Delta Crux

Just how variable a star is Delta Crux? I sometimes come out and look
up and the Cross seems to be missing its forth star and at other times
the fourth star is fairly bright. According to data I have the
variability should not have a major effect on the brightness - or am I
wrong ?


Eugene L Griessel

Experienced? Let me tell you lad, when God said: Let there
be light! I was the duty electrician.

On Apr 19, 7:19 pm, (Eugene Griessel) wrote:
Just how variable a star is Delta Crux? I sometimes come out and look
up and the Cross seems to be missing its forth star and at other times
the fourth star is fairly bright. According to data I have the
variability should not have a major effect on the brightness - or am I
wrong ?

Eugene L Griessel

Experienced? Let me tell you lad, when God said: Let there
be light! I was the duty electrician.

Maybe because you are viewing it at a fairly low altitude where both
the atmospheric extinction and skyglow is at its' worst.

Bill

wrote:

On Apr 19, 7:19 pm, (Eugene Griessel) wrote:
Just how variable a star is Delta Crux? I sometimes come out and look
up and the Cross seems to be missing its forth star and at other times
the fourth star is fairly bright. According to data I have the
variability should not have a major effect on the brightness - or am I
wrong ?

Eugene L Griessel

Experienced? Let me tell you lad, when God said: Let there
be light! I was the duty electrician.

Maybe because you are viewing it at a fairly low altitude where both
the atmospheric extinction and skyglow is at its' worst.

Currently about 50 degrees altitude by about 2100 hours. Sky gin
clear and virtually no skyglow. However last night, at about 2200
hours one had to stare for a while before delta crux could be
discerned . At 2340 it was immediately obvious. Both instances walked
out of the same lighted room to the same spot on my lawn and looked
up.

Eugene L Griessel

I try to make everyone's day a little more surreal.

"Eugene Griessel" wrote in message
...
wrote:

On Apr 19, 7:19 pm, (Eugene Griessel) wrote:
Just how variable a star is Delta Crux? I sometimes come out and look
up and the Cross seems to be missing its forth star and at other times
the fourth star is fairly bright. According to data I have the
variability should not have a major effect on the brightness - or am I
wrong ?

Eugene L Griessel

Experienced? Let me tell you lad, when God said: Let there
be light! I was the duty electrician.

Maybe because you are viewing it at a fairly low altitude where both
the atmospheric extinction and skyglow is at its' worst.

Currently about 50 degrees altitude by about 2100 hours. Sky gin
clear and virtually no skyglow. However last night, at about 2200
hours one had to stare for a while before delta crux could be
discerned . At 2340 it was immediately obvious. Both instances walked
out of the same lighted room to the same spot on my lawn and looked
up.

Eugene L Griessel

I try to make everyone's day a little more surreal.

A little bit of high cloud obscuring it a bit maybe?

Terry B
Armidale
NSW

(Eugene Griessel) wrote in news:46271795.4990979
@news.uunet.co.za:

Just how variable a star is Delta Crux?

Not trying to nitpick, but isn't it Delta Crucis? Or has the designation
changed and I never found out?

--
A: Because it disturbs the logical flow of the message.
Q: Why is top posting frowned upon?

elaich wrote:

(Eugene Griessel) wrote in news:46271795.4990979
:

Just how variable a star is Delta Crux?

Not trying to nitpick, but isn't it Delta Crucis? Or has the designation
changed and I never found out?

A rose by any other name ... yes, your nitpick is correct Delta
Crucis.

Eugene L Griessel

It is easier to get older than it is to get wiser.

On 20 Apr 2007 02:55:52 GMT, elaich wrote:

Not trying to nitpick, but isn't it Delta Crucis? Or has the designation
changed and I never found out?

If you're a Roman, or perhaps an astronomer who got stuck in the
linguistic conventions of the Middle Ages g.

I use Delta Crux, myself. The best way to change English usage is to
start with your own.

_________________________________________________

Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com

On Apr 20, 6:25 am, Chris L Peterson wrote:
On 20 Apr 2007 02:55:52 GMT, elaich wrote:

Not trying to nitpick, but isn't it Delta Crucis? Or has the designation
changed and I never found out?

If you're a Roman, or perhaps an astronomer who got stuck in the
linguistic conventions of the Middle Ages g.

I use Delta Crux, myself. The best way to change English usage is to
start with your own.

_________________________________________________

Chris L Peterson
Cloudbait Observatoryhttp://www.cloudbait.com

You can call it anything you like, but if you depart from
established conventions, you may find yourself doing
more explaining than communicating. Only you can
decide if it's worth the hassle.

Personally, my struggle is with ancient versus modern/
scientific pronunciation: is it "kroo-sis" (modern), or
"kroo-kis" (ancient)? Since the ancient pronunciation
is purely phonetic, I tend to memorize words that way.
Sorta like Castilian vs Latin American Spanish...

Laura Halliday VE7LDH "Que les nuages soient notre
Grid: CN89mg pied a terre..."
ICBM: 49 16.05 N 122 56.92 W - Hospital/Shafte

On 20 Apr 2007 09:11:33 -0700, laura halliday
wrote:

You can call it anything you like, but if you depart from
established conventions, you may find yourself doing
more explaining than communicating. Only you can
decide if it's worth the hassle.

It hasn't proved to be any problem. It occasionally comes up in
discussions like this, but otherwise requires no explanation. There's no
possibility of confusion (in fact, non-astronomers are _more_ likely to
be confused by the use of the Latin genitive- something I see
deliberately explained occasionally in articles), so communication isn't
a problem. Some people don't notice, some don't care, a few probably
think I'm semi-literate. But everyone understands.

_________________________________________________

Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com

Eugene,

Burnham's Handbook does not indicate any variability
for Delta Crucis. Neither do any of my charts.

But do you remember about seven or eight years ago
Delta Scorpius inexplicably brightened by 0.9 magnitudes
and has not faded since then AFAIKT. Might be a good
idea to keep an eye on it to determine if it's acting up.

Ben

Quid vespera ferat incertum est.
Livy