18562+0412 STF2417AB (Alya)

 
 
18h 56m 13.18s +04 12' 12.9" P.A. 104 sep 22.6 mag 4.59,4.93 Sp A5V+A5Vn dist. 47.42 pc (154.68 l.y.)
 
 
Coord 2000
18562+0412
Discov num
STF2417
Comp
AB
Coord arcsec 2000
18 56 13.18 +04 12 12.9
Date first
1755
Date last
2016
Obs
225
Pa first
106
Pa last
104
P.A. Now (θ)
104°
Sep first
22.1
Sep last
22.6
Sep. Now (ρ)
22.6"
Mag pri
4.59
Mag sec
4.93
delta mag (ΔM)
0.34
Spectral class
A5V+A5Vn (white/white)
Pri motion ra
+038
Sec motion ra
+052
Pri motion dec
+027
Sec motion dec
+031
Notes
N V (See Notes, Proper motion indicates physical)
rPM=0.241 (< 0.3, Physical double)
This double is physical.
 
 
18562+0412 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Alya 124068 18562+0412 STF2417 AB 1755 2016 225 104 22.6 4.59 4.93 0.34 <===
Show 124068 18562+0412 STF2417 AC 1908 2007 18 58 421.0 4.59 6.78 2.19
Show 124070 18562+0412 STF2417 BC 1908 2007 17 56 405.6 4.93 6.78 1.85
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
103.9
Precise sep
22.641
Common name
Alya
Other names
Alga
Constellation
Serpens
SAO
124068
HIP
92946
Tycho2
0457-00687-1
HD
175638
HR
7141
GC
25991
BD
BD+04 3916
Bayer
Theta 1 Serpentis
Bayer name
The1 Ser
Flamsteed
63 Serpentis
Flamsteed name
63 Ser
Distance
47.42
Distance ly
154.68
last precise pa
103.9
last precise sep
22.641
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18562+0412 STF2417 AB 2007 197 104 22.4 4.59 4.93 A5V A5Vn N D 185613.18+041212.9
18562+0412 STF2417 AB 2008 205 104 22.3 4.59 4.93 A5V A5Vn N DV 185613.18+041212.9
18562+0412 STF2417 AB 2009 210 103 23.0 4.59 4.93 A5V A5Vn NVD 185613.18+041212.9
18562+0412 STF2417 AB 2010 214 104 22.4 4.59 4.93 A5V A5Vn NVD 185613.18+041212.9
18562+0412 STF2417 AB 2011 215 99 24.7 4.59 4.93 A5V A5Vn NVD 185613.18+041212.9
18562+0412 STF2417 AB 2012 217 104 22.3 4.59 4.93 A5V A5Vn NVD 185613.18+041212.9
18562+0412 STF2417 AB 2014 220 103 22.4 4.59 4.93 A5V A5Vn NVD 185613.18+041212.9
18562+0412 STF2417 AB 2015 221 105 22.5 4.59 4.93 A5V+A5Vn NV 185613.18+041212.9
18562+0412 STF2417 AB 2016 225 104 22.6 4.59 4.93 A5V+A5Vn NV 185613.18+041212.9

If you need more information about this double, apply for a data request form to the WDS.