Fractional degrees?
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Topic authorNuclearVacuum
- Posts: 41
- Joined: 15.09.2008
- Age: 34
- With us: 16 years 1 month
Fractional degrees?
I was wondering if there was a clear way to convert the normal coordinates into fractional degrees.
Я люблю экзопланет
Re: Fractional degrees?
What do you mean by "normal coordinates"?
fwiw,
1 hour = 60 minutes (of time) = 3600 seconds (of time) = 15 degrees (of angle)
1 minute (of time) = 60 seconds (of time)
also 1 minute (of angle) = 60 seconds (of angle)
and 1 degree = 3600 seconds (of angle)
so 10 h 30m 30s = 10 + 30/60 + 30/3600 = 10.5083 hours = 157.6245 degrees
and 10 degrees 30m 30s = 10.5083 degrees = 0.70055 hours
but I don't know if that's related to your question.
fwiw,
1 hour = 60 minutes (of time) = 3600 seconds (of time) = 15 degrees (of angle)
1 minute (of time) = 60 seconds (of time)
also 1 minute (of angle) = 60 seconds (of angle)
and 1 degree = 3600 seconds (of angle)
so 10 h 30m 30s = 10 + 30/60 + 30/3600 = 10.5083 hours = 157.6245 degrees
and 10 degrees 30m 30s = 10.5083 degrees = 0.70055 hours
but I don't know if that's related to your question.
Selden
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Topic authorNuclearVacuum
- Posts: 41
- Joined: 15.09.2008
- Age: 34
- With us: 16 years 1 month
Re: Fractional degrees?
I think this can help me out a little. Also, my apologizes for my language. I am so used to the "h-m-s" way of coordinants, that this fractional degrees was completely new to me. So in my mind, I call it abnormal.
Я люблю экзопланет
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Topic authorNuclearVacuum
- Posts: 41
- Joined: 15.09.2008
- Age: 34
- With us: 16 years 1 month
Re: Fractional degrees?
Just let me see if I have this right.
h = hour
m = minute ( ' )
s = second ( " )
d = degree
f = Fractional degree
RA: h + m / 60 + s / 3600 = x * 15 = f
Dec: d + m / 60 + s / 3600 = f
h = hour
m = minute ( ' )
s = second ( " )
d = degree
f = Fractional degree
RA: h + m / 60 + s / 3600 = x * 15 = f
Dec: d + m / 60 + s / 3600 = f
Я люблю экзопланет
Re: Fractional degrees?
If the declination is less than zero, it becomes d-m/60-s/3600
Re: Fractional degrees?
To clarify, a Declination of
-6d 30m 15s
would mean that it's in the southern hemisphere, slightly more than 6.5 degrees below the equator.
In other words, the minus sign applies to the entire expression, not only to the degree value.
The resulting fractional value would be
- (6 + 30/60 + 15/3600)
(a slight algebraic manipulation of what ajtribick wrote)
-6d 30m 15s
would mean that it's in the southern hemisphere, slightly more than 6.5 degrees below the equator.
In other words, the minus sign applies to the entire expression, not only to the degree value.
The resulting fractional value would be
- (6 + 30/60 + 15/3600)
(a slight algebraic manipulation of what ajtribick wrote)
Selden