Planet V803 Cen b

Detailed information about planet V803 Cen b and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

V803 Cen b

Planet Status

Controversial

Discovered in

1988

Publication Status

Published in a refereed paper

Update

2025-08-11

Mass

60.0 (\begin{matrix} + 50.0 \\ - 40.0 \end{matrix})

M_J 2 publications

Evolved cataclysmic variables as progenitors of AM CVn stars
Arbitrarily degenerate helium white dwarfs as donors in AM Canum Venaticorum binaries

Mass*sin(i)

— 1 publication

Maximum mass ratio of AM CVn-type binary systems and maximum white dwarf mass in ultra-compact X-ray binaries.

Semi-Major Axis

0.00158 AU

Orbital Period

0.0186574 day 1 publication

Maximum mass ratio of AM CVn-type binary systems and maximum white dwarf mass in ultra-compact X-ray binaries.

Eccentricity

—

Angular distance

—

ω

—

T_peri

—

Radius

—

Inclination

15.0 deg 1 publication

On the orbital periods of the AM CVn stars HP Librae and V803 Centauri

Detection Method

Primary Transit

Mass Meas. Method

Radial Velocity

Radius Meas. Method

—

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

—

Calculated temperature

—

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

AE 1 b

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

No remarks

No link

Star

Name

V803 Cen

Distance

347.0 (\begin{matrix} + 32.0 \\ - 27.0 \end{matrix})

pc 1 publication

Hubble Space Telescope Parallaxes of AM CVn Stars and Astrophysical Consequences

Spectral type

DA

Apparent magnitude V

14.4

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

Mass

1.31 (\begin{matrix} + 0.12 \\ - 0.0 \end{matrix})

M_Sun 1 publication

Maximum mass ratio of AM CVn-type binary systems and maximum white dwarf mass in ultra-compact X-ray binaries.

Age

—

Effective temperature

14000.0 K 1 publication

The thermal state of the accreting white dwarf in AM Canum Venaticorum binaries

Radius

0.01 R_Sun

Metallicity [Fe/H]

—

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

13:23:44.5

Dec₂₀₀₀

-41:44:29.4

Alternate Names

AE 1

Cataclysmic variable and binary system with extremely low mass ratio (q = 0.016). Maximum mass for accreting primary component is estimated as 1.43 M_Sol, within Chandrasekhar limit, which implies a maximum mass of 24 M_Jup for the secondary, likely an almost fully degenerate helium dwarf (Deloye et al. 2005). On the other hand Roelof et al. (2007) consider a larger mass ratio (q = 0.07) compatible with a stellar rather than substellar secondary.
Sarkar et al. (2023) provide a broader mass range within stellar domain for the secondary component, with a minimum mass close to 0.06 M_Sol.

No link