archiv~1.txt: SETI Encounter 2001 Target Stars

SETI Encounter 2001 Target Stars

John Bush ( jebush@ridgecrest.ca.us )
Fri, 26 Mar 1999 09:41:52 -0800 (PST)

More details on the Dutil & Dumas Encounter 2001 message at:
http://www.newpower.org/xnews/oldmsg/183.shtml

Note that their 4 target stars are probably visible in small binoculars. The
mag 5 should be naked eye if you've got dark skies. I could be wrong but
think this region of sky is now rising in the northeast sometime after
midnight. Has anyone tried spotting the target stars? - Just for the heck
of it.
__jeb
________________________________________________________

>From the article:

In order to maximize the probability of detection,
the direction of the transmission has been carefully
chosen to include stars similar to our Sun, and to
limit the degradation of the signal as it travels
through the vast reaches of interstellar space.
Fortunately, there is a region between the spiral
arms of our galaxy where the signal can be
transmitted over long distances without too much
degradation. This region is situated between 50 and
90 degrees of galactic longitude, which corresponds
roughly to the region of the sky called the "Summer
Triangle". Four stars, clones of our Sun, have been
selected from the list made by the SETI institute.
These target stars are located at distances between
50 and 70 light-years from the Sun.

Target List:

Names l |b| a (J2000) d (J2000) Type D(Lyr) V

HD190360 67 1 20h03m37.41s +29d53m48.51s G7V 51.8 5.73

HD190406 57 8 20h04m06.23s +17d04m12.64s G1V 57.6 5.08

HD186408 83 13 19h41m48.95s +50d31m30.21s G3V 70.5 5.99

HD178428 50 4 19h07m57.32s +16d51m12.24s G6V 68.3 6.08

Table headings: l and |b| are the coordinates of the
target star in galactic latitude and (absolute)
longitude, while a and d give the Right Ascension and
Declination of the star in the J2000 coordinate
system. The star's spectral type is given next; for
comparison, our Sun is a G2V. The next column gives
the distances to each star in light years. The last
column gives the Visual magnitude (brightness) of
each star.