20181+1555 J   553

 
 
20h 18m 06.69s +15 54' 09.5" P.A. 20 sep 3.7 mag 10.70,11.90 Sp B2+A2
 
 
Coord 2000
20181+1555
Discov num
J   553
Comp
Coord arcsec 2000
20 18 06.69 +15 54 09.5
Date first
1910
Date last
2016
Obs
16
Pa first
20
Pa last
20
P.A. Now (θ)
20°
Sep first
4.2
Sep last
3.7
Sep. Now (ρ)
3.7"
Mag pri
10.70
Mag sec
11.90
delta mag (ΔM)
1.2
Spectral class
B2+A2 (blue-white/white)
Pri motion ra
+005
Sec motion ra
Pri motion dec
-003
Sec motion dec
Notes
N (See Notes)
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
19.6
Precise sep
3.695
Constellation
Delphinus
Tycho2
1631-00441-1
Gaia DR2
98527206656
HD
355372
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20181+1555 J 553 2001 11 21 3.6 9.40 10.50 N D 201806.69+155409.5
20181+1555 J 553 2008 12 21 3.6 9.40 10.50 N D 201806.69+155409.5
20181+1555 J 553 2016 16 20 3.7 10.60 11.90 B2+A2 N 201806.69+155409.5

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