HR 3207
Scientific overview
HR 3207 is a wolf-rayet star in the constellation Vela (Velorum), lying about 1,117 light-years from Earth.
Wolf-Rayet. Evolved, massive stars shedding their outer layers in powerful stellar winds. Such stars have surface temperatures around ≥ 30,000 K and appear blue to the eye.
Physical properties
| Spectral type | WC8 + O9I |
| Luminosity class | I |
| Apparent magnitude | 1.75 |
| Absolute magnitude | -5.92 |
| Luminosity (Sun = 1) | 20,380 |
| Colour index (B−V) | -0.145 |
| Distance | 1,117 ly (342.47 pc) |
Values are real catalogue data; fields without a reliable value are omitted, never estimated.
Precision measurements
Astrometry and astrophysics from SIMBAD
| Parallax | 2.92 ± 0.3 mas | SIMBAD · measured |
| Proper motion (RA) | -6.07 mas/yr | SIMBAD · measured |
| Proper motion (Dec) | 10.43 mas/yr | SIMBAD · measured |
| Radial velocity | 15 ± 3.1 km/s | SIMBAD · measured |
| Spectral type | WC8+O7.5III-V | SIMBAD · catalogued |
| Right ascension (ICRS) | 122.4 deg | SIMBAD · measured |
| Declination (ICRS) | -47.3366 deg | SIMBAD · measured |
Full field-level provenance
- Parallax: Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · plx_value · 2007A&A...474..653V · direct catalogue measurement · retrieved 2026-07-11
- Proper motion (RA): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · pmra · 2007A&A...474..653V · direct catalogue measurement · retrieved 2026-07-11
- Proper motion (Dec): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · pmdec · 2007A&A...474..653V · direct catalogue measurement · retrieved 2026-07-11
- Radial velocity: Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · rvz_radvel · 2006AstL...32..759G · direct catalogue measurement · retrieved 2026-07-11
- Spectral type: Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · sp_type · 1999A&A...345..163D · catalogue identifier/value · retrieved 2026-07-11
- Right ascension (ICRS): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · ra · 2007A&A...474..653V · direct catalogue measurement · retrieved 2026-07-11
- Declination (ICRS): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · dec · 2007A&A...474..653V · direct catalogue measurement · retrieved 2026-07-11
measured = direct catalogue value · estimated = Bayesian inference (Bailer-Jones distance) · modeled = model output (Gaia GSP-Phot). Fields a source did not provide are omitted, never invented.
Evolution
A Wolf-Rayet star is a hot, evolved, massive star driving away its outer layers in fierce stellar winds, often a prelude to a supernova.
Location in the sky
Knowledge connections
- In constellationVela
Related stars in Vela
Sources
The primary and reference sources this topic draws on.
- HYG DatabaseHYG Database (Hipparcos + Yale Bright Star + Gliese), by D. Nash / astronexus
Aggregated, openly-licensed star catalogue combining Hipparcos, the Yale Bright Star Catalogue, and the Gliese Catalogue of Nearby Stars.
- HipparcosESA Hipparcos space astrometry mission
High-precision parallax, magnitude, and position for ~118,000 stars.