21521+2748 HO  171

 
 
21h 52m 08.95s +27 48' 02.2" P.A. 342 sep 0.8 mag 9.36,9.50 Sp A3
 
 
Coord 2000
21521+2748
Discov num
HO  171
Comp
Coord arcsec 2000
21 52 08.95 +27 48 02.2
Date first
1884
Date last
2016
Obs
58
Pa first
359
Pa last
342
P.A. Now (θ)
342°
Sep first
0.6
Sep last
0.8
Sep. Now (ρ)
0.8"
Mag pri
9.36
Mag sec
9.50
delta mag (ΔM)
0.14
Spectral class
A3 (white)
Pri motion ra
+013
Sec motion ra
+013
Pri motion dec
+004
Sec motion dec
+004
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
341.5
Precise sep
0.758
Cdsa2 id
HO 171
Constellation
Pegasus
Tycho2
2210-00105-1
HD
207931
Ra deg
21.869152777777778
De deg
27.800611111111113
last precise pa
341.5
last precise sep
0.758
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21521+2748 HO 171 2000 51 341 0.7 9.36 9.50 A3 D 215208.95+274802.2
21521+2748 HO 171 2009 53 342 0.7 9.36 9.50 A3 D 215208.95+274802.2
21521+2748 HO 171 2010 56 342 0.7 9.36 9.50 A3 D 215208.95+274802.2
21521+2748 HO 171 2015 57 342 0.7 9.36 9.50 A3 215208.95+274802.2
21521+2748 HO 171 2016 58 342 0.8 9.36 9.50 A3 215208.95+274802.2

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