Wiki operators
  • Content Count

  • Joined

  • Last visited

Community Reputation

546 Excellent


About UmbralRaptor

  • Rank

Contact Methods

  • Website URL Array
  • Twitter Array

Profile Information

  • Location Array
  • Interests Array

Recent Profile Visitors

3,282 profile views
  1. Local university is doing an event, though the weather is very questionable. (That typed, there are plans for streaming video if the clouds are uncooperative)
  2. This IIRC rapidly gets you into territory where there are no analytic solutions. You'll want to use a numeric integrator for the burn (eg: writing a script in Python) to work out how long the burn time is, and what sort of angle the ship will pass through. I suspect that you can tell on success *before* SOI transition by working out the transfer with patched conics, and when your specific energy (0.5*v^2 - GM/r) reaches that.
  3. Note that for our purposes, Venus and Mars are "Earthlike", so be careful not to take "habitable" too literally. You might think so, but it totally works for KELT. WASP and TESS aren't *that* much bigger, also.
  4. Kind of a bump/update: some people determined what it would take to intercept C/2019 Q4: Anyone got a spare HLV?
  5. Those tend to be fit with parabolas, and depending on reference frame may only have an eccentricity above 1 once you have a bunch of sig figs. For example: Anyway, the 3 highest eccentricities: C/1980 E1 (Bowell) at 1.0575, 1I/ʻOumuamua at 1.19951, and C/2019 Q4 (Borisov) at... still being determined but probably above 3.
  6. It's actually quite possible. eg:
  7. So, uh, do you have a mathematical model?
  8. This works, well, and was what we did before maneuver nodes existed. I just want to add 2 things: 1) Ideally you want to burn just before Munrise, though this isn't a big deal if you have a bit of ΔV reserve. Careful checking of the map view helps. 2) If you get your apoapsis to 14 Mm, you get a free-return trajectory. Albeit with a somewhat distant flyby IIRC.
  9. Assuming that you have making history installed, and alternate launch sites enabled, mouse under the launch button in the VAB to select woomerang and dessert launch site. Ditto in the SPH to select dessert airfield and island runway. Also shown here: Since both dessert sites are in the desert, a modest side hop will let you land there. Think a command pod with all the instruments you have unlocked, a parachute, and an RT-5 with the lowest amount of fuel. If this isn't an option, or you mean Mun or Minmus, then we'll want to talk about orbital transfers. eg: Do you have patched conics and/or maneuver nodes unlocked?
  10. I suspect that you can if you unlock surface samples, though otherwise is iffy. Also the KSC biomes are annoying to get to until you have wheels unlocked. (granted, there's lots to be gotten by careful use of an RT-5). That typed, I would suggest that @jpinard try grabbing science from high Kerbin orbit (>250 km), and any missing altitudes below it (flying low is <18 km, flying high is 18-70 km). If they have Making history, woomerang, dessert launch site, dessert runway, island runway and the desert biome proper are amazingly easy to get science from. And unless they're doing a challenge of some sort, get science from Mun or Minmus as soon as possible.
  11. It depends on the experiment. eg: Crew reports in near space are global, but EVA reports are per biome.
  12. Closer than Proxima Centauri (1.3 pc)? Very unlikely for a brown dwarf and questionable for a jupiter, though there remains the possibility of medium or small planets in the oort cloud. That said, we still have some gaps in what's slightly farther out..
  13. I've occasionally poked at analytic approximations with hyperbolae and adding vectors, but have no idea how they compare with proper numeric simulations. That said... Approximately 0. To get speeds useful for interstellar travel, you need to do a close flyby of a close in binary system with neutron stars and/or blackholes. A 0.63 au flyby of a sunlike star will not meaningfully bend your trajectory. (And even if you skim A's photosphere, you're looking at <6 arcminutes of deviation from a straight line!)
  14. I assume that they don't want the embarrassment of being the next Xavier Dumusque.