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Sphinx mount support for non sidereal tracking

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#1 DesertRat

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Posted 18 July 2009 - 01:31 PM

The specs advertised by Orion indicate Sidereal, Solar, and Lunar tracking rate support for the Vixen Sphinx mounts. Can anybody confirm this? I see nothing in the Starbook manual or other documentation on the web that indicates this is so.

Glenn

#2 amys

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Posted 18 July 2009 - 06:14 PM

I don't recall seeing anything in the starbook about different tracking rates.

#3 Renae Gage

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Posted 19 July 2009 - 01:22 AM

Would you expect to? Since the mount knows which objects you are tracking, there wouldn't be any reason to have to set the appropriate rate. I would think that software would take care of it.

#4 adamsp123

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Posted 19 July 2009 - 04:46 AM

IIRC my mount tracked the moon for over an hour spot on, I started some observing then clouds came in, hour plus later the skies cleared and the moon was still in the centre of view.

#5 Luigi

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Posted 19 July 2009 - 06:11 AM

>>> Since the mount knows which objects you are tracking<<<

That's only if you've done a sky alignment and are using go-to. I would hope that for the main objects where different rates matter, the Moon or Sun, no alignment or go-to is needed. :grin:

#6 DesertRat

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Posted 21 July 2009 - 04:20 PM

An example might help to clarify my question. Assume you wish to track a feature (with a minimum of corrections) on the Sun for a long period, say 2-3 hours. Because the solar day is 24 hours, and the sidereal day is 23h56m4s approx, you need to slow the tracking rate down approx 0.3%. On a Losmandy/Gemini and others you simply select the Solar tracking rate. On a Meade Autostar you custom change the tracking rate by -3.

What do you do with a Vixen Sphinx / Starbook driven system?

Glenn






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