Re: (IAAC) Burnham's Stars
This is a discussion from the 33-doubles group at Yahoo!
Groups from almost a year ago.
It doesn't contribute to the spetral discussion, but it shows
some of the problems with this star - especially its mass
Anyway, I adds more information to the dis
Note: I have all the measured data for these three stars
somewhere in my filing cabinet, that was gained from the US Naval Observatory in
Oct last yeat. When I find it, I'll add to what it says.
POST 33-double Yahoo Groups
From: "ariane1au" <andjames@o...>
Date: Sun Jan 13,
2002 10:16 pm
Subject: Re: Gamma Andromedae -
I have a little problem (some say it's a big one!) regarding
resolving the binary star Gamma Andromedae / Alamak / STT
(02039+4220) which is has been placed in a good position for
observation in the last months (and years).
I am writing some text on this colourful pair and I cannot
recent observaions. I looked at this pair in good seeing in 1982
split the two stars - but have observed it since. From the latitude
of Sydney, Australia at -34 deg it appears close to the
I liked the colour contrast, but presently the separation has
to 0.45" @ PA 105 deg. In my opinion it is a rival for Alberio (if
not better!) As the orbit is so eccentic we have good and bad times
see it - now is a bad time in thee 63-years period.
Does anyone have recent (or their last) observations of this
To clarify the last post, I am talking about the companion
resolution "BC" and NOT the main primary coloured pair STF 205A-
which is about 27.9" apart along PA 245, and as dead easy in
This is a triple star.
If you want to look at the eccentric orbit of STT 38 BC go
The Non Frames Page of the US Naval "Sixth Catalog" is
If you want to look at the elements.
----- Original Message -----
Sent: Thursday, January 23, 2003 11:55
Subject: Re: (IAAC) Burnham's Stars
Well, since we're
getting serious about this, :-) I took a look in the WDS database I downloaded
from the web and imported into Access 2000 and found 3 records for WDSNum
02039N4220. Here is a field breakdown for them:
Obs. PA Sep
STF 205 ASBC
Note that the PA and Sep info is
from the last observation (listed). Also note that the spectral class listing
for the first two entries is K3IIb. The data bible provided by the USNO states
that the spectral types of two components are provided where space permits. It
also says "See the Introduction for discussion." Unfortunately, the Bible
introduction does not seem to be available on the USNO website. At least I
could not find it after a brief search 5 minutes ago. Anyway, I don't know how
they're formatting multiple spectral type entries.
information, it seems possible that the spectral type is being reported in
applications like MegaStar and StarMap Pro only for the third entry.
One halfway suspects that the problem arises from the fact that
amateur astronomers have become so focused on more "glamourous" deep-sky
objects (like galaxies) that software designers haven't spent much time
sorting out the admittedly complex doublestar catalog issues. Thank you Mr.
PS: I also checked
Cartes du Ciel (the amazing free starmap software available on the internet)
and found that the Almach doublestar info reported STF 205 A-BC and listed the
primary as a spectral type K3IIb. It's been some months since I was messing
about with it, but I did spend some time generating WDS data files for one of
my starmap applications and it might have been Cartes du Ciel. (Can't recall
specifically.) Anyway, if I did generate WDS files for this program, I might
well have eliminated duplicate data entries from the file to fix reference
problems. This could account for why the STF 205 entry appears in Cartes du
Ciel on my computer.