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54 Leo

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#1 StarDusty

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Posted 16 May 2013 - 09:17 PM

54 Leo
2013 May 14 10:07p at Parsippany
Home Made 6 f/12 Newtonian a top GEM
Multiple Star System in Leo, R.A. 10h56m21.1s Dec. +24°40'38", 4.3 mag, Alt 63°

Clear with Good Seeing
Imaged first with Imaging Source camera, 4 avi's captured with no barlow.

Observed Visually with
Sirius Plössl 10mm, 238x,Sirius Plössl 17mm, 140x,Sirius Plössl 40mm, 60x

Not cleanly split with 40mm.

Not a lot of color. Minor more blue. Major a little yellow. Both nearly white. Still a nice double.

Imaged Record attached:

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#2 JIMZ7

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Posted 23 May 2013 - 01:22 PM

A nice double nobody seems to talk about. Needs 6" or larger scope to enjoy it more. I have not looked for it in my current 10" scope. I did enjoy looking at it years back with a Coulter 8" f/7 reflector & saw blue & white in both stars. I've read somewhere that it was a blue/green double?

Jim :dob:

#3 7331Peg

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Posted 23 May 2013 - 02:37 PM

"A nice double nobody seems to talk about."

I wouldn't say THAT! :grin:

54 Leonis actually got quite a bit of comment HERE and HERE. (comments are at the end).


John :refractor:

#4 David Gray

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Posted 24 May 2013 - 12:40 PM

I frequently visit and enjoy this Forum and in spite of seeing this 54 Leo thread I had not immediately made the connection to an observation of mine when it was not far from Ceres in 2009. I had attempted a faithful representation of this fine double as a reference/contrast for scale and colour with Ceres (& Titan)- attached.

For some reason I had been thinking I had used 56 Leo (not even double!) so failed to realize till checking the observation recently!

We seem largely agreed on the blue colour of the companion, but I know that I saw not a hint of yellow in the primary, which was near white with a hint of bluish to me. Perhaps, given their early A-spectral types they are both fairly alike in hue but the primary looking whiter due to it’s brightness – especially in the 415mm D-K?

The original report is here: http://alpo-j.asahik...09/o090302z.htm

I am in process of reviving my rather long neglected double star observing, possibly sending some impressions in due course - here and the Sketching Forum.

David.

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#5 JIMZ7

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Posted 24 May 2013 - 04:09 PM

John very nice site--thanks!

Jim :dob:

#6 Dave Mitsky

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Posted 24 May 2013 - 06:52 PM

A nice double nobody seems to talk about.


54 Leonis is on my Celestial Calendar double star list for April:

Seventy-five binary and multiple stars for April: h4481 (Corvus); Aitken 1774, Gamma Crateris, Jacob 16, Struve 3072, h4456, Burnham 1078 (Crater); h4311, Burnham 219, N Hydrae, h4455, h4465 (Hydra); 31 Leonis, Alpha Leonis (Regulus), h2520, Struve 1417, 39 Leonis, Struve 1421, Gamma Leonis (Algieba), Otto Struve 216, 45 Leonis, Struve 1442, Struve 1447, 49 Leonis, Struve 1482, 54 Leonis, Struve 1506, Chi Leonis, 65 Leonis, Struve 1521, Struve 1527, Struve 1529, Iota Leonis, 81 Leonis, 83 Leonis, Tau Leonis, 88 Leonis, 90 Leonis, Struve 1565, Struve 1566, 93 Leonis, h1201, S Leonis (Leo); h2517, Struve 1405, Struve 1432, 33 Leo Minoris, Struve 1459, 40 Leo Minoris, Struve 1492 (Leo Minor); Struve 1401, Struve 1441, Struve 1456, Struve 1464, 35 Sextantis, 40 Sextantis, 41 Sextantis (Sextans); Struve 1402, Struve 1415, Struve 1427, Struve 1462, Struve 1486, Struve 1495, Struve 1510, Struve 1520, Xi Ursae Majoris, Nu Ursae Majoris, Struve 1541, 57 Ursae Majoris, Struve 1544, Struve 1553, Struve 1561, Struve 1563, 65 Ursae Majoris, Otto Struve 241 (Ursa Major)

Dave Mitsky

#7 cildastun

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Posted 26 May 2013 - 06:05 AM

Quite a nice double but not an exceptionsal pair IMO - easily split.
Colours (old eyes, 5" Mak, blueish-white and brownish).

Chris






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