18055+0311 HEI 257

 
 
18h 05m 27.30s +03 11' 27.1" P.A. 331 sep 1.7 mag 10.30,11.50
 
 
Coord 2000
18055+0311
Discov num
HEI 257
Comp
Coord arcsec 2000
18 05 27.30 +03 11 27.1
Date first
1984
Date last
2015
Obs
5
Pa first
333
Pa last
331
P.A. Now (θ)
331°
Sep first
1.9
Sep last
1.7
Sep. Now (ρ)
1.7"
Mag pri
10.30
Mag sec
11.50
delta mag (ΔM)
1.2
Spectral class
Pri motion ra
+020
Sec motion ra
Pri motion dec
-027
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
330.9
Precise sep
1.7
Constellation
Ophiuchus
Tycho2
0434-00465-1
last precise pa
330.9
last precise sep
1.7
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18055+0311 HEI 257 2005 4 331 1.8 10.30 11.50 180527.30+031127.1
18055+0311 HEI 257 2015 5 331 1.7 10.30 11.50 180527.30+031127.1

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