Its apparent magnitude is 10. 6, and it is unique because it is younger than most other globular clusters in the same region as determined by its metallicity.

Generally the visible spectrum ( vmag ) is used for the apparent magnitude, but other spectrums such as the near-infrared J-band magnitude are also used.

It is also the apparent magnitude a star would have if it were 32. 6 light years ( 10 parsecs ) away from Earth.

In astronomy, to derive absolute magnitude from the observed apparent magnitude of a celestial object its value is corrected from distance to its observer.

The absolute magnitude is then equivalent to the apparent magnitude an object would have if it were at a standard luminosity distance ( 10 parsecs ) away from the observer, in the absence of astronomical extinction.

For galaxies ( which are of course themselves much larger than 10 parsecs, and whose overall brightness cannot be directly observed from relatively short distances ) the absolute magnitude is defined by reference to the apparent brightness of a point-like or star-like source of the same total luminosity as the galaxy, as it would appear if observed at the standard 10 parsecs distance.

In other words, the absolute magnitude of any object equals the apparent magnitude it would have if it was 10 parsecs away.

One can compute the absolute magnitude of an object given its apparent magnitude and luminosity distance:

For very large distances, cosmological redshift complicates the relation between absolute and apparent magnitude, and an additional k correction might be required.

In the Euclidean approximation for nearby objects, the absolute magnitude of a star can be calculated from its apparent magnitude and parallax:

You can also compute the absolute magnitude of an object given its apparent magnitude and distance modulus:

Vega has a parallax of 0. 129 ", and an apparent magnitude of + 0. 03

Alpha Centauri A has a parallax of 0. 742 " and an apparent magnitude of − 0. 01

Given the absolute magnitude, for objects within our galaxy you can also calculate the apparent magnitude from any distance ( in parsecs ):

Given the absolute magnitude, you can also compute apparent magnitude from its parallax:

The same holds for the dimensionless ratios of masses of fundamental particles ( the most apparent is m < sub > p </ sub >/ m < sub > e </ sub >, approximately 1836. 152672 ).

For instance, the Astronomical Almanac for 2010 lists the apparent geocentric position of the Moon, 1 Jan 2010 at 0h Terrestrial Time, in equatorial coordinates, as right ascension 6 < sup > h </ sup > 57 < sup > m </ sup > 48 < sup > s </ sup >. 86, declination + 23 ° 30 ' 05 ". 5.

Though it is apparent that they are actually the distances where the balls ended up after bouncing several times, there is no doubt that they both landed more than 500 feet ( 152 m ) from home plate.

In 1993, Devers won the 100 m World Championship title after-again-a photo finish win over Merlene Ottey in an apparent dead heat, and the 100 m hurdles title.

One part of this work is the Hubble luminosity law for reflection nebulae which make a relationship between the angular size ( R ) of the nebula and the apparent magnitude ( m ) of the associated star:

It is around magnitude 9. 9 m. NGC 4147 is a somewhat dimmer ( magnitude 10. 2m ) globular cluster with a much smaller apparent size.

Initially there was nothing to indicate that Cardigan was not going to conform to Raglan's intentions, and it was only after he had travelled some 200 yards (~ 180 m ) that the enormity of the misconstrued order became apparent to the spectators on the Sapouné Heights.

Solar noon is 12 o ' clock apparent solar time, or around 121 p. m. local time depending on daylight saving time, the moment when the sun crosses the meridian and is about at its highest elevation in the sky.

Under such " typical " dark sky conditions, the naked eye can see stars with an apparent magnitude up to + 6 < sup > m </ sup >.

When his wife checked on him at about 1 a. m., he had died of an apparent heart attack.

where m the apparent magnitude and M the absolute magnitude.

O ' Brien's contract stipulated that NBC could move the show back to 12: 05 a. m. without penalty, though the stipulation was mainly to be used for the limited run late-night NBC Sports recap shows for Wimbledon and the U. S. Open, rather than a permanent relocation, leaving him with no apparent recourse other than resignation.

As for instance, a solar type star ( M = 5 ) in Andromeda galaxy ( DM = 24. 4 ) would have an apparent magnitude ( m ) of 5 + 24. 4 = 29. 4, so it would be barely visible in the HST, which has a limiting magnitude of about 30.

