01158+0947 A 2102 (HD 7564)

 
 
01h 15m 46.78s +09° 47' 05.3" P.A. 96.00 sep 0.2 mag 7.36,9.89 Sp F4V dist. 57.41 pc (187.27 l.y.)
 
 
Coord 2000 01158+0947 Discov num A  2102 Comp Coord arcsec 2000 01 15 46.78 +09 47 05.3
Date first 1909 Date last 2016 Obs 33
Pa first 149 Pa last 96.2 P.A. Now (θ) 96.2°
Sep first 0.5 Sep last 0.235 Sep. Now (ρ) 0.235"
Mag pri 7.36 Mag sec 9.89 delta mag (ΔM) 2.53 Spectral class F4V (yellow-white)
Pri motion ra -083 Sec motion ra
Pri motion dec +043 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 7564 Constellation Pisces SAO 109766 HIP 5898
Tycho2 0613-00226-1 Gaia DR2 2579689922143890304 HD 7564 GC 1516
ADS 1016 BD BD+09 142 Distance 57.41 Distance ly 187.27
 
 
ORBITAL ELEMENTS
 
 
Period (P)162y± 13 Periastron (T)2101y± 13 Semi-major axis (a)0.607a± 0.035
Eccentricity (e)0.447± 0.054 Inclination (i)101.7°± 1 Longitude of periastron (ω)262.8°± 6.6
Node (Ω)151.2°± 2.1 Notesn ReferenceRAO2015
Equinox2000 Last observation2012 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 129.3 0.407
2001 128.4 0.397
2002 127.4 0.387
2003 126.4 0.376
2004 125.3 0.366
2005 124.2 0.355
2006 123.0 0.345
2007 121.7 0.334
2008 120.3 0.323
2009 118.8 0.313
2010 117.3 0.302
2011 115.6 0.292
2012 113.8 0.281
2013 111.8 0.271
2014 109.7 0.261
2015 107.4 0.251
2016 105.0 0.242
2017 102.4 0.233
2018 99.5 0.224
2019 96.4 0.216
2020 93.1 0.208
2021 89.6 0.201
2022 85.8 0.195
2023 81.8 0.189
2024 77.5 0.185
2025 73.1 0.181
2026 68.5 0.179
2027 63.8 0.177
2028 59.1 0.177
2029 54.3 0.178
2030 49.7 0.180


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



 
 


wds01158%2B0947b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic