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Doubles in session


Current system
20161+1552
BKO 557


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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20161+1552 BKO 557

 
 
20h 16m 05.29s +15° 52' 18.2" P.A. 347.00 sep 5.6 mag 12.70,14.00
 
 
Coord 2000
20161+1552
 Discov num
BKO 557
 Comp
Coord arcsec 2000
20 16 05.29 +15 52 18.2
Date first
1998
 Date last
2015
 Obs
7
Pa first
349
 Pa last
347
 P.A. Now (θ)
347°
Sep first
5.5
 Sep last
5.6
 Sep. Now (ρ)
5.6"
Mag pri
12.70
 Mag sec
14.00
 delta mag (ΔM)
1.3
 Spectral class
Pri motion ra
-001
 Sec motion ra
Pri motion dec
-011
 Sec motion dec
Notes
N (See Notes)
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
347
 Precise sep
5.576
 Constellation
Delphinus
 Gaia DR2
1808438036309997312
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20161+1552 BKO 557 2008 1 349 5.4 12.70 14.00 N 201605.29+155218.2
20161+1552 BKO 557 2010 4 3 6.1 12.70 14.00 N 201605.29+155218.2
20161+1552 BKO 557 2015 4 349 5.4 12.70 14.00 N 201605.29+155218.2

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