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lo for the light speed

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#1 k.s.min

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Posted 23 May 2019 - 04:11 PM

lnspired  by  [Jupiters moons tracked over 17 days  by  Chiron]......

l  decided  to  challenge  again  to  seek  the  light  speed  by  Roemer,s  way.

l  guess  that  Roemer  maybe  used  very  crude  instrument  such  as  2"  or  3"  refractor(Gallillean ?).

 

For  this  purpose  l  must  follow,track  lo's  position  for  some  months(like  Roemer  or unless,  its  interval ( this  case   for  easy) ...it  need   physical  health...moreover  the  Jupiter,s  position(low)  is  not  good .

lf  failed, must  wait  untill  Jupiter  rises  high.

 

.....#  Using  sketch data  of  lo's  move  this  night  l  could  seek  lo's  velocity  as  12.4km/sec ( 17km/sec  on  paper...... as  l  used  only  my  ordinary  eyepieces  without  micrometer  etc. )....also  lf  possible   lt'll be  desirable  to  seek  myself  lo's  rotation  period  even  at  years  or  decades  interval  to  find  its  possibility  of  change  of  period.   

 

==================================================================

atlasm20190524_043443 - 복사본.jpg

 

 

 

 

 


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#2 Astroman007

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Posted 23 May 2019 - 05:10 PM

^ I like this little project of yours, OP.

 

Keep it up and report on its progress.



#3 Special Ed

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Posted 24 May 2019 - 08:46 AM

k.s.,

 

Nothing like a good, long term project to keep oneself out of trouble.  smile.gif   I like your illustration--it helps to understand how you're accomplishing this.



#4 niteskystargazer

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Posted 25 May 2019 - 10:13 AM

K.S.

 

Good sketch of  lo for the light speed smile.gif .

 

CS,KLU,

 

thanx.gif ,

 

Tom



#5 k.s.min

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Posted 29 May 2019 - 01:01 AM

2222크기변환_001.jpg l must correct that [lo's body 50% escaping time] was 02:47 on the sketch...not 02;52;24.
l,m tracking lo every clear night for the topic.
l guess Roemer used so poor instrument such as singlet small refractor or aery refractor...comparing with it mine is now too rich to find the light speed just in only 18days as l draw, show here the aerial view of the [sun-- earth--jupiter] system.

l reallized that to find the angle [A] or the lenghth [Y] is the most important.

For 18days the Earth moves [Z], also the distance between Earth--Jupiter changes as from [Y] to [X].

so, light must travel more shorter as [Y - X] on the night of opposition.....than on the night when l observed lo's contact on May24 02;49.

Could somone help me to seek the angle [A] or the value[Y-X]...?

Edited by k.s.min, 29 May 2019 - 01:07 AM.


#6 k.s.min

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Posted 29 May 2019 - 09:30 AM

For  16days  can  l  find  the  speed  of  light.....???

 

l  could  get  the  value  of  [y - x] =  1,338,000km  from  pythagoras  equation.

 

y=  root [x*2+ y*2]

  =root  [41,182,000km*2  +  628,402,000km*2 ]

  =root  [16,957,924x100000000km  +  3,948,865,600x100000000km]

  =629,740,000km

x =  5.2AU - 1 AU

   =  628,402,000km

 

therefore,

y-x = 1,338,000km.......................this  is  the  distance  for  the  light  need  to  pass  only  for  4.46seconds......At  nearest  opposition  on   Jun 9 ,  l  can  see  the  same  location -  lo' s  contact  with  delayed     time  only  4.46seconds (delay  than  predicted  time) ........................... impossible  to  measure  with  any  apparatus  in  the  world(l  need  at  least  several  minutes  of  value).

pls  sombody  might  check  my  computations,.



#7 k.s.min

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Posted 31 May 2019 - 12:48 AM

l have to enlarge the gap from 16-18days to 2-3 months to make enough value of delay.
One of the most important factor is that the orbital period of lo must always constant. yes, l bilieve in lo,s period don,t change even in some seconds or a minutes for a billion ryears, or at least for a million years. lts value is nowadays 1day 18hours 27minutes 30second which l'll use to predict the final day(observation night) xxmonth xxday xxo'clock xx mins xx secs by adding everyday from to the time (o,clock--) of the very first limb contact time l observed.
ofcourse l use apps to track & help my project.... apps are not precise for the contacting time....eyepiece is precise.
Dose the apps made with plus-minus the delay times according  to light travel month to month...?


Edited by k.s.min, 31 May 2019 - 12:52 AM.



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