3C273 - Quasar in Virgo

Dear Friends,

The quasar 3C273 in Virgo is the brightest visible quasar from Earth and
with a magnitude of 12.8 is also visible with average amateur equipment.
Lying at a distance of two BILLION light-years away, it is the furthest
any amateur equipment can reach (and especially right from one's backyard).

Further details including an image are available at
http://www.perseus.gr/Astro-DSO-QSO-3C273.htm .

Anthony.

Hi

A lovely image...
...but for example http://www.guildfordas.org/observing...r_episode.html
~7 billion light years (I am not a member of the Guildford AS).

There are apparently quite a few others as well as AGNs that are observed,
imaged and monitored by amateurs.

Regards
Paul

"Anthony Ayiomamitis" wrote in message
...
Dear Friends,

The quasar 3C273 in Virgo is the brightest visible quasar from Earth and
with a magnitude of 12.8 is also visible with average amateur equipment.
Lying at a distance of two BILLION light-years away, it is the furthest
any amateur equipment can reach (and especially right from one's
backyard).

Further details including an image are available at
http://www.perseus.gr/Astro-DSO-QSO-3C273.htm .

Anthony.

"Paul Clark" wrote in message
news
Hi

A lovely image...
..but for example http://www.guildfordas.org/observing...r_episode.html
~7 billion light years (I am not a member of the Guildford AS).

There are apparently quite a few others as well as AGNs that are observed,
imaged and monitored by amateurs.

Regards
Paul

Here's another - Q1634+706 in Draco. Light travel distance: 9 billion light
years. Distance now: 13 billion light years. Observed in a 10" and should
be visible in an 8".

Clear skies, Alan

Alan French wrote:
"Paul Clark" wrote in message
news
Hi

A lovely image...
..but for example http://www.guildfordas.org/observing...r_episode.html
~7 billion light years (I am not a member of the Guildford AS).

There are apparently quite a few others as well as AGNs that are observed,
imaged and monitored by amateurs.

Regards
Paul

Here's another - Q1634+706 in Draco. Light travel distance: 9 billion light
years. Distance now: 13 billion light years. Observed in a 10" and should
be visible in an 8".

There is also PHL 1811, discovered in 2001. It is the second brightest
quasar (visible in a 6"):

http://www.skyhound.com/sh/archive/mar/PHL_1811.html

Clear skies,
Greg

--
Greg Crinklaw
Astronomical Software Developer
Cloudcroft, New Mexico, USA (33N, 106W, 2700m)

SkyTools: http://www.skyhound.com/cs.html
Observing: http://www.skyhound.com/sh/skyhound.html
Comets: http://www.skyhound.com/sh/comets.html

To reply take out your eye

Dear Friends,

A huge thanks for the various recommendations surrounding other
interesting quasars and which I will mark down for immediate imaging.

Nevertheless, I am delighted to see the thread that has been generated
and the really cool tips (targets) that have ensued. I am quite eager to
pursue PC 1247+3406 in Canes Venatici which I think (?) is the further
quasar found so far (over 12 billion light-yrs away and at magnitude 20.4).

Can someone enlighten me how to convert the redshift to percent of the
speed of light? Also, Ioanni, I do have the regular image (white on black).

Anthony.

Paul Clark wrote:
Hi,

A lovely image...
..but for example http://www.guildfordas.org/observing...r_episode.html
~7 billion light years (I am not a member of the Guildford AS).

There are apparently quite a few others as well as AGNs that are observed,
imaged and monitored by amateurs.

Regards
Paul

"Anthony Ayiomamitis" wrote in message
...

Dear Friends,

The quasar 3C273 in Virgo is the brightest visible quasar from Earth and
with a magnitude of 12.8 is also visible with average amateur equipment.
Lying at a distance of two BILLION light-years away, it is the furthest
any amateur equipment can reach (and especially right from one's
backyard).

Further details including an image are available at
http://www.perseus.gr/Astro-DSO-QSO-3C273.htm .

Anthony.

Hi

Try Maurice Gavin's page for starters. Loads of good material and some
images.

http://www.astroman.fsnet.co.uk/quasars.htm

(I was looking for this to add to my first post but couldn't find it)

Good luck
Regards
Paul
"Anthony Ayiomamitis" wrote in message
...
Dear Friends,

A huge thanks for the various recommendations surrounding other
interesting quasars and which I will mark down for immediate imaging.

Nevertheless, I am delighted to see the thread that has been generated and
the really cool tips (targets) that have ensued. I am quite eager to
pursue PC 1247+3406 in Canes Venatici which I think (?) is the further
quasar found so far (over 12 billion light-yrs away and at magnitude
20.4).

Can someone enlighten me how to convert the redshift to percent of the
speed of light? Also, Ioanni, I do have the regular image (white on
black).

Anthony.

Paul Clark wrote:
Hi,

A lovely image...
..but for example
http://www.guildfordas.org/observing...r_episode.html
~7 billion light years (I am not a member of the Guildford AS).

There are apparently quite a few others as well as AGNs that are
observed, imaged and monitored by amateurs.

Regards
Paul

"Anthony Ayiomamitis" wrote in message
...

Dear Friends,

The quasar 3C273 in Virgo is the brightest visible quasar from Earth and
with a magnitude of 12.8 is also visible with average amateur equipment.
Lying at a distance of two BILLION light-years away, it is the furthest
any amateur equipment can reach (and especially right from one's
backyard).

Further details including an image are available at
http://www.perseus.gr/Astro-DSO-QSO-3C273.htm .

Anthony.

Paul Clark wrote:
Hi

Try Maurice Gavin's page for starters. Loads of good material and some
images.

http://www.astroman.fsnet.co.uk/quasars.htm

He gives the transformation near the bottom of the home page. Thank you!

Anthony.


(I was looking for this to add to my first post but couldn't find it)

Good luck
Regards
Paul
"Anthony Ayiomamitis" wrote in message
...

Dear Friends,

A huge thanks for the various recommendations surrounding other
interesting quasars and which I will mark down for immediate imaging.

Nevertheless, I am delighted to see the thread that has been generated and
the really cool tips (targets) that have ensued. I am quite eager to
pursue PC 1247+3406 in Canes Venatici which I think (?) is the further
quasar found so far (over 12 billion light-yrs away and at magnitude
20.4).

Can someone enlighten me how to convert the redshift to percent of the
speed of light? Also, Ioanni, I do have the regular image (white on
black).

Anthony.

Paul Clark wrote:

Hi,

A lovely image...
..but for example
http://www.guildfordas.org/observing...r_episode.html
~7 billion light years (I am not a member of the Guildford AS).

There are apparently quite a few others as well as AGNs that are
observed, imaged and monitored by amateurs.

Regards
Paul

"Anthony Ayiomamitis" wrote in message
...


Dear Friends,

The quasar 3C273 in Virgo is the brightest visible quasar from Earth and
with a magnitude of 12.8 is also visible with average amateur equipment.
Lying at a distance of two BILLION light-years away, it is the furthest
any amateur equipment can reach (and especially right from one's
backyard).

Further details including an image are available at
http://www.perseus.gr/Astro-DSO-QSO-3C273.htm .

Anthony.

On Mar 18, 2:34 pm, Anthony Ayiomamitis
wrote:
Dear Friends,

A huge thanks for the various recommendations surrounding other
interesting quasars and which I will mark down for immediate imaging.

Nevertheless, I am delighted to see the thread that has been generated
and the really cool tips (targets) that have ensued. I am quite eager to
pursue PC 1247+3406 in Canes Venatici which I think (?) is the further
quasar found so far (over 12 billion light-yrs away and at magnitude 20.4).

Can someone enlighten me how to convert the redshift to percent of the
speed of light? Also, Ioanni, I do have the regular image (white on black).

Anthony.

Anthony,

In SR the redshift formula is:

1 + z = SQRT[(c + v)/(c - v)]

Solving for v (recession velocity) yields:

v = [(1 + z)^2 -1/(1 + z)^2 +1]

An easier keypunch is:

v = (1 + z)^2 c - c/ (1 + z)^2 +1

Regards

Ben

Ben wrote:

On Mar 18, 2:34 pm, Anthony Ayiomamitis
wrote:

Dear Friends,

A huge thanks for the various recommendations surrounding other
interesting quasars and which I will mark down for immediate imaging.

Nevertheless, I am delighted to see the thread that has been generated
and the really cool tips (targets) that have ensued. I am quite eager to
pursue PC 1247+3406 in Canes Venatici which I think (?) is the further
quasar found so far (over 12 billion light-yrs away and at magnitude 20.4).

Can someone enlighten me how to convert the redshift to percent of the
speed of light? Also, Ioanni, I do have the regular image (white on black).

Anthony.


Anthony,

In SR the redshift formula is:

1 + z = SQRT[(c + v)/(c - v)]

Solving for v (recession velocity) yields:

v = [(1 + z)^2 -1/(1 + z)^2 +1]

An easier keypunch is:

v = (1 + z)^2 c - c/ (1 + z)^2 +1

Thanks Ben! I have a little Excel spreadsheet with the 15 brightest
quasars (for me to image) and I have added the above formula so that I
can convert at will when preparing the associated webpage for each new
quasar image.

Anthony.


Regards

Ben

On Mar 18, 2:37 pm, Anthony Ayiomamitis
wrote:
Dear Friends,

The quasar 3C273 in Virgo is the brightest visible quasar from Earth and
with a magnitude of 12.8 is also visible with average amateur equipment.
Lying at a distance of two BILLION light-years away, it is the furthest
any amateur equipment can reach (and especially right from one's backyard).

Further details including an image are available athttp://www.perseus.gr/Astro-DSO-QSO-3C273.htm.

It is a great shot. Unfortunately your diffraction spikes line up with
where the jet might hope to be seen (roughly diametrically oppposite
the fainter of the two close in stars. I suspect it may be beyond
impossible for amateur kit to capture by it might be interesting to
try for...

eg http://www.astr.ua.edu/keel/agn/3c273.html

Regards,
Martin Brown