| Bill Becker | ||||
| Star:
17 Canis Majoris
Date & Time: Jan.3rd from 4:42 to 6:15 UT Seeing: 4 <1-10 Seeing Scale (10 best)> Location of site: Casper, Wy. USA Site classification: Suburban Sky darkness: 5 <Limiting magnitude> Telescope: TEC 6 Mak-Cass Magnification: ~51x(35mm Panoptic) |
What can I say....beautiful
quadruple with the primary lookingblue-white and the three 9th mag companions
looking reddish(B) andblue(C & D). The whole system seemed to form
the letter Y...very nice.
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| Daniel Osanai | ||||
| Star:
17 Canis Majoris
Date & Time: January 4th, 2002 21:42 UT Seeing: 9 <1-10 Seeing Scale (10 best)> Location of site: Lolog, Argentina 71º18´W, 40º02´S Site classification: Rural Sky darkness: 6.0 <Limiting magnitude> Telescope: Refractor Vixen 60S f/7 on equatorial mount & SS2K Eyepieces: ULTIMA 30 mm, Powermate 2.5x Magnification: 40x |
17 CMa lies at 2° NE
of M41, in the Heart of the "Big Dog" (Canis Majoris). 40x gives a rich
field of view where 17 CMa forms a rectangular triangle with the variable
star 15 CMa and pi CMa at similar magnitudes of 5. But centering
the17 CMa, the power could easily resolve the four components of the system.
Curiously, the distribution of ABCD´s seems to be "Jupiter and Galilean
satellites" with a bright object in the middle and dim satellites joined
it. So, as I did image, component A is too bright and white, and the other
components (BCD) are too dim (magnitudes about 9) and close to the primary,
seeming as orbits in the plane of component A equator. D is the outer component
and B lies above the plane. Planetary image ... ha!
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| Eddy O’Connor | ||||
| Star:
17 Canis Majoris
Date & Time: January 7th, 2001 10 p.m local; UT +10 Seeing: 5 <1-10 Seeing Scale (10 best)> Transparency: 8 <1-10 Seeing Scale (10 best)> Temperature: 20ºC Location of site: Terara, New South Wales, Australia 150º.38 E, 34º.52 S Site classification: Suburban-rural Sky darkness: No Moon. Telescope: 8" Newt. F9 Eyepieces: 25mm K, 12.5 mm Ortho Magnification: 73x, 146x Harshaw Scale: 1 <1-5; 1 best> |
Five stars are included
at low power at mag. 5.7/9.3/9 and 9.5. Worth defrosting your instrument
for this great field found in a small group of three stars clinging
like friendly fleas to the Dog's back. The naked eye group is composed
of 1,17 and 19 Cma.
Comments: I found five stars
in this field. The White primary is flanked by Reddish and Bluish stars
with a further two wide. This is a stunning cluster of stellar gems.
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| Glen Chapman | ||||
| Star:
17 Canis Majoris
Date & Time: 10/01/2002, 9:40 pm Seeing: 5 <1-10 Seeing Scale (10 best)> Transparency: 4 <1-10 Seeing Scale (10 best)> Location of site: Seven HIlls NSW, Australia Site classification: Suburban Sky darkness: --- Telescope: 8 inch Celetron Starhopper Magnification: 48x |
This extraodinary quad system
is located between Phi Cma and 19 Cma. It is a lovely field shared by the
more difficult B 2521. All the stars in combination go to form a funnel
shaped asterism point to 17 Cma.
No colour noted.
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| William Schart | ||||
| Star:
17 Canis Majoris
Date & Time: 21, January, 2002 From 10:00 pm CST. Seeing: ~ 6 <1-10 Seeing Scale (10 best)> Location of site: Killeen, TX, USA. Site classification: Suburban Sky darkness: <Limiting magnitude> Temperature: ~ 50ºF Telescope: Celestar 8" SCT Magnification: 80x, 120x and 200x
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At the eyepiece I was totally
confused. I got a totally wrong mental picture of the
geometry (astrometry) of this system from the data. When I looked this up in Redshift, I immediately recognized a system that I had seen and rejected. 4 stars arranged somewhat like this.
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