iTelescope.Net is the world’s premier network of Internet connected telescopes, allowing members to take astronomical images of the night sky for the purposes of education, scientific research and astrophotography. (more)

iTelescope.Net is a self-funding, not for profit membership organisation; we exist to benefit our members and the astronomy community. Financial proceeds fund the expansion and growth of the network. iTelescope.Net is run by astronomers for astronomers.

The network is open to the public; anyone can join and become a member including students, amateurs and even professional astronomers.

With 20 telescopes, and observatories located in New Mexico, Australia and Spain, observers are able to follow the night sky around the globe 24x7.

iTelescope.Net puts professional telescopes within the reach of all, with systems ranging from single shot colour telescopes to 700mm (27”) research grade telescopes.

Astronomy Research

Having access to professional telescopes means that doing real science has never been easier – great value for schools, educators, universities, amateur and professional astronomers. (more)

Exo-planets, comets, supernova, quasars, asteroids, binary stars, minor planets, near earth objects and variable stars can all be studied. iTelescope.Net can also send your data directly to AAVSO VPhot server for real-time online photometric analysis.

iTelescope.Net allows you to respond quickly to real-time astronomical phenomena such as supernova and outbursts events, gaining a competitive edge for discoveries. With more than 240 asteroid discoveries iTelescope.Net is ranked within the top 50 observatories in the world by the Minor Planet Center.

Get involved: members have used the network to provide supportive data for go/no-go decisions on Hubble space telescope missions.

Education and Astronomy Schools

With science and numeracy at the forefront of the education revolution, iTelescope.Net provides the tools, along with research and education grants, to support the development of astronomy or science based curriculums in schools. Contact iTelescope.Net about a grant for your school or research project. (more)

Professional observatories use iTelescope.Net to supplement current research projects. The network provides alternate observatory sites in both southern and northern hemispheres and is a good way to continue research when seasonal poor weather hits your observatory.

Sky Tours Live Streams

We offer a variety of ways to view the night sky, including our entry level Sky Tours Live Streams. These weekly streams, hosted by Dr. Christian Sasse, are a great way to get started with Remote Astronomy, allowing you to see our telescopes in action and learn about the Night Sky from a professional Astronomer.


Take stunning images of the night sky, galaxies, comets and nebula. Have access to the best equipment from the comfort of your computer and without the huge financial and time commitments. (more)

The network has everything from beginner telescopes with single shot colour CCDs to large format CCDs with Ha, SII and OII and LRGB filter sets. Check out the member image gallery – the results speak for themselves.

Depending on your own image processing skills, you can even land yourself a NASA APOD.


All you need is a web browser and an Internet connection; iTelescope.Net takes care of the rest. Our web-based launchpad application provides the real-time status of each telescope on the network as well as a host of other information such as a day-night map, observatory all-sky cameras and weather details. (more)

From the launchpad you can login to any available telescope, and once connected, you’re in command. Watch in real time as the telescope slews, focuses and images your target.

The image files (in FITS format) are then transmitted to a high-speed server ready for your download. All image data taken is your data – iTelescope.Net doesn’t hold any intellectual property rights.

Reserve and schedule observing plans in advance, even have them run while you are away from iTelescope.Net and have the image data waiting for you ready for download.

New and Starting Out?

A number of telescopes are fitted with colour cameras; these systems have been designed for ease of use. It’s as simple as selecting an astronomical target from the menu, watching the telescope image your target, and have the resulting image sent to your email address as a jpeg attachment. (more)

The image file is also sent to our high-speed server and can be downloaded in its raw image format, for post image processing if you want more of a challenge.

Already a Pro?

iTelescope.Net offers a large range of telescopes, fields of view and image scales, and NABG and ABG CCD camera combinations. Select from a large range of filters including narrowband, LRGB and UBVRI, as well as control pointing, filter selection, focusing, exposure times, image counts, repeat loops etc. All data is offered in its raw FITS format calibrated and non-calibrated.

Support and Service

With remote astronomy observing plans can be interrupted from time to time, by clouds, wind gusts and even a rare equipment failure.

iTelescope.Net has you fully covered with our satisfaction guarantee; we will return your points if you are unsatisfied with your results. Help is just a click away. (more)

A dedicated team of professionals are working around the clock to keep the network operating. This includes local ground crews at each observatory, sophisticated monitoring systems and remote observatory administrators monitoring the quality of data coming off the network.

Our dedicated support website allows members to seek answers to frequently asked questions. Formal support can be requested by lodging a support ticket, which can be viewed, tracked and managed through to completion. Go to or simply email

Our contact details are also available. You can phone or Skype us if you want to speak to a person directly; you can also contact us via Skype instant message, email and fax.

