16420+7353 MLR 198 (HD 151746)

 
 
16h 41m 57.22s +73° 53' 14.3" P.A. 51.00 sep 0.2 mag 7.30,7.60 Sp A2 dist. 107.87 pc (351.87 l.y.)
 
 
Coord 2000 16420+7353 Discov num MLR 198 Comp Coord arcsec 2000 16 41 57.22 +73 53 14.3
Date first 1971 Date last 2012 Obs 34
Pa first 36 Pa last 50.8 P.A. Now (θ) 33.6°
Sep first 0.3 Sep last 0.196 Sep. Now (ρ) 0.285"
Mag pri 7.30 Mag sec 7.60 delta mag (ΔM) 0.3 Spectral class A2 (white)
Pri motion ra -015 Sec motion ra
Pri motion dec +041 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 151746 Constellation Draco SAO 8602 HIP 81757
Tycho2 4426-00098-1 HD 151746 GC 22548 BD BD+74 680
Distance 107.87 Distance ly 351.87
 
 
ORBITAL ELEMENTS
 
 
Period (P)51.16y Periastron (T)1993.69y Semi-major axis (a)0.199a
Eccentricity (e)0.542 Inclination (i)135.3° Longitude of periastron (ω)322.4°
Node (Ω)192.7° Notesn ReferenceHrt2014b
Equinox2000 Last observation2009 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 128.6 0.127
2001 118.8 0.134
2002 110.0 0.141
2003 102.1 0.150
2004 95.1 0.159
2005 88.9 0.169
2006 83.4 0.179
2007 78.5 0.188
2008 74.0 0.198
2009 69.9 0.207
2010 66.2 0.217
2011 62.8 0.225
2012 59.7 0.234
2013 56.7 0.242
2014 54.0 0.249
2015 51.3 0.256
2016 48.9 0.262
2017 46.5 0.267
2018 44.2 0.272
2019 42.0 0.276
2020 39.8 0.280
2021 37.7 0.282
2022 35.6 0.284
2023 33.6 0.285
2024 31.5 0.285
2025 29.5 0.284
2026 27.4 0.282
2027 25.3 0.280
2028 23.1 0.276
2029 20.9 0.271
2030 18.6 0.265


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



 
 


wds16420%2B7353c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic