The Moon with a small refractor – December 3, 2016

Posted in ASTRO on December 4, 2016 by maxpho

A small mosaic of our Moon acquired with a 115mm Refractor telescope on the evening of December 3, at -2 degrees Celsius and crystal clear skies.

MoonWith115mmDec3.jpg

Hubble’s Variable Nebula- December 3, 2016

Posted in ASTRO on December 4, 2016 by maxpho

I’ve started the acquisition of frames for a long-term animation. The subject is one of the more dynamic deep-sky objects around: the Hubble’s Variable Nebula.

More about this object can be found HERE.

My first shot was acquired in poor conditions, with bad seeing and rather cold temperatures (only -8 degrees Celsius).

I’ve also observed the nebula together with my brother-in-law through the eyepiece at 60x with the 14 inch scope. Only the brightest part of the nebula, of a triangular shape and uniform luminosity, was easily detectable.

NGC 2261.jpg

High Resolution lunar images – November 19, 2016

Posted in ASTRO on November 20, 2016 by maxpho

Being motivated by the previous lunar imaging session (with good to excellent seeing conditions) I’ve decided to force my luck and get to my imaging location yet another morning. This time I had my brother-in-law to “confirm” the seeing conditions at the eyepiece.

Same apparent conditions (fog, cold) but this time the excellent seeing conditions were present for only a few tens of seconds. Mostly, the value never exceeded 6/10. Yet, those very few 8-9/10 moments were enough to capture some of my very best lunar images to date, with details of 500 meters or less discernible in most shots.

For now, Lacus Mortis in excellent conditions:

LacusMortis.jpg

Rimae Ariadaeus in variable seeing conditions (6-8/10). Still, some craters of 550-600 meters are discernible:

RimaeAriadaeus.jpg

Crater Fracastorius and the nearby giant dome:

FracastoriusMaxNov19.jpg

Shadow evolution in 24 hours in the Theophilus-Cyrilus area:

Theophilus and Cyrillus Nov 2016.jpg

And a 3D RedBlue image of Theophilus created from the Nov 19 image and another one from September 3, 2015!

This must be viewed using Red-Blue glasses…

TheoCyr.jpg

For those not having such glasses, a animation from the two images:

THEO3D.gif

High Resolution lunar images -November 18, 2016

Posted in ASTRO on November 18, 2016 by maxpho

November 18 was a perfect night for HR lunar images: a bit of fog near the ground, no wind, only -5 degrees Celsius and low jet stream. These factors allowed for some near-perfect seeing conditions, with a value of 7/10 most of the time, and 8-9/10 occasionally. The last time I had such conditions was almost a year ago.

First, one shot with craters Theophilus and Cyrillus being the main subjects. Craters as small as 450-500 meters can be discerned.

TheophilusCyrillus.jpg

Lacus Mortis with crater Burg at the center, in slightly less perfect conditions:

LacusMortisBurg.jpg

The very interesting half-of-a-crater Fracastorius with its inner rimae; details of 500 meters and below are observable:

Fracastorius.jpg

Rima Cauchy and Rupes Cauchy in excellent seeing. Details of 400-450 meters are discernible:

RimaRupesCauchy.jpg

Giant crater Janseen with its inner rimae system, in low-angle illumination and very good to superb seeing conditions.

Janssen.jpg

Crater Posidonius and the near-by areas with lost of rilles. This shot was acquired in excellent conditions, and crater of 400 meters can be detected:

Posidonius.jpg

The lunar South Pole area, under good seeing conditions (but only 6-7/10). Craters Clavius and Moretus and the southern mountains offer a very nice perspective of the lunar terrain:

TheSouth.jpg

Craters Capella and Gutenberg. Capella is the strange flower-looking crater left of center, while Gutenberg is the large lava-filled crater right of center. Note the large number of rilles crossing the frame. Craters of around 550-600 meters are present in the image.

Gutenberg.jpg

From Atlas and Hercules to Posidonius:

AtlasPosidonius.jpg

Reprocessed version of Theophilus image:

TheophilusMaxNov2016.jpg

Hercules and Atlas craters, normal and perspective-corrected (aerial) view:

Hercules and Atlas Max.jpg

A reprocessing of the Posidonius image:

PosidoniusNovMax2016.jpg

 Copernicus crater under high illumination:

CopernicusNovMax.jpg

And Copernicus in RGB with data for color from October 2015. Note the many hues inside the crater floor and rim:

CopernicusRGB.jpg

Crater Janssen on the terminator; a rather hard to image target at this illumination due to the strong contrast of some crater rims:

JanssenMax.jpg

And a Posidonius comparison between the Lunar Orbiter 4 image, back in 1967, and my own from a few days ago. “Only” 50 years were necessary for amateurs back on Earth to get close to the spacecraft resolution from half a century ago. I might still need a few more years to actually get to the same resolution (the LO4 image shows craters of around 260-280 meters), but craters of 400 meters are detectable in my image. My shot is perspective-corrected to better compare the two views; this type of processing slightly distorts my image, but the smallest details are still there.

LO4.jpg

High Resolution lunar images – November 16, 2016

Posted in ASTRO on November 16, 2016 by maxpho

Got another shot at the Moon last night. Good seeing conditions, but far from what I was expecting; the local conditions looked very good up until I’ve set up my telescope (low fog, no wind), but after 10 minutes at the eyepiece, the fog dissipated, and a soft breeze started. The seeing continued to be above average, but only rarely got a 6-7/10 value.

Equipment: 355mm F/4.5 homemade Newtonian, TeleVue 2x Powermate, Baader 2.25x Barlow, Baader Red filter, ASI 174MM camera.

First shot shows crater Langrenus under favorable illumination:

Langrenus2016.jpg

Second, a nice view of the mountains on the rim of Mare Crisium:

mare crisium 2016.jpg

Craters Messala (the large one left of center) and Geminus (the “fresh” looking one near the center):

MessalaGeminus.jpg

There are two nice lava patches observable in the above image, marked in the following crop:

lava .jpg

Crater Petavius:

petavius.jpg

Colorful Moon – November 13, 2016

Posted in ASTRO on November 14, 2016 by maxpho

Playing with telescope under extreme conditions (strong wind, low temperatures, pooooor seeing conditions). The image shows the colors of the Moon surface, of course highly saturated. Note the Vallis Schroteri abundance of colors, and Copernicus’s golden hue.

Colors.jpg

Equipment: 355mm F/4.5 Newtonian, ASI 120MM-S at the focal plane, Baader RGB filters. Seeing 3/10. Strong wind. -1 Celsius.

And an “almost superMoon”:

almost supermoon.jpg

H-alpha Sun – November 11, 2016

Posted in ASTRO on November 13, 2016 by maxpho

Amazingly for this period of the year, with the Sun hanging at only 27-29 degrees above the horizon, I had a few good seeing moments (for this altitude) for some H-alpha and white light imaging.

The equipment: Teleskop Service 115 APO refractor with a Lacerta wedge prism for white light imaging and a 3x barlow, and the Quark chromosphere for the H-alpha images. In both situations I’ve used the ASI 174MM camera.

First, the white light shot, showing the sunspot groups 2608 (left) and 2607 on the limb:

ARgroups.jpg

And the H-alpha shots:

Nov11Halpha.jpg

prom1A.jpg