306.86
 
 
ORBITAL ELEMENTS
 
 
Period (P)109y Periastron (T)1988.5y Semi-major axis (a)0.32a
Eccentricity (e)0.67 Inclination (i)54° Longitude of periastron (ω)260°
Node (Ω)102° Notesn ReferenceHei1996c
Equinox2000 Last observation Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 114.0 0.255
2001 116.2 0.264
2002 118.2 0.273
2003 120.2 0.281
2004 122.0 0.288
2005 123.7 0.295
2006 125.4 0.300
2007 127.0 0.306
2008 128.6 0.310
2009 130.1 0.315
2010 131.5 0.318
2011 133.0 0.322
2012 134.4 0.325
2013 135.8 0.328
2014 137.1 0.330
2015 138.5 0.332
2016 139.8 0.334
2017 141.1 0.335
2018 142.4 0.337
2019 143.7 0.338
2020 145.0 0.339
2021 146.3 0.339
2022 147.6 0.340
2023 148.9 0.340
2024 150.2 0.340
2025 151.4 0.340
2026 152.7 0.340
2027 154.0 0.340
2028 155.3 0.339
2029 156.5 0.339
2030 157.8 0.338


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



 
 


wds15493%2B6032a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic