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Star

RR Lyrae

Also RR Lyr

Open in Ouranos

The prototype of the RR Lyrae stars, old pulsating stars used to measure distances across the Milky Way.

Measured

Distance
819 light-years
Constellation
Lyra
Position (J2000)
RA 19h 25m 28s, Dec +42.78°

How far, from the Sun

819 light-years. To cross it:

  • Light819 years
  • Voyager 1's speed14.5 million years
  • Driving at 100 km/h8.83 billion years

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

Facts

  • It brightens and fades every 0.567 days, about 13.6 hours.

How it was found

  • Williamina Fleming discovered its variability in 1901.

Where this comes from

  • Gaia DR3 parallax 3.9849 ± 0.0265 mas, Gaia DR3 2125982599343482624 (Gaia Collaboration 2023, A&A 674, A1)
  • 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.