Starship Asterisk*

Partial Penumbral Eclipse (Aug 6th, 2009) http://www.perseus.gr/Astro-Eclipses-2009-08-06.htm Copyright: Anthony Ayiomamitis http://www.perseus.gr/Images/ecl-lun-2009-08-06-penumbral-shadow.jpg An analysis involving the partial penumbral eclipse on Aug 6th, 2009 involving the partial entry of the f...

Couldn't our photographer aimed the camera up just a little bit? I'm reminded of people who cut the heads off in their snapshots. The moon was around 60 degrees altitude when the image was taken. Now also add lots more degrees for the halo itself and you are basically shooting overhead. To add insu...

I've seen the 22 degree halo around the sun accompanied by "sun dogs" or mock suns that appear on the halo. The optics of our atmosphere can be pretty interesting! I have been after a halo around the Sun for some time and it has managed to elude me so far. Patience as usual! :) Anthony.

Couldn't our photographer aimed the camera up just a little bit? I'm reminded of people who cut the heads off in their snapshots. The moon was around 60 degrees altitude when the image was taken. Now also add lots more degrees for the halo itself and you are basically shooting overhead. To add insu...

NGC 6888 - Crescent Nebula / Dividing Cell Nebula / Van Gogh's Ear Nebula http://www.perseus.gr/Astro-DSO-NGC-6888.htm Copyright: Anthony Ayiomamitis http://www.perseus.gr/Images/dso-ngc-6888.jpg Hybrid result involving 11 hrs of total data comprised of H-alpha, O-III and LRGB using 2-, 6- and 20-m...

Siberian Delight http://www.perseus.gr/Astro-Eclipses-2008-08-01c.htm Copyright: Anthony Ayiomamitis http://www.perseus.gr/Images/ecl-sol-2008-08-01-corona-ls.jpg Siberian Delight II http://www.perseus.gr/Astro-Eclipses-2008-08-01d.htm Copyright: Anthony Ayiomamitis http://www.perseus.gr/Images/ecl...

Lunar Halo (Apogee Full Moon) with Jupiter http://www.perseus.gr/Astro-Lunar-Scenes-Halo-20121031.htm Copyright: Anthony Ayiomamitis http://www.perseus.gr/Images/lunar-scenic-halo-20121031.jpg Another sign and reminder that good old summer is long gone. The apogee moon at a distance of 404,977 km w...

Comet 260/P McNaught in Andromeda
http://www.perseus.gr/Astro-Comets-260P ... 121011.htm
Copyright: Anthony Ayiomamitis

Comet 186/P Hergenrother in Pegasus
http://www.perseus.gr/Astro-Comets-168P ... 121006.htm
Copyright: Anthony Ayiomamitis Please allow a moment for the animation to also load.

Sh2-173 The Phantom of the Opera Emission Nebula in Cas
http://www.perseus.gr/Astro-DSO-Nebulae-Sh2-173.htm
Copyright: Anthony Ayiomamitis

Collinder 399 - The Coat Hanger / Brocchi's Cluster http://www.perseus.gr Copyright: Anthony Ayiomamitis http://www.perseus.gr/Images/dso-cluster-cr-399-850pix.jpg Collinder 399 is one of the best known asterisms in the northern hemisphere summer sky. Although there is some ambiguity as to whether ...

Very fortunate to have experienced the complete transit in 2004 from start to finish and to have yet another opportunity to experience the 2012 event as well. For the latter, we were privy locally to the final two hours of the transit and which included a stunning sunrise with the transit already in...

Venus Transit 2004 - Ingress with Black-Drop Effect http://www.perseus.gr / http://www.perseus.gr/Astro-Planet-Ven-Tr2004-Ingress.htm Copyright: Anthony Ayiomamitis http://www.perseus.gr/Images/solar-system-ven-tr2004-ingress.jpg Venus Transit 2004 - Maximum http://www.perseus.gr / http://www.perse...

Super Full Moon Over Cape Sounion (2012)
http://www.perseus.gr
Copyright: Anthony Ayiomamitis

Post-Totality Over Athens, Greece (TLE 2011) http://www.perseus.gr Copyright: Anthony Ayiomamitis http://www.perseus.gr/Images/ecl-lun-2011-12-10.jpg The moon began its exit from the umbral shadow this evening approximately ten minutes prior to its first appearance over Athens. The image above was ...

Using differential photometry, I have a mean estimate for the magnitude of 13.290 (+/- 0.003) using GSC 3852:1108 (mag 11.7) and GSC 3852:1069 (mag 11.9) as comparison and check stars, respectively. According to AAVSO Alert Notice 446 , we have: Aug 26.1965 - mag 13.4 Aug 26.8747 - mag 13.118 Aug 2...

Credit: Anthony Ayiomamitis Source: http://www.perseus.gr/Astro-DSO-Supernovae-SN2011fe-20110826.htm http://www.perseus.gr/Images/dso-supernovae-sn2011fe-20110826.jpg Using differential photometry, I have a mean estimate for the magnitude of 13.290 (+/- 0.003) using GSC 3852:1108 (mag 11.7) and GSC ...

C/2009 P1 Garradd in Pegasus http://www.perseus.gr/Astro-Comets-2009-P1-Garradd-20110729.htm / http://www.perseus.gr/Astro-Comets-2009-P1-Garradd-20110729b.htm Copyright: Anthony Ayiomamitis http://www.perseus.gr/Images/comets-2009-p1-garradd-20110729-trails.jpg Click here for larger version. http:...

Not sure if some one has tried: A "single" exposure... Solved by using film (to much noise digitally). Fix the camera pointing in a direction, and only open the shutter for 1/365 of 24hours every day or 1/52 of 24hours once a week. It is only "exposing" 1 frame ;-) I would advis...

Owlice, The two cameras in your photo are fine as are any of the older cameras which did not have batteries for normal operation. I still have my Argus Cosina STL 1000 from the early 70's (my first camera :D ) and which cost me $125 at the time. Since its operation is totally mechanical with no batt...

Bystander, I am debating whether a SINGLE 24-hr exposure is physically possible. I can easily bypass the issue of a dead battery by using an older mechanical camera (I have a number of these). However, would the optics survive the extremity of the frigid temperatures for a period of 24 hours inside ...

My sincerest thanks to all of the NASA APOD readers who voted for "Selene Rising at Sounion"!

I'm wondering... has anyone achieved the same effect at lower latitudes by stitching together a year's worth of circumpolar photos, based on, for example, two hour exposures on the first of every month for a year? Sure beats spending a long day's night in Thule. One could even meet the "single...

I especially liked the series where the stars appear to be rotating backwards - I'm assuming this is because the camera is pointing at the south celestial pole....? When the camera is pointing west, thus catching the stars setting, we have a view similar to that involving the Temple of Poseidon at ...

More of "time-lapses" in this video are not very natural : it is obvious that the changing sky is added on a still image of landscape, For anyone who has physically done this kind of work, the "obvious" is NOT so obvious. If we keep the camera fixed, thus having a constant field...