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vernal equinox
Furman Metz
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When is the Sun's right ascension (RA) 18 hours?
winter solstice
One hour of right ascension is equivalent to how many degrees of sky rotation?
Depends on the declination in question. There are 24 hours of right ascension in 360 degrees, so at the celestial equator (declination = 0 degrees) 1 hour of right ascension is equal to 15 degrees. But as you increase or decrease declination the right ascension lines converge to the celestial pole (like longitude lines on a globe). The angle covered by 1 hour of right ascension is therefore equal to (15 degrees x cos(declination) ), so at the celestial poles (declination = +/- 90 degrees) 1 hour of RA is 0 degrees.
What are some suns names?
ra and amun ra are some names refering to ra the sun god also personified as the sun
What is the right ascension and declination of the brightest star in the Octans constellation?
The brightest star is v Oct with an RA of 21h 41m 28.47s and declination of −77° 23′ 22.1″
How much does the right ascension of Betelgeuse change from midnight to 6am?
It doesnt change. The RA is related to the mm/dd/yy by a factor of pi/6. Consider this from Oct21 to Dec21 when Orion is rising in the east. Good Luck..
When is the Sun's right ascension (RA) 18 hours?
winter solstice
When is the Sun's right ascension RA 0 hours?
vernal equinox
In star language what does RA stand for?
Right Ascension. It's the celestial equivalent of longitude.
When will a star with a right ascension of 1.0 hours rise?
That completely depends on the date, since the sun itself moves through all values of RA in the course of a year, and our clocks refer to the sun.
From where is the right ascension of the body measured?
Right Ascension is the 'longitude' of celestial objects. The celestial 'Prime Meridian' ... the position defined as zero RA is the celestial meridian that passes through the Vernal Equinox, and the Right Ascension of every point in the sky is measured westward from there. It's expressed in terms of hours, minutes, and decimal seconds, where 1 hour corresponds to 15 degrees of angle. Notice that unlike terrestrial longitude, Right Ascension isn't measured in both directions from the zero meridian. There's no east or west Right Ascension, only one number, that ranges from zero through 24 hours.
One hour of right ascension is equivalent to how many degrees of sky rotation?
Depends on the declination in question. There are 24 hours of right ascension in 360 degrees, so at the celestial equator (declination = 0 degrees) 1 hour of right ascension is equal to 15 degrees. But as you increase or decrease declination the right ascension lines converge to the celestial pole (like longitude lines on a globe). The angle covered by 1 hour of right ascension is therefore equal to (15 degrees x cos(declination) ), so at the celestial poles (declination = +/- 90 degrees) 1 hour of RA is 0 degrees.
What are some suns names?
ra and amun ra are some names refering to ra the sun god also personified as the sun
What is the right ascension and declination of the brightest star in the Octans constellation?
The brightest star is v Oct with an RA of 21h 41m 28.47s and declination of −77° 23′ 22.1″
How are right ascension an declination similar to latitude an longitude?
Right Ascension in space is equivalent to Longitude on Earth but it is measured in hours minutes and seconds rather than degrees, minutes and seconds. 1 hour of RA is equivalent to 15° of longitude. Declination in Space is equivalent to Latitude on Earth. Both are measure in degrees, minutes and seconds. Declination is measured from the Celestial Equator, + being north and - being south, just like Latitude.
What is the latitude and longitude of the constellation Pisces?
The terms "latitude" and "longitude" only apply to terrestrial navigation here on the surface of the Earth. In Astronomy, the terms "right ascension" and "declination" are used instead. The RA of Pisces is 1 hour and the declination is +15 degrees.
What is the duration of Ra Choi?
The duration of Ra Choi is 1.95 hours.
What is the Right Ascension of the Third Quarter Moon on April 21?
In the year 2013 . . . -- The moon is not at Third Quarter on April 21. At 0000Z on 21 Apr, it's a waxing gibbous, about 74% illuminated. Its Right Ascension is then 09h 57m . -- The last Third Quarter before April 21 occurs on April 3 at 0500Z. RA is then 18h 57m . -- The next Third Quarter after April 21 occurs on May 2 at 1300Z. RA is then 20h 53m . (Times and RAs are rounded, which, I'm guessing, will be close enough for your purposes.)
