Archive

Posts Tagged ‘Alpha Persei Association’

11/13/2020 – Ephemeris – Finding Perseus the hero in the stars

November 13, 2020 Comments off

This is Ephemeris for Friday, November 13th. Today the Sun will be up for 9 hours and 38 minutes, setting at 5:16, and it will rise tomorrow at 7:39. The Moon, 2 days before new, will rise at 6:41 tomorrow morning.

About a third the way from the east northeastern horizon to the zenith at 8 p.m. and below the letter W shaped constellation of Cassiopeia the queen is Perseus the hero. It’s kind of an odd shape for a hero, To me it looks kinda like the cartoon roadrunner. To those who’re mathematically inclined its shape is also like the Greek letter pi on its side. It’s two brightest stars are Mirfak and Algol the demon star, the still winking eye of Medusa. Look at the area around Mirfak with binoculars and a large group of stars just below naked eye visibility will appear. It’s called the Alpha Persei Association. That’s because Mirfak is also known as Alpha Persei. The group is about 560 light years away, which means, though close, are farther away than the Pleiades, which is below and to the right of them.

The event times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addendum

Perseus finder animation

Perseus finder animation for 8 pm November 13, 2020. The star Mirphak in the image is generally spelled Mirfak and is also designated Alpha Persei.

Alpha Persei Association

The Alpha Persei Association. The brightest star is Mirfak (Alpha Persei). This a an extreme crop from a photograph taken February 18, 2017, Canon EOS Rebel T5, 121 seconds, f/3.5, 18mm fl., ISO 3200. Credit Bob Moler.

10/29/2018 – Ephemeris – Perseus the hero

October 29, 2018 Comments off

Ephemeris for Monday, October 29th. The Sun will rise at 8:16. It’ll be up for 10 hours and 18 minutes, setting at 6:35. The Moon, 2 days before last quarter, will rise at 10:48 this evening.

bout a third the way from the east northeastern horizon to the zenith at 9 p.m. and below the letter W shaped constellation of Cassiopeia the queen is Perseus the hero. It’s kind of a odd shape for a hero, To me it looks like the cartoon roadrunner. To those who’s imagination doesn’t run to cartoons, its shape is also like the Greek letter pi. It’s two brightest stars are Mirfak and Algol the demon star. Look at the area around Mirfak with binoculars and you will see a large group of stars just below naked eye visibility. It’s called the Alpha Persei association. That because Mirfak is Alpha Persei. The group is about 560 light years away, which means, though close, are farther away than the Pleiades, below and right of them.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addendum

Perseus and Algol Finder
Perseus, Cassiopeia, Andromeda with Algol finder animation for Autumn evenings. Created using Stellarium and GIMP.

Alpha Persei Association
Alpha Persei Association.  Mirphak or Mirfak is Alpha Persei, Created using Stellarium.

11/14/2017 – Ephemeris – The constellation of Perseus the hero

November 14, 2017 1 comment

Ephemeris for Tuesday, November 14th. The Sun will rise at 7:38. It’ll be up for 9 hours and 37 minutes, setting at 5:15. The Moon, half way from last quarter to new, will rise at 4:29 tomorrow morning.

About half way up from the east northeastern horizon to the zenith at 9 p.m. and below the letter W shaped constellation of Cassiopeia the queen is Perseus the hero. It’s kind of an odd shape for a hero, To me it looks like a maybe the cartoon road runner running along the road. To those who’s imagination doesn’t run to Loony Tunes, its shape is also like the Greek letter pi. It’s two brightest stars are Mirfak and Algol the demon star. Look at the area around Mirfak with binoculars and you will see a large group of stars just below naked eye visibility. It’s called the Alpha Persei association. That because Mirfak is Alpha Persei. The group is about 557 light years away, which means, is quite close, but farther away than the Pleiades, below and right of them.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addendum

Perseus with Cassiopeia and Andromeda in the northeast at 9 p.m. October 20, 2016. Created using Stellarium and GIMP

Perseus with Cassiopeia and Andromeda in the northeast at 9 p.m.  Created using Stellarium and GIMP.

