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NML Cygni or V1489 Cygni (abbreviated to NML Cyg or V1489 Cyg) is a red hypergiant [4] or red supergiant (RSG) in the constellation Cygnus.It is possibly one of the largest known stars currently known, and is also possibly one of the most luminous and massive cool hypergiants, as well as one of the most luminous stars in the Milky Way.
UY Scuti: 909 [23] L/T eff: Initially reported 1,708 R ☉, making it the largest star, a 2023 measurement put the radius at a smaller value of 909 R ☉ based on the multimessenger monitoring of supernovae. [23] NR Vulpeculae: 908 [23] – 923 +62 −50 [25] L/T eff: KU Andromedae (IRC +40004) 900 [55] – 1,044 [54] L/T eff: V774 Sagittarii ...
UY Scuti (BD-12°5055) is a red supergiant star, located 5,900 light-years away in the constellation Scutum. It is also a pulsating variable star , with a maximum brightness of magnitude 8.29 and a minimum of magnitude 10.56, which is too dim for naked-eye visibility.
Recently, UY Scuti has been removed from the list by User:Ysku.It is a move that I support, as its distance estimates are unreliable. He also moved NML Cygni back up from 1,183 RSOL to 1,639 RSOL.
31 and 32 Cygni; Psi 1 Aurigae; 119 Tauri; Mira was historically thought to be a red supergiant star, but is now widely accepted to be an asymptotic giant branch star. [32] Some red supergiants are larger and more luminous, with radii exceeding over a thousand times that of the Sun. These are hence also referred to as red hypergiants: Mu Cephei ...
If NML Cygni's estimate would be 1642-2775, It might as well be placed above UY Scuti since VV Cephei A surpassed VY Canis Majoris by also using 1050-1900 instead of only one estimate. VV Cephei A was higher than VY CMa because 1050-1900 is 1475 so NML Cygni would be larger than UY Scuti because 1642-2775 is 2208.5 (3,075,742,614 Km) and UY ...
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NML Cyg is calculated to be between 1,640 R ☉ and 2,770 R ☉ based on a more accurate measure of its distance combined with assumptions of its temperature. [ 19 ] HD 90587