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Old 24-02-2018, 08:04 PM
bigjoe (JOSEPH)
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Righto you’re on. I’ll be set up by 9:30.
Myself a few later around 1030pm ..who else is game for a few tonight !
bigjoe.

Last edited by bigjoe; 24-02-2018 at 08:05 PM. Reason: Add
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Old 24-02-2018, 09:52 PM
Wavytone
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I skipped straight to 32 Orionis... a nice one and easily split despite poor seeing. 52 was harder but glimpsed as double at 450X, two little Airy disks touching (Dawes limit for this scope is 0.5 arc sec). Should be straightforward in decent seeing.

First decent look at the moon too through this beastie... awesome. Might have a go at rigging up a camera sometime given the planets in a few months time.

Didn’t hang around though as it’s a horrible night 30 degrees and 90% humidity.
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  #23  
Old 24-02-2018, 10:36 PM
bigjoe (JOSEPH)
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I skipped straight to 32 Orionis... a nice one and easily split despite poor seeing. 52 was harder but glimpsed as double at 450X, two little Airy disks touching (Dawes limit for this scope is 0.5 arc sec). Should be straightforward in decent seeing.

First decent look at the moon too through this beastie... awesome. Might have a go at rigging up a camera sometime given the planets in a few months time.

Didn’t hang around though as it’s a horrible night 30 degrees and 90% humidity.
Im going to report morrow perhaps Wavy.. quickly split all except 52 tonight; you got 52 kissing with some black between sometimes? If so thats very good....pretty ordinary night for splitting anyhow...So need to retry.

TOUGH 52 Orionis in Skysafari Pro screenshot below.

bigjoe.
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  #24  
Old 25-02-2018, 07:07 AM
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Righto you’re on. I’ll be set up by 9:30.
I was set up by 2030 last night, first quarter moon below Orion.
Using my 106mm refractor (easiest set up) as I was unsure how long I would get going on the forecast.
Well I got a great two hours and the seeing was quite steady, bagging the first six on Joe's list before moving into Canis Major. I avoided 32 & 52 as I have large trees to the north and west and stars at this declination just graze the top leaves of those trees.

Amazing that I could observe at all, since it promised rain in the afternoon and now has delivered down here in the Highlands.
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  #25  
Old 25-02-2018, 08:57 AM
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Cloudy. Say no more.
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Old 25-02-2018, 01:02 PM
rrussell1962
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Utterly clouded out in Brisbane, but have dug out some observations of Orion doubles from the past 12 months with varying equipment. These are what I wrote down at the time except the magnifications which I have added. The notes were never intended for public consumption so are very brief, but I didn't want to start adding things with hindsight. I will make better notes in future! Quite often I set up 2 telescopes for comparison purposes, I hope I have not mixed up which one I was using. If you think I may have done, please point it out.

30/1/17 Seeing good 8/10 Vixen ED80 F9
Rigel 5LVW Good view, well split, secondary v.clear x144
Pi3 Ori 5LVW Primary yellowish, secondary v. faint x144
Rho Ori 8LVW Primary yellowish, secondary blue speck x90
Struve 667 8LVW, orange hue, secondary off white. x90
23 Ori 8LVW both blue / white. x90
Wnc2 8 LVW, close but easy split, equal brightness. x90
Eta Ori 5LVW, very elongated, split at times. x144
33 Ori, 5 LVW, clear split x144
Lambda Ori, 8 LVW, split, easier with 5 LVW x90 x144
Iota Ori, 8 Ethos, secondary lovely faint speck x90

1/2/17 Vixen VC200L, seeing OK 7/10 with better moments
Wnc2 13LVW and 10 Delos, clear split x138 x180
Eta Ori, 13LVW, 10Delos, 8LVW split at moments, 5LVW pushing too far with seeing x138 x180 x225 x360
33Ori 10Delos, clear glimpses, 8Ethos same x138 x180
32 Ori 8Ethos, just split at times x225
31 Ori, 8Ethos gold and faint blue x225

4/2/17 Vixen ED80 F9 Seeing good
Alnitak, clear split 3.5LVW pushing it! x206
Eta Ori, split 5LVW, better 3.5LVW when seeing steady, just split x144 x206
Eta Ori, old Vixen 0.965 5mm Ortho and diagonal, just split but V CLEAR c/w LVW x144

17/2/17 Nexstar 8SE 7/10 seeing
14 Ori Elongated but can’t say good split 8LVW x254
Alnitak 8LVW clear x254
32 Ori 10 Delos 8LVW both close but clear x203 x254
Trapezium 13 LVW E and F visible.

8/2/18 Obsession 18 F4.5 P/Corr Trans 6/10 Seeing 7/10
Rigel mostly steady, Capella Some twinkling @ 1 sec intervals
8Ethos Orion doubles x291
Iota, lovely triple!
Sigma, nice splits, good!
Struve 761, 3rd star wide
Lambda (Meissa) Clear, nice
52 Ori, easy split tonight, equal and f.bright tried 8LVW - split but not as good
Alnitak, nice, clear
42 Ori,
32 Ori
Eta Ori nice split
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  #27  
Old 25-02-2018, 01:39 PM
bigjoe (JOSEPH)
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Originally Posted by The Mekon View Post
I was set up by 2030 last night, first quarter moon below Orion.
Using my 106mm refractor (easiest set up) as I was unsure how long I would get going on the forecast.
Well I got a great two hours and the seeing was quite steady, bagging the first six on Joe's list before moving into Canis Major. I avoided 32 & 52 as I have large trees to the north and west and stars at this declination just graze the top leaves of those trees.

Amazing that I could observe at all, since it promised rain in the afternoon and now has delivered down here in the Highlands.
Poor seeing, and humid here in Sydney last night John bagged all except 52.

31 Orionis..A very attractive pair..easily split at near any magnification even in 20mm Vixen NLV ...big Orange Primary and small Blue fainter secondary, a real treat and highlight so far for me in the 130mm Triplet with Tak 9mm Abbe Ortho.
Had a quick crack at 52 Orionis with the Tak TOE Ortho at 275x , but unsuccessful so far...still got the month to try.

bigjoe.

Last edited by bigjoe; 25-02-2018 at 01:41 PM. Reason: Adding
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  #28  
Old 25-02-2018, 01:44 PM
bigjoe (JOSEPH)
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Originally Posted by Tinderboxsky View Post
Cloudy. Say no more.
Been ordinary here too Steve..still got near a month for us to try crack all of them.

I think some of next months selections we have planned will be a bit tougher even.

bigjoe.
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  #29  
Old 25-02-2018, 01:45 PM
bigjoe (JOSEPH)
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Originally Posted by rrussell1962 View Post
Utterly clouded out in Brisbane, but have dug out some observations of Orion doubles from the past 12 months with varying equipment. These are what I wrote down at the time except the magnifications which I have added. The notes were never intended for public consumption so are very brief, but I didn't want to start adding things with hindsight. I will make better notes in future! Quite often I set up 2 telescopes for comparison purposes, I hope I have not mixed up which one I was using. If you think I may have done, please point it out.

30/1/17 Seeing good 8/10 Vixen ED80 F9
Rigel 5LVW Good view, well split, secondary v.clear x144
Pi3 Ori 5LVW Primary yellowish, secondary v. faint x144
Rho Ori 8LVW Primary yellowish, secondary blue speck x90
Struve 667 8LVW, orange hue, secondary off white. x90
23 Ori 8LVW both blue / white. x90
Wnc2 8 LVW, close but easy split, equal brightness. x90
Eta Ori 5LVW, very elongated, split at times. x144
33 Ori, 5 LVW, clear split x144
Lambda Ori, 8 LVW, split, easier with 5 LVW x90 x144
Iota Ori, 8 Ethos, secondary lovely faint speck x90

1/2/17 Vixen VC200L, seeing OK 7/10 with better moments
Wnc2 13LVW and 10 Delos, clear split x138 x180
Eta Ori, 13LVW, 10Delos, 8LVW split at moments, 5LVW pushing too far with seeing x138 x180 x225 x360
33Ori 10Delos, clear glimpses, 8Ethos same x138 x180
32 Ori 8Ethos, just split at times x225
31 Ori, 8Ethos gold and faint blue x225

4/2/17 Vixen ED80 F9 Seeing good
Alnitak, clear split 3.5LVW pushing it! x206
Eta Ori, split 5LVW, better 3.5LVW when seeing steady, just split x144 x206
Eta Ori, old Vixen 0.965 5mm Ortho and diagonal, just split but V CLEAR c/w LVW x144

17/2/17 Nexstar 8SE 7/10 seeing
14 Ori Elongated but can’t say good split 8LVW x254
Alnitak 8LVW clear x254
32 Ori 10 Delos 8LVW both close but clear x203 x254
Trapezium 13 LVW E and F visible.

8/2/18 Obsession 18 F4.5 P/Corr Trans 6/10 Seeing 7/10
Rigel mostly steady, Capella Some twinkling @ 1 sec intervals
8Ethos Orion doubles x291
Iota, lovely triple!
Sigma, nice splits, good!
Struve 761, 3rd star wide
Lambda (Meissa) Clear, nice
52 Ori, easy split tonight, equal and f.bright tried 8LVW - split but not as good
Alnitak, nice, clear
42 Ori,
32 Ori
Eta Ori nice split
Thanks for this Rus ..I'll sift through them and have a look at my reports.
bigjoe.
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  #30  
Old 25-02-2018, 04:47 PM
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Yes, still some time left. However, with the very long and later twilights down here it will not be long before Orion is too low to chase the closer doubles.

Just a thought as you prepare the next list of double star targets; would it be worthwhile starting a new thread for each new list. It may make following members reports and comments a bit easier.

Quote:
Originally Posted by bigjoe View Post
Been ordinary here too Steve..still got near a month for us to try crack all of them.

I think some of next months selections we have planned will be a bit tougher even.

bigjoe.

Last edited by Tinderboxsky; 25-02-2018 at 04:48 PM. Reason: Correction
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  #31  
Old 25-02-2018, 05:20 PM
rrussell1962
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It was interesting going over my notes for the past year. What stands out, to me at least, is that aperture does make a difference. What typically happens with my Obsession in Brisbane is that I take it out to around the same temperature as the house where it is stored shortly before sunset and it performs well for an hour. Then the temperature drops and it all goes to S*&t for an hour or so. Then is slowly comes up to speed and after 4 hours or so it is seeing limited and will basically do anything I want it to do. Oddly enough the Nexstar 8SE, despite the corrector plate, cools quicker than the VC200L - when cooled there is not a lot to choose between them, despite what "You Know Who" on Cloudy Nights might say. I have just acquired an ED100 and am looking forward to using it on doubles in the coming year. A lot of my double observations are part of my, incessant ongoing attempts to collimate my VC200L. I have the feeling that it is a very nice telescope, but a bit more fiddling with the Primary / Secondary spacing is needed, it does not "snap" into focus just yet. When it gets to that time of the year I will have a crack at Beta Muscae again.
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  #32  
Old 25-02-2018, 06:45 PM
Bombardon (Eugene)
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Great effort, Joe and all who have taken up the challenge on what is rapidly becoming the Southern Star Splitters! I think Joe has not only come up with a great introductory list for Orion but he has even sent many of us back to our notes from past viewing sessions.
Joe has covered all important aims and objectives in the group, especially making sure that the size of optics and experience don't matter and so long as we all get out to our favourite viewing spot and surprise ourselves with doubles visited for the first time or the tenth, and share our notes, we will all benefit. Personally, most of my splittings have been on easy separations, being a Dobson fan for many years and suffering from skies that are often disturbed by my closeness to a river and the evening fog and moisture that results. I promise to attempt the closer 'Oysters' from now on.
Ki9nd regards and good splitting to all, Eugene
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Old 25-02-2018, 06:47 PM
Bombardon (Eugene)
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I missed an early start on what a viewing buddy down here tells me was a bottler last night but I am adding a report on five from January in 2017.
These five In January 2017 using 10” F5, 13 mm Hyperion Eyepiece .
Zeta Ori (Alnitak);RA 05hrs. 40.7mins; Dec -01° 57’; c) 2.6”; d) 166 e) m 1.9; 3.7. This is a challenging double but worth the effort. I needed my highest power eyepiece x250 to separate, yielding a stunning Yellowish and White close pair that will need a 4” lens and good seeing to prise apart. I found an aperture reducing mask helped.
31 Ori; b) RA 05hrs 29.7 mins; c) 12.8”; d) 87°; e) m 4.7; 9.7
This one barely rates a mention in the annals and lies neglected near Orion’s Belt(see map below). However, though seen for the first time this season, I found the contrasting brightness and colour on medium power x180 made this a classic already in my collection. Primary orange with a faint blue companion in a rich field.
Rho Ori; b) RA 05hrs 13.1 mins; c) 7.1”; d) 64° ; e) m 4.6; 8.5
Rho(ρ) looks a little off the beaten track, but it is well worth the search. Again, a stunning contrast: primary, orange and its faint companion a light blue which seems well separated at medium power.
contd
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Old 25-02-2018, 06:49 PM
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Sigma Ori; b) RA 05hrs 18.7mins; c)11.5”; d) 238°; e) m 3.7; 8.8.

I have left the best till last. Sigma (σ) is familiar to Horsehead hunters, sitting as it does just outside the field but often passed over. All double hunters are in awe of this one. First observed 250 years ago, it was found to be two separate star systems forming a wedge-shaped grouping in the field. My drawing made at the eyepiece suggests two groups of three stars with the sixth star some distance east (front to back of ‘wedge’ is approx. 8’). Under high power the brightest of the seven, stf 3135 I have split to make 8 stars in the field. It looks like a planetary system in a moderate eyepiece with white and blue stars whose formation is reminiscent of the close packed Saturn satellites when the rings are edge-on.



Rigel.B Ori. This is a challenge to me and split with my 9mm Meade HD60 on about one night in 4. High cirrus often helps or early evening stillness.



Kind regards and good viewing to all star splitters everywhere.
Eugene
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  #35  
Old 25-02-2018, 07:16 PM
bigjoe (JOSEPH)
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Originally Posted by Tinderboxsky View Post
Yes, still some time left. However, with the very long and later twilights down here it will not be long before Orion is too low to chase the closer doubles.

Just a thought as you prepare the next list of double star targets; would it be worthwhile starting a new thread for each new list. It may make following members reports and comments a bit easier.
Absolutely Steve.

Next will be posted as a New thread ..No sense in dragging an old full thread out, and trying to look for information etc.

Next posts selection list will attend to our more southerly members...and We'll be putting up a list, and invite you and others for that months input and suggestions.

Will do in 2 weeks or so ,to prepare early.

