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/ Sphinx mount support for non s...
Sphinx mount support for non sidereal tracking
July 18, 2009 2:31 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.
July 18, 2009 7:14 PM
I don't recall seeing anything in the starbook about different tracking rates.
July 19, 2009 2:22 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.
Eric --------------------- WO 80mm 10th Anniversary TSA120 PST EM-200 T2 QSI683WSG Canon 500D, full spectrum mod Gary Honis--for sale soon
Debate religion/politics at
July 19, 2009 5:46 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.
SkyWatcher 120ED PRO plus dedicated Flattener, SW 190MN , WO 72ED & 66ED Vixen Sphinx with starbook, Atlux with Nexatlux QHY5 finder guider, Modded Canon 1000D, Atik 383L+ Mono and filters Don't you wish there were a knob on the TV to turn up the intelligence? There's one marked 'Brightness,' but it doesn't work." TV is called a "medium" because it is neither rare nor well done.
July 19, 2009 7:11 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.
17.5" f/5 Dob. IM-715 MCT. 120ED. Lunt 60mm Ha. Zeiss, Leica, Fujinon, Nikon, Pentax, Bushnell bins
July 21, 2009 5:20 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?
/ Sphinx mount support for non s...
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