A1-A4 are spaced around the aft structure of the spacecraft. ...B1-B4 fire laterallyC1-C4 fire forward
Quote from: dunderwood on 08/13/2018 03:24 amIt's not quite as close as Lupi was, but I was able to get a few shots of launch last night as well. https://dunder.smugmug.com/Rocketry/Parker-Solar-Probe/First time seeing a Heavy in person. A little more moonlight would have been nice, but it was still an amazing experience. Your angle was about the same as mine, where did you end up? I was at like... the furthest West part of the NASA Causeway.I like the brush in the foreground on yours, it really frames it well!
It's not quite as close as Lupi was, but I was able to get a few shots of launch last night as well. https://dunder.smugmug.com/Rocketry/Parker-Solar-Probe/First time seeing a Heavy in person. A little more moonlight would have been nice, but it was still an amazing experience.
From https://ssd.jpl.nasa.gov/horizons.cgi#resultsParker Solar Probe 12.aug 2018 8:17 Center body name: Earth (399)v= 14,89 km/sdist xyz 11 488,91 kmresultcharacteristic energy C3=152,21 km2/s2Vinf=12,337 km/snot reported 153,79 in pdfNew Horizons 19.jan 2006 19:52v= 14,77 km/sdist xyz 13 213,95 kmC3= 157,74 km2/s2Vinf=12,559 km/s
Quote from: lamid on 08/20/2018 09:29 amFrom https://ssd.jpl.nasa.gov/horizons.cgi#resultsParker Solar Probe 12.aug 2018 8:17 Center body name: Earth (399)v= 14,89 km/sdist xyz 11 488,91 kmresultcharacteristic energy C3=152,21 km2/s2Vinf=12,337 km/snot reported 153,79 in pdfNew Horizons 19.jan 2006 19:52v= 14,77 km/sdist xyz 13 213,95 kmC3= 157,74 km2/s2Vinf=12,559 km/sSomething I've been wondering:If Parker Solar Probe is only slightly more massive than New Horizons, than how did 'Horizons get slightly more C3 than Parker even though Parker launched from a much larger LV?
Now how much does the Star 48 add? PSP = 685 kg. Star 48 initial mass = 2114 kg, end mass = 114 kg (this is not the exact Star variant, but close enough). So start mass = 685+2114 = 2799, end mass 685+114 = 799. Delta V at ISP 283 is then 283*9.8*ln(2779/779) = 3477 m/s.
How much delta V from the kick burn? NH mass = 478kg, Star48 initial mass = 2141 kg, burnout mass = 131 kg, ISP=292. So initial mass is 2619 kg, final mass 609 kg, and dv = 292*9.8*ln(initial/final) = 4,174 m/s.