17420+1557 BU 1251 AB (HD 160910)

 
 
17h 41m 58.64s +15° 57' 07.8" P.A. 102.00 sep 1.4 mag 5.59,9.38 Sp F3IV dist. 34.86 pc (113.71 l.y.)
 
 
Coord 2000 17420+1557 Discov num BU 1251 Comp AB Coord arcsec 2000 17 41 58.64 +15 57 07.8
Date first 1891 Date last 2016 Obs 43
Pa first 79 Pa last 101.7 P.A. Now (θ) 101.7°
Sep first 1.4 Sep last 1.426 Sep. Now (ρ) 1.426"
Mag pri 5.59 Mag sec 9.38 delta mag (ΔM) 3.79 Spectral class F3IV (yellow-white)
Pri motion ra +001 Sec motion ra -007
Pri motion dec +114 Sec motion dec +103
Notes O (Orbital solution)
rPM=0.119 (< 0.3, Physical double)
This double is physical.
 
 
17420+1557 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 160910 103033 17 41 59 +15 57 08 BU 1251 AB 2016 43 102 1.4 5.59 9.38 3.79 Y <===
Show 103033 17 41 59 +15 57 08 BU 1251 AC 2015 6 271 154.7 5.59 14.46 8.87
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 160910 Constellation Hercules SAO 103033 HIP 86623
Tycho2 1551-02120-1 Gaia DR2 4548845321128406528 HD 160910 HR 6594
GC 24009 ADS 10723 BD BD+16 3256 Distance 34.86
Distance ly 113.71
 
 
ORBITAL ELEMENTS
 
 
Period (P)144y Periastron (T)1949.64y Semi-major axis (a)1.04a
Eccentricity (e)0.42 Inclination (i)148.3° Longitude of periastron (ω)150°
Node (Ω)67° Notesn ReferenceBaz1991a
Equinox Last observation1989 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 118.0 1.244
2001 116.7 1.256
2002 115.4 1.268
2003 114.1 1.280
2004 112.9 1.291
2005 111.6 1.302
2006 110.4 1.313
2007 109.2 1.323
2008 108.0 1.333
2009 106.8 1.343
2010 105.7 1.352
2011 104.6 1.360
2012 103.4 1.368
2013 102.3 1.376
2014 101.2 1.384
2015 100.1 1.391
2016 99.1 1.397
2017 98.0 1.403
2018 96.9 1.409
2019 95.9 1.414
2020 94.9 1.418
2021 93.8 1.423
2022 92.8 1.426
2023 91.8 1.429
2024 90.7 1.432
2025 89.7 1.434
2026 88.7 1.436
2027 87.7 1.437
2028 86.7 1.438
2029 85.7 1.438
2030 84.7 1.437


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



 
 


wds17420%2B1557a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic