Welcome to the Barden Ridge Observatory Home Page
Barden Ridge observatory (BRO) located around 30km to the south of the Sydney central business district.
The observatory is privately owned, sorry, no tours.
The nearest public observatory is located at
Green Point which is operated by the Sutherland Astronomical Society
BRO sits at the top of the Woronora River valley, with the Royal National Park to the east.
Holsworthy Reserve and Heathcote National parks to the south.
Royal Greenwich Observatory
Astronomy Photogapher of the Year 2023
"Our Sun" Category- Runner up.
Taken in Barden Ridge, New South Wales, Australia, 4 January 2023
"When viewed through an extremely narrowband-pass filter centred H-alpha light, our Sun will reveal
fleeting magnetic field lines, filaments, flares, spicules and prominences that can change over a matter of minutes,
Massive prominences that extend to beyond the radius of the Sun do appear occasionally, but even ‘normal-sized’ events that can appear relatively
small compared to the solar disc are vast structures. This image was processed using an inverted polar to rectangular transformation
to better showcase the scale and structure of these often-impressive eruptions around the Sun’s periphery.
This transformation turns the Sun ‘inside-out’ and in doing so highlights prominence activity around the edge of our nearest star."
Equipment used: Astro-Physics 130GTX telescope, Coronado 90 mm lens, Paramount PMEII mount,
QHY533M camera, 1170 mm f/9, best 4% used of 2,000 x 1/20-second exposures (4 seconds total exposure)
This same data set, but with traditional processing was also the
NASA Astronomy picture Day on January 14th 2023.
Inside the Observatory
The dome is a Sirius 2.3 metre "home-model" fibreglass dome. It is around 30 years old now, having withstood numerous Sydney thunderstorms, downpours and hail with ease. Apart from the occasional "cut and polish" using automotive cleaners, the observatory has required little maintenance. It is fully robotic, with both shutter and dome rotation being controllable via a Cat-5 network cable running to the house. The system is also accessible via the internet.
You can view a selection from the gallery of images here
Above the Woronora River valley, this image shows Barden Ridge looking south. The distant buildings at top centre of the frame are Australia's only Nuclear Science and Technolgy facility (ANSTO) .
The main telescope is an Alluna Optics 16" Ritchey-Chretien. An Astro-Physics GTX F6.3 is used for Solar Imaging Also used are an AP155 F7 refractor and AP305mm Riccardi Honders Astrograph The mount is a Paramount MEII. The mount is attached to a 10" diameter, powder-coated steel pier, dyna-bolted to a concrete and brick column below the observatory deck. Weather monitoring is carried out by a Boltwood Mark II weather sensor. It measures mean wind speed, humidity, cloud cover, ambient light and detects rainfall...plus the occasional arachnid that wanders under the lower sensor, thus closing the dome !
Things that make the observatory work better
1: AllSky webcam Sometimes the Boltwood monitor misses high/thin cloud.
This camera uses a Point Grey Cricket IP camera and uploads images to the Web every 3 minutes The all-weather housing is made from some PVC plumbing parts, duct tape, and an acrylic dome from a RC drone,
Ugly but functional !
Things that make the dome work better 2: Delonghi de-humidifier, on a self timer that activates just before dawn. The clear plastic tube drains to underneath the observatory deck. The carpeted floor has saved many an eyepiece and instrument from certain destruction.
The image above is typical of the imaging performance the RH305mm telescope. This deep image of the Horse Head nebula was taken over many nights, partly due to the very dim nature of the dust cloud, but mainly due the massive amount of sky glow from the Sydney urban sprawl.
Things that make the observatory better 3: NPort USB to RS232 hub. Essential for controlling the dome, filter-wheels etc. The business end of the telescopes. The RC16 is fitted with a Telescope Control Centre which controls and monitors:
The Precision Instrument Rotator (PIR) can rotate the CCD camera to a repeatable 0.1 of a degree for guide star acquisition. The 16 Megapixel SBIG STX16803 uses 65mm square filters.
- Absolute focus,
- fan speed,
- ambient, primary and secondary temperatures.
- secondary dew heater
- Instrument rotator
A second 6.0 megapixel Point Grey CCD is used for solar images. Looking a bit like Frankenstein's monster the camera is cooler via two PC CPU heatsinks and fans coupled to 2x 60 watt peltier coolers. As a result the camera typically reports an operating temperature of around 24 degrees....a vast improvement over its normal 40 degree operating temperature! The camera is also used with a SBIG CFW10 filter-wheel fitted with Custom Scientific SII, H-Alpha (3nm and 10nm) OIII filters plus Astro-Don RGB imaging filters for occasional planetary imaging sessions. Above: The transit of Venus...required a field trip! Below: The great nebula in Carina
Above: The Ara nebula in narrow band. Below: Sun in H-Alpha
Below: Sydney's Summer thunderstorms. Surge protectors on expensive observatory equipment is mandatory! Below: Total solar eclipse taken a few miles north east of the observatory... :)..... Wyoming USA Some QuickTime VR movies, imaged near Mudgee NSW can be found at the links below Southern Star trails (right) and associated web page The Southern Milky way (Windows users will need to install an Apple Quicktime player for their browsers to view these)
My astrophotography "discoveries/innovations"
Digital Measurement of Periodic Error
In late 1997 I was helping test precision worm gears for Scott Losmandy (owner and founder of Hollywood General Machining) for the G-11 equatorial mount usng my SBIG ST4 autoguider.
I mentioned in passing that I used the ST4 autoguider to measure
the periodic error of the gears to one of SBIG's lead engineers, Dr Alan Holmes. "How are you doing that?" he asked. He was puzzled as the system was designed to correct tracking errors, hence there shouldn't be anything useful to measure!
My solution was simple: disable the guder's corrections, and simply plot the guide star's positions from a starting datum.
SBIG's CCDOPS software allowed generation of a "track-log" file so the guide star data which could be easily exported to and graphed in a spreadsheet..
He said he was constantly amazed by applications for their products that users came up with and this was one of them.
The measuring periodic error was a function subsequently added to the "new" STV autoguider that superceded the venerable ST4 autoguider in the year 2000.Milkyway Arch panoramas
(Below "Space is curved" CWAS David Malin innovation prize winning image 2007)
In 2006 I was wanting to create a 360 degree panorama image of star trails in the night sky,
but did not have the multiple cameras or software necessary to stitch the multiple time exposures
that would be required for such an image.
My "eureka moment" was realising I could do this with a single camera,
fitted with a180 degree circular fisheye lens and a new "re-mapping" feature in Photoshop CS.
The Photoshop tool allowed the conversion of images from polar to retangular co-ordinates
I then took a sequence of time exposures over a period of several hours with the fisheye lens pointed at the zenith, stacked them show the star trails, and converted the circular fisheye image (i.e. polar) to a rectangular one.
The image's horizontal aspect was then elongated by Pi x number of horizontal pixels, and I had my 360 panorama. I also applied the same technique to a single frame, and the proverbial night sky "Milky Way arch" was created.
Ultra wide panoramas of the Milky Way since been replicated and improved upon many times since,
Contemporary imagers now use panoramic heads and automatic stitching-software that no longer geometrically distorts the star shapes.
However it all started with the above image taken in 2006 at Mudgee Observatory in NSW, Australia..
Plus a few other Glittering prizes picked up along the way.......Unfortunately growing light pollution to the north and west is slowly making night time astrophotography more difficult from the observatory.
Despite that, I've received a few national and international awards for my Astrophotography work:
First Prize, Royal Greenwich Observatory
Astronomy Photographer of the year 2020 (stars and nebulae)
Discovered by John Frederick William Herschel on 16 March 1834 is the 3576th entry in is New General Catalog: unsurprisingly labeled NGC3576
A computer software routine has removed the stars from the original image, leaving behind just the nebula structure.
Shades of grey in the original data have been mapped to a palette sampled from press imagery of
Australia's devastating fires of 2019/2020 during which time the Observatory was often heavily shrouded by bushfire smoke.
Some of my Astrophotography awards and publications
CWAS David Malin Astrophotography Awards
Judged by Dr David Malin OAM.
Dr Malin pioneered many astrophotographic techniques at the Anglo-Australian Observatory
His colour imagery using the AAO and UK Schmidt telescopes is world renowned
CWAS/Malin awards are Australia's premiere Astrophotographic event.
The awards were generously sponsored by Canon Australia and the CSIRO for many years.
Apart from the overall prize, successful entrants are given category wins or honorable mentions
(hightly commeded entries were also given kudos, but no sponsor prizes were given to the recipients)
I have received around 20 highly commended images which due to poor record keeping on my part have not been included below.
The NewsCorp Photo editor's prize was added from 2012.
The inaugrual Year was 2004. I was a co- judge with one of Australia's finest amateur Astrophotographers Mr Steven Quirk.
As "vetting" judges we clearly could not enter the competition. Not many entries were recieved (about 30), David Malin subsequently made all judging decisions in 2004 and following years.
With the generous sponsorship of Canon Australia, the entry pool grew to over 500 entrants. The subsequent Malin Award exhibitions have been attended by a total of over 2 million visitors, making it the largest photographic exhibition of any kind in Australia.
I subsequently have acted as the judge for the Royal Astronomical Society of New Zealand Astrophotography competition in 2016.
*The CWAS comittee created a "semi-professional" category from 2005 to 2009 which probibited entrants who derived any income from astronomy/photography interests from entering other competition categories.
The David Malin Innovation Prize is rarely and only awarded at Dr Malin's discretion,
"for a striking astronomical image that shows exceptional imagination, innovation or an unusual approach in any of the categories"
*2005 Winner Semi-professional category (Wide field image)
*2006 Winner Semi-professional category Solar System +OVERALL WINNER + Honorable mentions x3
*2007 Winner Semi-professional category (Nightscape image) + Winner Innovation Prize + Honorable mentions x2
*2008 Winner Semi-professional category (Deep sky image) + Honorable mentions x2
*2009 Honorable mentions x2
2010 Winner Innovation Prize x2 + Honorable mentions x2
2011 Winner Solar System + Honorable mentions x3
2012 Winner Solar System + 1 Honorable mention
2013 Honorable mentions x3
2014 Winner Scientific animation + Honorable mention x2
2015 Winner Solar System Winner Photo Editor Deep Sky
2016 Winner Deep Sky Honorable mention x4
2017 Winner Solar System Honorable mention x1
2018 Winner Deep Sky Honorable mention x4
2019 Winner Deep Sky + OVERALL WINNER +1x Honorable mention
2020 Winner Solar System
2021 Withdrew from the CWAS/Malins competition to take a place on the judging panel with Dr David Malin plus arguably, two of Australia's finest Astrophotographers, Phil Hart and Alex Cherney.
Sydney Observatory/The Powerhouse Museum
Winner Best Venus 2012 Transit image.
Australian Museum Eureka Prize 2012
Third place. Scientific Photography
Royal Greenwich Observatory Astronomy Photographer of the Year
Initially the competition was a modest affair starting in 2009 via submissions to a Flikr group
and attracted about 500 entrants from 30 countries.
It has expanded significantly and with Insight Investment as a sponsor
since 2016 the overall winner now receives a prize of £10,000
making it the richest astrophotographic contest in the world.
The 2020 competition saw 5400 entrants from 90 countries
The subsequent exhibition has been moved from the
Royal Greenwich Observatory into a dedicated space at
The National Maritime Museum and features massive back-lighted transparencies,
projections and interactive media.
2011 Highly Commended Our Sun
2012 Short listed
2015 Sortlisted x2
2018 Runner up. "Our Moon"
2020 Winner. Stars and Nebulae
2022 Shortlisted "Galaxies"
2023 Runner up. "Our Sun"
Sky & Telescope Beautiful Universe Competition
In order to attract, in their own words, "the most awesome and inspiring images".Winner / First prize The Sun
USA publishing icon, Sky & Telescope magazine
in 2007 invited contestants to submit their work for their
"Beautiful Universe" contest with prize incentives to supply images for their print publication.
Over 900 submissions were received from around the world.
While their annual publication of outstanding astrophotography goes on,
the contest unfortunately did not continue beyond 2007.
+ Second place The Sun
+ Winner People’s Choice The Sun
My images and the occasional interview have appeared in the publications listed below.
Sky&Telescope Magazine, Astronomy Magazine, Australian Sky & Telescope Magazine,
Southern Astronomy Magazine, Sky & Space Magazine, Cosmos Magazine,
BBC The Sky at Night Magazine, S&T Beautiful Universe,
Advanced Images Photography, PhotoCreator (Japan) ,
The Bulletin, QANTAS inflight magazine.
The Sydney Morning Herald
The Melbourne Age
The Daily Telegraph
The Parkes Champion Post.
Australian Geographic "International Year of Astronomy" Calendar 2009,
Astronomy Calendar 2010
Australian Sky Calendar 2012, Astronomy Calenday 2012 (cover)
Australian Geographic Calendar 2013 (cover)
Astronomy Calendar 2017
Astronomy Calendar 2018
Astronomy Calendar 2019 (cover)
NASA APOD printable calendar 2019
Astronomy Calendar 2020
Australian Geographic Calendar 2021
Sky at Night Calendar 2021
Astronomy Calendar 2023 (cover)
2018 Australian SkyGuide (Cover), The Physics of the Sun, Pathways to Astronomy (McGraw Hilll), Greenwich Astronomy Photographer of the Year (APOTY) Collins Collection 1, Greenwich APOTY Collins Collection 2, Greenwich APOTY Collins Collection 4, Greenwich APOTY Collins Collection 7, Greenwich APOTY Collins Collection 9. Pathways to Astronomy Fifth Edition (McGraw Hill). Royal Greenwich Astrotronomy Photographer of the Year Diary 2022 (Flame Tree publishing)
Awarded 9 NASA APOD's to date: 2007, 2010 x2, 2013,2016,2017,2018, 2021,2023
Other Web-pages featuring my images include: CSIRO, ABC NEWS, 9 NEWS, Daily Telegraph, Sydney Observatory, Perth Observatory, Royal Museums Greenwich Powerhouse Museum, The Australian, Australian Photography, Photo Review, DigitalRev, Science Illustrated, GC Magazine, CNN News, Mashable, Smithsonian Magazine, Australian Geographic....
ABC Television Channel 2
Channel 7 Television
Channel 9 Television (Millionaire Hotseat ! )
BBC four (UK)
CBS 4 Television (USA)
ABC Radio National (Australia)
Voyagers Ayers Rock Resort ran an extensive national Australian print media campaign
which included most major tabloids and the QANTAS inflight magazine in 2014 using my "Moonrise over Uluru" series.
The cropped image below was featured heavily in the campaign plus the uncropped original gained a NASA Astronomy Picture of The Day.