13539-1440 RST 3852 (HD 121136)

13h 53m 51.68s -14° 39' 50.8" P.A. 334.00 sep 0.2 mag 7.85,8.92 Sp F0/2V dist. 131.58 pc (429.21 l.y.)

Coord 2000 13539-1440 Discov num RST3852 Comp Coord arcsec 2000 13 53 51.68 -14 39 50.8
Date first 1937 Date last 2018 Obs 32
Pa first 140 Pa last 333.6 P.A. Now (θ) 325.7°
Sep first 0.3 Sep last 0.249 Sep. Now (ρ) 0.277"
Mag pri 7.85 Mag sec 8.92 delta mag (ΔM) 1.07 Spectral class F0/2V (yellow-white)
Pri motion ra +021 Sec motion ra
Pri motion dec -018 Sec motion dec
Notes N O (See Notes, Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 121136 Constellation Virgo SAO 158220 HIP 67850
Tycho2 5559-00643-1 Gaia DR2 6302015585120003712 HD 121136 BD BD-13 3786
Distance 131.58 Distance ly 429.21




ORBITAL ELEMENTS

Period (P)95y Periastron (T)1985.8y Semi-major axis (a)0.225a
Eccentricity (e)0.278 Inclination (i)128.9° Longitude of periastron (ω)31.2°
Node (Ω)150.6° Notesn ReferenceHrt2010a
Equinox2000 Last observation2009 Grade3(1=Definitive, 9=Indet.)

label theta rho
2000 23.1 0.144
2001 17.9 0.153
2002 13.2 0.162
2003 9.0 0.170
2004 5.2 0.179
2005 1.8 0.188
2006 358.6 0.197
2007 355.8 0.205
2008 353.1 0.213
2009 350.7 0.220
2010 348.4 0.228
2011 346.2 0.234
2012 344.1 0.240
2013 342.2 0.246
2014 340.3 0.251
2015 338.5 0.256
2016 336.8 0.260
2017 335.1 0.264
2018 333.5 0.268
2019 331.9 0.270
2020 330.3 0.273
2021 328.7 0.275
2022 327.2 0.276
2023 325.7 0.277
2024 324.2 0.278
2025 322.7 0.278
2026 321.2 0.277
2027 319.7 0.277
2028 318.2 0.276
2029 316.7 0.274
2030 315.1 0.272


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



 
 


wds13539-1440a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic