LST? Wrong! Wrong! Wrong?

[Rusted]

Hi,

This is driving me around the Polar Axis! 

I usually use C-Du-C with ASCOM[AWR] to control my big, home made GEM.

But slews are going horribly awry. My slews overshot by miles every time!

My AWR IH2 handset is showing LST two hours ahead compared to all of the LST calculators I can find online. [Four so far and counting.]

Meanwhile, AWR alone on the IH2, is fine on slews until I connect the computer and open C-Du-C.

AWR is showing the correct time in RTC. As is C-Du_C and all the online calculators.

BUT!! C-Du-C is showing my easterly observatory site as + instead of -.  Is this the problem? Or simply a display error?

I'm on the other side of the North Sea from Gravely Blighted but C-Du-C shows a + whether I enter East or West for longitude!

I should be able to rest the C-Du-C cursor on the Southern horizon [Local meridian] to obtain LST directly.

However, C-Du-C insists on showing LST 2 hours behind AWR's.

Help, pretty please?

 

[Kev M]

The time zone is independent of the observatory site ( you could be 10 metres away from a different timezone and have almost the same lat/long ).

Make sure your longitude  is correct......East !

Make sure that your timezone is correct +2 Hrs

It sounds like one of them may be wrong.

 

-------------------

It would be a lot simpler if everyone just used UT and a separate clock for this and ignored local times.

 

 

Edited May 19, 2019 by Kev M

[Rusted]

32 minutes ago, Kev M said:

The time zone is independent of the observatory site ( you could be 10 metres away from a different timezone and have almost the same lat/long ).

Make sure your longitude  is correct......East !

Make sure that your timezone is correct +2 Hrs

It sounds like one of them may be wrong.

It would be a lot simpler if everyone just used UT and a separate clock for this and ignored local times.

 

Thanks Kev.

My longitude is East. My time zone is GMT + 2hrs.  [CET]

Both are set correctly in AWR and C-Du-C.

They still differ by two hours on LST and RA.

All of the online LST calculators show C-Du-C is correct for -10E and +2 hours.

So AWR must be wrong. But how?

 

 

[Rusted]

Fortunately the sun finally came out to give me a real sky target.

C-Du-C badly overshot on a Goto slew to the Sun after clicking on it.

So I reduced UT by two hours in AWR as it was showing local time.

Which immediately made the Sun's coordinates wrong in AWR.

Syncing on the sun in C-Du-C, with the telescope manually pointed to the Sun, solved that problem.

I now have matching LST and the correct coordinates.

Now I'll see if if it can find the parking spot and then slew back to the sun.

Success on both counts! Happy days are here again.. tra-la-la-la!

Edited May 19, 2019 by Rusted

[andrew s]

6 hours ago, Kev M said:

It would be a lot simpler if everyone just used UT and a separate clock for this and ignored local times.

 

 

I have all my computers on UT all the time. Only my wife's laptop has local time.

Can cause issues if I am an hour late for a date with her!

OP glad you got it fixed. I found a bug in the Astro Physics firmware if you were at GMT + 0 and syncing with a computer.

Regards Andrew 

[Rusted]

I'm glad you have the knowledge and skill to use UT.

Though isn't that a bit like relying on the Equation of Time to fix lunch time? 

[Davey-T]

My obs'y runs on UT.

Dave