21390+5729 MIU 2 Aa,Ab

 
 
21h 38m 57.61s +57° 29' 20.5" P.A. 196.00 sep 0.1 mag 5.73, Sp O6V+B0:V dist. 787.4 pc (2568.5 l.y.)
 
 
Coord 2000 21390+5729 Discov num MIU   2 Comp Aa,Ab Coord arcsec 2000 21 38 57.61 +57 29 20.5
Date first 1992 Date last 2018 Obs 16
Pa first 248 Pa last 196.1 P.A. Now (θ) 196.1°
Sep first 0.1 Sep last 0.105 Sep. Now (ρ) 0.105"
Mag pri 5.73 Mag sec delta mag (ΔM) Spectral class O6V+B0:V (blue/blue-white)
Pri motion ra -003 Sec motion ra
Pri motion dec -002 Sec motion dec
Notes N (See Notes)
Nature of this double is uncertain.
 
 
21390+5729 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 33626 21 38 58 +57 29 20 MIU 2 Aa,Ab 2018 16 196 0.1 5.73 <===
Show 33626 21 38 58 +57 29 20 BU 1143 AB 2018 9 319 1.8 5.73 13.30 7.57
Show HD 206267 33626 21 38 58 +57 29 20 STF 2816 AC 2018 111 120 11.8 5.73 7.48 1.75
Show 33626 21 38 58 +57 29 20 STF 2816 AD 2018 110 339 20.6 5.73 7.53 1.80
Show 21 38 59 +57 29 15 GUI 36 CD 2018 81 324 30.6 7.48 7.53 0.05
Show 21 38 57 +57 29 39 FLE 3 DE 2015 8 351 55.2 7.53 13.19 5.66
Sextuple system
5 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cepheus SAO 33626 HIP 106890 Tycho2 3975-01822-1
Gaia DR2 2178396937123250432 HD 206267 HR 8281 ADS 15184
BD BD+56 2617 Bayer Pi 1 Cygni Bayer name Pi1 Cyg Flamsteed 80 Cygni
Flamsteed name 80 Cyg FK5 813 Distance 787.4 Distance ly 2568.5
Bayer greek π1 Cyg
Bayer or Flamsteed indentifiers not always match the correct constellation because of procession and proper motion of the star. (Cyg vs Cep)