Researches in Stellar Photometry During the Years 1894 to 1906

John Adelbert Parkhurst

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10 0. 05 0. 15 11. 13 "38 0. 08 40-INCH.
^ August 30.
September 13. November 3 January 3.
Mean.
w Mag.
J Mag.
Mag.
^ Mag. Mag.
J Mag. > Mag.
JMag . Mag. H . Mag. P.
A Mag.
I .
10. 25 10. 48 "43 11. 99 0. 07 10. 39 0. 15 10. 66 -0. 07 11. 54 4-o. I6 11. 78 + 0. 07 + 0. 03 + 0. 04 -0. 05 10. 32 ^ 10. 63 3 i i . 50 ^ "-83 10. 57 10. 88 "75 12. 08 0. 07 0. 07 0. 04 0. 08 m 10. 70 o 11. 51 x "-77 Mean.
+ 0. 07 + O. OI 0. 06 10. 67 "53 11. 79 + O. O + 0. 0 o. O 11. 07 11. 32 0. 06 y 12. 40 a 14. 19 t... + 0. 09 + 0. 29 12. 60 13. 89 + 0. 29 11. 95 o. Oi 13. 54 .... 1 2 86 -0. 36 -0. 36 12. 28 13. 97 -0. 0 + 0. 0 3 12. 31 i 13-90 (12. 86 (14. 94 (14. 34 12. 56 H-I5 13 " 15-19 14-59 0. 19 0. 18 r Also 3, 1905 November 18, 15. 48 and 15. 73.
CHAPTER IX.
CYGNI.
125 TABLE 76. 7220 S CYGNI. VISUAL OBSERVATIONS OP THE VARIABLE.
No.
Date.
h Aperture.
Comparisons.
Reduction, Steps.
Means.
Seeing.
I.
J Mag.
Month and Day.
Hour C. S. T.
Julian Day G. M. T.
Steps.
Mag.
i 2 3 4 5 6 7 8 9 IO 1 1 12 13 '4 15 16 18 '9 20 21 22 23 24 25 26 27 28 29 30 3' 32 33 34 35 36 37 38 39 40 4 42 43 1892 Dec.

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