Fast proper motion stars.

There are some fast proper motion stars up at the moment in Ursa Major.
Lalande 21185 (SAO 021185)at +7.5 shows the brightest red dwarf in ouf hemisphere. (RA 11h04m23s. +35 52′)At 8.31 light years away it is one of the nearest stars. It shows an enormous 4.78″ of proper movement per annum ( 8th largest motion)and has two giant planets of 5.8 and 30 year orbits.

Another fast mover is Groombridge 1830 ( SAO 62738) A variable +6.4. (RA 11h53m51s. +37 37’25”)This has the third fastest motion of 7.04″ per annum. ( Barnards star at 10.29″ and Kapteyn’s at 8.7″) It’s 29.7 light years away, part of the galactic halo. Incredibly old at 10 billion years.

Fastest of all is Barnard’s star (+9.5), it’s the fourth closest and the nearest in the northern hemisphere at 5.9 lys distance.

Of interest ,as regards observable motion,is Kruger 60 at the base of Cepheus, it orbits at 44.6 years.This is a wow pair of red dwarf binary for me ! Some of the smallest stellar masses known. RA 22h28m38s DEC +57 47′. Separation at 1.5″ at +9.8 and +8.3)I find it fascinating that over a few years we can observe changes such as these in the sky.

I was lucky enough to be handling some meteorites belonging to a friend the other day . Thinking about these not being any part of this planet was very moving. We are very lucky to have access to our Universe , to hold it in the hand is quite magical. You can collect your own micrometeorites by passing a magnet over any dry outdoor surface , such as rain gutters or that old paddling pool left out !

Nick.