15370+6426 HU 1168 (HD 139905)

 
 
15h 37m 00.37s +64° 26' 23.3" P.A. 290.00 sep 0.6 mag 9.48,9.73 Sp G5 dist. 55.71 pc (181.73 l.y.)
 
 
Coord 2000 15370+6426 Discov num HU 1168 Comp Coord arcsec 2000 15 37 00.37 +64 26 23.3
Date first 1905 Date last 2016 Obs 39
Pa first 318 Pa last 290.3 P.A. Now (θ) 283.1°
Sep first 0.3 Sep last 0.554 Sep. Now (ρ) 0.498"
Mag pri 9.48 Mag sec 9.73 delta mag (ΔM) 0.25 Spectral class G5 (yellow)
Pri motion ra -001 Sec motion ra
Pri motion dec +039 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 139905 Constellation Draco SAO 16785 HIP 76466
Tycho2 4184-00297-1 Gaia DR2 1641284849807400064 HD 139905 ADS 9730
BD BD+64 1081 Distance 55.71 Distance ly 181.73
 
 
ORBITAL ELEMENTS
 
 
Period (P)88.57y± 0.7 Periastron (T)1984.44y± 0.09 Semi-major axis (a)0.376a± 0.06
Eccentricity (e)0.599± 0.006 Inclination (i)122.7°± 2 Longitude of periastron (ω)47.7°± 18.5
Node (Ω)127.8°± 11 Notesn ReferenceDoc2009g
Equinox2000 Last observation1997 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 307.7 0.405
2001 306.3 0.419
2002 304.9 0.431
2003 303.6 0.443
2004 302.4 0.453
2005 301.2 0.463
2006 300.0 0.471
2007 298.9 0.479
2008 297.9 0.485
2009 296.8 0.491
2010 295.8 0.496
2011 294.8 0.500
2012 293.8 0.503
2013 292.8 0.506
2014 291.9 0.508
2015 290.9 0.509
2016 289.9 0.510
2017 289.0 0.510
2018 288.0 0.509
2019 287.1 0.508
2020 286.1 0.506
2021 285.1 0.504
2022 284.1 0.501
2023 283.1 0.498
2024 282.1 0.494
2025 281.1 0.490
2026 280.1 0.485
2027 279.0 0.480
2028 277.9 0.475
2029 276.8 0.469
2030 275.6 0.463


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



 
 


wds15370%2B6426b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic