If it were placed in the center of the Solar System, it would extend to between the orbits of Mars and Jupiter. Older estimates give up to 1,900, Star with the third largest apparent size after R Doradus and the Sun. Only a few useful supergiant stars can be occulted by the Moon, including Antares A (Alpha Scorpii A).
Star with the second largest apparent size after the Sun. Great uncertainties remain with the membership and order of the list, especially when deriving various parameters used in calculations, such as stellar luminosity and effective temperature. V354 Cephei Colour and Temperature Based on the star's spectral type of M2.5 Iab, V354 Cephei's colour and type is red supergiant star.

[12] The carbon star AT Persei is listed as star 75 in another of the survey papers and is also known as Case 75. The spectrum is variable but apparently the luminosity is not. We don't have a space ship that can travel that distance or at that speed yet. The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,057,616,000.00.km. You can decline to give a name which if that is the case, the comment will be attributed to a random star. Despite it, larger sizes and luminosities have been published for few other galactic red supergiants, such as VV Cephei A and the peculiar star VY Canis Majoris at 1,200–1,900 R☉ and more than 3,000 R☉. This value was based on an angular diameter and distance of 2.9 kpc. V354 Cephei has a radius that is 1,520.00 times bigger than the Suns. Slightly smaller than WOH G64, this red hypergiant is 1,520 solar radii.

V354 Cephei: 685-1,520: L/T eff: KY Cygni: 672-1,420: L/T eff: 119 Tauri (CE Tauri) 587-593 (-608) AD: Can be occulted by the Moon, allowing accurate determination of its apparent diameter. V354 Cephei has an apparent magnitude of 10.82 which is how bright we see the star from Earth.

The supergiant companion of black hole Cygnus X-1. [7] There are similar differences in the visual extinctions derived, between two and six magnitudes.

Based on the spectral type (M2.5 Iab) of the star, the star's colour is red . Rhys Taylor/Stocktrek Images / Getty Images. The Right Ascension is how far expressed in time (hh:mm:ss) the star is along the celestial equator. Many extended supergiant atmospheres also significantly change in size over time, regularly or irregularly pulsating over several months or years as, Other direct methods for determining stellar radii rely on lunar, In this list are some examples of more distant extragalactic stars, which may have slightly different properties and natures than the currently largest-known stars in the, AD: radius determined from angular diameter and distance, DSKE: radius calculated using the disk emission, EB: radius determined from observations of the eclipsing binary, This page was last edited on 19 October 2020, at 18:14. Angular diameter measurements can be inconsistent because the boundary of the very tenuous atmosphere (opacity) differs depending on the wavelength of light in which the star is observed. Various complex issues exist in determining accurate radii of the largest stars, which in many cases do display significant errors. Older estimates have given up to 2,440. The star can not be seen by the naked eye, you need a telescope to see it. V509 Cassiopeiae: 400–900: AD: Yellow hypergiant, one of the rarest types of a star. There's no register feature and no need to give an email address if you don't need to. ", "On the Six-year Period in the Radial Velocity of Antares A", "Multi-component absorption lines in the HST spectra of alpha Scorpii B", "The second reddest star in the sky – 119 Tauri, CE Tauri", "The hypergiant HR 8752 evolving through the yellow evolutionary void". Often stellar radii can only be expressed as an average or within a large range of values.

Stellar radii or diameters are usually derived only approximately using. The following lists are generally based on various considerations or assumptions; these include: "On the Granulation and Irregular Variation of Red Supergiants", "The atmospheric structure and fundamental parameters of the red supergiants AH Scorpii, UY Scuti, and KW Sagittarii", "Resolving the dusty torus and the mystery surrounding LMC red supergiant WOH G64", Monthly Notices of the Royal Astronomical Society, "The possible disappearance of a massive star in the low metallicity galaxy PHL 293B", "Luminosities and mass-loss rates of Local Group AGB stars and Red Supergiants", "Late‐Type Red Supergiants: Too Cool for the Magellanic Clouds? Other methods can use lunar occultations or from eclipsing binaries, which can be used to test indirect methods of finding stellar radii. During the, ε Aurigae was incorrectly claimed in 1970 as the largest star with a size between 2,000, Formerly a candidate for the most luminous star in the, Also on record as the most massive and luminous star known (315.

What is the Biggest Star in the Universe?

