15462-2804 BU 620 AB (HD 140722)

 
 
15h 46m 12.89s -28° 03' 41.1" P.A. 355.00 sep 0.7 mag 7.58,7.03 Sp F2IV dist. 71.12 pc (231.99 l.y.)
 
 
Coord 2000 15462-2804 Discov num BU  620 Comp AB Coord arcsec 2000 15 46 12.89 -28 03 41.1
Date first 1878 Date last 2021 Obs 65
Pa first 167 Pa last 354.5 P.A. Now (θ) 354.5°
Sep first 0.9 Sep last 0.65 Sep. Now (ρ) 0.65"
Mag pri 7.58 Mag sec 7.03 delta mag (ΔM) 0.55 Spectral class F2IV (yellow-white)
Pri motion ra -060 Sec motion ra -060
Pri motion dec -019 Sec motion dec -019
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
15462-2804 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 183772 15 46 13 -28 03 41 CHR 50 Aa,Ab 2006 4 287 0.1 6.61
Show HD 140722 183772 15 46 13 -28 03 41 BU 620 AB 2021 65 355 0.7 7.58 7.03 0.55 Y <===
Show 183772 15 46 13 -28 03 41 HJ 4803 AC 2016 26 213 50.5 7.58 8.97 1.39
Show 15 46 11 -28 04 23 KOH 49 Ca,Cb 2021 10 187 0.1 8.00 8.70 0.70 Y
Quintuple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 140722 Constellation Libra SAO 183772 HIP 77235
Tycho2 6786-02143-1 Gaia DR2 6233447046421213056 HD 140722 HR 5856
GC 21182 ADS 9775 CD CD-2710550 CP CP-27 5250
Distance 71.12 Distance ly 231.99
 
 
ORBITAL ELEMENTS
 
 
Period (P)700y Periastron (T)2175.65y Semi-major axis (a)1.5a
Eccentricity (e)0.859 Inclination (i)86.3° Longitude of periastron (ω)89.5°
Node (Ω)6.3° Notesn ReferenceTok2021c
Equinox2000 Last observation2021 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 352.3 0.597
2001 352.5 0.600
2002 352.6 0.603
2003 352.7 0.605
2004 352.8 0.608
2005 352.9 0.610
2006 353.0 0.613
2007 353.1 0.616
2008 353.2 0.618
2009 353.3 0.621
2010 353.4 0.623
2011 353.5 0.626
2012 353.6 0.629
2013 353.7 0.631
2014 353.8 0.634
2015 353.9 0.636
2016 353.9 0.638
2017 354.0 0.641
2018 354.1 0.643
2019 354.2 0.646
2020 354.3 0.648
2021 354.4 0.651
2022 354.5 0.653
2023 354.6 0.655
2024 354.7 0.658
2025 354.8 0.660
2026 354.9 0.662
2027 354.9 0.665
2028 355.0 0.667
2029 355.1 0.669
2030 355.2 0.672


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



 
 


wds15462-2804a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic