Wiki operators
  • Content Count

  • Joined

  • Last visited

Community Reputation

535 Excellent


About UmbralRaptor

  • Rank

Contact Methods

  • Website URL
  • Twitter @Newpa_Hasai

Profile Information

  • Location Outer Dark
  • Interests Space, science, stabbing, the usual.

Recent Profile Visitors

3,085 profile views
  1. It's been a few years, but remember Alpha Cen Bb?
  2. I assume that they don't want the embarrassment of being the next Xavier Dumusque.
  3. UmbralRaptor

    Books about space exploration

    This is definitely a good resource, though requires some searching. For a somewhat narrower focus, I'd also suggest The Design and Engineering of Curiosity: How the Mars Rover Performs Its Job, and Taming Liquid Hydrogen (a RL10/Centaur history). For the Soviet side of things, The Difficult Road to Mars, and Don Mitchell's website.I'd like to link a bunch of David Portree's books, but and the like seem to make it really hard to do a search if I don't know the title? at least has lots of stuff, as does
  4. UmbralRaptor

    Figure trajectories by yourself.

    This is a moderately common convention in various physics texts. I think it ends up being easier to typeset than getting the arrows and hats over the vectors right?
  5. UmbralRaptor

    Figure trajectories by yourself.

    It covers a reasonable amount of topics. Perhaps more importantly it's the only textbook I've seen where the US edition is reasonably priced. >_>
  6. UmbralRaptor

    Figure trajectories by yourself.

    These can get somewhat involved, and admittedly wikipedia doesn't always have things in the best format. The (ahem) textbook answer is Fundamentals of Astrodynamics. If you're looking purely for an online resource, @Ohiobob has done good work.
  7. UmbralRaptor

    More science points!

    The instruments are for fulfilling specific missions. (Exact type of instrument falls under the cost/weight issues you bring up, but first one needs a question to answer.)
  8. UmbralRaptor

    Do any of you actually use the chat?

    Yes, we have an IRC channel (#KSPOfficial on Please don't just jump in, say "hi" (or at best ask if you can ask a question), and leave after ~45 seconds. Say something of substance, and understand that it may take a few minutes. We aren't paid tech support, and can't be watching 24/7. Also, if we answered your question, feel free to stay and talk about other KSP (or quasi-related) things?
  9. I'm going to assume that the aforementioned Hubble images of Pluto are acceptable (ie: built up from a light curve). In that case, you want a space telescope with a starshade to get something earth-like (eg: HabEx, especially as the WFIRST proposals seem mostly dead.) The earliest plausible time is probably the 2030s, but delays are possible. We'll know more once the 2020 decadal survey is finished.
  10. UmbralRaptor

    Sedna Usurped

    It's suggestive, but not conclusive of Planet 9. Still a neat object, and apparently stable for some amusing solar system configurations. The paper is on ArXiv, and remarkably readable. There's a decent amount of sky left to search.
  11. UmbralRaptor

    New Hubble Observations Boost Evidence For Elusive Exomoon

    The paper is currently open access. I'd recommend checking it out, since even if you can't follow all the fancy statistics there's interesting commentary. eg:
  12. UmbralRaptor

    magnetic alignment and orbital maneuver

    It is used on satellites (eg: WISE)
  13. UmbralRaptor

    Thoughts on a Cryogenic & hyperbolic's for engines?

    Cryogenics get you ~25-50% higher specific impulse than hypergolics, which can ease design considerations greatly. More subtly, the propellants easiest to mine/produce on the Moon would be cryogenic in nature. I would also strongly recommend against using hyperbole to power your rocket, as that tends to leave us stuck with fantasies instead of space travel. Insert other media
  14. UmbralRaptor

    Replying to myself because in this case bumping is worthwhile. I resorted to temporary IP blocks because, well,
  15. UmbralRaptor

    "Halo" Orbit

    As in hover over the pole? It's not an orbit, but cleverly exploiting things that aren't gravity can help: