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Setting up a calendar
#1
Hello,

I have written a crude program for creating an observation calendar. Sample output is attached. It takes a list of objects (rows) and indicates for a number of days (columns) time and highest altitude during the period from astronomical night to my bedtime.

Question: can one do something like this in ST4?

With best regards,  tiha


Attached Files
.pdf   EasyMessier.pdf (Size: 16.07 KB / Downloads: 16)
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#2
I trust that you aren't using the SkyTools forum to promote your own software... To answer your question, yes, of course SkyTools does this sort of thing, although it ultimately provides much more information than the altitude alone. Your formatting is very nice.
Clear skies,
Greg
Head Dude at Skyhound
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#3
Hi Greg,

no I am definitely not a competitor but rather a novice user of SkyTools. I wrote my little program in Mathematica to help with planning and would much rather produce something equivalent in SkyTools. But how?

I tried the Ephemirides in ST but that will do a single object only (unless I missed something).

Speaking of the ST Ephemerides: the “At intervals of” input is inaccessible for me.

All the best, tiha
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#4
Hello,

Sorry. I was in a hurry this morning and I didn't read your message as carefully as I should have. For some reason I also thought you were a prospective buyer--I didn't realize you already owned SkyTools.

Rather than focus on a specific capability, let me turn your question around. What is it that you are trying to accomplish? How do you plan to use this specific information? E.g. are you writing a book?

While SkyTools does have the ability to do this sort of calculation for a single object with the Ephemeris and the Object Info, it can't do what you are asking specifically. The main reason for this is that is, once you have this information, how would you use it? Ultimately we can't observe on more than one night at a time, so SkyTools focuses on that: planning for the next night you intend to observe. Its the same information, but put to use more specifically rather than as an abstract.

In other words, in my view, it is much more useful to know what you can observe tomorrow night, or on March 12, rather than the Crab Nebula is a Winter object.

The intervals are only valid for the Position and Binary star ephemeris. My guess is that you have the Nightly Observing Ephemeris, which always operates on a daily basis.
Clear skies,
Greg
Head Dude at Skyhound
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#5
Hi Greg,

Thank you, first of all, for following up on this.

You may well be right and my motivation for developing this may reflect more on my inexperience and the unseasonally cold weather here in Virginia than serve as a legitimate use case. I received my first telescope a week or two ago, have had no previous exposure to astronomy, and it is too cold outside to use it so I thought I do some planning. Pretty soon my observation lists were getting longer and longer and I was getting more and more confused about what to do once the weather turns a bit more gentle.

With that said, I will add that the output calendar does give me a better sense on what best to prioritize over the 10-20 days in terms of reading up on the objects, figuring out how best to find them and such. But, again, that may be just my inexperience.

All the best, tiha
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#6
I think its really cool that you have already been able to make your own spreadsheets!

I think you will find that the objects available don't change that quickly. It's more of a slow progression week after week, of a few new objects moving into the prime observing time, and a few slowly moving out. This is one of the reasons it makes sense to plan one night at a time. Other than moonlight, next week isn't going to be all that different.

Think of observing with your telescope as a four step process:

1. Find objects that you are interested in. Some people really love planetary nebulae, others enjoy comets, etc. As someone starting out, your best bet is to try a little of everything. I suggest finding a good handbook. In the northern hemisphere the Messier objects are a great place to start. Or if you don't mind going old-school, find an old copy of Burnish's Burnham's Celestial Handbooks and use the volume for this time of year. As you master the software, you should create a custom list of objects that catch your eye somehow: perhaps you read an article or saw an HST image or something. When you go out to observe, put this list into the Nightly Planner to see which ones are available that night. There is no reason you can't plan from multiple lists.

2. Load an observing list into the Nightly Planner that includes the objects that you are going after, maybe from the handbook, e.g. the Messier list, or the appropriate Burnham's lists. Get Observing Lists --> Browse Skyhound --> select the Handbooks folder.

3. Set the next night you are likely going to observe on the planner. Not every object is going to be appropriate for your location and telescope. An object may never rise from your latitude, or it may be too faint to see in your telescope from your usual location. So the next step is to filter those out. In SkyTools, this is combined with the last step:

4. Set your Quality and Difficulty filters. I recommend: Best Quality Only and Visible (at any Difficulty). This will remove all of the objects from the list that you don't want to look at on that night, leaving a list of objects that you will get a good view of and are appropriate for your telescope/location. This calculation uses algorithms that take everything into account, including the type, size/magnitude of the object, the amount of light pollution, moonlight, your latitude, time of year, telescope optics, eyepieces, and even your own eye. This makes it easy. Each of the remaining objects will have a time they will be available to view that night. One thing you could do is to click on the top of the Best column to sort it in order. Then view each object near its best time.

If you control your telescope mount with SkyTools you can use a different approach. You can also use the Real Time tools to plan while you are out at the telescope. These tools will recommend objects from your lists that are available right at that moment.

Keep an eye on out tutorials, as I will be adding news ones soon: https://www.youtube.com/playlist?list=PL...73IGuOhTwA
Clear skies,
Greg
Head Dude at Skyhound
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#7
Many thanks, Greg, for the advice. All the best, tiha
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#8
If you're interested in things like meteor showers, solar & lunar eclipses, Jupiter's moons, planetary appulses & much more, check out the Event Finder tab. ST4 can predict these events months in the future for you. Just more things to look at, some of which don't require a telescope at all.

Phil S.
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#9
Hi,

many thanks to both of you.

Listing attitudes day-by-day does indeed make very little sense (as Greg pointed out) so attached an improved version 90 days out at 6 day intervals and sorted by urgency. I still like this but am admittedly somewhat pig-headed :-)

All the best, tiha


Attached Files
.pdf   EasyMessier_02.pdf (Size: 17.49 KB / Downloads: 3)
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