Bubup
Scientific overview
Bubup is a wolf-rayet star in the constellation Mensa (Mensae), lying about 124.96 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 | WN... |
| Apparent magnitude | 6.69 |
| Absolute magnitude | 3.77 |
| Luminosity (Sun = 1) | 2.696 |
| Colour index (B−V) | 0.584 |
| Distance | 124.96 ly (38.31 pc) |
Values are real catalogue data; fields without a reliable value are omitted, never estimated.
Precision measurements
Astrometry and astrophysics from SIMBAD and Gaia DR3 · Gaia DR3 4650314511916109696
| Parallax | 26.2854 ± 0.017 mas | SIMBAD · measured |
| Distance | 38.039 pc | Gaia · estimated |
| Proper motion (RA) | 138.8 mas/yr | SIMBAD · measured |
| Proper motion (Dec) | -108.5 mas/yr | SIMBAD · measured |
| Radial velocity | 61.4 ± 0.18 km/s | SIMBAD · measured |
| Spectral type | F9.5V | SIMBAD · catalogued |
| Effective temperature | 5872.8 K | Gaia · modeled |
| Radius | 1.5573 R_sun | Gaia · modeled |
| Surface gravity (log g) | 3.9898 log(cm/s^2) | Gaia · modeled |
| Metallicity [M/H] | -0.5697 dex | Gaia · modeled |
| Right ascension (ICRS) | 84.2584 deg | SIMBAD · measured |
| Declination (ICRS) | -73.6993 deg | SIMBAD · measured |
Full field-level provenance
- Parallax: Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · plx_value · 2020yCat.1350....0G · direct catalogue measurement · retrieved 2026-07-11
- Distance: ESA Gaia astrometric survey · Gaia EDR3 · Bailer-Jones (2021) · external.gaiaedr3_distance · r_med_geo · row 4650314511916109696 · Bayesian estimate · retrieved 2026-07-11
- Proper motion (RA): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · pmra · 2020yCat.1350....0G · direct catalogue measurement · retrieved 2026-07-11
- Proper motion (Dec): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · pmdec · 2020yCat.1350....0G · direct catalogue measurement · retrieved 2026-07-11
- Radial velocity: Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · rvz_radvel · 2018yCat.1345....0G · direct catalogue measurement · retrieved 2026-07-11
- Spectral type: Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · sp_type · 2006AJ....132..161G · catalogue identifier/value · retrieved 2026-07-11
- Effective temperature: ESA Gaia astrometric survey · Gaia DR3 · gaiadr3.astrophysical_parameters · teff_gspphot · row 4650314511916109696 · model output · retrieved 2026-07-11
- Radius: ESA Gaia astrometric survey · Gaia DR3 · gaiadr3.astrophysical_parameters · radius_gspphot · row 4650314511916109696 · model output · retrieved 2026-07-11
- Surface gravity (log g): ESA Gaia astrometric survey · Gaia DR3 · gaiadr3.astrophysical_parameters · logg_gspphot · row 4650314511916109696 · model output · retrieved 2026-07-11
- Metallicity [M/H]: ESA Gaia astrometric survey · Gaia DR3 · gaiadr3.astrophysical_parameters · mh_gspphot · row 4650314511916109696 · model output · retrieved 2026-07-11
- Right ascension (ICRS): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · ra · 2020yCat.1350....0G · direct catalogue measurement · retrieved 2026-07-11
- Declination (ICRS): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · dec · 2020yCat.1350....0G · 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 constellationMensa
- Orbited byHD 38283 b
Related stars in Mensa
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.