| Coordinates/Direction : | RA: 16h10m, DEC: +47o48' |
| Object size : | Double star separation 17.5" |
| Object magnitude : | Primary 7.67, Secondary 10.71 |
| Object : | WDS STT 307 |
| Date : | 2019-02-16 |
| Time (UT) : | 00:45 to 00:56 |
| Exp. time : | 7x30 seconds ISO1600, 5x30 seconds ISO800, dithering mode |
| Image process tool : | AstroImageJ, Fitswork, IrfanView |
| Processing : | demosaic, flat, hot pixel removed by dithering, level. This is a 400x400 pixel 1:1 crop zoomed x2 |
| Weather : | clear |
| Comment : |
A new night with clear sky, need some inspiration.
Maybe I shall try to take photos of double stars?
I downloaded a double star catalog in my star chart software CdC and chose the object STT 307.
These two stars has an angle separation of 17.5".
My telescope system has pixel scale is 1.49"/ pixel.
But my camera is a color camera and then the separation is doubled to 3"/pixel seen from each color.
As you see there is easy to see the two stars even with this low pixel scale.
Note:
Just because the stars look to be close to each other it doesn't
mean that they have to be that in 3D-space.
Binary stars are different, that's two stars revolving each other.
WDS stands for Washington Double Star catalog.
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| More to know : |
Double Star, Wikipedia:
https://en.wikipedia.org/ wiki/ Double star
Stelledoppie, STT 307:
https://www.stelledoppie.it/ index2.php? iddoppia=65236
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English
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