Timeline for Why are IAU constellation boundaries not rectilinear?
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
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| Mar 2 at 12:45 | comment | added | planetmaker | @Gnubie yes, arcs when you look at the "celestial sphere". When you draw it on a sheet of paper or monitor, it depends on how you project from the sphere to a 2D plane. The borders follow lines with one coordinate fixed, thus either RA=const or DEC=const. | |
| Mar 2 at 11:02 | comment | added | Gnubie | @planetmaker Thanks for the thorough explanation. Wouldn't that mean that the line segments should actually be arcs? Guess they're short enough that they are good approximations. | |
| Mar 2 at 11:01 | vote | accept | Gnubie | ||
| Mar 2 at 2:31 | comment | added | PM 2Ring | The ICRF-3 frame is very closely aligned to the J2000 equatorial frame. According to JPL, the difference is only ~20 milliarc-seconds. ssd.jpl.nasa.gov/horizons/manual.html#frames | |
| Mar 1 at 18:47 | history | edited | planetmaker | CC BY-SA 4.0 |
added 295 characters in body
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| Mar 1 at 18:40 | history | answered | planetmaker | CC BY-SA 4.0 |