🔭 Deep Field (~2.1′ FOV) · DSS2 Optical (China-VO mirror)
● CSS140608:100655+301932 Explosion Site
High-magnification deep optical view into CSS140608:100655+301932'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
Millions of Light-Years
Lookback Cosmic Time
✨ Peak Brightness
Mag 19.3
Large Observatory
☀️ 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
Leo Minor
The Lesser Lion
💥 Explosion Physics
Type —
Core-Collapse Supergiant
📅 Discovered On
2014/06/08
CRTS
HISTORIC LANDMARK • MAY 1006 AD
The Brightest Stellar Event in Recorded Human History
In May 1006, a dazzling celestial explosion lit up the constellation Lupus. With an estimated peak apparent magnitude of −7.5 to −9.0, SN 1006 was bright enough to cast distinct shadows across the ground at night and was easily seen in the middle of the day for weeks. It remains the most luminous single stellar explosion ever witnessed by human eyes.
★ Landmark Dossier: SN 1006
Type: Thermonuclear Type Ia •
Distance: ~7,200 Light-Years (Lupus) •
Peak Apparent Magnitude: m ≈ −7.5 to −9.0 (Casting Visible Shadows) •
Historical Records: Ibn Sina (Avicenna), Chinese Dynastic Annals, St. Gallen Abbey (Switzerland)
Chroniclers from four continents left detailed accounts. In Baghdad and Persia, the famed polymath Ibn Sina (Avicenna) described the object as a temporary luminous monster that remained stationary for months, changing from pale green to white before fading. In Switzerland, monks at the Abbey of Saint Gall noted an immense dazzling light low on the southern horizon.
PHYSICAL NATURE & MODERN REMNANT
The Complete Obliteration of a White Dwarf
Modern X-ray and radio observations (Chandra, XMM-Newton) demonstrate that SN 1006 was a prototypical Type Ia thermonuclear supernova. An ultra-dense carbon-oxygen white dwarf exceeded the Chandrasekhar limit and was completely obliterated in a runaway nuclear fusion blast.
Because it detonated in an exceptionally clean, low-density region of the galactic halo (~7,200 light-years away in Lupus), the expanding shockwave has preserved a nearly spherical, pristine bubble spanning roughly 65 light-years across. The forward shock accelerates particles to relativistic speeds, providing a living laboratory for cosmic-ray shock acceleration.
CELESTIAL LOCATION
Coordinates in Lupus
In the night sky, the SN 1006 remnant is located at RA 10:06:55.22, Dec +30:19:31.7 in the constellation Lupus the Wolf.
It is favorably positioned for southern observatories, where narrowband [O III] and H-alpha filters reveal its delicate expanding filaments.
Can I see it tonight? Unknown — no measured brightness.
Discovered 12.4 years ago (2014/06/08). No reliable current brightness estimate — no photometry has been published.
🌌 Cosmic Neighbors & Contemporaries
105,868+ transients indexed
Cataloged transients closest to CSS140608:100655+301932 in discovery time, spatial sky neighborhood, and cosmological redshift:
⏱️ Closest in Time
SN2014bn
Exploded same day
Type Ia
2014/06/08 · Mag 17.6
CSS140609:173103+203632
+1d after
Type Ia
2014/06/09 · Mag 17.6
CSS140609:233328+043035
+1d after
Type Transient
2014/06/09 · Mag 19.2
🔭 Closest on the Sky
AT2019rvk
17.0′ away
Type Candidate
Discovered 2019/10/01
Gaia17dam
35.1′ away
Type Candidate
Discovered 2017/11/22
AT2020afd
35.7′ away
Type Candidate
Discovered 2020/01/18
🌌 Same Cosmic Era (Redshift)
No redshift match available (target z missing or no comparable redshifts in index).
❓ Frequently Asked Questions About CSS140608:100655+301932
Scientific & observational Q&As indexed from astronomical databases & the sne.space
What type of supernova is CSS140608:100655+301932 and what kind of star exploded? Astrophysics & Progenitor
CSS140608:100655+301932 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 CSS140608:100655+301932? Astrophysics & Progenitor
The progenitor of CSS140608:100655+301932 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 CSS140608:100655+301932 from Earth and how old is the light reaching us? Cosmic Distance & Time
The distance to CSS140608:100655+301932 has not been measured. No spectroscopic redshift or luminosity distance is published for this transient, so neither its distance from Earth nor its lookback time can be stated. A redshift requires a spectrum, and a photometric redshift requires multi-band imaging that has not been reported. Without a distance, its intrinsic luminosity and total energy release are also undetermined. Check the sources below for follow-up spectroscopy or host-galaxy identification.
