Pegasus NYX-88 Harmonic Mount

We’re excited to unveil the latest addition to our NYX harmonic mount series: the NYX-88, a compact mount designed to complement its larger sibling, the NYX-101.

The NYX-88, designed with travelers in mind, offers an impressive payload capacity of up to 14 kg (mount weighs 5 kg) without the need for counterweights. Engineered for precision and performance in astrophotography and observational astronomy, this mount ensures seamless and reliable operation.

Featuring strain wave drives on both the RA and DEC movements, the NYX-88 guarantees a backlash-free experience with high torque even at maximum payloads. Its fully CNC machined aluminum alloy 6061 body, anodized in black and blue, combines durability with aesthetics. Inside, you’ll find top-quality branded components, including stepper motors and strain wave gears, ensuring the mount’s long-term flawless performance.

The mount also includes an electronic brake on the RA axis to prevent backsliding when the power is off, as well as safety limit stops during slewing or tracking. Whether you’re exploring the night sky from your backyard or a remote location, the NYX-88 is the perfect companion for travelers seeking precision and reliability in their astronomical pursuits.

Lightweight & Powerful

Lightweight Design with Impressive payload capacity.

Aircraft-Grade Build, CNC-machined aluminum alloy AL6061.

Compact: Mount weighs just 5 kg.

High precision strain wave gears

Harmonic Gears on Both Axis ensure high payload capacity and a smooth backlash-free operation.

Combining a stepper motor and belt drive with sophisticated electronics, the RA axis achieves a remarkable 0.15 arcseconds of resolution, offering very low periodic error for ultra-smooth and stable tracking down to subarcsecond accuracy.

Supporting high imaging loads for its class

Counterweights are not required for payloads up to 14 Kg (31 lbs).

With a weight of 5 kg, the mount supports a payload of up to 14 kg, demonstrating a high load-to-weight ratio.

However, they can be installed for higher payloads by using a counterweight rod.

Equatorial or Altazimuth Mode

Versatile Mount: Use as German Equatorial or Altazimuth.

Switch Modes Easily: Via PC, Hand-Controller, or Mobile App.

Power Off Brake

RA Axis power-off brake ensures an instant safe stop during any power interruption.

Built-in Wireless & USB operation

Seamless Connectivity: Wireless and USB2 supported simultaneously.

Wide Compatibility: Works with ASCOM Alpaca, ASCOM, INDI, and LX200 protocols.

Additional Key Features

DC 12 Volts Battery Operation
The NYX-88 mount requires only 12V for smooth operation, allowing you to use a standard 12V battery without additional converters. The mount consumes less than 0.6 amps during tracking and up to 2 amps during slewing.

Universal Saddle Plate
The NYX-88 mount includes a low-profile and rigid universal saddle that accepts Vixen and Losmandy 3-inch dovetails.

Integrated ST-4 Autoguiding Port
An ST-4 port is available, compatible with our dedicated NYX hand controller or an ST-4 guiding camera.

Secure DC Output
An extra DC (GX-12) output on the side of the mount provides up to 8A to your equipment.

Reverse Voltage Polarity Safety
NYX mount has been designed with reverse voltage polarity protection. A saver if you accidentally reverse voltage or battery polarity during the night.

Optional Counterweights Support
The mount does not require counterweights for up to 14Kg of payloads. However, if you need to install counterweights for heavier payloads, there is a compatible M12 threaded shaft hole at the end of the DEC axis.

Auto Slew to Home
The automatic home position feature is implemented with encoders on both axes. Mount can automatically initialize to home position on request.

ASCOM, Alpaca & INDI
The mount fully supports ASCOM 7, ASCOM Alpaca and INDI framework. Sky-Safari is also supported allowing you to control the mount through your mobile device.

LX200 Compatibility
LX200 protocol is fully compatible with the NYX-88 mount. Any device that support LX200 such as Sky-Safari works out of the box with the mount.

Mobile Control
A mobile application for IOS and Android platforms allows you to control both axes of the mount, slew to installed catalogs of thousands of night sky targets and do a rough polar alignment through an electronic polar assistant.

Mount Position Saving
The mount saves its position every second and restores it upon boot.

Firmware Upgradable
An easy firmware upgrade process via USB cable or Air (Wi-Fi) allows you to stay up to date with bug fixes and the latest features of the mount.

Technical Specification
Material CNC machined 6061 aircraft aluminum alloy
Mount Mode Equatorial or Altazimuth
Mount Drive Strain Wave (Harmonic) Gear and Belt resulting reduction 400:1 (RA) and 300:1 (DEC)
Load Capacity 14 Kg without counterweights
20 Kg with counterweights
Weight 5.0 Kg
Safety / Power Off Brake On RA Axis
Dovetail Vixen and Losmandy 3-inch
RA Motor Resolution 0.15”
Max Slew 5 degs/sec
Power Voltage 12V DC unregulated
0.7A during tracking, 2Amps during slewing
Guide Port ST4
Counterweight Shaft M12 Shaft (1.75mm pitch)
Communication Wireless 802.11g and USB2
Operating Temperature -20° to + 50°C
Warranty 3 years
Made in (designed, assembled and tested) Greece. We carefully curate the entire manufacturing, testing and packing process.

Some items that are showing as in stock are in stock at our holding warehouses, not at the shop. To double check the stock levels at the shop, please contact us on 01909774369 or sales@rothervalleyoptics.co.uk.

The delivery times for most items is 1 - 2 days but again, please double check stock levels on important orders before placing an order via the website.

The delivery costs for courier next day are for mainland UK only. If you live in the Scottish Highlands/Islands, Channel Islands or Northern Ireland, then a shipping surchage will apply. please contact us for prices. Smaller items can still go 1st class via Royal Mail.

Please note that if you are wanting to take advantage of our Saturday and Sunday timed services or next day pre 12 or pre 10:30 services, you MUST check that the stock is here at the shop before placing orders. Also, orders using the Saturday and Sunday services must be placed before 1pm the previous working day. Also, please remember to check that the stock is here at the shop before placing orders. If the stock is not at the shop, we won't be able to ship on any of the timed services. 

Please note International customers will need to contact us for a shipping price prior to ordering via the website. We don't ship all items internationally. It is at our discretion what we ship outside of the UK. This all depends on the size and weight of the items. Please get in touch with us for any postage costs. Please note we do NOT ship telescopes or heavy items outside of the UK. This is due to massive postage costs and problems regarding returns.

If you have any questions regarding stock levels or delivery, please get in touch.

Zygo Interferometer Testing For ED Refractor Telescopes!

We are extremely pleased to announce our Zygo Interferometer is now installed and ready for use! Our experienced staff can test refractor lenses up to 120mm aperture and provide a comprehensive 2 page report showing the optical quality and Strehl ratio, plus much more information. We are using the very latest Zygo MX software to provide a more detailed report compared to other standard reports.

The interferometer is essentially a measuring instrument. Within the interferometer is a calibrated laser that is pointed through the optical test surface, then onto a high quality reference sphere, then back through the test subject then to an internal camera which gives us the measurement on the screen. From this, we can adjust the position of the test optic and the reference sphere to obtain a perfectly calibrated system. The more central the laser to the test optic and then on return, the better and more accurate reading and measurement we can take. This takes a lot of adjustment to get the best results from the optical surface. Once the measurement has been taken, we are provided with a series of results that show the optical quality of the surface plus other information. Continue reading for an explanation of the individual values and you can also see a test report that was done on one of our RVO Horizon 60 OTAs. 

We are offering certain telescopes with a Zygo test at an extra cost. Mainly ED doublets and triplets. All available telescopes with a Zygo test report are listed here. Just select Zygo Test Report from the drop down box at the top of the listing and we will test the optics in house and provide a full 2 page report with your scope. This will show you the optical quality of your telescope optics. We can also offer this service on your refractor telescope. Please get in touch for more details about this. 

At Rother Valley Optics, one thing we pride ourselves on is customer service and quality of our equipment. When we test your telescope, we will ensure that it is of the highest quality otherwise, we will reject the scope under our strict quality control and test another model for your peace of mind. One of the main values to look at when testing a refractor is the Strehl ratio. The higher this number, the higher quality lens you have. At Rother Valley Optics, we will guarantee the highest possible Strehl ratio for your telescope.  We will aim to provide 0.95 Strehl or higher on Takahashi, RVO Horizon, William Optics and many more! Generally, the higher the Strehl ratio, the lower the Astigmatism and Coma meaning a better image quality from your instrument. 

Other measurements such as the PV and RMS are important too. With these measurements, the lower the number the better as it shows less curvature on the lens. The flatter an optical lens, the better it will perform. The PV rating (Peak To Valley) is a measurement from the highest point (Peak) to the lowest point (Valley). From this we get the RMS (Root, Mean, Square). This is a similar figure to the PV and measured exactly the same way. The RMS is basically an average height difference from the PV so again, the lower the better. As you can see form the example below, we measured an RMS of just 0.027 wave which is a very good value.

We also measure the Power with our systems which is essentially the error from the reference sphere to the test optic. The reference sphere we use on our system is a very high quality sphere so the closer to zero the Power, the less error between the 2 elements thus ensuring a higher quality optical surface. 

You will also see some more values such as Astigmatism and Coma. Again, these are measured by the interferometer when we take measurements of the optical surface after adjustment. These are values which ideally would be at 0 but as our test optics are all curved lenses, there will always be astigmatism and coma present. The lower the number, the less of these aberations you will effectively see but with most refractors, you can buy field flatteners which will compensate for the coma anyway. The astigmatisms value is explaining the error between the symmetrical curvature of the lens. Basically, no lens will be perfectly symmetrical, the lower the astigmatism, the more symmetrical the lens surface is. 

Once the Zygo test report has been completed, the optical alignment is thoroughly tested and tuned to ensure they are spot on before they leave us. 

All available telescopes are on the website at the link below and ones we've tested already that are available straight away are also listed.

https://www.rothervalleyoptics.co.uk/zygo-tested-refractors.html

Here is an example of the test what we provide. This was a test on one of our Horizon 60 ED OTA's.

For any questions about this amazing new service, please either call 01909774369 or email sales@rothervalleyoptics.co.uk.

Are you interested in this product but would like to speak to someone with some more information? Simply fill in the form below and we will get back to you as soon as we can!

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