M14 is an eighth magnitude globular cluster located in the constellation Ophiuchus. It was discovery by Charles Messier on June 1, 1764, who described it as a "round nebula without stars". In 1783, William Herschel became the first person to resolve it into stars. At 30,300 light-years from Earth this is one of the more distant Messier globulars. However, since it's intrinsically bright the globular can be seen with binoculars, although at best appearing only as a faint out of focus "fuzzy star".

M14 is located in a rather barren area of sky and therefore not easy to find. The cluster is positioned 8 degrees south and a little west of giant orange star Cebalrai (β Oph - mag. +2.8). Eleven degrees west of M14 are brighter globulars M10 and M12.

The best time of the year to observe it is during the months of May, June and July.

M14 globular cluster (credit:- Bill Keel/Lisa Frattare/Kitt Peak National Observatory)

Finder Chart for M14 (credit:- freestarcharts)

Finder Chart for M14 - pdf format (credit:- freestarcharts)

Although M14 resembles a fainter dimmer version of M10 and M12, it's still quite impressive. Through a small 80mm (3.1-inch) telescope the cluster has a bright centre surrounded by a fuzzy outer halo. A larger 200mm (8-inch) scope displays the elliptical nature of the object with some graininess, although no stars are resolvable. A telescope of 300mm (12 inches) aperture begins to resolve some of the individual stars, the brightest of which are at magnitude +14. The faint globular cluster NGC 6366 lies just over 3 degrees southwest of M14.

With an apparent mag. of +7.9, M14 is more than half a magnitude fainter than M12 and over a magnitude fainter than M10. The reason is due to distance; M14 is approx. twice as far away as M10 and M12. In reality, M14 is actually the largest of these three globulars but the distance factor wins out.

In total, M14 contains about 150,000 stars and has a spatial diameter of 100 light-years. It contains at least 70 variable stars, many of which are of the W Virginis variety. In 1938, a nova that peaked at mag. +9.2 erupted in the cluster.

M14 Data Table

Messier14
NGC6402
Object TypeGlobular cluster
ConstellationOphiuchus
Distance (light-years)30,300
Apparent Mag.+7.9
RA (J2000)17h 37m 36s
DEC (J2000)-03d 14m 46s
Apparent Size (arc mins)11 x 11
Radius (light-years)50
Age (years)13 Billion
Number of Stars150,000

Sky Highlights - March 2017

Comet
Comet 41P/Tuttle-Giacobini-Kresak now visible with binoculars as it heads towards perihelion

Mercury
Mercury heading towards greatest elongation east

Minor Planet
Vesta now visible with binoculars and small telescopes.

The Planets
This Month's Guide

Algol Minima
Algol eclipse dates and times for March 2017

Northern Hemisphere
Evening
West:- Venus (mag. -4.8 to -4.1 - first half of month), Mars (mag. +1.3 to +1.5), Uranus (mag. +5.9), Mercury (mag. -1.5 to -0.4 - second half of month)
Midnight
Southeast:- Jupiter (mag. -2.3 to -2.5)
Morning
Southwest:- Jupiter
Southeast:- Saturn (mag. +0.5)

Southern Hemisphere
Evening
West:- Venus (first half of month), Mars, Uranus
Midnight
North:- Jupiter
East:- Saturn
Morning
West:- Jupiter
Northeast:- Saturn
East:- Neptune (mag. +8.0 - second half of month)

Deep Sky
Naked eye / binoculars:-
Melotte 111 - Mel 111 - The Coma Star Cluster (Open Cluster)
Messier 44 - M44 - The Praesepe (Open Cluster)

Telescopes:-
Messier 67 - M67 - Open Cluster
Messier 51 - M51 - The Whirlpool Galaxy (Spiral Galaxy)
Messier 97 - M97 - The Owl Nebula (Planetary Nebula)
Messier 101 - M101 - The Pinwheel Galaxy (Spiral Galaxy)
Messier 65 – M65 – Spiral Galaxy
Messier 66 - M66 - Intermediate Spiral Galaxy
Messier 95 - M95 - Barred Spiral Galaxy
Messier 96 - M96 - Intermediate Spiral Galaxy
NGC 4244 - Spiral Galaxy
NGC 4565 - Needle Galaxy - Spiral Galaxy

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