Expanding Motions in the Lacerta Aggregate.
Abstract
The aggregate of (#B5 stars in Lacerta, centered at 1 = 67 , b = -14 and containing, among , the stars 6, 8, 10, 12, 14, and 16 Lacertae, is found to show an expansion similar to that of the Persei aggregate. Figure 3 shows the proper motions. The coefficient of expansion is O'.'()OO86 per year per degree and hence the age of the aggregate probably is 4.2 X 106 years. Its distance is about 460 parsecs, and the projected dimensions are 120 x 70 parsecs. Table 1 lists the stars in the aggregate. Table 2 summarizes its principal properties.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- March 1953
- DOI:
- 10.1086/145688
- Bibcode:
- 1953ApJ...117..256B