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Type TDE Supernova

The Story of Supernova TDE2022dsb

An extraordinary stellar explosion that occurred 326.9 Million Light-Years away in deep space.

⏱️ ~6 min deep read 🔬 24 Astrophysical Q&As 🔭 Viewing Guide Included 🪐 Constellation Libra
🔭 Deep Field (~2.1′ FOV) · DSS2 Optical (China-VO mirror)
● TDE2022dsb Explosion Site

High-magnification deep optical view into TDE2022dsb's host environment. Pan and scroll to explore the cosmic neighborhood where this star exploded.

⚡ Quick Observer Facts & Telemetry

IAU Transients DB
🌐 Distance to Earth
326.9 Million Light-Years
Lookback Cosmic Time
✨ Peak Brightness
Mag —
Research Scope
☀️ Peak Radiance
Hundreds of Millions of Suns
Combined Stellar Energy
🚀 Shock Velocity
Not measured
No spectral ejecta velocity
🌌 Host Galaxy
Field Transient Host
Center Coincident
🧭 Constellation
Libra
The Scales
💥 Explosion Physics
Type TDE
Core-Collapse Supergiant
📅 Discovered On
2022/03/01
K. Z. Stanek, C. S. Kochanek, for the ASAS-SN team
CHAPTER I

A Core-Collapse Class Transient

On 2022/03/01, astronomers scanning the heavens flagged a sudden, violent pinpoint of light that had flared into visibility. Designated TDE2022dsb, it represents a catastrophic stellar explosion classified as a Type TDE supernova.

TDE2022dsb 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 TDE2022dsb.

Astrophysical Mechanism Summary
Type: Type TDE • Progenitor: Massive Red/Stripped Supergiant Star • Velocity: Not measured
CHAPTER II

A Message Across Deep Cosmic Time

TDE2022dsb has a luminosity distance of approximately 326.9 Million Light-Years (redshift z = 0.023). That figure is not the light-travel time: under flat ΛCDM the lookback time is ≈316 Myr, when the light set out 316.0 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.

CHAPTER III

Brightness Record

No calibrated peak magnitude is published for TDE2022dsb, 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.

CHAPTER IV

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 TDE light curves; an object-specific nickel mass for TDE2022dsb 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.

CHAPTER V

Cosmic Kiln: Seeding the Elements of Life

Supernovae enrich galaxies with heavy elements. Events of TDE2022dsb'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 TDE2022dsb.

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.

CHAPTER VI

Galactic Setting in Libra

No host galaxy is identified for TDE2022dsb in this catalog record . In our terrestrial sky, it resides in the constellation Libra (The Scales) at Right Ascension 15:42:21.743 and Declination -22:40:14.04.

CHAPTER VII

The Scientific Surveillance Campaign

Following its discovery by K. Z. Stanek, C. S. Kochanek, for the ASAS-SN team, observatories worldwide swung their lenses toward TDE2022dsb. In the sne.space, TDE2022dsb 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.

CHAPTER VIII

Stargazer's Field Guide: Can You See It Tonight?

Can I see it tonight? Unknown — no measured brightness.

Discovered 4.7 years ago (2022/03/01). No reliable current brightness estimate — no photometry has been published.

Planetary Safety Note: Even though TDE2022dsb was a titanic explosion, our planet sits safely outside the lethal 50–100 light-year kill zone. At a distance of 326.9 Million Light-Years, the blast poses zero physical hazard to Earth's biosphere.

🌌 Cosmic Neighbors & Contemporaries 105,868+ transients indexed

Cataloged transients closest to TDE2022dsb in discovery time, spatial sky neighborhood, and cosmological redshift:

⏱️ Closest in Time
ASASSN-22cu Exploded same day
Type Transient 2022/03/01 · Mag 17.5
AT2022drr Exploded same day
Type Candidate 2022/03/01 · Mag 18.48
AT2022aerd Exploded same day
Type AGN 2022/03/01
🔭 Closest on the Sky
Gaia19eky 43.2′ away
Type Candidate Discovered 2019/09/19
SN2025gjc 47.0′ away
Type II Discovered 2025/04/01
Gaia18aia 47.9′ away
Type Candidate Discovered 2018/01/30
🌌 Same Cosmic Era (Redshift)
SN1991bk z = 0.023
Type Transient ~315.1 Mly (approx.)
SN1997C z = 0.023
Type Ia ~315.1 Mly (approx.)
SN1996bq z = 0.023
Type Transient ~315.1 Mly (approx.)

❓ Frequently Asked Questions About TDE2022dsb

Scientific & observational Q&As indexed from astronomical databases & the sne.space
🔍 24 of 24
What type of supernova is TDE2022dsb and what kind of star exploded? Astrophysics & Progenitor
TDE2022dsb is classified as a tidal disruption event (TDE): a star was torn apart by a supermassive black hole's tidal field. This is not a stellar core-collapse or thermonuclear supernova; radioactive ⁵⁶Ni-powered light-curve models for supernovae do not apply by default.
What was the progenitor star doing in the millions of years leading up to TDE2022dsb? Astrophysics & Progenitor
The specific progenitor of TDE2022dsb has not been observed. Events of this spectroscopic class are generally associated with massive-star core collapse after successive nuclear burning stages (hydrogen → helium → carbon → neon → oxygen → silicon → iron). Typical lifetimes of such progenitors are tens of millions of years, but that is a class expectation—not a measured age or evolutionary track for this star. No pre-explosion imaging identification is cited in the available record for TDE2022dsb.
How far away is TDE2022dsb from Earth and how old is the light reaching us? Cosmic Distance & Time
TDE2022dsb has a luminosity distance of approximately 326.9 Million Light-Years (redshift z = 0.023, d_L = 100.24). Under a flat ΛCDM cosmology (H₀≈70 km/s/Mpc, Ωₘ≈0.3), the corresponding lookback time is ≈316 Myr — when the light set out 316.0 million years ago during the Paleozoic era, long before the first dinosaurs appeared on Earth. Luminosity distance is larger than the light-travel distance because cosmic expansion stretches the path; the two must not be equated.
What does the cosmological redshift of TDE2022dsb tell us about the expansion of space? Cosmic Distance & Time
TDE2022dsb exhibits a measured spectroscopic redshift of z = 0.0230. The cockpit reports a user-facing recession velocity of 6,816.0 km/s, computed as the redshift Doppler-equivalent v = c·((1+z)²−1)/((1+z)²+1). Cosmological redshift is not generally equivalent to special-relativistic motion through space; this number is a convenient velocity label for z, not a measured peculiar velocity and not supernova ejecta speed. Bare c·z (≈6,895 km/s) is a different low-z approximation and is not mixed here.
How bright did TDE2022dsb become at its peak, and how many Suns does that equal? Explosion Energetics
The peak brightness of TDE2022dsb is not recorded. No peak apparent magnitude and no calibrated photometry are published for this transient, so neither its apparent brightness nor its intrinsic luminosity can be stated. Any figure quoted here would be an estimate from a template rather than a measurement of this object. Follow-up photometry would establish the light curve and the peak.
How much total energy was released by TDE2022dsb, and where did that energy go? Explosion Energetics
No object-specific energy budget is published for TDE2022dsb. Tidal disruption events are powered by accretion onto a supermassive black hole, not by the neutrino burst or ⁵⁶Ni decay that dominate supernova energy discussions. Class-scale estimates must not be quoted as measurements of this event.
How fast are the supernova ejecta and shockwave of TDE2022dsb expanding through space? Explosion Energetics
No ejecta velocity is measured for TDE2022dsb. Blast-wave speed is obtained from Doppler shifts of spectral absorption features (e.g. Si II λ6355 for Type Ia), not from cosmological redshift. Any recession velocity derived from z describes Hubble flow, not the explosion debris.
What powers the prolonged glow of TDE2022dsb weeks and months after detonation? Radioactive Engine
Radioactive ⁵⁶Ni decay is not the default power source for TDE2022dsb. As a tidal disruption event, the optical light curve is generally discussed in terms of accretion and circularization physics, not the supernova ⁵⁶Ni → ⁵⁶Co → ⁵⁶Fe chain. No object-specific nickel mass applies.
What chemical elements did TDE2022dsb create and disperse into the universe? Nucleosynthesis & Elements
TDE2022dsb is a TDE, not a nucleosynthesis factory in the supernova sense. Observed abundances reflect debris from the disrupted star and accretion-flow physics; no supernova-style elemental yield is published for this object.
Did TDE2022dsb leave behind a black hole, a neutron star, or nothing at all? Cosmic Remnant
A core-collapse explosion associated with TDE2022dsb's class forges an ultra-dense compact stellar remnant at the center of the detonation. If the progenitor had an initial mass under ~20 solar masses, it left behind a neutron star (pulsar)—packing the mass of our entire Sun into a city-sized sphere barely 20 kilometers wide, spinning dozens or hundreds of times per second. If the progenitor exceeded ~25–30 solar masses, gravity overcame neutron degeneracy pressure, creating a permanent stellar-mass black hole.
What will TDE2022dsb's explosion site look like in 1,000 to 10,000 years? Cosmic Remnant
Supernova remnants in general evolve through free-expansion, Sedov–Taylor, and radiative phases over centuries to millennia, sometimes becoming bright X-ray shells and occasionally compressing nearby molecular clouds. These are standard remnant-evolution models, not forecasts measured for TDE2022dsb. Whether this site will trigger star formation, reach particular X-ray temperatures, or match Cassiopeia A depends on local density and magnetic field—none of which are constrained by the data shown here.
In which galaxy did TDE2022dsb explode, and where is it located relative to the galactic center? Galactic Environment