Its brightest star is 31 Boötis, a G-type giant of apparent magnitude 4. 86 < sup > m </ sup >.

It is a suspected Gamma Cassiopeiae type ( GCAS ) variable star, with its apparent magnitude varying from 2. 62 < sup > m </ sup > to 2. 66 < sup > m </ sup >.

where m is a constant between 0 and 1 that controls the apparent smoothness of the surface.

# There is completeness, meaning the sample is complete and nothing is missed, to an apparent magnitude limit ( m < sub > lim </ sub >).

This type of inhibition reduces the maximum rate of a chemical reaction without changing the apparent binding affinity of the catalyst for the substrate ( K < sub > m </ sub >< sup > app </ sup > – see Michaelis-Menten kinetics ).

This variable star changes in apparent magnitude from 4. 3 < sup > m </ sup > to 5. 1 < sup > m </ sup > with a period of 7. 59 days.

Suppose that there are two reference frames S and S < nowiki > '</ nowiki >, where S < nowiki > '</ nowiki > is moving relative to S. The origin of S < nowiki > '</ nowiki > moves along some curve in S, which can be traced out by some vector C which is a function of t. The Einstein force is the apparent force acting on a particle of mass m in the S < nowiki > '</ nowiki > frame, and is defined by

In astronomy, a given point on the celestial sphere ( that is, the apparent position of an astronomical object ) can be identified using any of several astronomical coordinate systems, where the references vary according to the particular system.

* Aberration of light, which produces an apparent motion of celestial objects

The aberration of light ( also referred to as astronomical aberration or stellar aberration ) is an astronomical phenomenon which produces an apparent motion of celestial objects about their real locations.

The ecliptic is the apparent path of the Sun on the celestial sphere as seen from the Earth's center, and also the plane of this path, which is coplanar with the orbit of the Earth around the Sun.

The Sun, in its apparent motion along the ecliptic, crosses the celestial equator at these points, one from south to north, the other from north to south.

Periodic motions of the Moon and apparent periodic motions of the Sun ( actually of the Earth in its orbit ) cause short-term small-amplitude periodic oscillations of the axis of the Earth, and hence the celestial equator, known as nutation.

In the geocentric model of the solar system, the celestial spheres model was originally used to explain the apparent motion of the planets in the sky in terms of perfect spheres or rings, but after the planets ' motions were more accurately measured, theoretical mechanisms such as deferent and epicycles were added.

In both astrology and historical astronomy, the zodiac ( Greek: ζῳδιακός, zōidiakos ) is a circle of twelve 30 ° divisions of celestial longitude that are centered upon the ecliptic: the apparent path of the Sun across the celestial sphere over the course of the year.

The apparent motion of the Sun along the ecliptic ( red ) as seen on the inside of the celestial sphere.

The right ascension of any object crossing the meridian is equal to the current local ( apparent ) sidereal time, ignoring for present purposes that part of the circumpolar region north of the north celestial pole ( for an observer in the northern hemisphere ) or south of the south celestial pole ( for an observer in the southern hemisphere ) that is crossing the meridian the other way.

The term zenith is sometimes used to refer to the highest point reached by a celestial body during its apparent orbit around a given point of observation.

* Astronomical transit, the apparent motion of one celestial body across the face of another celestial body or meridian

This is the apparent orbit, the projection of the orbit of the two stars onto the celestial sphere ; the true orbit can be computed from it.

According to it, the light issued by celestial bodies served them as a propulsion for their apparent movements in the sky, just like for comets.

As the celestial poles shift, there is a corresponding gradual shift in the apparent orientation of the whole star field, as viewed from a particular position on Earth.

** Apparent magnitude, the apparent brightness of a celestial object as observed from Earth

A solar calendar is a calendar whose dates indicate the position of the earth on its revolution around the sun or equivalently the apparent position of the sun moving on the celestial sphere.

Diurnal motion is an astronomical term referring to the apparent daily motion of stars around the Earth, or more precisely around the two celestial poles.

* Table of the 57 navigational stars with apparent magnitudes and celestial coordinates

* Limb ( astronomy ) The outer edge of the apparent disk of as celestial body.