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Supernova remnant

G1.9+0.3

Also SNR G001.9+00.3

Open in OuranosCompare its size

The youngest known supernova remnant in the Milky Way, near the Galactic Centre.

Measured

Distance
about 27,200 light-years (published estimates 26,680–27,720)
Size
about 11.8 light-years across (approximate)
Constellation
Sagittarius
Position (J2000)
RA 17h 48m 46s, Dec −27.16°

How far, from the Sun

About 27,200 light-years. To cross it:

  • Light27,200 years
  • Voyager 1's speed483 million years
  • Driving at 100 km/h294 billion years

Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.

Facts

  • Its star exploded around 1900, but dust hid the explosion from everyone at the time.
  • One published catalogue places it at the Galactic Centre's distance, 8.34 ± 0.16 kiloparsecs.

Where this comes from

  • Ranasinghe & Leahy 2022, ApJ 940, 63 (8.34 ± 0.16 kpc)
  • This research has made use of the SIMBAD database, CDS, Strasbourg, France (Wenger et al. 2000, A&AS 143, 9).
  • This research has made use of the VizieR catalogue access tool, CDS, Strasbourg, France (DOI: 10.26093/cds/vizier).

Every catalogue Ouranos draws is credited on the credits page.