Host Optical Cutout
0.26″/pix
DESI DR10 Optical (0.26″/pix)
Core Parameters
| R.A. (J2000) | 05:34:31 (83.62917°) |
|---|---|
| Dec. (J2000) | +22:01 (22.01667°) |
| Spectral Type | CC |
| Redshift (z) | — |
| Recession Velocity | — |
| Luminosity Distance | 0.0019 Mpc |
| Peak Apparent Mag | -4 brightest multi-epoch detection (1054/07/27) |
| Peak Absolute Mag | -15.4 |
| MW Dust E(B-V) | 0.2486 mag (AV = 0.77 mag) derived from galactic coordinates (Analytical Galactic Disk Model (IAU)), not a dust-map measurement |
| Host Galaxy | Milky Way |
| Host Offset | — |
| Observations | 2 detections, 0 spectra |
Interactive Sky Field (Aladin) ✨ DSS2 Optical (China-VO mirror)
🎯 05:34:31 +22:01
FOV: 0.15°
● SN1054A (CC)
Coordinate Pointing & Airmass
Discovered 972.3 years ago (1054/07/04). Cataloged peak 1054/07/27 (355125d ago; rest-frame phase +355125.0d). Cataloged/observed peak: m = -4.00 on 1054/07/27. Latest observed: m = 5.00 on 1056/04/16 (MJD -293139.0). 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 = 5.00 on 1056/04/16 (MJD -293139.0). Current brightness trend is unknown (last observation 1056/04/16 (MJD -293139.0); same-band recent pair unavailable or stale). It is below the horizon right now; use the window below to find the next observable slot.
Multi-Band Light Curve
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Calibrated Spectra Viewer
🌌 Cosmic Neighbors & Contemporaries
105,868+ transients indexed
Cataloged transients closest to SN1054A in discovery time, spatial sky neighborhood, and cosmological redshift:
⏱️ Closest in Time
SN1572A
+189321d after
Type I
1572/11/06 · Mag -4
SN393A
241552d before
Type CC
393/02/27 · Mag -1
SN386A
244047d before
Type CC
386/04/30 · Mag 1.5
🔭 Closest on the Sky
AT2020acfi
0.4′ away
Type Candidate
Discovered 2020/09/16
GRB 910718B
1.08° away
Type LGRB
Discovered 1991/07/18
PS1-14uo
1.15° away
Type Transient
Discovered 2014/03/19
🌌 Same Cosmic Era (Redshift)
No redshift match available (target z missing or no comparable redshifts in index).
Literature & Data Provenance
| ID | Source | Reference | NASA ADS Bibcode |
|---|---|---|---|
| [1] | 2014BASI...42...47G | Green (2014) | 2014BASI...42...47G |
| [2] | 1999PASP..111..871C | Collins, Claspy, & Martin (1999) | 1999PASP..111..871C |
| [3] | 1977hisu.book.....C | Clark & Stephenson (1977) | 1977hisu.book.....C |
| [4] | 1973PASP...85..579T | Trimble (1973) | 1973PASP...85..579T |
| [5] | 1969ApJ...157.1395O | Ostriker & Gunn (1969) | 1969ApJ...157.1395O |
| [6] | Galactic SNRs | — | |
| [7] | Transient Name Server | — | |
| [8] | WikiPedia | — | |
| [9] | Latest Supernovae | — | |
| [10] | The Open Supernova Catalog | Guillochon et al. (2017) | 2017ApJ...835...64G |
❓ Frequently Asked Questions About SN1054A
Scientific & observational Q&As indexed from astronomical databases & the sne.space
What type of supernova is SN1054A and what kind of star exploded? Astrophysics & Progenitor
SN1054A is cataloged as a Type CC transient. Mechanism-specific claims (progenitor mass, nickel yield, remnant type) require more than this label and are not asserted here as object-specific measurements.
What was the progenitor star doing in the millions of years leading up to SN1054A? Astrophysics & Progenitor
The specific progenitor of SN1054A 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 SN1054A.
How far away is SN1054A from Earth and how old is the light reaching us? Cosmic Distance & Time
SN1054A has a luminosity distance of approximately 0.0 Million Light-Years. A lookback time is not computed here without a usable redshift; do not interpret the luminosity-distance light-year figure as travel time.
What does the cosmological redshift of SN1054A tell us about the expansion of space? Cosmic Distance & Time
No spectroscopic redshift has been measured for SN1054A. Without a published z, its place in the Hubble flow, recession velocity, and lookback time cannot be stated. A redshift requires a spectrum (or a well-calibrated photometric redshift from multi-band imaging). Check the sources below for follow-up spectroscopy.
