20057+3020 ES  498

 
 
20h 05m 42.33s +30 19' 39.3" P.A. 309 sep 8.3 mag 8.86,12.50 Sp F5V dist. 82.99 pc (270.71 l.y.)
 
 
Coord 2000
20057+3020
Discov num
ES  498
Comp
Coord arcsec 2000
20 05 42.33 +30 19 39.3
Date first
1902
Date last
2015
Obs
9
Pa first
243
Pa last
309
P.A. Now (θ)
309°
Sep first
10.5
Sep last
8.3
Sep. Now (ρ)
8.3"
Mag pri
8.86
Mag sec
12.50
delta mag (ΔM)
3.64
Spectral class
F5V (yellow-white)
Pri motion ra
-019
Sec motion ra
Pri motion dec
-103
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
309.4
Precise sep
8.293
Constellation
Cygnus
SAO
69387
HIP
98981
Tycho2
2670-04657-1
Gaia DR2
84538970496
HD
190814
BD
BD+29 3889
Distance
82.99
Distance ly
270.71
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20057+3020 ES 498 1907 2 241 9.4 8.30 11.20 F5V D 200542.33+301940.3
20057+3020 ES 498 2011 3 306 7.9 8.86 12.50 F5V D 200542.33+301939.3
20057+3020 ES 498 2015 5 309 8.3 8.86 12.50 F5V 200542.33+301939.3

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