18177+2356 HJ 2831

 
 
18h 17m 39.97s +23 55' 03.8" P.A. 339 sep 17.4 mag 10.84,11.80 Sp G5
 
 
Coord 2000
18177+2356
Discov num
HJ 2831
Comp
Coord arcsec 2000
18 17 39.97 +23 55 03.8
Date first
1830
Date last
2015
Obs
13
Pa first
353
Pa last
339
P.A. Now (θ)
339°
Sep first
10.0
Sep last
17.4
Sep. Now (ρ)
17.4"
Mag pri
10.84
Mag sec
11.80
delta mag (ΔM)
0.96
Spectral class
G5 (yellow)
Pri motion ra
+017
Sec motion ra
-038
Pri motion dec
-018
Sec motion dec
+121
Notes
rPM=1.179
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
339
Precise sep
17.416
Constellation
Hercules
Tycho2
2093-00394-1
Gaia DR2
38741648128
HD
341889
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18177+2356 HJ 2831 1999 5 340 17.0 10.84 11.80 G5 D 181739.97+235503.8
18177+2356 HJ 2831 2001 6 340 17.0 10.84 11.80 G5 D 181739.97+235503.8
18177+2356 HJ 2831 2013 7 339 17.6 10.84 11.80 G5 181739.97+235503.8
18177+2356 HJ 2831 2015 9 339 17.4 10.84 11.80 G5 181739.97+235503.8

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