How much does this cost?

Rates vary based on your membership plan and the phase of the moon. Rates start as low as 17 to 100+ points per imaging hour, which is billed per minute of imaging time used; typically one point equals $1. Make sure you are subscribed to our newsletter for special offers. Please visit our pricing page for more information on telescope operating rates. (more)

Each telescope has its imaging hourly rate displayed in real time in the launchpad before you login. At the end of each session you are also sent a detailed usage receipt which includes the costs, weather data, preview jpeg images and your observing session log file.

Membership Plans

We have a range of plans catering for everyone from the amateur to the professional astronomer. Each plan provides unrestricted access to each telescope and includes the plan’s dollar value in points, which is credited to your account each time the membership renews. (more)

Membership plans set the usage rates for each telescope on the network, expressed in points per operating hour. The entry level plans provide maximum flexibility on our single shot colour systems, and the heavy usage plans focus more on the large research grade systems. Memberships start from $19.95 and range to $999.95 per 28 day period.

Additional points can be purchased at any time to supplement your account balance.

Hosting and Affiliates

iTelescope.Net offers a range of telescope hosting solutions to members with special projects, allowing you to host your own telescope at three of our four observatory locations. Conditions and approvals apply. Contact us for more information.(more)

Affiliate membership allows you to connect your own telescope to iTelescope.Net with reasonable rates of return. Limited availability exists and is subject to telescope network balance.

Please contact us for more information.

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Catching Asteroid 2005 YU55

UPDATED Section on generating topocentric ephemeris (06/11/11)

left - Path of Asteroid 2005 YU55 as seen from Mayhill NM on the evening of November the 8th at the start of astronomical twilight. Position ticks are every 15 minutes, click to embiggen.

The 400 meter wide asteroid 2005 YU55 will pass within 0.85 Lunar Distance (0.0022 AU) of Earth on the evening of November 8-9, being closest at November 8, 23:39 UT. Imaging this asteroid will be a significant challenge, it will be moving around 8" a second near closest approach and 9" a second at closest approach. Furthermore, with the Moon nearly Full, and the asteroid heading towards it, conditions are not favorable.

Only the New Mexico Scopes have a chance of seeing the asteroid, for Spain and Australia the asteroid is below the telescopes limit of travel. From New Mexico, the asteroid is visible high in the sky from astronomical twilight on. You won't see it at closest approach, that occurs in the late afternoon/twilight, but just after when the asteroid is still moving  at a fair clip.

left - High power view showing the fields of view of GRAS-14 (large rectangle) and GRAS-05 (small rectangle). The tick marks are 2 minute apart. The track is the geocentric position, which is somewhat removed from the Topocentric position, the circle shows the predicted view from Mayhill from the MPEC (click to embiggen, but use a proper topocentric ephemeris or the GRAS comet/NEA dialog, rather than this chart, for indicative purposes only).

Choosing an imaging instrument is a tradeoff; GRAS-14 is nice wide-field instrument that performs well under Moonlight, but you can't drive it faster than sidereal rate, and the blur that is YU55 may be too faint to show up. GRAS-20 is also wide-field, although narrower than GRAS-14.

GRAS-04 and GRAS-05 can be driven fast enough to track the asteroid in tracking mode, but positional uncertainties may mean the tracking might be a bit off (and trailing bright stars may override the asteroids position). Yes, I know there are other instruments, but this gives an idea of the considerations you have to juggle.

As the asteroid is quite close to Earth, there will be a significant parallax error between geocentric ephemeris and the position as seen from Mayhill, use a proper topometric ephemeris instead (eg using the MPEC ephemeris generator, if you enter the observatory code for Mayhill - H06,  into the box in the ephemeris generator, make sure the Epoch is set to November 8, 2001 and it will create a topocentric ephemeris for Mayhill).

If you take this approach, remember that it takes time for the GRAS scopes to get to tracking position. GRAS-14 can take up to 5 minutes (depending on there being reliable stars in the field for tracking), so offset you inital position by around 4 minutes or so (this will be a significant distance) so the asteroid will be in field. I used this technique to image 2011 MN in GRAS-12, which was moving at about 10" per second (but not in strong Moonlight though).

Or better yet, use the one line MPEC elements and the comet/NEA option for the GRAS scopes (for the GRAS-05/04 instruments, you can choose the track option so the instrument will track the asteroid).

While this is challenging, GRAS users have captured rapidly moving faint asteroids before, 2010 TD4 and2011 MD although without the Moonlight.

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