18187-1206 SNA  90Aa,Ab

 
 
18h 18m 40.86s -12 06' 23.3" P.A. 303 mag 7.40,7.60 Sp O5IV((f)) dist. 769.23 pc (2509.23 l.y.)
 
 
Coord 2000
18187-1206
Discov num
SNA  90
Comp
Aa,Ab
Coord arcsec 2000
18 18 40.86 -12 06 23.3
Date first
2012
Date last
2012
Obs
1
Pa first
303
Pa last
303
P.A. Now (θ)
303°
Sep first
0.0
Sep last
0.0
Sep. Now (ρ)
0"
Mag pri
7.40
Mag sec
7.60
delta mag (ΔM)
0.2
Spectral class
O5IV((f)) (blue)
Pri motion ra
+001
Sec motion ra
Pri motion dec
-002
Sec motion dec
Notes
N V K (See Notes, Proper motion indicates physical, K-band or other infrared magnitudes)
This double is physical.
 
 
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
303.2
Precise sep
0.003
Cdsa2 id
SNA 90 Aa,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
303.2
last precise sep
0.003
 
 
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 Aa,Ab 2012 1 303 0.0 7.40 7.60 O5III V K 181840.86-120623.3

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