18187-1206 SNA  90AB

 
 
18h 18m 40.86s -12 06' 23.3" P.A. 34 sep 3 mag 6.63,13.70 Sp O5IV((f)) dist. 769.23 pc (2509.23 l.y.)
 
 
Coord 2000
18187-1206
Discov num
SNA  90
Comp
AB
Coord arcsec 2000
18 18 40.86 -12 06 23.3
Date first
2012
Date last
2012
Obs
1
Pa first
34
Pa last
34
P.A. Now (θ)
34°
Sep first
3.0
Sep last
3.0
Sep. Now (ρ)
3"
Mag pri
6.63
Mag sec
13.70
delta mag (ΔM)
7.07
Spectral class
O5IV((f)) (blue)
Pri motion ra
+001
Sec motion ra
Pri motion dec
-002
Sec motion dec
Notes
N K (See Notes, K-band or other infrared magnitudes)
Nature of this double is uncertain.
 
 
18187-1206 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 161311 18187-1206 SNA 90 Aa,Ab 2012 2012 1 303 0.0 7.40 7.60 0.20
Show 161311 18187-1206 SNA 90 AB 2012 2012 1 34 3.0 6.63 13.70 7.07 <===
Show 161311 18187-1206 SNA 90 AC 2012 2012 1 267 7.6 6.63 14.00 7.37
Quadruple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
33.8
Precise sep
3
Cdsa2 id
SNA 90 AB
Constellation
Serpens
SAO
161311
HIP
89729
Tycho2
5685-03744-1
HD
168112
BD
BD-12 4988
Ra deg
18.31135
De deg
-12.106472222222221
Distance
769.23
Distance ly
2509.23
last precise pa
33.8
last precise sep
3
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18187-1206 SNA 90 AB 2012 1 34 3.0 6.63 13.70 O5III K 181840.86-120623.3

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