Celestial hemisphere:  Southern  ·  Constellation: Capricornus (Cap)
Getting plate-solving status, please wait...
Palomar 12, Gary Imm
Palomar 12, Gary Imm

Palomar 12

Getting plate-solving status, please wait...
Palomar 12, Gary Imm
Palomar 12, Gary Imm

Palomar 12

Equipment

Loading...

Acquisition details

Loading...

Description

This object is an extragalactic globular cluster located 60,000 light years away in the constellation of Capricornus at a declination of -21 degrees.  This magnitude 12 cluster spans 2 arc-minutes in our apparent view, which corresponds to a diameter of 40 light years.  The 3 bright stars seen in my image are not part of the cluster.

Palomar 12 is one of 15 faint globular clusters identified in the 1950s when found on POSS (Palomar Observatory Sky Survey) plates.  Upon discovery, this object was believed to be a nearby dwarf galaxy.  That conclusion was almost right.  Palomar 12 is not a nearby dwarf galaxy, but is from a nearby dwarf galaxy.

Most Milky Way globular clusters lie along the galactic plane.  This one lies far off of the plane.  A study of its motions concluded that this cluster did not originate in the Milky Way.  It was torn away from the Sagittarius Dwarf Spheroidal Galaxy about 2 billion years ago.

Comments

Revisions

  • Final
    Palomar 12, Gary Imm
    Original
  • Palomar 12, Gary Imm
    B

B

Description: Comparison to Hubble Image

Uploaded: ...

Sky plot

Sky plot

Histogram

Palomar 12, Gary Imm