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Doubles in session


Current system
18059+8815
STF 2614


Nearby doubles
142' : 18214+8554
LOC 381

153' : 18243+8544
TDT 837

167' : 18049+8528
HDS2548

216' : 18060+8439
KPP4083

220' : 18014+8436
HU 65AB

240' : 18211+8416
LDS1887

247' : 18039+8409
LDS1883

255' : 18007+8401
LOC 366

261' : 17530+8354
STT 349

264' : 17492+8352
MFL 214

264' : 17578+8351
UC 3457

290' : 17478+8326
TOI1147



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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

18059+8815 STF 2614

 
 
18h 05m 54.14s +88° 15' 11.9" P.A. 217.00 sep 1.5 mag 9.85,10.47 Sp F5
 
 
Coord 2000 18059+8815 Discov num STF2614 Comp Coord arcsec 2000 18 05 54.14 +88 15 11.9
Date first 1831 Date last 2016 Obs 17
Pa first 251 Pa last 217.4 P.A. Now (θ) 217.4°
Sep first 0.8 Sep last 1.506 Sep. Now (ρ) 1.506"
Mag pri 9.85 Mag sec 10.47 delta mag (ΔM) 0.62 Spectral class F5 (yellow-white)
Pri motion ra +003 Sec motion ra +003
Pri motion dec +019 Sec motion dec +019
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Ursa Minor Tycho2 4660-00202-1 Gaia DR2 2305270271030278144 ADS 11578
 
 
ORBITAL ELEMENTS
 
 
Period (P)1553.2821y± 873.0457 Periastron (T)1781.2214y± 148.5951 Semi-major axis (a)2.61765a± 3.04766
Eccentricity (e)0.78128± 0.20872 Inclination (i)92.1°± 2.107 Longitude of periastron (ω)94.543°± 15.902
Node (Ω)42.271°± 4.74 Notes ReferenceIzm2019
Equinox Last observation2015 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 218.8 1.443
2001 218.7 1.442
2002 218.7 1.441
2003 218.7 1.439
2004 218.7 1.438
2005 218.7 1.437
2006 218.7 1.435
2007 218.6 1.434
2008 218.6 1.432
2009 218.6 1.431
2010 218.6 1.429
2011 218.6 1.428
2012 218.6 1.426
2013 218.5 1.425
2014 218.5 1.423
2015 218.5 1.422
2016 218.5 1.420
2017 218.5 1.418
2018 218.4 1.417
2019 218.4 1.415
2020 218.4 1.413
2021 218.4 1.412
2022 218.4 1.410
2023 218.4 1.408
2024 218.3 1.407
2025 218.3 1.405
2026 218.3 1.403
2027 218.3 1.401
2028 218.3 1.400
2029 218.2 1.398
2030 218.2 1.396


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


 
  


wds18059%2B8815a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic