Sentences with phrase «visual magnitude»

With an apparent visual magnitude of 6.3, [2] it lies below the normal brightness limit of stars that are visible with the naked eye under ideal viewing conditions.

To the unaided eye, the two main components appear as a single point of light with an apparent visual magnitude of − 0.27, forming the brightest star in the southern constellation of Centaurus and is the third - brightest star in the night sky, outshone only by Sirius and Canopus.

Xi Bootis A classified as a BY Draconis type, rotating variable star whose visual magnitude varies from 4.52 to 4.67 over 10.137 days.

Antares, also called Alpha Scorpii, red, semiregular variable star, with apparent visual magnitude about 1.1, the brightest star in the zodiacal constellation Scorpius and one of the largest known stars, having several hundred times the diameter of the Sun and 10,000 times the Sun's luminosity.

This tool was designed to check framing, not visual magnitude.

Denebola has been classed as a Delta Scuti - type variable star (which vary in brightness by small amounts over periods lasting only hours and including radial as well as non-radial pulsations) as it exhibits small, Delta Sculti - type variability with around a 2.09 to 2.16 visual magnitude difference — in V on UBV Johnson system (Mkrtichian and Yurkov, 1998).

Its brightest star, HD 93206 or QZ Carinae, is an eclipsing variable, varying between visual magnitudes 6.16 and 6.49, the main component being of spectral type O9III or B0Ib:; it is approaching us at about 16 km / sec.

The Sun would be a yellow star of an apparent visual magnitude of +0.5 in eastern Cassiopeia, at the antipodal point of Alpha Centauri's current right ascension and declination, at 02h 39m 35s +60 ° 50 ′ (2000).

With an apparent visual magnitude of +4.118, it is bright enough to be viewed with the naked eye.

A reddish giant star, it has an apparent visual magnitude of 1.15.

As usual for planetary nebulae, M76's visual magnitude is much brighter (9.6 according to Don Machholz» personal estimate, 10.1 according to Hynes; the present author thinks this is close to his own perception) than photographically (most sources agree on 12.2 mag photographically).

Cygnus is one of the most recognizable constellations of the northern summer and autumn, featuring a prominent asterism known as the Northern Cross (in contrast to the Southern Cross), dominated by Deneb (Alfa Cygni), a blue - white supergiant star of visual magnitude 1.3, very bright despite its distance of some 3200 light year from Earth.

Amateur astronomers may contribute more observations, but the asteroid will be very difficult for backyard astronomers to see, as current estimates are that it will reach a visual magnitude of only about 17 at its brightest, and it will be moving very fast across the sky.

At − 0.27 apparent visual magnitude (calculated from A and B magnitudes), it is fainter only than Sirius and Canopus.

Proxima usually appears as a deep - red star of an apparent visual magnitude of 11.1 in a sparsely populated star field, requiring moderately sized telescopes to see.

When considered among the individual brightest stars in the sky (excluding the Sun), Alpha Centauri A is the fourth brightest at an apparent visual magnitude of +0.01, being fractionally fainter than Arcturus at an apparent visual magnitude of − 0.04.

[34] Alpha Centauri B at an apparent visual magnitude of 1.33 would be twenty - first in brightness if it could be seen independently of Alpha Centauri A.

HE 1327 - 2326 (13:30:06 - 23:41:51 at Equinox 2000) has an apparent visual magnitude of 13.5 (Frebel et al, 2005).

It is also among the brightest, being at most little less luminous with its estimated apparent visual magnitude 7.4 than the brightest, the Helix Nebula NGC 7293 in Aquarius, with 7.3, which however has a much lower surface brightness because of its larger extension (estimates from Stephen Hynes); it is a bit unusual that this planetary is only little fainter photographically (mag 7.6).

Vega, also called Alpha Lyrae, brightest star in the northern constellation Lyra and fifth brightest in the night sky, with a visual magnitude of 0.03.

The open cluster has a diameter of approximately 20 ′, and has a visual magnitude of 6.0.

NGC 253 is 30 ′ x 7 ′, with a visual magnitude of 7.6 and a surface brightness of 13.2.

It has a visual magnitude of 3.658 and is approximately 600 light years distant.

The central white dwarf in the Dumbbell Nebula has a visual magnitude of 13.8 and an absolute magnitude of about 6, a third of the Sun's.

The brightest red giant stars in M30 have a visual magnitude of 12.1, while the cluster's brightest horizontal branch giants are of magnitude 15.1.

It has an apparent visual magnitude of 12.7 and is approximately 220 million light years distant from Earth.

The galaxy has an apparent visual magnitude of 14.7.

It has a visual magnitude of 12.2 and lies at an approximate distance of 11,000 light years from Earth.

It has a visual magnitude of 5.75 and is 24.31 light years distant from Earth.

It has a visual magnitude of 7.5 and an absolute magnitude of -0.5, which means that the nebula has an intrinsic luminosity roughly 100 times that of the Sun.

It has a visual magnitude of 4.81 and is approximately 410 light years distant from the solar system.

SN 1988A, a type II supernova with a visual magnitude of 13.5, was discovered on January 18, 1988, and SN 1989M, classified as type I, was first spotted on June 28, 1989.

Spica, Alpha Virginis, is the brightest star in Virgo and Menkent, Theta Centauri, is an orange giant with a visual magnitude of 2.06.

The system is composed of a blue - white giant with the stellar classification of B9III - IV and a visual magnitude of 5.33, a white subgiant belonging to the stellar class A0IVMn with an apparent magnitude of 5.63, and a star with a magnitude of 8.5 separated from the second component by 37.7 arc seconds.

It has a visual magnitude of 13.65 and is approximately 206 million light years distant.