Another Nova Del 2013
Posted 20 August 2013 - 12:35 PM
Posted 20 August 2013 - 02:56 PM
Posted 20 August 2013 - 03:51 PM
Not every sketch must be very spectacular... this is a fine sketch that must be shown on a forum like this! Just one question: on my computerscreen I see a deeper black around almost every star?
but I think this pretty well represents what I saw while looking at Nova Del 2013
Posted 20 August 2013 - 04:47 PM
Thanks for your comments and review.
My original sketch is pretty rough with stars crossed out and moved as I progressed. I'm not very good yet and need to erase a lot and adjust star positions etc. Working like that makes for a pretty messy original. I made notes right on the sketch to indicate which stars were brighter and dimmer because I knew I would use Photoshop later and could clone them out for the final version. I'm not sure how or if there is a universally accepted way to render my sketches, so I just photographed the page, opened it in Photoshop, converted it to gray scale and inverted it. Then I made the stars more round with a brush, removed my notes and mistakes with the "clone tool" and used the "burn" tool to darken the stars until the image looked like what I saw in the EP according to my notes. I finished by adding the title and text. On my screen, the background is dark enough the it doesn't show any "dark halo" unless I lighten the image. I maybe should have made all the adjustments to the original positive image then inverted as the last step. Live and learn, right?
In order to show the image more accurately, I still need to lighten the FoV to a dark to medium gray to simulate the light pollution from the full moon and haze, but I'll need to do more research to figure out how best to do this.
I'll look around for some tutorials, but if you have any suggestions, I'd love to hear them!
Posted 20 August 2013 - 06:36 PM
Posted 21 August 2013 - 05:56 AM
That's a good observational sketch and you'll get better at processing with practice. For an object like this nova, you might want to try composing the ep view (if possible) by including a nearby star with the magnitude noted for comparison purposes.
Posted 21 August 2013 - 06:59 PM
Michael, I thought about labeling the 8th mag star to the NNW of the Nova, but I didn't want to imply that the difference in brightness was accurate. I'll keep that in mind in the future though. Thanks for the tip!
I looked last night in my 15X70s and compared it to 29 Vul and it was noticeably dimmer. The night before, I couldn't tell if one was dimmer than the other. I hope it stays bright for a while longer though!
Posted 22 August 2013 - 06:41 PM
I labeled the 8th magnitude star as Michael encouraged me to do. I'll try to remember that in the future. I do like the look of just "naked" stars or objects in the FoV, so I may go back to no labels or put the label outside the FoV.
As always, let me know what you think and any tips or tricks will be very helpful!
Posted 23 August 2013 - 11:40 PM