Skip to content

Missions Planets Black Holes 3D Map Agencies Blog About Sign in

Menu

Missions Planets Black Holes 3D Map Agencies Blog About Sign in

Acquiring mission data

Missions Planets Black Holes 3D Map Agencies Blog About apexandromeda.com

This is an independent informational project and is not affiliated with, endorsed by, or sponsored by NASA, ESA, JAXA, Roscosmos, CNSA, ISRO, CSA, or any other space agency. Agency names, logos, and other marks are used for identification where permitted by their respective usage policies.

A passion project from the team behind Apex Rental Pro.

Community discussion

Comments 0

No comments yet. The airlock is open.

Sign in or create an account to comment and vote.

HD 81817 c | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 81817 c

Confirmed exoplanet · Gas Giant

HD 81817 c

Orbiting HD 81817

Discovered in 2022 using Radial Velocity. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Generic gas giant catalog artwork; not a direct image of HD 81817 c — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,022
Method: Radial Velocity
Radius: 12 R⊕
Mass: 7,185.782454 M⊕
Orbit: 622.97802 days
Distance: 269.126 pc

Planet profile

Orbit and physical properties

Orbital period: 622.97802 days
Semi-major axis: 2.325 AU
Eccentricity: 0.095
Radius: 12 Earth radii
Mass: 7,185.782454 Earth masses
Mass provenance: Msini
Density: 22.9 g/cm³
Equilibrium temperature: 1,198.52 K
Insolation: 337.2228 Earth flux

Host system

Star and system properties

Host star: HD 81817
Stars in system: 1
Known planets in system: 2
Spectral type: K3 III
Stellar temperature: 4,140 K
Stellar radius: 83.8 R☉
Stellar mass: 4.3 M☉
Stellar metallicity: -0.17 dex
Stellar age: 0.15 Gyr
Distance: 269.126 parsecs
Right ascension: 09h37m05.18s
Declination: +81d19m34.71s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,022
Publication date: 2022-09
Discovery locale: Ground
Facility: Multiple Observatories
Telescope: Multiple Telescopes
Instrument: Multiple Instruments
NASA Exoplanet Archive: Open composite record ↗

Visual archive

Gallery

One image from HD 81817 c.

Generic gas giant catalog artwork; not a direct image of HD 81817 c — Apex Andromeda catalog artwork