Talk:Stellar Classifications: Difference between revisions
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Created page with "==Determining Orbital Durations (Years)== {| align="center" border="2" style="background:#BDBDBD; text-align: center" |+ '''Stellar Mass''' |+ '''All masses +/- 1d10%''' |-..." |
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==Determining Orbital Durations (Years)== | ==Determining Orbital Durations (Years)== | ||
1. Determine '''base mass''': | |||
{| align="center" border="2" style="background:#BDBDBD; text-align: center" | {| align="center" border="2" style="background:#BDBDBD; text-align: center" | ||
|+ '''Stellar Mass''' | |+ '''Stellar Mass''' | ||
|- | |- | ||
| '''Star Types''' || '''Solar Masses''' | | '''Star Types''' || '''Solar Masses''' | ||
| Line 21: | Line 21: | ||
| M (Red) || 0.331 | | M (Red) || 0.331 | ||
|} | |} | ||
2) Add or subtract 1d10% from base mass for '''specific mass'''. | |||
3) Compute the orbital period using this formula: P = sqrt((D^3)/M), ''i.e.'', square root of D<sup>3</sup> divided by M, where: | |||
* P = period in standard years (to third decimal); also list (in parenthesis) standard days (converted as by multiplying years by 365.24, to single decimal). | |||
* D = Distance in AUs (as pre-determined by planetary surveys) | |||
* M = specific mass of star | |||
Revision as of 09:25, 2 March 2018
Determining Orbital Durations (Years)
1. Determine base mass:
| Star Types | Solar Masses |
| D (White dwarf) | 0.36 |
| B (Blue-white) | 4.4 |
| A (White) | 2.1 |
| F (Yellow-white) | 1.3 |
| G (Yellow) | 0.94 |
| K (Orange) | 0.57 |
| M (Red) | 0.331 |
2) Add or subtract 1d10% from base mass for specific mass.
3) Compute the orbital period using this formula: P = sqrt((D^3)/M), i.e., square root of D3 divided by M, where:
- P = period in standard years (to third decimal); also list (in parenthesis) standard days (converted as by multiplying years by 365.24, to single decimal).
- D = Distance in AUs (as pre-determined by planetary surveys)
- M = specific mass of star