Star · Virgo
3C 273
Knowledge graphHIP 60936
Scientific overview
3C 273 is a star in the constellation Virgo (Virginis).
Physical properties
| Apparent magnitude | 12.88 |
| Absolute magnitude | -7.12 |
| Luminosity (Sun = 1) | 61,376 |
| Colour index (B−V) | 0.12 |
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 3700386905605055360
| Parallax | 0.0108 ± 0.0408 mas | SIMBAD · measured |
| Distance | 17119.4 pc | Gaia · estimated |
| Proper motion (RA) | -0.023 mas/yr | SIMBAD · measured |
| Proper motion (Dec) | 0.098 mas/yr | SIMBAD · measured |
| Radial velocity | 43555.5 ± 5.000e-4 km/s | SIMBAD · measured |
| Effective temperature | 9879.6 K | Gaia · modeled |
| Radius | 13.3099 R_sun | Gaia · modeled |
| Surface gravity (log g) | 2.7659 log(cm/s^2) | Gaia · modeled |
| Metallicity [M/H] | -2.3554 dex | Gaia · modeled |
| Right ascension (ICRS) | 187.3 deg | SIMBAD · measured |
| Declination (ICRS) | 2.0524 deg | SIMBAD · measured |
Full field-level provenance
- Parallax: Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · plx_value · 2018yCat.1345....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 3700386905605055360 · 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 · 2022ApJS..261....2K · direct catalogue measurement · retrieved 2026-07-11
- Effective temperature: ESA Gaia astrometric survey · Gaia DR3 · gaiadr3.astrophysical_parameters · teff_gspphot · row 3700386905605055360 · model output · retrieved 2026-07-11
- Radius: ESA Gaia astrometric survey · Gaia DR3 · gaiadr3.astrophysical_parameters · radius_gspphot · row 3700386905605055360 · model output · retrieved 2026-07-11
- Surface gravity (log g): ESA Gaia astrometric survey · Gaia DR3 · gaiadr3.astrophysical_parameters · logg_gspphot · row 3700386905605055360 · model output · retrieved 2026-07-11
- Metallicity [M/H]: ESA Gaia astrometric survey · Gaia DR3 · gaiadr3.astrophysical_parameters · mh_gspphot · row 3700386905605055360 · 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.
Location in the sky
Constellation
Virgo
Hemisphere
Both (equatorial)
Best seen
Spring (N. evening sky)
RA / Dec
12.4852h / 2.0524°
Knowledge connections
- In constellationVirgo
Related stars in Virgo
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.