THE GROVE CREEK OBSERVATORY
Trunkey Creek, NSW, Australia
Click for full size image
ASA Australian Standards Designated Optical Observatory: DO3-14
International Astronomical Union Minor Planet Centre Designated Observatory:  E16
Latitude 33° 49' 46.8'' South.  Longitude 149° 21' 59.7'' East. (Decimal = Lat: -33.829667 Long: 149.366583)
Time Zone:+10 UT
 Altitude: 935 meters (Geometric: 959m)

Magnetic Declination: 12° 0' East (positive)

INTRODUCTION:

The Grove Creek Observatory is a non-profit professional research facility, providing remote internet controlled telescopes. All staff are volunteers, who give their time for free. The facility allows research scientists, universities, amateur and professional astronomers to take CCD images and conduct research through our telescopes, via the internet from anywhere in the world.

Our mission is to share the wonders of the Southern Skies to the world-wide astronomical community.

The facility is famous for being located in one of the best night sky locations in the southern hemisphere, well away from any city lights, with a limiting visual magnitude of 7.37 and a new moon background sky magnitude of 22 (+/-0.5) . It is located 255kms by road (170kms direct), due west of Sydney, on the western edge of the Blue Mountains and the Great Dividing Range, in the Central Tablelands of New South Wales, Australia. The nearest city is Bathurst (pop. 39,000) - located 59kms north/east. The closest village is Trunkey Creek (pop. 50), located 4kms west and hidden in a deep valley with protected street lights that can not be detected from the observatory.

WARNING - NO PUBLIC ACCESS
   As we need to provide our coordinates for astronomical purposes on this web site,    
please under no circumstances attempt entry to the property without permission.
The Observatory is not open to the general public and is on private property.

Headlights or road dust could destroy hours of valuable data and will trip alarms.
(As well as disturb the astronomers that need to sleep during the day!)

   The facility is fenced off with a locked gate, extensive alarm systems,    
CCTV 24hour surveillance and an armed guard, who lives north of the facility.
Trunkey Creek Police regularly patrol the area - Trespassers will be prosecuted.

We regret being so blunt but people have previously used in-car GPS units to locate the
facility, if only out of curiosity, ignoring the clearly posted NO ENTRY signs at the main gate.
 


Area Map

Grove Creek comprises of three separate observatory buildings:
(Click on the below links for building details)

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Main Dome Building   *              Currently used for on-site, local observations and imaging.

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Middle Internet Observatory    Housing our remote controlled Celestron C-14 Internet Telescope (SSO Network).

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Western Internet Observatory Currently provided to Wheaton College in the USA for their remote telescope.

* Although our 3.2m (10 ft) dome and solar powered shutters are fully motorised, the main dome does not automatically track
  with the telescope automatically. It will be upgraded, when/if it is required for another remote internet telescope facility.

HISTORY:

The Grove Creek Observatory was established in 1985 primarily for conducting public tours of the arrival of Comet Halley. The extensive sheep and grazing property surrounding the site where the observatory now stands, was then owned by the Lynch family. Jim Lynch the eldest son, (pictured below) already had a small private domed observatory located 2 kms south of the current facility, housing a 12.5" Dall-Kirkham designed telescope that he had been using since 1975. Jim and his two younger brothers, Tom and Mark Lynch decided that the current observatory was too small and had difficult access, to provide tours for the soon to arrive Halley's comet and decided to build a new facility, 100 metres off Grove Creek Road, on the highest hill of the property.


Jim Lynch (with a friend), Director and Founder of the Grove Creek Observatory.

The 10ft dome and C-14 telescope were purchased from Mr. Lionel Larson and shipped to "The Grove" from Bilpin, NSW. As the hundreds of bookings for Halleys Comet poured in, it soon became clear that one telescope was not going to be insufficient. A sliding roof type observatory was built, 20 meters west of the main domed building. Jim's 12.5" Dall-Kirkham telescope (now modified to a f/4 Newtonian and moved to Coffs Harbour) was moved to the main central pier of the new "Western Observatory" and the original observatory abandoned. At the peak of operation during Halley's Comet,  there were also two de-mountable buildings, serving refreshments. Over two thousand people saw the comet from Grove Creek, during the 1985/86 visit.

Visitors often commented on the beautiful views from Grove Creek as staggering views of the famous Australian Blue Mountains can be seen, as follows:

Eastern view

Southern view

Double rainbow taken from the visitor's room

 Sunrise over the Blue Mountains

After this time, the future of the facility was unclear. In  February 1987 an astronomer from Sydney, Steven Williams (pictured below) was asked to improve the electronics of the C14 and to hold a tour. Funny enough, the tour consisted of a group of low-security prison inmates, who were on a field trip! Steven was invited to conduct tours of the facility on a commercial basis, however, Grove Creek really only consisted of the current "control room" seating up to 40 people (at a tight squeeze) the main dome and two outside toilets. At that time, there was no on-site accommodation facilities available and it became problematic for Steven to continue to run tours. Steven decided to depart Grove Creek in 1989 to work full-time at the John Tebbutts Observatory in Windsor, NSW and also at the Yullara Observatory at Uluru (Ayres Rock) in Central Australia. He also went overseas to the United States and England, to complete his astronomical studies.


 Steven Williams - The Managing Astronomer of the Grove Creek Observatory.

It was during this time, that the Lynch family left "The Grove" property and soon after the patron of the family, Jim Lynch Snr, passed away. In 1995 Jim Lynch (Jnr) decided to extend the main domed observatory building to include full accommodation, so that tourists could stay on site after using the telescopes. These extensions were built by both Jim and Alan Jones. Upon Steven Williams' return to Australia, he was requested to return to the facility as a volunteer - where all monies received from these tours went towards maintaining and upgrading the facility with new astronomical equipment.

It was a pleasant omen that this second phase of operations of the Grove Creek Observatory also started under another comet, Comet Hhyakataki, which was about five times brighter than Halleys. Tom Polakis from the USA was the very first paid visitor to stay at new accommodation facility on March the 21st, 1995. Jim Lynch then moved to Coffs Harbour in NSW in 2001 and Steven Williams has operated the facility, since that time. In 2003 the final remaining grazing area surrounding the observatory was sold off from the family's estate and the 1ha (4acres) observatory property was retained and fenced off. Hundreds of people visited and stayed at Grove Creek from 1995 to 2007. Astronomical pictures taken by these visitors have been published in many international astronomical magazines and astronomy books. The facility has often been used by the Australian and International media for live coverage of astronomical events. Grove Creek is listed in a popular book, "101 things to do before you die" and was a unique eco-tourist destination for people from all over the world. A huge influx of tours came during the closest approach to Mars in July 2003 after the "Sydney Weekender" program aired a special TV presentation about Grove Creek.

However, in May 2007 it became clear that Grove Creek Observatory would be better utilised as a fully remote controlled internet research facility and it was decided to close to the general public altogether. When Grove Creek was first built, it was the only observatory running public viewing tours under very dark skies in the area. Recent to this period, there were other observatories built to cater for the general public. Steven's decline in health and mobility was also a factor in this decision. However, the positive side of closing public tours now enables Grove Creek to provide 100% of telescope time to remote internet telescope projects, where the general public, students, amateur and professional astronomers from all over the world can use the facility remotely, with no need to attend the facility personally. This now allows greater access to Grove Creek than tours ever did!

THE STAFF ACCOMMODATION

At the rear of the main control room / domed observatory, is our comfortable accommodation facility. This provides a retreat for staff and invited visiting astronomers to maintain and use our internet remote controlled telescopes. We have a lounge area with digital TV, entertainment system, gas heating, dining table, kitchen, bathroom with flush toilet and a hot full pressure shower. No "roughing it" at Grove Creek! The kitchen area has a fridge/freezer, two microwave ovens, fan forced convection oven, filter & espresso coffee machines and a small gas oven with two hot plates and griller. All cooking utensils are available. Pure, filtered mountain rainwater is on tap from our 20,000 litre storage tank.

Lounge and Kitchen area, volunteer's bunkroom and manager's bedroom (bottom/right image).

Only "NextG" or "3G" mobile ("cell") capable phones will work in the area.

The landline at Grove Creek can be unreliable at times - As an emergency backup,  we have a powerful 2-Way
UHF CB radio with over 80kms range and access to a local repeater on channel 2 (use "duplex" function)

Mr. Geoff Gilbert (pictured below-right) and his family, purchased much of "The Grove" and lives 460 metres north of the facility. The Gilbert's are graziers who run sheep and cattle on the property and assisted us with computer and telescope resets for the internet telescopes, as well as providing us security. In April 2004, Greg Ford (pictured below-left) joined as a volunteer at Grove Creek and assists with repairs and maintenance.

Greg Ford
Assistant

Geoff Gilbert
Our Local Farmer

THE MIDDLE REMOTE CONTROLLED OBSERVATORY:
 
Fully computerised sliding roof type observatory, measuring
7.08m long x 4.65m wide x 2.4m high (229cm clearance floor - ceiling)

Completed In December 2007, the "Middle Observatory" was upgraded for remote internet use, using advanced roof motors, sensors and relay control systems. It now houses our famous C14, which is online for remote internet use for professional and amateur astronomers, students and the general public. Click here for further details.

THE WESTERN REMOTE CONTROLLED OBSERVATORY:

Fully computerised sliding roof type observatory, measuring 5.6m x 4.6m (217cm clearance floor to ceiling)

Built in late 1995 and motorised for remote internet use June 2004, this remote controlled sliding-roof observatory is currently provided to Prof. Tim Barker and Andrew Mattingly, for a remote internet telescope operation we call the "Wheaton Telescope". Click here for further details.

Shutters, Western and Middle Observatory motors by:

Brett Soames - Kelso, NSW

WEATHER & SKY CONDITIONS:

Grove Creek is considered one of the best observing locations in Australia. No matter what the size of any given telescope, a dark sky is essential for visual observations. The facility is situated on the highest point of a sheep and cattle grazing property, well away from any light pollution with a 360° view of the night sky. The nearest village, Trunkey Creek, is located 4kms south/west from the observatory and hidden within a deep valley. With a population of only 60 people and protected street lighting, no lights can be seen from the village. That makes Grove Creek Observatory one of the best dark sky locations available and therefore considered the premier site for seeing faint interesting objects and taking CCD images of the southern night sky.

On a yearly average, Grove Creek looses only 1 night in 4 to total cloud cover (compared to Siding Spring, the largest observatory in Australia, which losses 1 night in 3). Some months are better than others - December and January should be avoided, if possible, as the nights are very short and electrical and rain storms after sunset are common. August is known for higher winds. High winds can restrict viewing, CCD imaging and astrophotography due to vibration and risk of optical damage to the telescopes. For astrophotography and CCD imaging, a wind speed less than 16kms/hour (9 knots) is desirable. Our remote Observatories roofs close at >24kms/h (13 knots) wind gust.

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We have been in severe drought since we started taking weather readings in July 2004 via our live Weather Station. The average annual rainfall for Trunkey Creek is only 850mm - bad enough but from 2005-2010, the annual average rainfall has fallen to only 478mm, good for the Observatory but bad news for local farmers. The driest year was 2006 with only 334mm and the wettest year was 2007 with 574mm. There is no conclusive data for what are the driest and wettest months at Grove Creek as yet, with our 6 year weather station history records.

For invited visiting astronomers, ensure you bring adequate alpine winter clothing for night time viewing, during April to October. Despite popular belief, it does snow in Australia but at our altitude of 935 metres (3,067 ft), we usually only have about 6 days of snow per year. Since we have been keeping records, the lowest recorded temperature was -3.3C (38F) on the 17th of July, 2007 and the highest was 44.8C (113F) on the 7th of February, 2009 - the day of the terrible "Black Saturday" bush fires that destroyed hundreds of homes in Victoria and the hottest day recorded since 1912. However, these are very rare extremes. The monthly average temperature in January is 15.5C (60F) to 30.6C (88F) and in July, 0.6C (33F) to 7.1C (45F). Please see our Online Weather Station for more details. Both the control room and our accommodation areas are well insulated, have gas heating and the visitor's quarters bedding are "alpine" rated.


One of the amazing sunsets over the Middle and Western Observatory buildings

On the western side of the Great Dividing Range, helps protect the area against turbulent air, thus making the "seeing conditions" excellent. The ground level pressure at our altitude helps also. From 1988 onwards, very faint light from Sydney (which is 170kms exactly due east) was starting to become visible and now extends to about 6° in the eastern sky as well as very faint lights showing from Bathurst, 49kms to our north-east, which is of little concern. Bathurst Shire Council have put in place new regulations to stop this increased pollution, which badly effect 3 other observatory sites closer to Bathurst. Grove Creek currently remains unaffected.

As you can see by the below long exposure photograph taken in 2000, the light pollution from Sydney was actually dimmer than the brightness of the Zodiac Light (as of 2009, it is now about the same brightness). The Zodiac Light are particles left over from the formation of the solar system, being reflected by the sun and are often very difficult to capture. The below astrophotograph was taken low in the east, to prove the point. For the more technically minded, the visual limiting magnitude at Grove Creek is an amazing 7.37. This has been independently measured from the star SA0 231240 - located in the constellation of Grus. The background sky (with no moon) measures at 23 magnitude. The total yearly average seeing is 1.38^secs but during March-June and September-November, this can improve to approx. 0.98^secs. Obtrusive outside lighting within a 6km radius of the observatory is now restricted by council regulations, which can carry fines. We are very grateful to the residents of Trunkey Creek Village and the majority of the property owners in the area, that appreciate the importance of the Observatory and keep all outside lights off at night.


1 minute astrophotograph showing the Eastern Zodiacal light in comparison to the
faint light pollution from Sydney (about 10
° above horizon, where the wall limit in the
east of the remote observatories are
20° - so it couldn't effect the telescopes anyway!


Grove Creek Observatory is a registered Optical Observatory
under official
Australian Standards (Designation: D03 - 14)
Obtrusive lighting is not permitted in the area.

Why is the observatory called "Grove Creek?"
 

Grove Creek itself - 4kms down the road from the Observatory.
The observatory is located on the highest elevation point of "The Grove" property and is 4kms west of the actual Grove Creek.
This creek is very well known - flowing through the huge arch at Abercrombie Caves, over Grove Creek Falls and into the Abercrombie River.


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