17557+1830 HDS2528

 
 
17h 55m 44.90s +18 30' 01.4" P.A. 253 sep 18.4 mag 9.36,12.30 Sp K5 dist. 25.04 pc (81.68 l.y.)
 
 
Coord 2000
17557+1830
Discov num
HDS2528
Comp
Coord arcsec 2000
17 55 44.90 +18 30 01.4
Date first
1900
Date last
2014
Obs
7
Pa first
254
Pa last
253
P.A. Now (θ)
253°
Sep first
19.2
Sep last
18.4
Sep. Now (ρ)
18.4"
Mag pri
9.36
Mag sec
12.30
delta mag (ΔM)
2.94
Spectral class
K5 (yellow-orange)
Pri motion ra
-047
Sec motion ra
-047
Pri motion dec
-047
Sec motion dec
-046
Notes
rPM=0.015 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
252.7
Precise sep
18.42
Constellation
Hercules
SAO
103221
HIP
87768
Tycho2
1557-01987-1
GL
Gl 698
BD
BD+18 3497
Distance
25.04
Distance ly
81.68
last precise pa
252.7
last precise sep
18.42
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17557+1830 HDS2528 2001 4 252 18.6 9.36 12.30 K5 D 175544.90+183001.4
17557+1830 HDS2528 2014 6 253 18.4 9.36 12.30 K5 175544.90+183001.4

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