Viewing page 158 of 241

This transcription has been completed. Contact us with corrections.

145
[[strikethrough]]September 30, 1907[[/strikethrough]]
October 1, 1907.

"These should have been recorded on page 173"
Exam of plates to record variability of No. 623 on A8343 Type IV Na var? W.P.F. Sept. 18, 1907.
R.A. 10^[[h]] 47.6[[strikethrough]]7[[/strikethrough]] -52° 45.6'[[strikethrough]]5[[/strikethrough]](1875)
computed pos 1875 10 47 35.2 - 52 45.6 

[[4 column table]]
|Plate|Date|Ex.|Est.|
|B21183|Apr. 12, 1898|10^[[m]]|12.0|
|B31597|May 4, 1903|10|10.7|
|B33455|Apr. 23, 1904|10|10.9|
|B27312|May 14, 1901|74|10.7|
|B31796|May 18, 1903|60|10.8|
|B31632|May 5, 1903|10|10.8|
|B3[[strikethrough]]1[[/strikethrough]]5727|March 31, 1905|10|10.6|
|B25583|June 20, 1900|10|10.4|
|B33407|Apr. 20, 1904|10|10.0|
|B36032|May 13, 1905|10|10.3|
|B27225|Apr. 22, 1901|60|10.7|
[[/4 column table]]

An examination of the above plates shows a marked variation in this star. The plates taken between June 20, 1900, and May 13, 1905 show a variation amounting to 0.9 magn, Est. magn. limits 10.0 to 10.9, while a plate taken on April 12, 1898, gives the estimated magn. 12.0. 
Confirmed by L. D. Wells.
W.P.F. Oct. 1, 1907.

John G. Wolbach Library, Harvard-Smithsonian Center for Astrophysics . Provided by the NASA Astrophysics Data System