11/28/2014 – Ephemeris – Not quite a star cluster, but pretty cool nonetheless

November 28, 2014 Comments off

Ephemeris for Friday, November 28th.  The sun will rise at 7:55.  It’ll be up for 9 hours and 9 minutes, setting at 5:04.   The moon, 1 day before first quarter, will set at 12:01 tomorrow morning.

When is a star cluster not a star cluster?  When it’s an association.  That is when it has begun to dissipate because the gravitational force of the group cannot hold it together.  The central stars of the Big Dipper belong to The Ursa Major Association.  Below the W shaped constellation of Cassiopeia in the northeast at 9 or 10 p.m.  Is the constellation of Perseus (Per-seus or Pers-e-us) as it is usually pronounced.  Its brightest star is Mirfak with a designation of Alpha Persei.  There are some stars there to the naked eye, but with binoculars there are a great many stars just below naked eye visibility.  This is called the Alpha Persei association.  It is perfect to spot with binoculars, but way too wide-spread for a telescope.

Times are for the Traverse City/Interlochen area of Michigan.  They may be different for your location.

Addendum

The Constellations Cassiopeia, Perseus and Auriga. Cartes du Ciel

The Constellations Cassiopeia, Perseus and Auriga. Cartes du Ciel

Alpha Persei Association

Alpha Persei Association. Created using Stellarium.

 

10/28/2013 – Ephemeris – The constellation Perseus the hero

October 28, 2013 Comments off

Ephemeris for Monday, October 28th. The sun will rise at 8:15. It’ll be up for 10 hours and 21 minutes, setting at 6:36. The moon, 2 days past last quarter, will rise at 2:54 tomorrow morning.

About a third the way from the east northeastern horizon to the zenith at 9 p.m. and below the letter W shaped constellation of Cassiopeia the queen is Perseus the hero.  It’s kind of a odd shape for a hero,  To me it looks like a chicken running across the road.  To those who’s imagination doesn’t run to poultry, its shape is also like the Greek letter pi.  It’s two brightest stars are Mirfak and Algol the demon star.  Look at the area around Mirfak with binoculars and you will see a large group of stars just below naked eye visibility.  It’s called the Alpha Persei association.  That because Mirfak is Alpha Persei.  The group is about 560 light years away, which means, though close, are farther away than the Pleiades, below and right of them.

Times are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addendum

Perseus

Perseus finder chart. Note the star Mirfak is spelled Mirphak on the chart. Created using Stellarium.

Alpha Persei Association

Alpha Persei Association. Created using Stellarium.

 

Perseus and the head of Medusa from the 1690 Uranographia by Johannes Hevelius.

Perseus and the head of Medusa from the 1690 Uranographia by Johannes Hevelius. Image found with the article on Algol in Wikipedia.

 

10/18/2012 – Ephemeris – Autumn wonders for binoculars or small telescope: The Alpha Persei Association

October 18, 2012 Comments off

Ephemeris for Thursday, October 18th.  The sun will rise at 8:02.  It’ll be up for 10 hours and 49 minutes, setting at 6:52.   The moon, half way from new to first quarter, will set at 9:17 this evening.

When is a star cluster not a star cluster?  When it’s an association.  That is when it has begun to dissipate because the gravitational force of the group cannot hold it together.  The central stars of the Big Dipper belong to The Ursa Major Association.  Below the W shaped constellation of Cassiopeia in the northeast at 9 or 10 p.m.  Is the constellation of Per-seus or Pers-e-us as it is usually pronounced.  Its brightest star is Mirfak with a designation of Alpha Persei.  There are some stars there to the naked eye, but with binoculars there are a great many stars just below naked eye visibility.  This is called the Alpha Persei association.  The star groups I’ve talked about this week are just some of the wonders visible in a simple pair of binoculars.

Times are for the Traverse City/Interlochen area of Michigan.  They may be different for your location.

 

Addendum

The constellation Perseus.  (Stellarium spells Alpha Persei Mirphak, not Mirfak.  Star name spelling can be something variable.)

The constellation Perseus in the northeast at 10 p.m. on October 18, 2012.  Created using Stellarium.

The constellation Perseus in the northeast at 10 p.m. on October 18, 2012. Created using Stellarium.

The Alpha Persei Association in a binocular view.  Created using Stellarium.

The Alpha Persei Association in a binocular view. Created using Stellarium.