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  • Three Planets, Two Stars in Two Pairs.: January 12, 2017

Author Topic: Venus/Neptune conjunction, Mars and 96 Aquarii  (Read 1575 times)

Mark

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Venus/Neptune conjunction, Mars and 96 Aquarii
« on: December 23, 2016, 08:21:40 AM »
Venus and Neptune 25 arc-minutes apart tonight.  Mars and binary star 96 Aquarii 15-1/2 arc-minutes separation.  Double is mag 6.5 and mag 11 pair, 10.6 arc-seconds separation.  Anyone have a report on this binary?
« Last Edit: December 23, 2016, 09:37:41 AM by Mark »

Mark

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Re: Venus/Neptune conjunction, Mars and 96 Aquarii
« Reply #1 on: January 12, 2017, 04:21:38 PM »
Just a reminder, in case anyone's sky is clear this evening...

mccarthymark

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Re: Venus/Neptune conjunction, Mars and 96 Aquarii
« Reply #2 on: January 16, 2017, 12:01:51 PM »
I had a look at 96 Aqr last night using my 12.5” f/7.  I used Mars to aim the scope with my Telrad; it had moved well beyond where it was on New Year’s Day but was still in the 50mm finderscope view with 96 Aqr.  At 277x the pair (aka HJ 5394) was picked up right away.  The B star was faint but easy direct vision, sharpened with the seeing, and was slightly reddish; I estimated PA to the north.  According to Stelle Doppie A mag is 5.62, B is 10.39, separation 11”, PA 20°.  Seeing was 6-7/10 and transparency 3/5.

Later in the night I split doubles in Orion.  A highlight was STF 757: This was marked as a double star in my Cambridge Double Star Atlas but without designation.  It showed as a lovely double-double at 553x: All the stars were near equal magnitude at 8-9.  The pair to the east was well separated but another, to the west, was very tight, about 1 disk separation.  I stayed on this for a while since it was such a beautiful surprise.  After coming in and checking a double star catalog, I found it to be STF 757.  The AB pair is A mag 7.96, B 8.33 with 1.5”.  The other double is in fact two more pairs with A, AC (8.69 mag, 51.3”, PA 87°) and AD (8.52 mag, 41.9”, PA 79°).  There is an AE pair which I didn’t notice, and CD are listed as a pair.  Quite a sight.
Mark

sgottlieb

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Re: Venus/Neptune conjunction, Mars and 96 Aquarii
« Reply #3 on: January 17, 2017, 05:23:22 PM »
STF 757 and 758 sounds like a very nice double-double!

I don't know which of these are plotted on the Cambridge Double Star Atlas, but here's a list of some more close doubles in Orion that I've observed in my 18" (often with an off-axis 6" mask) --

14 Ori = ADS 3711 (5.8/6.7 at 0.8").  Split at 450x (in my 18") at Willow Springs
32 Ori = ADS 4115 (4.5/5.7 at 1.2").  Clean split with 6" mask at 490x.
33 Ori = ADS 4123 (5.7/6.7 at 1.9").  Split at 175x with 6" mask
52 Ori = ADS 4390 (6.0/6.1 at 1.0").  Clean split at 300x with 6" mask.
STF 849 = ADS 4730 (9.1/9.5) at 0.9").  Clean split at 490x.
STT 517 = ADS 3799 (6.7/7.0 at 0.65").  Clean split at 450x.
Ho 22 = ADS 4823 (8.5/8.6 at 0.9").  Clean split at 450x.

Mark

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Re: Venus/Neptune conjunction, Mars and 96 Aquarii
« Reply #4 on: January 17, 2017, 07:46:48 PM »
490X!  You're like the mad scientist of DSO's.

I'm glad McMark mentioned that Double Double, something else to look for.

DDK

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Re: Venus/Neptune conjunction, Mars and 96 Aquarii
« Reply #5 on: January 17, 2017, 11:25:30 PM »
McMark! That totally works. You will have noticed, Wags, with McCarthy joining the gang, we have Marks Wagner, McCarthy, Johnston, Buxbaum, Brada and certainly Bracewell.

And it's highly likely there are others lurking. Remarkable.
TAC - astro anarchy at work <*>

Mark

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Re: Venus/Neptune conjunction, Mars and 96 Aquarii
« Reply #6 on: January 18, 2017, 07:38:26 AM »
It can certainly become confusing when Johnston, McCarthy and I are all observing together.  So, we have Marko, Mark (Wags) and maybe now... McMark.

I am at this point just hoping for a clear observing weekend...

DDK

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Re: Venus/Neptune conjunction, Mars and 96 Aquarii
« Reply #7 on: January 18, 2017, 02:22:59 PM »
We'll mark down your wish for an observing window.
TAC - astro anarchy at work <*>

sgottlieb

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Re: Venus/Neptune conjunction, Mars and 96 Aquarii
« Reply #8 on: January 29, 2017, 05:19:57 PM »

Later in the night I split doubles in Orion.  A highlight was STF 757: This was marked as a double star in my Cambridge Double Star Atlas but without designation.  It showed as a lovely double-double at 553x: All the stars were near equal magnitude at 8-9.  The pair to the east was well separated but another, to the west, was very tight, about 1 disk separation.  I stayed on this for a while since it was such a beautiful surprise.  After coming in and checking a double star catalog, I found it to be STF 757.  The AB pair is A mag 7.96, B 8.33 with 1.5”.  The other double is in fact two more pairs with A, AC (8.69 mag, 51.3”, PA 87°) and AD (8.52 mag, 41.9”, PA 79°).  There is an AE pair which I didn’t notice, and CD are listed as a pair.  Quite a sight.

I had a look at the STF 757/758 "double-double" last night while observing at Lake Sonoma.  This is a beautiful quadruple!  The seeing was good, so even at 200x I could cleanly split the 1.5" pair using an 8-inch mask on my 24" and of course the 11" pair just east was easy at any power.  Excellent recommendation, Mark!