How bright did SN1054A become at its peak, and how many Suns does that equal? Explosion Energetics
At peak brightness, SN1054A achieved an apparent magnitude of -4 around 1054/07/27. Corrected for cosmic distance and foreground interstellar dust, its intrinsic absolute magnitude was -15.4. At this peak, the exploding star radiated with the incandescent brilliance of approximately 123.6 million Suns combined, briefly outshining the cumulative starlight of entire dwarf galaxies!
How much total energy was released by SN1054A, and where did that energy go? Explosion Energetics
Core-collapse events of this broad class are often discussed with a ~10⁵³ erg gravitational binding energy of which ~99% may escape as neutrinos—again a class scale, not a measured budget for SN1054A.
How fast are the supernova ejecta and shockwave of SN1054A expanding through space? Explosion Energetics
No ejecta velocity is measured for SN1054A. 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 SN1054A weeks and months after detonation? Radioactive Engine
Classified core-collapse light curves are often sustained after peak by radioactive ⁵⁶Ni → ⁵⁶Co → ⁵⁶Fe decay, with typical nickel yields of order 0.05–0.15 solar masses—again a class scale, not a measured yield for SN1054A. Shock-breakout heating may dominate the earliest optical flash; without a published bolometric fit, neither nickel mass nor the dominant power source is established for this event.
What chemical elements did SN1054A create and disperse into the universe? Nucleosynthesis & Elements
The nucleosynthetic products of SN1054A 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 SN1054A leave behind a black hole, a neutron star, or nothing at all? Cosmic Remnant
A core-collapse explosion associated with SN1054A'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 SN1054A'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 SN1054A. 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 SN1054A explode, and where is it located relative to the galactic center? Galactic Environment
SN1054A is cataloged with host galaxy Milky Way. No secure nuclear offset is published in this record.
Where is SN1054A located in the night sky and which constellation is it in? Sky Coordinates
In the celestial sphere, SN1054A is located at Right Ascension 05:34:31 and Declination +22:01, situated in the constellation Orion (The Hunter). Because its declination is +22:01, it is primarily placed in the Northern celestial hemisphere.
How much Milky Way interstellar dust obscures our view of SN1054A? Interstellar Dust
Along this line of sight, the catalog records a Milky Way foreground color excess of E(B−V) = 0.2486 mag (source: Analytical Galactic Disk Model (IAU)), corresponding to roughly A_V ≈ 0.77 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 SN1054A monitored? Astronomical Observations
SN1054A was tracked across 2 photometric observations across a baseline of 629.0 days utilizing filter bands including optical filters. Data were captured by observatories and survey networks including global optical observatories. 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 SN1054A's chemical makeup? Astronomical Observations
No spectrum has been published for SN1054A. 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 SN1054A and how was it first detected? Discovery & History
SN1054A was officially reported on 1054/07/04 by Chinese observers. 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 SN1054A? Scientific Research
SN1054A is documented across 10 scientific references and archival data sources in the sne.space. These include discovery circulars and research datasets from 2014BASI...42...47G, 1999PASP..111..871C, 1977hisu.book.....C, 1973PASP...85..579T. 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 SN1054A? Cross-Identifications
Throughout global alert streams and survey databases, SN1054A has also been designated as:
G184.6-05.8, MWSNR 184.6-05.8, Crab Nebula, 3C144, SN1054, M1. 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 SN1054A contribute to measuring the Hubble Constant and the scale of the cosmos? Cosmology & Distance Ladder
SN1054A 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 SN1054A be detected on Earth? Multi-Messenger Astronomy
No neutrino or gravitational-wave counterpart has been reported for SN1054A, 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 SN1054A 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), SN1054A occurred at a distance of 0.0 Million Light-Years. While historical naked-eye supernovae occurred within our Milky Way or its immediate satellites, modern discoveries like SN1054A allow astrophysicists to probe diverse galactic environments, metallicities, and stellar populations across the broader universe.
Can I see SN1054A tonight with a backyard telescope or binoculars? Backyard Observation
Unknown — no measured brightness. SN1054A was discovered 355148 days ago (1054/07/04), 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 SN1054A 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 0.0 Million Light-Years, the inverse-square law dilutes the radiation by quintillions of times, making SN1054A completely harmless to our biosphere and purely a fascinating spectacle for human exploration.
Data sourced from IAU TNS, ALeRCE, WISeREP, and the sne.space.
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