Cheers bigjoe.
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  #36  
Old 25-02-2018, 07:38 PM
bigjoe (JOSEPH)
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Originally Posted by rrussell1962 View Post
It was interesting going over my notes for the past year. What stands out, to me at least, is that aperture does make a difference. What typically happens with my Obsession in Brisbane is that I take it out to around the same temperature as the house where it is stored shortly before sunset and it performs well for an hour. Then the temperature drops and it all goes to S*&t for an hour or so. Then is slowly comes up to speed and after 4 hours or so it is seeing limited and will basically do anything I want it to do. Oddly enough the Nexstar 8SE, despite the corrector plate, cools quicker than the VC200L - when cooled there is not a lot to choose between them, despite what "You Know Who" on Cloudy Nights might say. I have just acquired an ED100 and am looking forward to using it on doubles in the coming year. A lot of my double observations are part of my, incessant ongoing attempts to collimate my VC200L. I have the feeling that it is a very nice telescope, but a bit more fiddling with the Primary / Secondary spacing is needed, it does not "snap" into focus just yet. When it gets to that time of the year I will have a crack at Beta Muscae again.
Heard that the VC200L has a special coated and figured mirror that can only be redone at the factory if needed, but has very flat, sharp field and is not that easy to collimate... heard the VMC 260s virtually arrive out of collimation most times.
The C8 has smaller obstruction, no diffraction spikes, no open tube currents too, and should have better contrast on Planets...though not the build quality of Vixens.
Finding myself the refractors and Maksutovs , generally are ready quicker than an SCT or big Dobs or variations of...

If seeing good, aperture and quality still rules of course.
PS:Beta Muscae..now thats tough.

bigjoe.
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Old 25-02-2018, 08:04 PM
bigjoe (JOSEPH)
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Originally Posted by Bombardon View Post
I missed an early start on what a viewing buddy down here tells me was a bottler last night but I am adding a report on five from January in 2017.
These five In January 2017 using 10” F5, 13 mm Hyperion Eyepiece .
Zeta Ori (Alnitak);RA 05hrs. 40.7mins; Dec -01° 57’; c) 2.6”; d) 166 e) m 1.9; 3.7. This is a challenging double but worth the effort. I needed my highest power eyepiece x250 to separate, yielding a stunning Yellowish and White close pair that will need a 4” lens and good seeing to prise apart. I found an aperture reducing mask helped.
31 Ori; b) RA 05hrs 29.7 mins; c) 12.8”; d) 87°; e) m 4.7; 9.7
This one barely rates a mention in the annals and lies neglected near Orion’s Belt(see map below). However, though seen for the first time this season, I found the contrasting brightness and colour on medium power x180 made this a classic already in my collection. Primary orange with a faint blue companion in a rich field.
Rho Ori; b) RA 05hrs 13.1 mins; c) 7.1”; d) 64° ; e) m 4.6; 8.5
Rho(ρ) looks a little off the beaten track, but it is well worth the search. Again, a stunning contrast: primary, orange and its faint companion a light blue which seems well separated at medium power.
contd
Yes Eugene.....

RHO ORIONIS (p ) 6.9"*** PA 62°
AB:* MAGS 4.5/ 8.5* ...... I see Golden Orange Primary*, tiny deep blue secondary....absolute Gem visually RA 5HRS 13.1m DEC +02 51
40...FIND OF THE NIGHT.....

Detected in 20mm Vixen NLV and split easliy with 8mm DUAL ED OR TAK 6mm Abbe at 150x in the 910mm Triplet.


32 ORIONIS* PA 44° SEP* 1.3" Brightest star just inside Orion near bellatrix MAGS* 4.44, 5.75 .......used 3.3mm Tak Toe Ortho at 276x .... 1big* white , 1tiny yellow orb hugging the bright primary* kissing to split at times.* RA 05h 30m 47s DEC +05°56m 53s

Sep given in Eaglecreek obeservatory IS WRONG* not 0 .7".


SAIF AL JABBAH (ETA
ORIONIS)* PA 77°SEP 1.8"..
AB:* Magnitudes 3.63, 4.89** RA 04 24 09* DEC -02 23 50
I see a* big blue white primary and dimmer secondary whitish green.
Used 3.3 TAK TOE ORTHO AND 3.3mm DUEL ED..some lateral colour in this EP though easily did the split

ZETA ORIONIS Alnitak:* Actually a triple A, B, C.
PA* 164°Magnitudes A: 1.77 , B: 3.7 , C: 9.6
Separation AB: 2.18″***** BC: 58.0″.

