Reed
member
Reged: 12/19/06
Posts: 83
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Howe 13 06h35.8m, -16d06m 7.8, 8.8; sep 12.6"
This one has me shaking my head. It should be relatively easy in my C102 refractor or my RV 6 reflector, but I can't see it as double.
Has anyone taken a look at it?
Reed
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asteroid7
Post Laureate
Reged: 10/19/04
Posts: 4273
Loc: CT
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Not yet, but it's on my "to do list"
Rich
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Clear Nights "Make My Day"
4.5" f/7 APM (TMB) APO Refractor CG5 GoTo with Orion extension tube
8" Celestron CPC (two)
Eyepieces:
40mm Pentax; 24mm Tele Vue Panoptic, 18mm Tele Vue Radian, 18mm HD Ortho, 15mm Celestron Omini,14mm Pentax,10mm Tele Vue Radian, 7mm,5mm & 3.5mm Nagler; 7.4mm Tele Vue Plossl.
2.5 Tele Vue Powermate
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SigurRosFan
member
Reged: 01/22/07
Posts: 37
Loc: Germany
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Where I can find a list of all Howe's binaries?
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clear skies - Nico
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Bonco
Post Laureate
Reged: 04/17/06
Posts: 3036
Loc: Florida
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I'm not familiar with Howe 13 but at 12" it should be easy pickings in both of your scopes. Are you sure you pointed at the right star??
Bonco
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RV6
Meade 2045
6 inch f/4 RFT R. Fagin Optics
TV Genesis
2.4 inch Lafayette Equitorial
3 inch Polarex Equitorial
10 inch Zhumell
PST 40mm Solar scope
4 inch F/15 Antares
2.4 inch Unitron Equitorial
Tasco 10K 80mm/1200mm (Carton)
Towa 339 Restored (Carton)
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acafar
member
Reged: 06/17/06
Posts: 60
Loc: Madrid, Spain
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As Reed points out HWE 13 should be fairly easy with 12" of sep., but I tried this binary tonight with a 100mm refractor ... also with no result 
rafa
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Reed
member
Reged: 12/19/06
Posts: 83
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I think I have the right star. It's listed on the WDS, Sky Catalogue 2000.0 and the SAC double list. It's plotted in Sky Atlas 2000 and Uranometria 2000.
Reed
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Reed
member
Reged: 12/19/06
Posts: 83
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I looked up Howe 13 on the STSCI survey and it looked single. I also looked up S 518 which has similar magnitudes and only 4" more of separation and it clearly shows as double.
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Reed
member
Reged: 12/19/06
Posts: 83
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Here's the S 518 picture.
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acafar
member
Reged: 06/17/06
Posts: 60
Loc: Madrid, Spain
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I also think I was looking at the right star. It can be readily located starting from Sirius, and the image in my eyepiece at 30x looked quite similar to the HWE 13 neighborhood shown by Cartes du Ciel (Sky Charts). However I could not appreciate the slightest elongation at any magnification. The data for HWE in the Washington Double Star catalogue says that the two components have mags. 7.51 and 7.38, which means that it should be even easier. 
rafa
Edited by acafar (03/15/07 07:21 AM)
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Bonco
Post Laureate
Reged: 04/17/06
Posts: 3036
Loc: Florida
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At 12" there should be no elongation at high power...just a clean split. I gotta try this star.
Bonco
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RV6
Meade 2045
6 inch f/4 RFT R. Fagin Optics
TV Genesis
2.4 inch Lafayette Equitorial
3 inch Polarex Equitorial
10 inch Zhumell
PST 40mm Solar scope
4 inch F/15 Antares
2.4 inch Unitron Equitorial
Tasco 10K 80mm/1200mm (Carton)
Towa 339 Restored (Carton)
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Reed
member
Reged: 12/19/06
Posts: 83
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It's that time of year again. Howe 13 is up and I still don't see it as a double.
Anyone else have any luck with this one?
Reed
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RLTYS
Post Laureate
Reged: 12/18/04
Posts: 4267
Loc: New York (Long Island)
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Quote:
Howe 13 06h35.8m, -16d06m 7.8, 8.8; sep 12.6"
Reed
I've would like to check out this star but when I plot these coordinates on my copy of Uranometria 2000 (Map 285) no stars are shown in that area. I then checked "Sinbad" and no stars were shown within a half degree of those coordinates.
Are these coordinates correct or am I just messing up?   
Thanks and clear skies.
Rich (RLTYS)
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10" F4.8 Refl.
4" F5 Refr. (Genesis)
3" F4 Celestron FirstScope
50mm F12 Refr. (Tasco #6TE-5)
12x63 and 10x50 Binoculars.
"I want to do more then just look."
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lunator
sage
Reged: 01/08/05
Posts: 231
Loc: London
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I had a quick look at this on the WDS database and it only has 2 measures. I think we could be looking at a co-ordinate error or a duplicate in the WDS.
I will have a look in that area tonight if it is clear.
