Extrasolar Visions - HD 46375 b

» Extrasolar Planet Guide » Companions of Normal Stars » HD 46375 » HD 46375 b

Cloudy Hot Jupiter

Object Type:

Cloudy Hot Jupiter

Parent Star:

HD 46375 (K1 IV)

Discovery Status:

Confirmed

Current Planet

Habitability Zone

Mass ( M sin i ):

0.249 Jupiters

Mean Distance:

0.041 AU

Orbital Period:

3.024 Days

Eccentricity:

0.04

Argument of Perihelion (omega):

52 °

Radial Velocity of Star:

35.1 m/s

Planet Appearance:

Silicate clouds over dark sodium haze

Estimated Mean Temp:

1223 Kelvin

Mean Angular Star Size:

16.476°

Gravitational Influence
(Hill Sphere):

0.001 AU / 260000 km

Max Stable Prograde Moon Orbit:

0 AU / 90000 km

Max Moon Mass:

< 0.0001 Earths ¹^,²
66.2194 x Phobos

Tidally locked if older than:

2 Myr ³

Estimated Bond Albedo:

~ 0.53 ⁴

Notes:
    ¹ assuming age of 5 Gyr
    ² inaccurate for planets with mass < 0.3 Jupiters
    ³ orbit may be too eccentric for 1:1 tidal lock
    ⁴ from Sudarsky et al. 2000

Year Discovered:

2000

Detection Method:

Doppler Spectroscopy

Discovered By:

MARCY G., BUTLER P. & VOGT S.

Click image below to enlarge

HD 46375 b and 79 Ceti b were the first two planets of sub-Saturn mass to be discovered around sun-like stars.

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The Planet of HD 46375
HD 46375 b was one of the first extrasolar planets discovered with a mass similar to Saturn. This planet is epistellar, a smaller sibling to Hot Jupiters like 51 Pegasi and tau Bootes. Here we see the planet's glowing red surface covered by clouds of silicate vapor. Superbolts of lightning dot the planet's night side. Any moons of this world would be scorched, rocky, and barren.

View the Night Sky from HD 46375 b...
	Cylindrical All Sky View (750 x 1500 pixels)
	Northern Hemisphere (750 x 750 pixels)
	Southern Hemisphere (750 x 750 pixels)