where can I get informations about Polaris?

Hi, I have been trying to get informations about Polaris, such as how
far it is, what the surface temperature is, what material it is made
from, and the close up pictures of how Polaris looks like. I tried to
find it on the net, but could not find any websites for it.
Thank you very much, and have a good day.

On Sun, 28 Sep 2003 00:18:36 GMT, Carl wrote:

Hi, I have been trying to get informations about Polaris, such as how
far it is, what the surface temperature is, what material it is made
from, and the close up pictures of how Polaris looks like.


IIRC, there are *no* "close up pictures* of Polaris.

It's distance is over 300 light years away , according to Burnham's

It's a star, and made up of hydrogen, helium, etc.



I tried to
find it on the net, but could not find any websites for it.
Thank you very much, and have a good day.

http://www.pha.jhu.edu/~weaver/polaris.html


http://www.sciencenet.org.uk/databas...s/p01113b.html


http://stardate.org/resources/faqs/

http://www.smv.org/jims/l6a.htm

will explain the HR diagram. I couldn't find any on line resources
that tell you how hot Polaris is, but Burnhams puts the primary star`
(there's a second star) as a cepheid variable, as spectral type F8,
absolute magnitude -3.2 (1600 times brighter than the sun), so from
the HR diagram, at
http://ast.star.rl.ac.uk/hr.html it's around 7,000 Degrees, but I
may be wrong.

--

Find out about Australia's most dangerous Doomsday Cult:
http://users.bigpond.net.au/wanglese/pebble.htm

"You can't fool me, it's turtles all the way down."

On Sun, 28 Sep 2003 00:18:36 GMT, Carl wrote:

Hi, I have been trying to get informations about Polaris, such as how
far it is, what the surface temperature is, what material it is made
from, and the close up pictures of how Polaris looks like.


IIRC, there are *no* "close up pictures* of Polaris.

It's distance is over 300 light years away , according to Burnham's

It's a star, and made up of hydrogen, helium, etc.



I tried to
find it on the net, but could not find any websites for it.
Thank you very much, and have a good day.

http://www.pha.jhu.edu/~weaver/polaris.html


http://www.sciencenet.org.uk/databas...s/p01113b.html


http://stardate.org/resources/faqs/

http://www.smv.org/jims/l6a.htm

will explain the HR diagram. I couldn't find any on line resources
that tell you how hot Polaris is, but Burnhams puts the primary star`
(there's a second star) as a cepheid variable, as spectral type F8,
absolute magnitude -3.2 (1600 times brighter than the sun), so from
the HR diagram, at
http://ast.star.rl.ac.uk/hr.html it's around 7,000 Degrees, but I
may be wrong.

--

Find out about Australia's most dangerous Doomsday Cult:
http://users.bigpond.net.au/wanglese/pebble.htm

"You can't fool me, it's turtles all the way down."

Wally Anglesea™ wrote in
alt.astronomy:


IIRC, there are *no* "close up pictures* of Polaris.

It's distance is over 300 light years away , according to Burnham's


Hipparchos tells us 431,42 ly, which is even for Captain Kirk a hell of a
trip. But we should watch subspace messages for eye witness reports.


--
CeeBee


Uxbridge: "By God, sir, I've lost my leg!"
Wellington: "By God, sir, so you have!"


Google CeeBee @ www.geocities.com/ceebee_2

Wally Anglesea™ wrote in
alt.astronomy:


IIRC, there are *no* "close up pictures* of Polaris.

It's distance is over 300 light years away , according to Burnham's


Hipparchos tells us 431,42 ly, which is even for Captain Kirk a hell of a
trip. But we should watch subspace messages for eye witness reports.


--
CeeBee


Uxbridge: "By God, sir, I've lost my leg!"
Wellington: "By God, sir, so you have!"


Google CeeBee @ www.geocities.com/ceebee_2

CeeBee wrote:

Hipparchos tells us 431,42 ly, which is even for Captain Kirk a hell of a
trip. But we should watch subspace messages for eye witness reports.

Nitpick: That would be better put as 430 light-years +/- 30, the
range corresponding to the reported standard error in the parallax
data, given as 7.56 mas +/- .48.

(BTW, it's "Hipparcos" for the satellite, with only one H.)

--
Odysseus

CeeBee wrote:

Hipparchos tells us 431,42 ly, which is even for Captain Kirk a hell of a
trip. But we should watch subspace messages for eye witness reports.

Nitpick: That would be better put as 430 light-years +/- 30, the
range corresponding to the reported standard error in the parallax
data, given as 7.56 mas +/- .48.

(BTW, it's "Hipparcos" for the satellite, with only one H.)

--
Odysseus

Proper Names
Polaris
Pole Star
North Star
Cynosura
Bayer Designation
Alpha Ursae Minoris
Flamsteed Number
1 Ursae Minoris
BSC
424
HD
8890
Constellation
Ursa Minor
Right Ascension
2h 35m 54s
Declination
+89° 16' 49"
Distance
431 light years
132 parsecs
Magnitude
Apparent: +2.1
Absolute: -3.5
Spectral Class
F7 Bright Yellow Supergiant

Bob


"Carl" wrote in message
. ..
Hi, I have been trying to get informations about Polaris, such as how
far it is, what the surface temperature is, what material it is made
from, and the close up pictures of how Polaris looks like. I tried to
find it on the net, but could not find any websites for it.
Thank you very much, and have a good day.

Proper Names
Polaris
Pole Star
North Star
Cynosura
Bayer Designation
Alpha Ursae Minoris
Flamsteed Number
1 Ursae Minoris
BSC
424
HD
8890
Constellation
Ursa Minor
Right Ascension
2h 35m 54s
Declination
+89° 16' 49"
Distance
431 light years
132 parsecs
Magnitude
Apparent: +2.1
Absolute: -3.5
Spectral Class
F7 Bright Yellow Supergiant

Bob


"Carl" wrote in message
. ..
Hi, I have been trying to get informations about Polaris, such as how
far it is, what the surface temperature is, what material it is made
from, and the close up pictures of how Polaris looks like. I tried to
find it on the net, but could not find any websites for it.
Thank you very much, and have a good day.

On Sun, 28 Sep 2003 06:32:15 +0100, Bob Weber wrote:

"Carl" wrote in message
. ..
Hi, I have been trying to get informations about Polaris, such as how
far it is, what the surface temperature is, what material it is made
from, and the close up pictures of how Polaris looks like. I tried to
find it on the net, but could not find any websites for it.

Proper Names
Polaris

Spectral Class
F7 Bright Yellow Supergiant


Polaris is also a Cepheid variable with a pulse period of 3.95 days. The
pulse magnitude has dropped from 0.12 mag to 0.03 mag over a 50 year
period. It is suggested that it may stop pulsating and change from a
Cepheid to an ordinary non-variable star.

Sky & Telescope (April) 1995; 89 (4): 10

--

Gautam Majumdar

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