High-magnification deep optical view into SNhunt436's host environment. Pan and scroll to explore the cosmic neighborhood where this star exploded.
⚡ Quick Observer Facts & Telemetry
IAU Transients DBAn Unclassified Astronomical Transient
On 2020/12/24, astronomers scanning the heavens flagged a sudden, violent pinpoint of light that had flared into visibility. Designated SNhunt436, it is an unclassified astronomical transient whose physical nature is not yet established.
SNhunt436 was reported as a changing source associated with PGC 1374835, but it has not been spectroscopically classified. Without a spectrum, the progenitor cannot be identified: a thermonuclear white-dwarf detonation and a core-collapse of a massive star are mutually exclusive histories that produce different spectra and light curves. No progenitor, explosion mechanism, or remnant outcome is established for this object.
A Message Across Deep Cosmic Time
SNhunt436 has a luminosity distance of approximately 426.3 Million Light-Years
(redshift z = 0.0289).
That figure is not the light-travel time: under flat ΛCDM the lookback time is ≈395 Myr, when the light set out 395.4 million years ago during the Paleozoic era, long before the first dinosaurs appeared on Earth.
Luminosity distance incorporates cosmic expansion and exceeds the light-travel distance. The two quantities must be reported separately.
Brightness Record
At the height of the outburst around 2020/12/23, SNhunt436 surged to a peak apparent magnitude of 20.3 and an intrinsic absolute magnitude of -15.25. At that instant, this single dying star radiated with the collective power of approximately 107.6 million Suns combined, outshining whole dwarf galaxies.
The total energy release is unknown without a spectroscopic classification.
The Radioactive Furnace: Why Supernovae Glow for Months
Without a classification, the power source of SNhunt436 cannot be identified; radioactive ⁵⁶Ni decay powers many supernovae but is not established for this transient.
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 SNhunt436'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 SNhunt436.
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 Taurus
SNhunt436 is associated with cataloged host PGC 1374835
.
In our terrestrial sky, it resides in the constellation Taurus (The Bull) at Right Ascension 04:36:00.288
and Declination +10:07:27.12.
The Scientific Surveillance Campaign
Following its discovery by CRTS, observatories worldwide swung their lenses toward SNhunt436. In the Open Supernova Catalog, SNhunt436 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 5.9 years ago (2020/12/24). No reliable current brightness estimate — no photometry has been published.
Planetary Safety Note: Even though SNhunt436 was a titanic explosion, our planet sits safely outside the lethal 50–100 light-year kill zone. At a distance of 426.3 Million Light-Years, the blast poses zero physical hazard to Earth's biosphere.
Cataloged transients closest to SNhunt436 in discovery time, spatial sky neighborhood, and cosmological redshift:
❓ Frequently Asked Questions About SNhunt436
What type of supernova is SNhunt436 and what kind of star exploded? Astrophysics & Progenitor
What was the progenitor star doing in the millions of years leading up to SNhunt436? Astrophysics & Progenitor
How far away is SNhunt436 from Earth and how old is the light reaching us? Cosmic Distance & Time
What does the cosmological redshift of SNhunt436 tell us about the expansion of space? Cosmic Distance & Time
How bright did SNhunt436 become at its peak, and how many Suns does that equal? Explosion Energetics
How much total energy was released by SNhunt436, and where did that energy go? Explosion Energetics
How fast are the supernova ejecta and shockwave of SNhunt436 expanding through space? Explosion Energetics
What powers the prolonged glow of SNhunt436 weeks and months after detonation? Radioactive Engine
What chemical elements did SNhunt436 create and disperse into the universe? Nucleosynthesis & Elements
Did SNhunt436 leave behind a black hole, a neutron star, or nothing at all? Cosmic Remnant
What will SNhunt436's explosion site look like in 1,000 to 10,000 years? Cosmic Remnant
In which galaxy did SNhunt436 explode, and where is it located relative to the galactic center? Galactic Environment
Where is SNhunt436 located in the night sky and which constellation is it in? Sky Coordinates
How much Milky Way interstellar dust obscures our view of SNhunt436? Interstellar Dust
Across which photometric filter bands was SNhunt436 monitored? Astronomical Observations
What did astronomical spectroscopy reveal about SNhunt436's chemical makeup? Astronomical Observations
Who discovered SNhunt436 and how was it first detected? Discovery & History
How many scientific publications and observatories have contributed data to SNhunt436? Scientific Research
What other names and survey identifiers exist for SNhunt436? Cross-Identifications
AT2020adnv. 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).