15311+2747 J  3321

 
 
15h 31m 08.33s +27 46' 20.6" P.A. 228.00 sep 4.4 mag 12.20,13.60
 
 
Coord 2000
15311+2747
Discov num
J  3321
Comp
Coord arcsec 2000
15 31 08.33 +27 46 20.6
Date first
1957
Date last
2015
Obs
10
Pa first
228
Pa last
228
P.A. Now (θ)
228°
Sep first
3.9
Sep last
4.4
Sep. Now (ρ)
4.4"
Mag pri
12.20
Mag sec
13.60
delta mag (ΔM)
1.4
Spectral class
Pri motion ra
+010
Sec motion ra
-022
Pri motion dec
+027
Sec motion dec
-004
Notes
rPM=1.547
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
228
Precise sep
4.357
Constellation
Corona Borealis
Tycho2
2032-00741-1
Gaia DR2
1270854129667536640
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
15311+2747 J 3321 2000 4 223 4.4 10.10 11.50 D 153108.33+274620.6
15311+2747 J 3321 2011 5 228 4.4 10.10 11.50 D 153108.33+274620.6
15311+2747 J 3321 2014 8 228 4.2 12.20 13.60 153108.33+274620.6
15311+2747 J 3321 2015 9 228 4.4 12.20 13.60 153108.33+274620.6

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