- Constellation: Lyra
- Right Ascension: 19 20 09.1511530426
- Declination: Dec +37 52 36.915069066
- Distance: 10457 ly
- Apparent Magnitude: 8.3 - 13.5
Continuing the journey through Lyra's carbon stars we have U Lyr. It varies in magnitude from 8.3 down to 13.5 in around 451 days. It is also an optical double star with the other star just visible in the 2:00 position in the halo of the image. An optical double is just a chance alignment ot two stars. Like most carbon stars it tend to be very reddish, but the red tends to be over-saturated in images giving it a more orangeish appearance. Its actual B-V color index is 4.63.
Just to the lower right of it is an interesting open cluster NGC 6791.
- Details
- Category: Stars
- Telescope: Explore Scientific 127 Refractor
- Camera: ZWO 2600 MM
- Constellation: Lyra
- Right Ascension: 18h 32m 20.10s
- Declination: +39° 59′ 55.6″
- Distance: 2350 ly
- Apparent Magnitude: 7.5 - 9.2
Continuing through Lyra's carbon stars, we have T Lyr, a slow irregular period variable star that varies between 7.5 and 9.2 magnitude.
- Details
- Category: Stars
- Telescope: Explore Scientific 127 Refractor
- Camera: ZWO 2600 MM
- Constellation: Lyra
- Right Ascension: 18h 42m 50.00s
- Declination: +36° 57′ 30.9″
- Distance: 4468 ly
- Apparent Magnitude: 7.5 - 8.4
HK Lyr is a semi-regular variable carbon star, and easy to identify in this image due to its reddish-orange color. On a approximate period of 186 days, its magnitude varies between 7.5 and 8.4. It's B-V index is 3.08.
- Details
- Category: Stars
- Telescope: Explore Scientific 127 Refractor
- Camera: ZWO 2600 MM
- Constellation: Cygnus
- Right Ascension: 20h 25m 58.04s
- Declination: +38° 21′ 07.7″
- Distance: 5,000 ly
- Apparent Magnitude: 10.60 - 11.74
A red super giant star located the constellation of Cygnus. Interstellar dust and gas in that area dims reddens the star. Some of that dust can be seen as darker splotches dimming the stars behind it. A variable star, but no regular repeatable cycle.
- Details
- Category: Stars
- Telescope: Explore Scientific 127 Refractor
- Camera: ZWO 2600 MM
- Constellation: Canes Venatici
- Right Ascension: 12h 45m 07.826s
- Declination: +45° 26′ 24.93″
- Distance: 760 - 1000 ly
- Apparent Magnitude: +4.86 - +7.32
Also know as its popular name La Superba, a giant red star, and one of the reddish known with a B-V index of 2.54. A carbon in the star's outer shell absorbs blue light giving its distinctive reddish light. Primary has a 160 day cycle in its magnitude variations. The star is in its final stages of its evolution and is expected to expel its outer layers in the future, and form a planetary nebula before shrinking down to become a slowly cooling white dwarf.
- Details
- Category: Stars
- Telescope: GSO RC10
- Camera: ZWO 2600 MM
- Constellation: Sagittarius
- Right Ascension: 18h 03m 32.14s
- Declination: -30d 02m 06.96s
Baade's Window is the largest of 6 relative dust free zones allowing astronomers to study stars in the central bulge of the Milky Way Galaxy. Nothing illustrates the billions of stars in our galaxy like a view of the view of the galactic center, even if only a tiny slice.
Also visible are two globular clusters, NGC 6522 at the center and NGC 6528 below. NGC 6522 is centered in the view of Baade's Window, and at an estimated age of 12 billion years makes it one of the oldest around our galaxy and lies at a distance of 25,100 light years. NGC 6528 is 25,800 light years distant and is unusually meta rich for a globular
The bright star in the lower left is W Sgr, which is a multiple star system, and the primary star is a classical Cepheid variable star that it's magnitude varies over 7 1/2 days.
- Details
- Category: Stars
- Telescope: Explore Scientific 127 Refractor
- Camera: ZWO 2600 MM
Page 3 of 10