High-magnification deep optical view into B0540-693's host environment. Pan and scroll to explore the cosmic neighborhood where this star exploded.
⚡ Quick Observer Facts & Telemetry
IAU Transients DBA Core-Collapse Class Transient
On —, astronomers scanning the heavens flagged a sudden, violent pinpoint of light that had flared into visibility. Designated B0540-693, it represents a catastrophic stellar explosion classified as a Type CC supernova.
B0540-693 is classified in a core-collapse spectroscopic family. Events of this class are generally linked to the death of a massive star after successive nuclear burning stages, but no unique progenitor mass, lifetime, or pre-explosion identification is established for this object. The narrative of onion-shell fusion ending in iron-core collapse describes the class model, not a measured biography of B0540-693.
A Message Across Deep Cosmic Time
B0540-693 has a luminosity distance of approximately 163,110 Light-Years
(redshift z = 1.13e-05).
Lookback time is unavailable without a usable redshift; do not equate luminosity distance with travel time.
Luminosity distance incorporates cosmic expansion and exceeds the light-travel distance. The two quantities must be reported separately.
Brightness Record
No calibrated peak magnitude is published for B0540-693, so neither its apparent brightness nor an equivalent solar luminosity can be stated.
The total energy released by the cataclysm was on the order of 10⁵¹ to 10⁵³ ergs. Over 99% of this energy was emitted within the first 10 seconds as a dense burst of trillions of neutrinos, with only 1% driving the visible blast wave.
The Radioactive Furnace: Why Supernovae Glow for Months
After peak, many supernovae are powered by the radioactive chain ⁵⁶Ni → ⁵⁶Co → ⁵⁶Fe. That is the standard model for Type CC light curves; an object-specific nickel mass for B0540-693 is not published here.
Nickel-56 decays to Cobalt-56 (half-life ≈6.1 days), then to stable Iron-56 (half-life ≈77.2 days), heating the ejecta from within. Typical class yields must not be quoted as measured values for this event.
Cosmic Kiln: Seeding the Elements of Life
Supernovae enrich galaxies with heavy elements. Events of B0540-693's class are associated with oxygen-group and intermediate-mass products (O, C, Ne, Mg, Si) in galactic chemical-evolution models. No measured elemental yields are published for B0540-693.
As Carl Sagan observed, "We are made of star-stuff" — a statement about nucleosynthesis in general, not a claim that atoms from this specific remnant are identified in the Solar System.
Galactic Setting in Mensa
B0540-693 is associated with cataloged host LMC
.
In our terrestrial sky, it resides in the constellation Mensa (The Table Mountain) at Right Ascension 05:40:11
and Declination -69:19:55.
The Scientific Surveillance Campaign
Following its discovery by an automated sky survey, observatories worldwide swung their lenses toward B0540-693. In the Open Supernova Catalog, B0540-693 is documented across 0 photometric measurements and 0 spectroscopic epochs. These multi-wavelength observations allow astrophysicists to model the expanding photosphere, measure shock velocities, and probe circumstellar interactions.
Stargazer's Field Guide: Can You See It Tonight?
Can I see it tonight? Unknown — no measured brightness.
Discovered unknown epoch (unknown discovery date). No reliable current brightness estimate — no photometry has been published.
Planetary Safety Note: Even though B0540-693 was a titanic explosion, our planet sits safely outside the lethal 50–100 light-year kill zone. At a distance of 163,110 Light-Years, the blast poses zero physical hazard to Earth's biosphere.
Cataloged transients closest to B0540-693 in discovery time, spatial sky neighborhood, and cosmological redshift:
❓ Frequently Asked Questions About B0540-693
What type of supernova is B0540-693 and what kind of star exploded? Astrophysics & Progenitor
What was the progenitor star doing in the millions of years leading up to B0540-693? Astrophysics & Progenitor
How far away is B0540-693 from Earth and how old is the light reaching us? Cosmic Distance & Time
What does the cosmological redshift of B0540-693 tell us about the expansion of space? Cosmic Distance & Time
How bright did B0540-693 become at its peak, and how many Suns does that equal? Explosion Energetics
How much total energy was released by B0540-693, and where did that energy go? Explosion Energetics
How fast are the supernova ejecta and shockwave of B0540-693 expanding through space? Explosion Energetics
What powers the prolonged glow of B0540-693 weeks and months after detonation? Radioactive Engine
What chemical elements did B0540-693 create and disperse into the universe? Nucleosynthesis & Elements
Did B0540-693 leave behind a black hole, a neutron star, or nothing at all? Cosmic Remnant
What will B0540-693's explosion site look like in 1,000 to 10,000 years? Cosmic Remnant
In which galaxy did B0540-693 explode, and where is it located relative to the galactic center? Galactic Environment
Where is B0540-693 located in the night sky and which constellation is it in? Sky Coordinates
How much Milky Way interstellar dust obscures our view of B0540-693? Interstellar Dust
Across which photometric filter bands was B0540-693 monitored? Astronomical Observations
What did astronomical spectroscopy reveal about B0540-693's chemical makeup? Astronomical Observations
Who discovered B0540-693 and how was it first detected? Discovery & History
How many scientific publications and observatories have contributed data to B0540-693? Scientific Research
What other names and survey identifiers exist for B0540-693? Cross-Identifications
LMCSNR J054011-691955, MCSNR J0540-6920. These cross-matched identifiers allow astronomers to cross-reference observations across the Zwicky Transient Facility (ZTF), the Asteroid Terrestrial-impact Last Alert System (ATLAS), Pan-STARRS, Gaia Photometric Science Alerts, and the IAU Transient Name Server (TNS).