Auva Star Facts (Delta Virginis)

Auva, also known as Delta Virginis (Bayer) is a red giant branch star located in the constellation of Virgo, The Virgin.

Based on the spectral type (M3III), Auva colour is red, which means that the star is one of the colder stars in the Universe, colder than our star.

Auva temperature is in the range of between 2,400 to 3,700 Kelvin. Based on the spectral type (M3III) as we don't have the exact temperature', we can deduce that the surface temperature of Auva is in the order of below 3,500K based on the notes from Harvard University. To put this in context, the temperature of our Sun is about 5,778 Kelvin as said by Google.

Based on a parallax of 16.44, Auva distance from Earth can be calculated at being 198.40 light years away or 62.07 parsecs.

Auva is a naked-eye star, so you don't need a telescope or binoculars when you look up on a clear night. The lower the magnitude, the easier it will be to see it.

Location

Auva location in sky is determined by the right ascension (R.A.) and declination (Dec.). These are equivalent to the Longitude and Latitude on Earth. The Right Ascension (Longitude) is expressed in time (hh:mm:ss) and is how far the star is along Earth's celestial equator. If the R.A. is positive, then it's eastwards and vice versa.

The Declination (Latitude) is how far north or south the object is compared to the celestial equator and is expressed in degrees. If the value is positive, it is north of the celestial equator. For Auva, the location is 12h 55m 36.48 and +03°23`51.4 .

Based on the location of Virgo, Auva can be located in the equatorial region of the celestial sky. The celestial hemisphere is equivalent to the hemispheres on Earth. Being in the equatorial region, Auva can be seen in both terrestrial hemispheres but there is a caveat of depending how far south and north you are. Auva is on the Ecliptic. The Ecliptic is the path that the Earth takes as it orbits the Sun. As the Earth is titled, we therefore have Celestial and Ecliptic hemispheres and they can be different for a star.

Physical Properties

Spectral Type

Auva spectral type of M3III which means its colour and type is red Red Giant Branch Star. There is no relationship between colour and size. For example, a red star can be large or small. Small stars are more energy efficient than larger stars and live longer.

Magnitude (Apparent / Absolute / Visible)

A number represents a star’s magnitude, whether apparent/visual or absolute. The smaller the number, the brighter the star is. The Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. A faint star will have a high number.

Auva apparent magnitude is 3.39, which is a measure of the star's brightness as seen from Earth. Apparent Magnitude is also known as Visual Magnitude.

If you use the 1997 parallax value, Auva' absolute magnitude is -0.57. If you use the 2007 parallax value, Auva' absolute magnitude is -0.53. Absolute Magnitude is the star's apparent magnitude from 10 parsecs or 32.6 light years. The magnitude assumes nothing is between the object and the viewer, such as dust clouds. To compare different stars' actual brightness, you would best use Absolute rather than Apparent Magnitude.

Auva is visible from Earth without needing binoculars or a telescope. The lower the Apparent Magnitude of a star or other object is, the easier it is to see in the night sky. An object with a magnitude greater than 6.5 cannot be seen without a telescope or other device.

Auva Distance from Earth

Auva distance from Earth is 202.46 light-years away from Earth or 62.07 parsecs. If you want that in miles, it is about 1,190,186,493,054,753.681, based on 1 Ly = 5,878,625,373,183.61 miles. The distance is calculated using the parallax from the original Hipparcos data released in 1997 which is 16.11000.

In 2007, Hipparcos data was revised with a new parallax of 16.44000, which puts the Auva distance from Earth as 198.40 light years or 60.83 parsecs. It should not be taken as though the star is moving closer or further away from Earth. It is purely that the distance was recalculated.

An Astronomical Unit is the distance between Earth and the Sun. The number of A.U. is the number of times that the star is from the Earth compared to the Sun. When you use the 2007 distance, Auva is roughly 12,547,000.735 Astronomical Units from the Earth/Sun give or take a few.

Auva Fact List

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Summary Facts

Primary Name:

Auva

Spectral Type:

M3III

Star Type:

Red Giant Branch Star

Colour:

red

Galaxy:

Milky Way

Constellation:

Virgo

Celestial Hemisphere:

Equatorial Region

Main Star

: Yes

Visual / Apparent Magnitude

: 3.39

Visible From Earth

: Yes

Absolute Magnitude

: -0.53

Radial Velocity

: -18.87000 km/s

RedShift

: -0.0000630000

Location/Coordinates

Right Ascension

: 12h 55m 36.48

Declination

: +03°23`51.4

Distance from Earth

Parallax

: 16.44000

Light Years

: 198.40

Parsecs

: 60.83

Astronomical Units (A.U.)

: 12,547,000.735

Proper Motion

: (milliarcseconds/year)

Declination

: -52.83 ± 0.14

Right Ascension

: -469.99 ± 0.22

Miscellaneous Facts

B-V Index

: 1.57

Alternate Names

:

Delta Virginis, Minelauva, HIP 63090