17053+5428 BU 1088 BC

 
 
17h 05m 20.24s +54° 28' 14.1" P.A. 179.00 sep 11.0 mag 5.69,13.70 Sp F7V dist. 27.43 pc (89.48 l.y.)
 
 
Coord 2000 17053+5428 Discov num BU 1088 Comp BC Coord arcsec 2000 17 05 20.24 +54 28 14.1
Date first 1889 Date last 2020 Obs 14
Pa first 191 Pa last 178.6 P.A. Now (θ) 178.6°
Sep first 12.3 Sep last 10.98 Sep. Now (ρ) 10.98"
Mag pri 5.69 Mag sec 13.70 delta mag (ΔM) 8.01 Spectral class F7V (yellow-white)
Pri motion ra -068 Sec motion ra -075
Pri motion dec +089 Sec motion dec +089
Notes N V (See Notes, Proper motion indicates physical)
rPM=0.06 (< 0.3, Physical double)
This double is physical.
 
 
17053+5428 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Alrakis 30239 17 05 20 +54 28 14 STF 2130 AB 2020 831 358 2.5 5.66 5.69 0.03 Y
Show 30239 17 05 20 +54 28 14 BU 1088 AC 2015 6 174 12.2 5.66 13.70 8.04
Show 30239 17 05 20 +54 28 14 BU 1088 BC 2020 14 179 11.0 5.69 13.70 8.01 Y <===
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Draco SAO 30239 HIP 83608 Tycho2 3890-01396-1
Gaia DR2 1420101696285626624 HD 154905 HR 6369 GC 23092
ADS 10345 GL Wo 9584B BD BD+54 1857 Bayer Mu Draconis
Bayer name Mu Dra Flamsteed 21 Draconis Flamsteed name 21 Dra Distance 27.43
Distance ly 89.48 Bayer greek μ Dra
 
 
SUSPECTED ORBITAL ELEMENTS
 
 
Identifier17053+5428 STF2130 B
coord_arcsec_2000170520.24+542814.1
Period (P)3.2y Periastron (T)1915.4y Semi-major axis (a)0.026a
Eccentricity (e)0.4 Inclination (i)83.5° Longitude of periastron (ω)272.6°
Node (Ω)134.1° Notesn ReferenceStr1943
Equinox1900 Last observation1942 Grade9(1=Definitive, 9=Indet.)
label theta rho
2000 172.9 0.006
2001 308.8 0.023
2002 129.6 0.015
2003 152.2 0.012
2004 305.4 0.020
2005 66.0 0.002
2006 144.6 0.017
2007 300.0 0.015
2008 319.5 0.014
2009 140.4 0.021
2010 288.3 0.009
2011 314.5 0.022
2012 137.3 0.023
2013 246.0 0.004
2014 311.6 0.024
2015 134.3 0.022
2016 172.9 0.006
2017 308.8 0.023
2018 129.6 0.015
2019 152.2 0.012
2020 305.4 0.020
2021 66.0 0.002
2022 144.6 0.017
2023 300.0 0.015
2024 319.5 0.014
2025 140.4 0.021
2026 288.3 0.009
2027 314.5 0.022
2028 137.3 0.023
2029 246.0 0.004
2030 311.6 0.024


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



 
 


wds17053%2B5428r.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic