2200+420 (BL Lac)

Coordinates
R.A. = 22:02:43.290, Dec. = +42:16:39.98 (2000)
z = 0.0686


Landessternwarte Heidelberg-Königstuhl

GASP suggested stars: B C H

Comparison stars

Star

U

B

V

R

I

B

16.47 (~ 0.07)

14.68 (~ 0.04)

12.90 (0.04)

11.99 (0.04)

11.12 (0.05)

C

15.66 (~ 0.06)

15.20 (~ 0.05)

14.26 (0.06)

13.79 (0.05)

13.32 (0.05)

H

16.91 (~ 0.09)

15.81 (~ 0.06)

14.40 (0.06)

13.73 (0.06)

13.07 (0.06)

K

16.61 (~ 0.08)

16.36 (~ 0.07)

15.47 (0.07)

15.00 (0.07)

14.54 (0.07)

UB  from Bertaud et al. (1969, A&A 3, 436)
VRI  from Fiorucci
& Tosti (1996, A&AS 116, 403)

Field of view is 10'x10'