Home > Stars > Yellow > Beta Coma Berenices
Beta (β) Coma Berenices
Solar Type Star
| Right Ascension | 00h 00m 00s | Best Seen | --- |
| Declination | 00° 00' 00" | Magnitude | -.-- |
| Constellation | Coma Berenices | ||
| Actual | Compared to Sun | |
| Distance | ~-- ly | -- |
| Actual Brightness | -- | -- |
| Surface Temperature | -- °K | -- |
| Diameter | -- | -- |
| Mass | -- | -- |
| Surface Gravity | -- | -- |
| Surface Composition (by mass) | 74% hydrogen 24% helium 2% everything else |
same |
| Spectral Type | --- | G2 V |
| Density (gram/cubic cm) | -- | -- |
What To Look For Through The Telescope
TODO...
BETA (β) COMAE BERENICIS
SOLAR TYPE STAR
Right Ascension:
13h 11m 53s
Best Seen:
4/1 - 8/15
Declination:
27º 52' 35"
Magnitude:
4.26
Computer File:
betacom
Constellation:
Coma Berenices
Actual
Compared to Sun
Distance
~ 30 l.y.
--
Actual Brightness
--
--
Surface Temperature
~ 6000 K
~ 1.03
Diameter
--
~ 1.10
Mass
--
~ 1.10
Surface Gravity
--
--
Surface Composition (by mass)
74% hydrogen 24% helium 2% everything else
same
Spectral Type
G0 V
G2 V
Density (gram/cubic cm)
--
--
WHAT TO LOOK FOR THROUGH THE TELESCOPE:
-
Recommended eyepiece: 24mm or 40 mm.
-
When people look through the telescope they should see a faint star. It may appear to be a pale yellow.
BETA COMAE BERENICIS INFORMATION:
-
This is the second brightest star in the constellation Coma Berenices, Berenice’s Hair.
-
The Greek Konon of Samos (born 247 B.C.) named this constellation after Egyptian Queen Berenice.
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The story: beautiful Berenice cut her long, beautiful hair as a sacrifice to the Greek goddess Aphrodite, hoping for her husband’s safe return from war. King Ptolemy III of Egypt did indeed return safely. Zeus and Aphrodite were so touched by Berenice’s sacrifice that they placed her hair in the heavens.
-
Berenice died in 221 B.C. Apparently, she was determined, scheming, and politically ambitious.
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The north pole of our Milky Way galaxy is located in Coma Berenices.
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The weak Coma Berenicid meteor shower occurs from early December to late January (about December 8 to January 23).
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This star is like our sun in several ways. It is about the same size, about the same temperature, and it is also fusing hydrogen in its core. It also has similar magnetic activity, meaning beta Coma Berenices probably has sunspots, flares, prominences, etc.
-
This star is not like our sun in several ways. So far, no planets have been found orbiting the star. (There’s not even a dust disk around the star, the leftovers of planetary formation.) It has a bit more iron than our sun. Also, its rotation period is half that of our sun’s, so beta Coma Berenices’ solar cycle is about 16.6 years, as compared to our sun’s 11 year cycle.
Item
Updated
Notes
Coordinates
11-26-2003
SIMBAD says 13 11 52 +27 52 41
Hipparcos says 13 11 53 +27 52 33
Magnitude
11-26-2003
SIMBAD Vmag = 4.26
Distance
11-26-2003
SIMBAD, Hipparcos parallax 109.23mas -> 29.86ly
Actual Brightness
Surface Temperature
11-26-2003
http://www.astro.uiuc.edu/projects/sow/betacom.html
Diameter
11-26-2003
http://www.astro.uiuc.edu/projects/sow/betacom.html
Mass
11-26-2003
http://www.astro.uiuc.edu/projects/sow/betacom.html
Surface Gravity
Surface Composition
11-26-2003
OK for all stars
Spectral Type
11-26-2003
SIMBAD says F9.5 V
Hipparcos says G0 V
Density
Other Information
11-26-2003
legend/reality from http://www.hawastsoc.org/deepsky/com/ and http://www.seds.org/Maps/Stars_en/Fig/comaberenices.html
meteor shower from http://comets.amsmeteors.org/meteors/showers/coma_berenicids.html
more at http://www.astro.uiuc.edu/projects/sow/betacom.html