WR 25

WR 25 (HD 93162) is a binary star system in the turbulent star forming region Carina Nebula, about 6,800 light-years from Earth.wikipedia
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Wolf–Rayet star

Wolf-Rayet starWolf-RayetWolf-Rayet stars
It contains a Wolf-Rayet star and a hot luminous companion, and is a member of the Trumpler 16 cluster.

WR 102ka

Peony Star
An even more luminous yet closer star, WR 25, appears to be most likely to the title.

Binary star

spectroscopic binaryeclipsing binarybinary
WR 25 (HD 93162) is a binary star system in the turbulent star forming region Carina Nebula, about 6,800 light-years from Earth.

Carina Nebula

Eta Carinae NebulaNGC 3372Keyhole Nebula
WR 25 (HD 93162) is a binary star system in the turbulent star forming region Carina Nebula, about 6,800 light-years from Earth.

Trumpler 16

16
It contains a Wolf-Rayet star and a hot luminous companion, and is a member of the Trumpler 16 cluster.

Sun

solarSolThe Sun
The primary star of the WR 25 system is approximately 2.4 million times brighter than the Sun and illuminates the far southern end of the Trumpler 16 cluster.

Stellar wind

windwindssolar wind
Colliding stellar winds between two such hot luminous stars produce the hard X-rays that led to suspicion about the binary status long before the 208-day orbital period was detected.

Extinction (astronomy)

extinctionextinction factorinterstellar extinction
Although very luminous, WR 25 is beyond naked-eye visibility due to heavy dust extinction of clouds in the nebula, and because much of the emitted radiation is in the ultraviolet.

Ultraviolet

UVultraviolet lightultraviolet radiation
Although very luminous, WR 25 is beyond naked-eye visibility due to heavy dust extinction of clouds in the nebula, and because much of the emitted radiation is in the ultraviolet.

Carina OB1

CarinaCarina OB1-D
WR 25 lies at the western limit of the Trumpler 16 star cluster, part of Carina OB1, one of the largest stellar associations in the Milky Way Galaxy.

Stellar kinematics

runaway starspace velocitymoving group
WR 25 lies at the western limit of the Trumpler 16 star cluster, part of Carina OB1, one of the largest stellar associations in the Milky Way Galaxy.

Finger of God (Carina)

Finger Nebula
Because of its extreme luminosity it greatly affects its stellar environment, seen in the thin long arcs and filaments moving away from the star, including the Finger Nebula.

HD 93129

HD 93129AHD 93129 AHD 93129 B
It is the dominant member of the Trumpler 14 star cluster, a young star cluster within the Carina OB1 stellar association that harbors other super luminous stars, like Eta Carinae and WR 25.

List of most luminous stars

most luminousmost luminous starsmost luminous stars known

Eta Carinae

η Carinaeη CarEta Carinae A
All the other members are well below naked eye visibility, although WR 25 is another extremely massive luminous star.