20181+4044 STF2666AB

 
 
20h 18m 06.99s +40 43' 55.6" P.A. 246 sep 2.7 mag 5.96,8.24 Sp O9V+B1.5V dist. 595.24 pc (1941.67 l.y.)
 
 
Coord 2000
20181+4044
Discov num
STF2666
Comp
AB
Coord arcsec 2000
20 18 06.99 +40 43 55.6
Date first
1831
Date last
2013
Obs
81
Pa first
242
Pa last
246
P.A. Now (θ)
246°
Sep first
2.7
Sep last
2.7
Sep. Now (ρ)
2.7"
Mag pri
5.96
Mag sec
8.24
delta mag (ΔM)
2.28
Spectral class
O9V+B1.5V (blue/blue-white)
Pri motion ra
+001
Sec motion ra
+001
Pri motion dec
-010
Sec motion dec
-010
Notes
N (See Notes)
Nature of this double is uncertain.
 
 
20181+4044 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 49438 20181+4044 CHR 96 Aa,Ab 1985 2010 25 178 0.0 6.60 6.80 0.20 Y
Show 20181+4044 STF2666 AB 1831 2013 81 246 2.7 5.96 8.24 2.28 <===
Show 20181+4044 STF2666 AC 1887 2006 13 207 34.0 5.96 10.70 4.74
Show 20181+4044 TAR 5 AD 1887 2006 8 181 49.6 5.96 11.00 5.04
Show 20181+4044 STF2666 CD 1892 2018 9 143 24.1 10.70 11.00 0.30
Quintuple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
245.8
Precise sep
2.74
Constellation
Cygnus
SAO
49438
HIP
100069
Tycho2
3155-02321-1
Gaia DR2
26011542272
HD
193322
HR
7767
BD
BD+40 4103
Distance
595.24
Distance ly
1941.67
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20181+4044 STF2666 AB 2006 70 246 2.9 5.80 8.24 O9V D 201806.99+404355.6
20181+4044 STF2666 AB 2007 76 245 2.8 5.80 8.24 O9V+B1.5V N D 201806.99+404355.6
20181+4044 STF2666 AB 2008 77 245 2.7 5.80 8.24 O9V+B1.5V N D 201806.99+404355.6
20181+4044 STF2666 AB 2011 79 245 2.8 5.80 8.24 O9V B1.5V N D 201806.99+404355.6
20181+4044 STF2666 AB 2013 79 246 2.7 5.80 8.24 O9V B1.5V N D 201806.99+404355.6

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