What does the cosmological redshift of CSS140608:100655+301932 tell us about the expansion of space? Cosmic Distance & Time
No spectroscopic redshift has been measured for CSS140608:100655+301932. 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 CSS140608:100655+301932 become at its peak, and how many Suns does that equal? Explosion Energetics
At peak brightness, CSS140608:100655+301932 achieved an apparent magnitude of 19.3 around 2014/06/07.
How much total energy was released by CSS140608:100655+301932, and where did that energy go? Explosion Energetics
The total energy released by CSS140608:100655+301932 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 CSS140608:100655+301932 expanding through space? Explosion Energetics
No ejecta velocity is measured for CSS140608:100655+301932. 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 CSS140608:100655+301932 weeks and months after detonation? Radioactive Engine
The power source sustaining CSS140608:100655+301932 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 CSS140608:100655+301932 create and disperse into the universe? Nucleosynthesis & Elements
The nucleosynthetic products of CSS140608:100655+301932 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 CSS140608:100655+301932 leave behind a black hole, a neutron star, or nothing at all? Cosmic Remnant
Whether CSS140608:100655+301932 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 CSS140608:100655+301932'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 CSS140608:100655+301932. 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 CSS140608:100655+301932 explode, and where is it located relative to the galactic center? Galactic Environment
No host galaxy is identified for CSS140608:100655+301932 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 CSS140608:100655+301932 located in the night sky and which constellation is it in? Sky Coordinates
In the celestial sphere, CSS140608:100655+301932 is located at Right Ascension 10:06:55.22 and Declination +30:19:31.7, situated in the constellation Leo Minor (The Lesser Lion). Because its declination is +30:19:31.7, it is primarily placed in the Northern celestial hemisphere.
How much Milky Way interstellar dust obscures our view of CSS140608:100655+301932? Interstellar Dust
Along this line of sight, the catalog records a Milky Way foreground color excess of E(B−V) = 0.0205 mag (source: published extinction estimate), corresponding to roughly A_V ≈ 0.06 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 CSS140608:100655+301932 monitored? Astronomical Observations
No calibrated photometry is published for CSS140608:100655+301932. 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 CSS140608:100655+301932's chemical makeup? Astronomical Observations
No spectrum has been published for CSS140608:100655+301932. 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 CSS140608:100655+301932 and how was it first detected? Discovery & History
CSS140608:100655+301932 was officially reported on 2014/06/08 by CRTS. 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 CSS140608:100655+301932? Scientific Research
Data for CSS140608:100655+301932 are compiled from international astronomical notices, the IAU Transient Name Server (TNS), and peer-reviewed astrophysical journals.
How does CSS140608:100655+301932 contribute to measuring the Hubble Constant and the scale of the cosmos? Cosmology & Distance Ladder
CSS140608:100655+301932 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 CSS140608:100655+301932 be detected on Earth? Multi-Messenger Astronomy
No neutrino or gravitational-wave counterpart has been reported for CSS140608:100655+301932, 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 CSS140608:100655+301932 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 CSS140608:100655+301932 is not established for a historical comparison (unclassified; no redshift or luminosity distance is published). While historical naked-eye supernovae occurred within our Milky Way or its immediate satellites, modern discoveries like CSS140608:100655+301932 allow astrophysicists to probe diverse galactic environments, metallicities, and stellar populations across the broader universe.
Can I see CSS140608:100655+301932 tonight with a backyard telescope or binoculars? Backyard Observation
Unknown — no measured brightness. CSS140608:100655+301932 was discovered 4543 days ago (2014/06/08), 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 CSS140608:100655+301932 pose any threat to Earth? Planetary Safety
Earth is in no danger from CSS140608:100655+301932. The astrophysical 'lethal kill zone' for a supernova to damage our ozone layer is roughly 50 to 100 light-years. This transient is far outside the solar neighbourhood: it was discovered by a wide-field survey at a magnitude only reachable for an extragalactic object, and any transient in our own galaxy within that radius would have appeared far brighter than the ~18th magnitude reported here. Its exact distance is unmeasured, but the detection brightness alone rules out any nearby threat.
Data sourced from IAU TNS, ALeRCE, WISeREP, and the sne.space.
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