- Constellation: Ursa Major
- Right Ascension: 09 13 19.679
- Declination: 09 13 19.679
- Distance: 20.6 ly
- Apparent Magnitude: 7.6, 7.7
Here we have HD79210, a double star located 20 light years away in the constellation Ursa Major. The pair of stars orbit each other once every 975 years. The primary star is a magnitude 7.64, and the secondary star is 7.70, so they both about the same brightness. They both are slightly cooler of the Sun, being K, and M class stars which are orange-red dwarf stars.
Many stars have orbiting companions, most are too far away, or orbit too close to see, other than by spectroscopic observation. Our Sun is in the minority in that it has no known stellar companions.
Imaged under a full Moon, using 120 second exposures for each red, green, and blue filters.
- Details
- Category: Stars
- Telescope: EDT 80mm Reftactor
- Camera: Atik 314l+
- Constellation: Ophiuchus
- Right Ascension: 16h 30m 18.0584s
- Declination: –12° 39′ 45.325″
- Distance: 7.9 ly
- Apparent Magnitude: 10.07
Another entry from astronomer Max Wolf's catalog of stars displaying high proper motion across the sky. Wolf 1061 is an M class red dwarf located constellation of Ophiuchus at a distance of 13.8 light years from Earth. It's claim to fame came in 2015 when a team analyzing 10 years worth of data from the HARPS spectrograph along with photometry measurements announced the discovery of three low mass, possibly rocky planets orbiting Wolf 1061. Two of the planets would lie near the habitable zone.
Imaged using the ED80CFT refractor and Atik 314L+ mono ccd, using 13 x 120 second exposures through R/G/B filters.
- Details
- Category: Stars
- Telescope: EDT 80mm Reftactor
- Camera: Atik 314l+
- Constellation: Leo
- Right Ascension: 10h 56m 28.99s
- Declination: +07° 00′ 52.0″
- Distance: 7.9 ly
- Apparent Magnitude: 13.5
Wolf 359 is a red dwarf star located in the constellation of Leo. The name comes from Max Wolf who cataloged stars that were measured moving across the sky, and it was entry number 359.
Even though its one of the closer stars to us at only 7.8 light years, it is an exceedingly dim star at magnitude 13.5. It has just barely enough mass to fuse hydrogen at an estimated 9% mass of our Sun.
And of course its the location of where the Star Trek Federation made their stand against the Borg ;-)
In the image, the cross shows where the star catalog says its at, the picture shows where it is actually at now, and the insert shows where it was a year ago. If you look closely, you can tell they star has shifted slightly in a year.
Image taken with the ED80CFT refractor and Atik 314L+ mono ccd through some thin cirrus clouds, at 7 x 300 exposures through R/G/B filters.
- Details
- Category: Stars
- Telescope: EDT 80mm Reftactor
- Camera: Atik 314l+