BL Lacertae
(OY 401,  S4 2200+42,  B3 2200+420)

Coordinates (J2000)
R.A.: 22 02 43.3    Dec.: +42 16 40

z = 0.0686
E(B-V) = 0.329

w2200+420.gif (29224 byte)

Field of view is 10'x 10'

Comparison stars

star B V Rc Ic   B-V V-R V-I
B 14.68 (0.10) 12.90 (0.10) 11.99 (0.04) 11.12 (0.04)   1.78 0.91 1.78
C 15.20 (0.10) 14.26 (0.10) 13.76 (0.05) 13.32 (0.05)   0.94 0.50 0.94
H 15.81 (0.10) 14.42 (0.10) 13.73 (0.06) 13.07 (0.06)   1.39 0.69 1.35
K 16.36 (0.10) 15.48 (0.10) 15.00 (0.06) 14.54 (0.07)   0.81 0.67 1.33

Comparison stars from:
Bertaud et al. 1969, A&A 3, 436-442 (B and V filters)
and Fiorucci & Tosti 1996, A&AS 116, 403-407 (Rc and Ic filters)

Historical light curve

Photometrical data

BACK to BLAZAR LIST