Data
on the region of sky in which the Hyades star cluster appears.
Attributes:
V apparent visual magnitude (in the "V"
band. Remember, smaller is brighter)
RA right ascension in degrees (celestial longitude)
DEC declination in degrees (latitude)
parallax is in milliarcseconds
PM_RA is proper motion in the RA direction, milliarcseconds
per year
PM_DEC is proper motion in the DEC direction,
milliarcseconds per year
B_V is color index B–V in magnitudes (larger
is redder, smaller is bluer)
V_I is color index V–I in magnitudes (larger
is redder, smaller is bluer)
cluster is "Hyades"
Which stars are actually members of the cluster (as opposed to
stars that happen to be in the same line of sight)? How can you
use data to tell?
Using the stars in the cluster, make a color-magnitude diagram.
Find the main sequence.
Aldebaran is a very bright red star, the brightest in the constellation
Taurus. It's in this collection. Find it. Is it a member of the
Hyades cluster? Make a convincing argument why or why not.
Source:
Data from the Hipparcos satellite web site
http://astro.estec.esa.nl/Hipparcos/hipparcos.html
actually includes photometric data from Tycho as well
(downloaded by Tim Erickson, July 2003) |