## Monday, 12 February 2018

### Stellar Radiuses (If Sphere of Fix Stars is One Light Day Up)

Working method: I took a French wiki list of nearby stars, Liste d'étoiles et de naines brunes les plus proches, working my way from 1 to 20, and for each noting the diverse, if any, distances in "light years". Next line I convert this to light days. Since there is one light day up to the stars and since the radius is proportional to the distance, I last divide the supposed radius of the star wit the number of supposed light days.

Proxima Centauri. 4.2420 LY.
4.2420*365.2425 = 1549.358685 LD
104,866.5[km]/ 1549.358685 = 67.684[km]

Alpha Centauri A. 4.3649 LY
4.3649*365.2425 = 1594.24698825 LD
854 411.634[km]/1594.24698825 = 535.934[km]

Alpha Centauri B. 4.3649 LY
1594.24698825 LD
602 335.83[km]/1594.24698825 = 377.818[km]

Barnard's Star. 5.9629 LY
5.9629*365.2425 = 2177.90450325 LD
104 451.3[km] / 2177.90450325 = 47.960[km]

WISE 1049-5319
(Luhman 16). 6.5 LY
6.5*365.2425 = 2374.07625 LD
? km < 0,41212852998085568193774891173664*696 342km
< 286982.40482392900727189595269651537088[km] / 2374.07625 < 120.882[km]

WISE 0855–0714. 7.175 LY
7.175*365.2425 = 2620.6149375 LD
> 0,12599210498948731647672106072782 * 696 342km
< 0,20800838230519041145300568243579 * 696 342km
> 87 733.59437258957693003289686933163444[km] / 2620.6149375 > 33.478[km]
< 144 844.97295116090149200888291870288018[km] / 2620.6149375 < 55.271[km]

Wolf 359 (CN Leonis). 7.7823 LY
7.7823*365.2425 = 2842.42670775 LD
> 0,16 * 696 342km > 111 414.72[km]
< 0,19 * 696 342km < 132 304.98[km]
> 111 414.72[km] / 2842.42670775 > 39.197[km]
< 132 304.98[km] / 2842.42670775 < 46.546[km]

[46.5464877737268369[km]]

Lalande 21185 (BD+36°2147). 8.2903 LY
8.2903*365.2425 = 3027.96989775 LD
0,46 * 696 342km = 320 317.32[km]
320317.32[km] / 3027.96989775 = 105.786[km]

[105.7861639371048136[km]]

Sirius. 8.5826 LY
8.5826*365.2425 = 3134.7302805 LD
A 1 191 441.162[km] / 3134.7302805 = 380.078[km]
B 5570.736 km / 3134.7302805 = 1.777[km]

[A 380.0777277112215014[km]]

Luyten 726-8. 8.7278 LY
8.7278*365.2425 = 3187.7634915 LD
[Both or each of them.]
97 487.88[km] / 3187.7634915 = 30.582[km]

Ross 154 (V1216 Sagittarii). 9.6811 LY
9.6811*365.2425 = 3535.94916675 LD
167 122.08[km] / 3535.94916675 = 47.264[km]

Ross 248 (HH Andromedae). 10.321 LY
10.321*365.2425 = 3769.6678425 LD
118 378.14[km] / 3769.6678425 = 31.403[km]

Epsilon Eridani (BD-09°697). 10.522 LY
10.522*365.2425 = 3843.081585 LD
584 927.28[km] / 3843.081585 = 152.203[km]

Lacaille 9352 (CD-36°15693). 10.742 LY
10.742*365.2425 = 3923.434935 LD
319 620.978[km] / 3923.434935 = 81.465[km]

Ross 128 (FI Virginis). 10.918 LY
10.918*365.2425 = 3987.717615 LD
146 231.82[km] / 3987.717615 = 36.671[km]

[36.6705554701119427[km]]

EZ Aquarii. 11.266 LY
11.266*365.2425 = 4114.822005 LD
?

Procyon. 11.402 LY
11.402*365.2425 = 4164.494985 LD
A 1 426 108.416[km] / 4164.494985 = 342.445[km]
B 13 926.84[km] / 4164.494985 = 3.344[km]

[A 342.444503147840866[km]]

61 Cygni. 11.402 LY
4164.494985 LD
A 501 366.24[km] / 4164.494985 = 120.391[km]
B 466 549.14[km] / 4164.494985 = 112.030[km]

Struve 2398. 11.525 LY
11.525*365.2425 = 4209.4198125 LD
A 376 024.68[km] / 4209.4198125 = 89.329[km]
B 382 988.1[km] / 4209.4198125 = 90.984[km]

Groombridge 34. 11.624 LY
11.624*365.2425 = 4245.57882 LD
A 236 756.28[km] / 4245.57882 = 55.765[km]
B 132 304.98[km] / 4245.57882 = 31.163[km]

Epsilon Indi. 11.824 LY
11.824*365.2425 = 4318.62732 LD
(Epsilon Indi A)
529 219.92[km] / 4318.62732 = 122.544[km]

Now, since this is the radius, you will want to double it to get the diameter:

Proxima Centauri
67.684[km]*2=135.368[km]

Alpha Centauri A
535.934[km]*2=1071.868[km]

Alpha Centauri B
377.818[km]*2=755.636[km]

Barnard's Star
47.960[km]*2=95.92[km]

WISE 1049-5319
(Luhman 16)
< 120.882[km]*2 < 241.764[km]

WISE 0855–0714
> 33.478[km]*2 > 66.956[km]
< 55.271[km]*2 < 110.542[km]

Wolf 359 (CN Leonis)
> 39.197[km]*2 > 78.394[km]
< 46.546[km]*2 < 93.092[km]

Lalande 21185 (BD+36°2147)
105.786[km]*2=211.572[km]

Sirius
A 380.078[km]*2=760.156[km]
B 1.777[km]*2=3.554[km]

Luyten 726-8
30.582[km]*2=61.164[km]

Ross 154 (V1216 Sagittarii)
47.264[km]*2=94.528[km]

Ross 248 (HH Andromedae)
31.403[km]*2=62.806[km]

Epsilon Eridani (BD-09°697)
152.203[km]*2=304.406[km]

Lacaille 9352 (CD-36°15693)
81.465[km]*2=162.93[km]

Ross 128 (FI Virginis)
36.671[km]*2=73.342[km]

Procyon
A 342.445[km]*2=684.89[km]
B 3.344[km]*2=6.688[km]

61 Cygni
A 120.391[km]*2=240.782[km]
B 112.030[km]*2=224.06[km]

Struve 2398
A 89.329[km]*2=178.658[km]
B 90.984[km]*2=181.968[km]

Groombridge 34
A 55.765[km]*2=111.53[km]
B 31.163[km]*2=62.326[km]

Epsilon Indi
122.544[km]*2=245.088[km]

If you want it in miles, feel free to convert here:

https://www.rapidtables.com/convert/length/km-to-mile.html