<p>I have a question where I have to calculate the orbital inclination of a planet, so that it isn't a exoplanet but a stellar component. The mass of the star it is orbiting is 1.1 <span class="math-container">$M_☉$</span>. Does the exoplanet has a special mass if it is a stellar component (for example 0.5 <span class="math-container">$M_☉$</span>) or is there another relation?</p>

<p>The question was made out of a few sub-questions. It is about 51 Peg b. In the first question, I had to calculate the half long ax (=0.05284 AU), the eccentricity (=0.013) and the <span class="math-container">$mass*sin(i)$</span> (=0.500 <span class="math-container">$M_J$</span>)
In the second question, I had to calculate the inclination at which the mass of the planet is 4 <span class="math-container">$M_J$</span> (=7.18°) and the inclination at which it wasn't a planet, but a stellar component.</p>

CC BY-SA 4.0
2020-03-07T10:55:45.540Z
So you're asking what happens if instead of an exoplanet orbiting a star, it is another star that is orbiting? Orbital inclination relative to what? The line of sight?
usernumber
CC BY-SA 4.0
2020-03-07T11:19:01.290Z
Highly confused/confusing. Needs much clarification.
ProfRob
CC BY-SA 4.0
2020-03-07T12:31:10.563Z
The Q seems to involve radial velocity based [minimum mass](https://en.wikipedia.org/wiki/Minimum_mass) and [substellar objects](https://en.wikipedia.org/wiki/Substellar_object).
Mike G
CC BY-SA 4.0
2020-03-07T12:58:49.303Z
@MikeG Yes, There is a radial velocity graph given. The graph is the same as in [this site](http://exoplanets.org/detail/51_Peg_b)
BOB
CC BY-SA 4.0
2020-03-07T13:55:44.820Z
@antispinwards I want to know what stellar component means.
BOB
CC BY-SA 4.0
2020-03-07T17:32:38.783Z
A star is anything more massive than 0.08 solar masses, but I'm not doing your homework.
ProfRob
<exoplanet><inclination>
What is a stellar component?
BOB
# What is a stellar component?

(Asked by: username_0 on 2020-03-07)

I have a question where I have to calculate the orbital inclination of a planet, so that it isn't a exoplanet but a stellar component. The mass of the star it is orbiting is 1.1 $M\_☉$. Does the exoplanet has a special mass if it is a stellar component (for example 0.5 $M\_☉$) or is there another relation?

The question was made out of a few sub-questions. It is about 51 Peg b. In the first question, I had to calculate the half long ax (=0.05284 AU), the eccentricity (=0.013) and the $mass\*sin(i)$ (=0.500 $M\_J$)
In the second question, I had to calculate the inclination at which the mass of the planet is 4 $M\_J$ (=7.18°) and the inclination at which it wasn't a planet, but a stellar component.

**Tags:** exoplanet, inclination

> **Comments:**
> **username_1**: So you're asking what happens if instead of an exoplanet orbiting a star, it is another star that is orbiting? Orbital inclination relative to what? The line of sight?  
> **username_2**: Highly confused/confusing. Needs much clarification.  
> **username_3**: The Q seems to involve radial velocity based [minimum mass](https://en.wikipedia.org/wiki/Minimum_mass) and [substellar objects](https://en.wikipedia.org/wiki/Substellar_object).  
> **username_0**: @MikeG Yes, There is a radial velocity graph given. The graph is the same as in [this site](http://exoplanets.org/detail/51_Peg_b)  
> **username_0**: @antispinwards I want to know what stellar component means.  
> **username_2**: A star is anything more massive than 0.08 solar masses, but I'm not doing your homework.  

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## 0 answers

