17240-1142 BU 242 AB (HD 157499)

17h 24m 02.80s -11° 42' 06.9" P.A. 79.00 sep 1.2 mag 8.69,9.48 Sp A2 dist. 3846.15 pc (12546.14 l.y.)

Coord 2000 17240-1142 Discov num BU  242 Comp AB Coord arcsec 2000 17 24 02.80 -11 42 06.9
Date first 1875 Date last 2019 Obs 29
Pa first 69 Pa last 79.4 P.A. Now (θ) 79.4°
Sep first 1.0 Sep last 1.203 Sep. Now (ρ) 1.203"
Mag pri 8.69 Mag sec 9.48 delta mag (ΔM) 0.79 Spectral class A2 (white)
Pri motion ra +000 Sec motion ra +000
Pri motion dec -007 Sec motion dec -007
Notes




Nature of this double is uncertain.



17240-1142 SYSTEM COMPONENTS

Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 157499 160518 17 24 03 -11 42 07 BU 242 AB 2019 29 79 1.2 8.69 9.48 0.79 <===
Show 160518 17 24 03 -11 42 07 BU 242 AC 2017 18 64 9.1 8.71 11.12 2.41
Show 160518 17 24 03 -11 42 07 BU 242 AD 2017 19 61 48.3 8.71 10.53 1.82


Quadruple system
4 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Name HD 157499 Constellation Serpens SAO 160518 HIP 85151
Tycho2 5666-00050-1 Gaia DR2 4141883292802888832 HD 157499 GC 23521
BD BD-11 4367 Distance 3846.15 Distance ly 12546.14