Planet Sirius Bb

Detailed information about planet Sirius Bb and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

Sirius Bb

Mass

1.5 (\pm 0.5)

M_J

Mass*sin(i)

—

Semi-Major Axis

0.9 (\pm 0.4)

Orbital Period

—

Eccentricity

—

ω

—

T_peri

—

Radius

—

Inclination

—

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

—

Calculated temperature

—

Measured temperature

—

Hottest point longitude

—

Surface gravity log(g/g_H)

—

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

Lucas et al. (2022) excluded companions more massive than 20 M_Jup but not <1-2 M_Jup planets at 0.5-1.3 AUs through imaging. Astrometric analysis performed by Kiefer et al. (2024a) suggests that a source within 200-500 milliarcseconds (i.e 0.5-1.3 AUs) is inducing proper motion anomalies only partially induced by primary star Sirius A.

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Star

Name

Sirius B

Distance

2.65458 (\pm 0.00321)

pc 1 publication

The Revised TESS Input Catalog and Candidate Target List

Spectral type

DA1.9

Apparent magnitude V

8.5

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

Mass

1.018 (\pm 0.011)

M_Sun 1 publication

The Sirius System and Its Astrophysical Puzzles: Hubble Space Telescope and Ground-based Astrometry

Age

0.228 (\pm 0.01)

Gyr 1 publication

The Sirius System and Its Astrophysical Puzzles: Hubble Space Telescope and Ground-based Astrometry

Effective temperature

25000.0 (\pm 200.0)

K 1 publication

The Sirius System and Its Astrophysical Puzzles: Hubble Space Telescope and Ground-based Astrometry

Radius

0.0081 (\pm 0.6)

R_Sun 1 publication

The Sirius System and Its Astrophysical Puzzles: Hubble Space Telescope and Ground-based Astrometry

Metallicity [Fe/H]

—

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

06:45:09.3

Dec₂₀₀₀

-16:43:00.7

Alternate Names

alf CMa B

Renowned white dwarf companion to bright star Sirius A (spT A1Va), around which it completes a long period (P = 50.1284 ± 0.0043 y), highly eccentric orbit (a = 19.85 AUs, e = 0.591 ± 0.00037).

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