20181+4044 TAR   5AD

 
 
20h 18m 06.99s +40 43' 55.6" P.A. 181 sep 49.6 mag 5.96,11.00 Sp O9V+B9V dist. 595.24 pc (1941.67 l.y.)
 
 
Coord 2000
20181+4044
Discov num
TAR   5
Comp
AD
Coord arcsec 2000
20 18 06.99 +40 43 55.6
Date first
1887
Date last
2006
Obs
8
Pa first
182
Pa last
181
P.A. Now (θ)
181°
Sep first
49.4
Sep last
49.6
Sep. Now (ρ)
49.6"
Mag pri
5.96
Mag sec
11.00
delta mag (ΔM)
5.04
Spectral class
O9V+B9V (blue/blue-white)
Pri motion ra
-003
Sec motion ra
-002
Pri motion dec
-007
Sec motion dec
-006
Notes
N (See Notes)
rPM=0.186 (< 0.3, Physical double)
This double is physical.
 
 
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
180.6
Precise sep
49.63
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 TAR 5 AD 2006 7 181 49.6 5.80 10.40 O9V D 201806.99+404355.6

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