Look up the parallax of star HIP 70890 on the SIMBAD astronomical database at ht
ID: 3161336 • Letter: L
Question
Look up the parallax of star HIP 70890 on the SIMBAD astronomical database at http://simbad.u-strasbg.fr/simbad/sim-fid. What is its parallax specified on this website in mas? What is the star's distance from the Earth in parsecs? If this star vanished right now, when will be find out? The New Horizons Spacecraft journeyed to Pluto at a speed of about 15 km/s. At this speed, how long would it take to go from Earth to this star (which, by the way Proxima Centauri, the closest known star to the Sun)?Explanation / Answer
A.
B.distance=1/p
where p is in arcseconds
therefore, p=768.13/1000=0.768
d=1/0.768=1.302 parsec
C. d-1.302 parsec= 1.302*3.086e+16 m=4.01755e+16m
time=4.01755e+16m/299 792 458 m / s=134011043.066seconds=
4.24 years
D.t=distance/15km/s=84665.14years=84.67millennium
Parallaxes (mas): 768.13 [1.04]Related Questions
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