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If a star has a parallax of 0.20 arc seconds what is the distance to that star?
Wiki User
∙ 14y ago
I assume you mean the parallax. If the parallax is 0.1 arc-seconds, then the distance is 1 / 0.1 = 10 parsecs.
I assume you mean the parallax. If the parallax is 0.1 arc-seconds, then the distance is 1 / 0.1 = 10 parsecs.
I assume you mean the parallax. If the parallax is 0.1 arc-seconds, then the distance is 1 / 0.1 = 10 parsecs.
I assume you mean the parallax. If the parallax is 0.1 arc-seconds, then the distance is 1 / 0.1 = 10 parsecs.
Wiki User
∙ 14y ago
Wiki User
∙ 14y ago32.62 light years away from the Earth. The formula is Distance(in parsecs)=1000/Parallax in milliarcseconds. So, a parallax of .1 arcseconds is 100 milliarcseconds. That would mean a star with a parallax of .1" would be 10 parsecs away. A parsec (from the conjunction of parallax second) is about 3.26 light years.
Wiki User
∙ 10y agoThe stellar parallax for a star at 20PC distance is 1/20 of a second of angle.
That's not much of an angle. It's the apparent width of a dime that's about
46 miles away from you. I have no idea how astronomers can measure it.
This particular star is about 65.2 light years from us. This isn't all that far
when you talk about stars, and it gives us an idea of why the parallax
method of measuring distance is only useful for the nearest stars.
Wiki User
∙ 14y ago50 parsecs
because it is 1 divided by the seconds of arc (the reciprocal) so 1/0.02 = 50
Wiki User
∙ 13y agoThe reciiprocal of the parallax angle. 1 / 0.10 = 10 parsecs.
Wiki User
∙ 14y agoIf a star has a parallax of 0.20 arc seconds then it must be 5 parsecs or 16.3078 light years.
distance = 1/parallax(sec of arc) = 1/0.20 = 5 parsecs = 5 * 3.26156 = 16.3078 ly.
Wiki User
∙ 14y agoI assume you mean the parallax. If the parallax is 0.1 arc-seconds, then the distance is 1 / 0.1 = 10 parsecs.
Wiki User
∙ 12y ago25 Pc
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