1big brilliant white with fainter small blue white secondary separated cleanly,* fainter* tiny white C nearby . ..A B split with DUAL ED 3.2mm at 284x* or Tak* TOE 3.3mm* ortho cleaner at 275x.

RIGEL.....* sep 9.5"** Mags AB: 0.28, 6.8 .....** PA 202°** Brilliant big Blue white Primary , small greenish white companion well clear .... and easily split in the TS refractor and* 6mm Abbe151x or 5mm Dual ED easy at 170x in* about* 2" to 3"* seeing** what do you see?***** RA 05H 14M 32S**** DEC -08d 12m 06s.

SIGMA ORIONIS.... σ Orionis .... Superb
Multiple Star... AB Combined at* Mag* 3.7 too close to separate for anyone,*** and star C at mag 8.7* at Sep 11.6 "* away from AB...with 2 magnitude 6.6 stars* Called D and E at sep 12.7"* and 41.50" respectively from the AB pair.......RA 05h 38m 45s* DEC -02° 36m 00s

BEAUTIFUL at any mag I tried ..A JEWEL of the sky like Beta Monocerotis.
Primary AB combo, creamy white, D and E appeared blue and faint purple respectivley. Faint C a white colour on the other side of AB.


31 ORIONIS.... SEP 12.8"* PA 87°.. mags 6.0 ,11.1 ......with 130mm Refractor* at 91x using a 9mm Tak Ortho....Another absolute GEM.* RA 05h 29m 44s* DEC -01°05m 32s
Using 20mm vixen NLV beautiful Orange Star much fainter blue companion..dont use too much power on this...as secondary could dissapear.


Attempted 52 but not much time ordinary seeing and will report back.

bigjoe

Last edited by bigjoe; 25-02-2018 at 08:07 PM. Reason: Add
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Old 25-02-2018, 09:37 PM
rrussell1962
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I think I have some notes about Beta Muscae somewhere, probably signalling a lack of success! 52 Ori - can't find any reference to splitting it cleanly and consistently other than in the Obsession on a good night when the mirror had cooled. But my observing notes are somewhat haphazardly organised. It would be nice to go through them all and organise by constellation and object type. Effectively they are in season order so it would be possible.
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Old 25-02-2018, 10:12 PM
bigjoe (JOSEPH)
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I think I have some notes about Beta Muscae somewhere, probably signalling a lack of success! 52 Ori - can't find any reference to splitting it cleanly and consistently other than in the Obsession on a good night when the mirror had cooled. But my observing notes are somewhat haphazardly organised. It would be nice to go through them all and organise by constellation and object type. Effectively they are in season order so it would be possible.
Beta Muscae, Rus....
Some sources quote it at 0.7".. others 1.0" or near that......its tough for sure ..luckily the components are near equal magnitude.

I did it once in a SW BD 7.1" maksutov ..Have yet to retry.

bigjoe.
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Old 25-02-2018, 11:34 PM
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Thank you Joe for the warm welcome.
That's a nice list, nicely followed by the maps. You've done such great work here. There's a fantastic book I have, which you may be interested in looking up, it's called Sky & Telescope - Stargazing Series - Double Stars for Small Telescopes, by Sissy Hass. It tells you all the info incl. what they look like (lots of Hartung's obs notes!). I just looked up Orion and wow 5 pages!

Hey, you forgot the showcase of them all!
Theta Ori - The Trapezium.

I used to do some of our monthly observing challenges and I can respect & understand how much work goes into these challenges, so good on ya! I used to break mine down into easy, medium & difficult. I found it more fun doing a challenge per constellation, you get to have a more personal experience with it, it's very rewarding. I used to take ideas on one thread (such as this) and then post the actual challenge on a separate thread so it can be easily searched for in the future.

I've been wanting to get into double star observing for a long time, uptil now it's only been the odd one here and there.
It's been enjoyable reading people reports on here.

I should give this a shout out on our fb page , hopefully give it a bit more publicity to attract more observers. I'll do it when the list is ready, I presume it'll be a March challenge .
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