It would take a spaceship 9,000.00 years travelling at the speed of light to get there. [13], V354 Cephei is near the Cepheus OB1 stellar association and considered a likely member. The V indicates that the star is a variable star and its position in the catalog (General Catalog of Variable Stars). [9], V354 Cephei is assumed to be part of the Cep OB1 association, which has an adopted, Centre de données astronomiques de Strasbourg, https://en.wikipedia.org/w/index.php?title=V354_Cephei&oldid=982792043, Creative Commons Attribution-ShareAlike License, This page was last edited on 10 October 2020, at 11:08. Based on the star's spectral, the stars temperature is between 2,400.00 and 3,700.00 degrees kelvin. Brightest red supergiant in the night sky. https://en.wikipedia.org/w/index.php?title=List_of_largest_stars&oldid=984359266, Wikipedia indefinitely semi-protected pages, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License, Located within close proximity of the massive, Not to be confused with Mu Cephei (see below). [14][a] Its Gaia Data Release 2 parallax is 0.4581±0.1023 mas,[6] implying a much smaller distance of around 2,000 pc. [15] The Gaia result carries a significant statistical margin of error, as well as an indicator that the astrometric excess noise is far beyond acceptable levels so that the parallax should be considered unreliable. Apparent Magnitude is also known as Visual Magnitude. With an average magnitude of +5.0, it's a magnitude fainter than Mu Cephei. [3][4], A 2005 study led by Levesque described the four red supergiant stars, KW Sagittarii, V354 Cephei, KY Cygni and Mu Cephei as the largest and most luminous galactic red supergiants with radii of roughly 1,500 R☉ and bolometric luminosity of roughly 300,000 L☉, which is consistent with the empirical upper radius and luminosity boundary for the red supergiants. This association is at a distance of approximately 3,500 parsecs. Based on the star's spectral type of M2.5 Iab , V354 Cephei's colour and type is red supergiant star. In astronomical terms, Mu Cephei doesn't have long to live. For V354 Cephei, the location is 22h 33m 34.6 and 58° 53` 47.05 .

It is an irregular variable located approximately 9,000 light-years away from the Sun. V354 Cephei, based on a MARCS model, was found to be the largest and most luminous of these four stars measured, with a high luminosity of 369,000 L☉ and consequently very large size of 1,520 R☉ based on the assumption of an effective temperature of 3,650 K.[5], Newer calculations of the luminosity of V354 Cep determined the luminosity of the star to be somewhat much lower, below 80,000 L☉, which implies much smaller sizes below 690 R☉. Based on the spectral type, we can deduce that the surface temperature of the star is in the order of between below 3,500K based on the notes from Harvard University. V354 Cephei Radius has been calculated as being 1,520.00 times bigger than the Sun. Cookies / About Us / Contact Us / Twitter / Facebook. It was included on a 1947 Dearborn Observatory survey as star 41575, but that ID is hardly ever used.
V354 Cephei is identified as a red supergiant variable star and included on surveys such as IRAS and 2MASS, but prior to its inclusion in the General Catalogue of Variable Stars in 1981, it was referred to only by its listings on relatively obscure catalogs. [6], The properties of V354 Cephei are disputed, but the star is classed as a cool supergiant star with a spectral and luminosity class given as M2.5 Iab, indicating it is an intermediate-size luminous supergiant, but was later given as M3.5 Ib, indicating it is rather a less luminous supergiant.

[10] It is too faint to be included in catalogs such as the Henry Draper Catalogue or Bonner Durchmusterung. It has almost certainly stopped internal hydrogen fusion, and is likely fusing helium into carbon. The SIMBAD astronomical portal prefers to restrict that usage to AT Persei and has devised a different unique acronym for V354 Cephei. Used to be described as the largest known star based on a radius of 1,800–2,100, A disappearing luminous blue variable star located in the low metallicity galaxy.

Examples of eclipsing binaries are Epsilon Aurigae (Almaaz), VV Cephei, and V766 Centauri (HR 5171). V354 Cephei V354 Cephei is a red supergiant star located within the Milky Way. All messages will be reviewed before being displayed. The black hole is around 500,000 times smaller than the star. [7][9] A 2011 study notes the discrepancy but is unable to explain it. The properties of V354 Cephei are disputed, but the star is classed as a cool supergiant star with a spectral and luminosity class given as M2.5 Iab, indicating it is an intermediate-size luminous supergiant, but was later given as M3.5 Ib, indicating it is rather a less luminous supergiant. Below is a list of the largest stars currently known, ordered by radius.

It has an estimated radius of 685 solar radii (477,000,000 km; 3.19 au). A V354 Cephei egy vörös szuperóriás csillag a Tejútrendszerben, a Cepheus csillagképben.Ez egy szabálytalan változó, ami körülbelül 9000 fényévnyire található a Naptól, és jelenleg ezt tartják az egyik legnagyobb ismert csillagnak.Becslések szerint az átmérője 1520-szorosa a Napénak, vagy 1 060 000 000 km.


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