No host galaxy is identified for TDE2022dsb in this catalog record. A blank host field means the association is unresolved here—it does not establish that the host is uncataloged, resolved in imaging, or securely linked by astrometry. Possible states (unidentified, hostless candidate, imaging detection without a catalog name, or a securely matched cataloged galaxy) require separate evidence that is not present in this field.
Where is TDE2022dsb located in the night sky and which constellation is it in? Sky Coordinates
In the celestial sphere, TDE2022dsb is located at Right Ascension 15:42:21.743 and Declination -22:40:14.04, situated in the constellation Libra (The Scales). Because its declination is -22:40:14.04, it is favorably placed for Southern Hemisphere observatories.
How much Milky Way interstellar dust obscures our view of TDE2022dsb? Interstellar Dust
Along this line of sight, the catalog records a Milky Way foreground color excess of E(B−V) = 0.0749 mag (source: Analytical Galactic Disk Model (IAU)), corresponding to roughly A_V ≈ 0.23 mag for R_V = 3.1. Band-specific corrections (e.g. A_r) differ from A_V and should be applied when available. Map-based values (IRSA / Schlafly & Finkbeiner 2011) must not be claimed unless that map was actually queried.
Across which photometric filter bands was TDE2022dsb monitored? Astronomical Observations
No calibrated photometry is published for TDE2022dsb. Without multi-epoch flux measurements, neither a light curve nor a peak magnitude can be established. Follow-up imaging from survey alert streams would be required to map its brightness evolution.
What did astronomical spectroscopy reveal about TDE2022dsb's chemical makeup? Astronomical Observations
No spectrum has been published for TDE2022dsb. Without spectroscopy, its chemical composition, expansion velocity, and physical classification cannot be established. Classification spectra from follow-up observatories would be required to identify diagnostic absorption and emission lines.
Who discovered TDE2022dsb and how was it first detected? Discovery & History
TDE2022dsb was officially reported on 2022/03/01 by K. Z. Stanek, C. S. Kochanek, for the ASAS-SN team. Discoveries are typically flagged by high-cadence robotic survey telescopes (such as ATLAS, ZTF, Pan-STARRS, ASAS-SN, or Gaia) and worldwide amateur astronomers scanning the night sky, followed by rapid spectroscopic classification by international observatories.
How many scientific publications and observatories have contributed data to TDE2022dsb? Scientific Research
Data for TDE2022dsb are compiled from international astronomical notices, the IAU Transient Name Server (TNS), and peer-reviewed astrophysical journals.
What other names and survey identifiers exist for TDE2022dsb? Cross-Identifications
Throughout global alert streams and survey databases, TDE2022dsb has also been designated as: 2022dsb, ATLAS22iav, ASASSN-22cs, ZTF22aadghqe. 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).
How does TDE2022dsb contribute to measuring the Hubble Constant and the scale of the cosmos? Cosmology & Distance Ladder
TDE2022dsb cannot currently be used for cosmological distance work because its classification is unresolved. The distance ladder relies on type-specific techniques: Type Ia supernovae use the Phillips relation between peak absolute magnitude and decline rate, while Type II events use the Expanding Photosphere Method or SCM-II. An unclassified transient fits neither, so no Hubble-constant constraint can be derived from it until a spectrum establishes its type.
Could gravitational waves or neutrinos from TDE2022dsb be detected on Earth? Multi-Messenger Astronomy
No neutrino or gravitational-wave counterpart has been reported for TDE2022dsb, and none is expected to be identifiable without a classification. The multi-messenger signature differs sharply by type: core-collapse events emit a neutrino burst at shock breakout (detected once, for SN 1987A), while thermonuclear Type Ia events produce negligible neutrinos and gravitational waves. Searching for a counterpart before knowing which mechanism applies would be unfocused.
How does TDE2022dsb compare to famous historical supernovae like SN 1987A or the Crab Supernova? Historical Comparison
Compared to historical landmarks like SN 1987A in the Large Magellanic Cloud (168,000 light-years away, naked-eye peak m = 2.9) or the Crab Supernova of 1054 (6,500 light-years away), TDE2022dsb occurred at a distance of 326.9 Million Light-Years. While historical naked-eye supernovae occurred within our Milky Way or its immediate satellites, modern discoveries like TDE2022dsb allow astrophysicists to probe diverse galactic environments, metallicities, and stellar populations across the broader universe.
Can I see TDE2022dsb tonight with a backyard telescope or binoculars? Backyard Observation
Unknown — no measured brightness. TDE2022dsb was discovered 1720 days ago (2022/03/01), but no calibrated photometry is published for it, so its current apparent magnitude cannot be stated. Without a magnitude there is no basis for a telescope-aperture recommendation. Use the coordinates and airmass chart above to plan a follow-up observation and report what you measure.
Does the radiation or shockwave from TDE2022dsb pose any threat to Earth? Planetary Safety
No, Earth is in zero danger. Supernovae are violent events emitting powerful gamma rays, X-rays, and cosmic rays; however, the astrophysical 'lethal kill zone' for our planet's protective ozone layer is estimated at 50 to 100 light-years. At a distance of 326.9 Million Light-Years, the inverse-square law dilutes the radiation by quintillions of times, making TDE2022dsb completely harmless to our biosphere and purely a fascinating spectacle for human exploration.
Data sourced from IAU TNS, ALeRCE, WISeREP, and the sne.space. View All General Astrophysics FAQs →
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