Host Optical Cutout
0.26″/pix
DESI DR10 Optical (0.26″/pix)
Core Parameters
| R.A. (J2000) | 04:20:07.952 (65.03313°) |
|---|---|
| Dec. (J2000) | -21:22:59.19 (-21.38311°) |
| Spectral Type | |
| Redshift (z) | 0.072 |
| Recession Velocity | 20,810 km/s (redshift Doppler-equivalent) |
| Luminosity Distance | 325.13 Mpc (~1060.4 Million Light-Years, μ = 37.56) |
| Peak Apparent Mag | 18.95 brightest multi-epoch detection (2026/10/28) |
| Peak Absolute Mag | -18.61 mag (-18.76 mag (A_V corrected)) |
| MW Dust E(B-V) | 0.0490 mag (AV = 0.15 mag) derived from galactic coordinates (Analytical Galactic Disk Model (IAU)), not a dust-map measurement |
| Host Galaxy | — |
| Host Offset | — |
| Observations | 2 detections, 3 upper limits, 1 spectra |
Interactive Sky Field (Aladin) ✨ DSS2 Optical (China-VO mirror)
🎯 04:20:07.952 -21:22:59.19
FOV: 0.15°
● SN2026agzp ()
Coordinate Pointing & Airmass
Discovered 2 days ago (2026/10/28). Cataloged peak 2026/10/28 (2d ago; rest-frame phase +1.9d). Cataloged/observed peak: m = 18.95 on 2026/10/28. Latest observed: m = 19.06 on 2026/10/29 (MJD 61342.5). No reliable current brightness estimate — no event-specific brightness fit with documented uncertainty is published for this object. Class-average decay templates are not used as object-specific predictions. Latest observed magnitude: m = 19.06 on 2026/10/29 (MJD 61342.5). Published upper limits (nondetections) exist in the photometry record. Current brightness trend is unknown (last observation 2026/10/29 (MJD 61342.5); same-band recent pair unavailable or stale). Use the window below to plan observations tonight.
Multi-Band Light Curve
|
Calibrated Spectra Viewer
🌌 Cosmic Neighbors & Contemporaries
105,768+ transients indexed
Cataloged transients closest to SN2026agzp in discovery time, spatial sky neighborhood, and cosmological redshift:
⏱️ Closest in Time
SN2026aeiv
23d before
Type Ia-91T-like
2026/10/05
SN2026aedv
26d before
Type Ia
2026/10/02
SN2026aebj
26d before
Type Ia
2026/10/02
Literature & Data Provenance
| ID | Source | Reference | NASA ADS Bibcode |
|---|---|---|---|
| [1] | Transient Name Server | — | |
| [2] | 2026TNSTR4315....1R | GOTO_bot | 2026TNSTR4315....1R |
| [3] | The Open Supernova Catalog | Guillochon et al. (2017) | 2017ApJ...835...64G |
| [4] | ALeRCE / ZTF | — |
❓ Frequently Asked Questions About SN2026agzp
Scientific & observational Q&As indexed from astronomical databases & the Open Supernova Catalog
What type of supernova is SN2026agzp and what kind of star exploded? Astrophysics & Progenitor
SN2026agzp has not been spectroscopically classified. It was reported as an astronomical transient, which means an object was detected changing in brightness, but its nature is not yet established. Classification requires a spectrum: the presence or absence of hydrogen lines separates Type II from Type I, and Type Ia is identified by silicon absorption near 6150 Å combined with the absence of hydrogen. Until such a spectrum is published, claims about the progenitor star or explosion mechanism would be speculation. Check the sources below for follow-up spectroscopy.
What was the progenitor star doing in the millions of years leading up to SN2026agzp? Astrophysics & Progenitor
The progenitor of SN2026agzp cannot be identified without a classification. Stellar evolutionary history depends entirely on the explosion type: a Type Ia event would require a carbon-oxygen white dwarf in a binary system, whereas a core-collapse event would require a massive star exhausting its fuel within tens of millions of years. These are mutually exclusive histories that produce different spectra and light curves. No progenitor or precursor has been reported for this transient in the available literature.
How far away is SN2026agzp from Earth and how old is the light reaching us? Cosmic Distance & Time
SN2026agzp has a luminosity distance of approximately 1060.4 Million Light-Years (redshift z = 0.072, d_L = 325.13 Mpc). Under a flat ΛCDM cosmology (H₀≈70 km/s/Mpc, Ωₘ≈0.3), the corresponding lookback time is ≈955 Myr — when the light set out 955.4 million years ago during the Neoproterozoic, hundreds of millions of years before complex animal life diversified. 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 SN2026agzp tell us about the expansion of space? Cosmic Distance & Time
SN2026agzp exhibits a measured spectroscopic redshift of z = 0.0720. The cockpit reports a user-facing recession velocity of 20,809.9 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 (≈21,585 km/s) is a different low-z approximation and is not mixed here.
How bright did SN2026agzp become at its peak, and how many Suns does that equal? Explosion Energetics
At peak brightness, SN2026agzp achieved an apparent magnitude of 18.95 around 2026/10/28. Corrected for cosmic distance and foreground interstellar dust, its intrinsic absolute magnitude was -18.61 mag. At this peak, the exploding star radiated with the incandescent brilliance of approximately 2.4 billion Suns combined, briefly outshining the cumulative starlight of entire dwarf galaxies!
