Kepler-90

SpaceFanatic64 · Post #1by **SpaceFanatic64** » 21.12.2018, 19:10

Here, I will be posting any addons that I have made. Stay tuned for some addons that I worked really hard on! :wink:

Added after 9 minutes 52 seconds:
My version of the Kepler-90 system. Textures were taken from fungun and Fugazi's Star Trek addons from the Celestia Motherlode, and the star data was from Wikipedia and the exoplanet orbits were from exoplanet.eu.

LukeCEL · Post #2by **LukeCEL** » 22.12.2018, 02:04

SpaceFanatic64, your coordinates are a bit off. To calculate the RA and Dec, you can use a converter (I recommend http://www.astrouw.edu.pl/~jskowron/ra-dec/, since it's very flexible).

For example, for Kepler-90 just enter "18 57 44.0384 +49 18 18.4958" and pick the eleventh option, so that's "284.4334933" and "49.3051377".

SpaceFanatic64 · Post #3by **SpaceFanatic64** » 22.12.2018, 02:49

Oh, I just didn't know how to convert RA and Dec. I'll update the addon to have the right coordinates.

gironde · Post #4by **gironde** » 22.12.2018, 10:49

an other addon for Kepler-90 viewtopic.php?p=141549#p141549
by SpaceFanatic64

gironde · Post #5by **gironde** » 22.12.2018, 12:17

I am not convinced by this conversion site. See the results for:
-18: 04: 20.99 (hh: mm: ss.ss)
result
-18: 04: 02.00 01: 00: 00.00
-18 04 02.00 01 00 00.00
-18: 04: 02.00, 01: 00: 00.00
-18.0672222 1.0000000
-18h 04m 02.00s 01d 00m 00.00s
-18h04m02.00s 01d00m00.00s
-18h04m02.00s 01 ° 00'00.00 "
J-180402.00 010000.00 +

for convert RA hh:mm:ss.ss in decimal degres :
Abs (hh*15+mm*0.25+ss*0.0041666) * +1 or -1 (according to the sign)

and DEC degres dd:mn:ss in decimal degres:
Abs (dd+mn/60+ss/3600) * +1 or -1 (according to the sign)

and parsec (pc) to ly : pc*3.2616
ly to pc : ly/3.2616

Radius in Rsol to km : 696342*Rsol
Radius in Rearth to km : 6378.1*Rearth
Radius in Rjup to km : 71492*Rjup

Period Day in Period Year : Period D/365.2425

Easy to make with Excel

LukeCEL · Post #6by **LukeCEL** » 22.12.2018, 16:53

gironde, Good catch. It seems that the site has a problem when it only converts the right ascension. However, if you enter in both the right ascension and the declination, the problem disappears.

gironde · Post #7by **gironde** » 22.12.2018, 17:46

ok LukeCEL

:hi:

SpaceFanatic64 · Post #8by **SpaceFanatic64** » 24.12.2018, 02:12

Finally, the update for Kepler-90. Replace RA and Dec in the .stc with these following lines: RA 284.4334933 and Dec 49.3051377.

SpaceFanatic64 · Post #9by **SpaceFanatic64** » 01.02.2019, 15:02

Sorry for not being here in a while. I've been busy with school, so I won't make addons all the time, but I will make them once in a while