…continuedA Treasure-Trove of Variable Stars
What Comes Next
You can share your results with professional astronomers and learn from more experienced observers by joining an organization like the American Association of Variable Star Observers, 25 Birch St., Cambridge, MA 02138 USA. The benefits of membership include being in the pipeline to receive the AAVSO's Alert Notices and News Flashes of novae and other stars showing unusual activity, as well as the biannual Journal. To find out how to join, call 617-354-0484 or visit its Web site. This site has links to other variable-star groups around the world.
Eclipsing binaries have played a crucial role in astronomers' understanding of the universe. For example, the revolution period revealed by eclipses can be compared to the radial velocities of the components determined by spectroscopy. This information often makes it possible to deduce the diameters, masses, and densities of the individual stars, even without necessarily knowing how far away they are.
Comparison charts for the two variables listed in the table but not included in this Web article are contained within the original article, available in Sky & Telescope's online archive.
|Suspected Eclipsing Binaries for November and December Nights.|
|DG Cet||1h 50.6m||-04° 57'||9.0*||0.9||F5|
|DS Cet||2h 16.2m||-21° 00'||8.9*||0.6||G3V|
|AL Ari||2h 42.6m||+12° 44'||9.2||0.6||F8|
|FU Eri||3h 09.9m||-45° 00'||9.3||0.5||A0V|
|V1125 Tau||3h 39.0m||+00° 48'||8.7||0.6||G0|
|DP Cam||4h 50.4m||+63° 20'||10||0.9||K7|
|V1366 Ori||5h 16.0m||-09° 49'||9.9||0.8||A0|
|UZ Vol||6h 36.1m||-72° 47'||9.3||0.8||G8III|
|V365 Pup||7h 19.1m||-35° 11'||7.8||0.6||A0V|
|V366 Pup||7h 20.9m||-48° 31'||8.1*||0.5||B9V|
|CD Lyn||7h 43.1m||+48° 41'||9.8||0.7||F2|
|All these stars are tentatively described in the Hipparcos catalog as eclipsing binaries, but no one has yet determined their periods. The magnitude given is the median of the values measured during the mission, adjusted to the V (visual) photometric band. An asterisked value is the combined magnitude of a close pair resolved by Hipparcos. The amplitude is the difference between the faintest and brightest magnitudes measured (the actual amplitude could be even greater). The table also gives the star's spectral type.|