Cheers
Ian
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RLTYS
Post Laureate
Reged: 12/18/04
Posts: 4267
Loc: New York (Long Island)
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Reed
After doing some reaserch I realize that I read the origional post wrong. 
The coordinates are correct.
Clear Skies.
Rich (RLTYS)
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10" F4.8 Refl.
4" F5 Refr. (Genesis)
3" F4 Celestron FirstScope
50mm F12 Refr. (Tasco #6TE-5)
12x63 and 10x50 Binoculars.
"I want to do more then just look."
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RLTYS
Post Laureate
Reged: 12/18/04
Posts: 4267
Loc: New York (Long Island)
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To All
I was also looking at Howe 13 last evening (3/2) with my 10" refl. Even at 254x the star appears single. I had just observed B19 CMa (7.1/9.0 Sep 3.0") so Hwe 13 should have been easy.
Check out the info for Howe 13 on "Simbad".
7.39/9.3 Sep 14.33" PA not given.
Clear Skies.
Rich (RLTYS)
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10" F4.8 Refl.
4" F5 Refr. (Genesis)
3" F4 Celestron FirstScope
50mm F12 Refr. (Tasco #6TE-5)
12x63 and 10x50 Binoculars.
"I want to do more then just look."
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Reed
member
Reged: 12/19/06
Posts: 83
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Hi Rich,
Thanks for checking it out. I don't suppose I can just call the Naval Observatory and have them direct the Hubble telescope to the problem. It may remain just one of those mysteries.
Reed
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RLTYS
Post Laureate
Reged: 12/18/04
Posts: 4267
Loc: New York (Long Island)
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Reed
In Sissy Haas's Double Star book she has this description from Ross Gould "Gould, 350mm, 110x: A "bright easy white pair, with two wide pairs also in the field.""
This sounds like the field we're observing in and he (Gould) must have seen something, to give this description. What are we doing wrong?
I'm confused.
Rich (RLTYS)
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10" F4.8 Refl.
4" F5 Refr. (Genesis)
3" F4 Celestron FirstScope
50mm F12 Refr. (Tasco #6TE-5)
12x63 and 10x50 Binoculars.
"I want to do more then just look."
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Catapoman
Pooh-Bah
Reged: 06/06/03
Posts: 1087
Loc: VA
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Last night I observed this region and I’m certain I saw this double. I was using my TSA-102 with 5mm BO/TMB at 163x and 0.37* TFOV. After starhopping from Sirius to the circled area in the chart below, I saw a pair with the companion obviously dimmer than the primary. The separation looked to be about 12” or so. The one thing that confused me was the companion appeared to be NNE which contradicts the PA listed on WDS from 1991. At the 1 o’clock position a saw a brighter single star and at the 3 o’clock position a little further away I saw the bright wide pair that in Gould’s description posted by Rich. There was also a dim triangular set of stars just past this brighter wide pair. Not sure if this is an asterism or a designated multiple star system. In the first STSCI survey image that Reed posted above (03/15/07) the pair I’m referring to is in the upper left corner. You can also see the bright wide pair (middle of image near top) and the triple system to its right.
I’m attaching a chart created form YourSky website. The chart represents a 5* FOV which is close to my 7x50 finder and I circled the region were Howe 13 is located with an arrow pointing at the star indicated as Howe 13 from Sky Atlas 2000 (Map 12) based on coordinates listed above. The magnitude limit on this chart is set at 9. When starhopping from Sirius using the 7x50 finder its glare was reaping havoc finding the region that is circled in the chart even though Sirius at the edge of the FOV. According to the charts I have, the two brighter stars inside the circle are doubles and the one with the arrow is Howe 13. I could only see 2 of the 3 stars between the two brighter ones through the finder, the above Howe 13 and one of the two left of the bright star on the right.
So do you all think that this was it?
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A 12.5" Dob, a Mewlon, 2 EDs and a GM-8.
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Reed
member
Reged: 12/19/06
Posts: 83
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Hi Pernel,
Well your chart certainly shows the correct position of Howe 13 as indicated by the arrow. I'll try again tomorrow evening and maybe even drag out my 10.1".
Thank you, Reed
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RLTYS
Post Laureate
Reged: 12/18/04
Posts: 4267
Loc: New York (Long Island)
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"I'm referring to is in the upper left corner. You can also see the bright wide pair (middle of image near top) and the triple system to its right."
Catapoman
Your finder chart is correct. But the star you refer to in the upper left corner isn't Howe 13. The stars are too wide apart and the PA is wrong. All the info I've located shows Howe 13 is the bottom single bright star below and to the right of the two stars you mentioned. This star, the two stars you mentioned and the two wider stars to the right form a large triangle. This triangle points down in the picture and Howe 13 is at the bottom of the triangle. (Hope this isn't too confuseing)
Clear Skies.
Rich (RLTYS)
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10" F4.8 Refl.
4" F5 Refr. (Genesis)
3" F4 Celestron FirstScope
50mm F12 Refr. (Tasco #6TE-5)
12x63 and 10x50 Binoculars.
"I want to do more then just look."
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