How much total energy was released by SN2026agzp, and where did that energy go? Explosion Energetics
The total energy released by SN2026agzp is unknown. Energy budgets differ by orders of magnitude depending on mechanism: a thermonuclear Type Ia liberates ~10⁵¹ ergs mostly as kinetic energy, while a core-collapse event liberates ~10⁵³ ergs of which ~99% escapes as neutrinos. Without a spectroscopic classification, neither figure applies to this transient.
How fast are the supernova ejecta and shockwave of SN2026agzp expanding through space? Explosion Energetics
No ejecta velocity is measured for SN2026agzp. 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 SN2026agzp weeks and months after detonation? Radioactive Engine
The power source sustaining SN2026agzp cannot be identified without a classification. Classified supernovae are typically powered after peak by the radioactive decay of ⁵⁶Ni → ⁵⁶Co → ⁵⁶Fe, but nickel yields and whether a shock-breakout flash occurred depend on the explosion mechanism. No spectrum is published for this transient, so no ⁵⁶Ni mass or decay-powered light-curve narrative applies.
What chemical elements did SN2026agzp create and disperse into the universe? Nucleosynthesis & Elements
The nucleosynthetic products of SN2026agzp are unknown because its type is unresolved. Element yields depend directly on the explosion mechanism: a thermonuclear Type Ia produces mostly iron-peak elements such as 56Ni and 56Fe, whereas a core-collapse event produces large quantities of oxygen, neon, magnesium and silicon from successive burning shells. No spectrum has been published for this transient, so which of these occurred is not established.
Did SN2026agzp leave behind a black hole, a neutron star, or nothing at all? Cosmic Remnant
Whether SN2026agzp left a remnant is unknown. A thermonuclear Type Ia leaves no compact remnant (the white dwarf is fully disrupted), whereas a core-collapse event leaves a neutron star or black hole depending on progenitor mass. Without a spectroscopic classification, none of these outcomes can be asserted for this transient.
What will SN2026agzp'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 SN2026agzp. 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 SN2026agzp explode, and where is it located relative to the galactic center? Galactic Environment
No host galaxy is identified for SN2026agzp 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 SN2026agzp located in the night sky and which constellation is it in? Sky Coordinates
In the celestial sphere, SN2026agzp is located at Right Ascension 04:20:07.952 and Declination -21:22:59.19, situated in the constellation Eridanus (The River). Because its declination is -21:22:59.19, it is favorably placed for Southern Hemisphere observatories.
How much Milky Way interstellar dust obscures our view of SN2026agzp? Interstellar Dust
Along this line of sight, the catalog records a Milky Way foreground color excess of E(B−V) = 0.0490 mag (source: Analytical Galactic Disk Model (IAU)), corresponding to roughly A_V ≈ 0.15 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 SN2026agzp monitored? Astronomical Observations
SN2026agzp was tracked across 5 photometric observations across a baseline of 14.1 days utilizing filter bands including
L-GOTO, g, r. Data were captured by observatories and survey networks including GOTO-S_GOTO-4, ZTF. Multi-color photometry tracks the temperature evolution of the fireball, verifying the rise time to peak and the rate of radioactive decline.What did astronomical spectroscopy reveal about SN2026agzp's chemical makeup? Astronomical Observations
Astronomers obtained 1 spectroscopic epochs for SN2026agzp from 3358.3 Å to 7478.1 Å by facilities including ESO-NTT. Optical spectroscopy provides the definitive physical fingerprint of the transient: P-Cygni line profiles reveal the expansion speed of the ejecta, while characteristic absorption features (such as hydrogen Balmer lines Hα/Hβ in Type II, or Si II λ6355 in Type Ia) identify the stellar composition and physical mechanism of the explosion.
Who discovered SN2026agzp and how was it first detected? Discovery & History
SN2026agzp was officially reported on 2026/10/28 by GOTO_bot. 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 SN2026agzp? Scientific Research
SN2026agzp is documented across 4 scientific references and archival data sources in the Open Supernova Catalog. These include discovery circulars and research datasets from Transient Name Server, 2026TNSTR4315....1R, The Open Supernova Catalog, ALeRCE / ZTF. All raw photometry and spectroscopy points are cross-indexed to their original bibliographic records for peer-reviewed verification.
What other names and survey identifiers exist for SN2026agzp? Cross-Identifications
Throughout global alert streams and survey databases, SN2026agzp has also been designated as:
2026agzp, GOTO26llc, AT2026agzp, SN 2026agzp, ZTF26acdjtir. 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 SN2026agzp contribute to measuring the Hubble Constant and the scale of the cosmos? Cosmology & Distance Ladder
SN2026agzp 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 SN2026agzp be detected on Earth? Multi-Messenger Astronomy
No neutrino or gravitational-wave counterpart has been reported for SN2026agzp, 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 SN2026agzp 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), the distance to SN2026agzp is not established for a historical comparison (unclassified; redshift z = 0.072 is published but no luminosity distance is derived). While historical naked-eye supernovae occurred within our Milky Way or its immediate satellites, modern discoveries like SN2026agzp allow astrophysicists to probe diverse galactic environments, metallicities, and stellar populations across the broader universe.
Can I see SN2026agzp tonight with a backyard telescope or binoculars? Backyard Observation
Unknown — no measured brightness. SN2026agzp was discovered 2 days ago (2026/10/28), 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 SN2026agzp 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 1060.4 Million Light-Years, the inverse-square law dilutes the radiation by quintillions of times, making SN2026agzp completely harmless to our biosphere and purely a fascinating spectacle for human exploration.
Data sourced from IAU TNS, ALeRCE, WISeREP, and the Open Supernova Catalog.
View All General Astrophysics FAQs →