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M5

Astronomy M49M50

M5 = NGC5904 ( 15h 18.6m +2°05´, 5.8 mag )
Kirch discovered this globular cluster in Serpens in 1702 and Messier observed it on May 23, 1764. It is approximately 25,000 ly away and contains more than 500,000 stars in 130 ly globe.

 


M5 (globular cluster)
M16 part of the Eagle Nebula (open cluster)
Serpens is a particularly annoying constellation for people like me who try to catagorize them.

M5 motorway (Northern Ireland)M5 NetworksM5 South Western Motorway
M6M60M600
M602 motorwayM606 motorwayM60 machine gun ...

A binary (M5.5e V, M6e V) (component B is UV Cet) with a very small mass (total mass of system [1974] 0.3 M ). It is about 2.7 pc distant.
Lyapounov Exponent ...

Proxima is a M5.5V spectral class red dwarf with an absolute magnitude of +15.53, which is considerably less than the Sun. By mass, Proxima is presently calculated as 0.123±0.06 Mʘ (rounded to 0.12 Mʘ) or about one-eighth that of the Sun.[44] ...

Though of the third magnitude (3.48, nearly fourth) as seen from Earth, the star itself is magnificent, a red class M (M5) supergiant (or bright giant) with a surface temperature of about 3300 degrees Kelvin.

This cool and dim, main sequence red dwarf (M5.6 Ve) may have about 10 to 11 percent of Sol's mass (Geyer et al, 1988; and RECONS estimate), 14 percent of its diameter (Johnson and Wright, 1983, page 649), and less than 6/100, ...

Conceiving the line NN' to be that of the nodes at any time, and the earth and lunar orbit to be moving in the direction of the straight arrows, the earth will be on one side of the ecliptic from M2 to M5, and on the other side from M6 to M 1, ...

Located in the constellation Serpens, globular cluster M5 is one of the few to show an elliptical shape. It is believed to be one of the oldest of the globular clusters, at an age of about 13 billion years.

There are two Messier objects in Serpens: M5 and M16; the first is found in the "head" of the serpent, the second in the "tail". M5 (NGC 5904) is a spectacular globular cluster, containing a half a million stars.

The double delta Aps consists of two orange-red 5th mag stars; delta1 Aps is a M5 giant and delta2 Aps a K3 giant. They can easily be observed with binoculars.
The double kappa1 Aps and kappa2 Aps is a bit more faint.

Rigel Kentaurus C is a cool red M5.5Ve main sequence dwarf with a Visual Magnitude of 11.1, corresponding to a luminosity of about 1/17,000 that of the sun. This star is known as Proxima Centauri.
The Nearest Star ...

From Omega Centauri to M5, spring's globulars offer diverse targets for all observers.
By Steve Coe
How historic observatories will survive ...

Ross 248 is a real star in the constellation Andromeda. Modern scientists have determined it is spectral class M5.5eV.
[edit] External links
Ross 248 at Wikipedia
Ross 248 at the Internet Stellar Database ...

Red dwarf stars are believed to be the most common star type in the universe. Proxima Centauri, the nearest star to the Sun is a red dwarf, (Type M5, magnitude 11.0) as are twenty of the next thirty nearest.

(b) A spectroscopic triple (F8-G0 III, G5 III, M5 V) with a period of 104.023 days, about 13 pc distant (1974 parallax 0'.079). It has a high lithium content and a nearly circular orbit. It may be an X-ray source. [H76] Capture ...

Whereas Alpha Centauri A and B are stars like the Sun, Proxima is a dim red dwarf with a spectral type of M5 - much fainter, cooler, and smaller than the Sun. Proxima is so faint that astronomers did not discover it until 1915.

is Proxima Centauri, aka Alpha Centauri C (the dimmest star in the Alpha centauri system). Proxima Centauri is about 4.2 light-years from the Sun. It has an absolute magnitude of 15.5 and an apparent magnitude of +11.05 (variable). Spectral type M5.

It is a faint red dwarf star, apparent magnitude 9.5, of spectral class M5, lying near the bottom of the main sequence in the Hertzsprung-Russell diagram. Slight oscillations in its motion indicate that it has at least one unseen companion.

The spectrum of an M star shows lines belonging to molecules and all neutral metals but hydrogen lines are usually absent. Titanium oxide can be strong in M stars, usually dominating by about M5. Vanadium oxide bands become present by late M.

See also: Star, Light, Sky, Constellation, Dwarf