16578+1317 HDS 2399

 
 
16h 57m 46.09s +13° 17' 29.2" P.A. 237.00 sep 0.2 mag 10.90,13.09 Sp M0 dist. 40.8 pc (133.09 l.y.)
 
 
Coord 2000 16578+1317 Discov num HDS2399 Comp Coord arcsec 2000 16 57 46.09 +13 17 29.2
Date first 1991 Date last 2021 Obs 12
Pa first 290 Pa last 237.1 P.A. Now (θ) 237.1°
Sep first 0.6 Sep last 0.211 Sep. Now (ρ) 0.211"
Mag pri 10.90 Mag sec 13.09 delta mag (ΔM) 2.19 Spectral class M0 (red)
Pri motion ra +047 Sec motion ra
Pri motion dec +072 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Hercules HIP 83010 Tycho2 0987-00811-1 Gaia DR2 4449182460449707904
GL Gl 647 Distance 40.8 Distance ly 133.09
 
 
ORBITAL ELEMENTS
 
 
Period (P)45.379y Periastron (T)2018.8y Semi-major axis (a)0.384a
Eccentricity (e)0.83 Inclination (i)29.6° Longitude of periastron (ω)100.7°
Node (Ω)14.1° Notesn ReferenceTok2018e
Equinox2000 Last observation2018 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 302.2 0.606
2001 303.8 0.600
2002 305.4 0.593
2003 307.0 0.584
2004 308.7 0.573
2005 310.5 0.560
2006 312.4 0.545
2007 314.3 0.529
2008 316.4 0.510
2009 318.7 0.489
2010 321.2 0.465
2011 324.0 0.439
2012 327.1 0.409
2013 330.8 0.376
2014 335.3 0.338
2015 340.9 0.295
2016 348.8 0.245
2017 1.2 0.184
2018 29.2 0.108
2019 148.2 0.064
2020 212.7 0.138
2021 232.8 0.201
2022 243.9 0.253
2023 251.5 0.297
2024 257.1 0.337
2025 261.6 0.372
2026 265.4 0.403
2027 268.7 0.431
2028 271.6 0.457
2029 274.1 0.480
2030 276.5 0.501


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



 
 


wds16578%2B1317a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic