When is earth at apogee & perigee?

On what day is the earth closest to the sun?
And what day is the earth farthest from the sun?
Do these dates change over time due to earth's precession?

-D.D.

We were closest to the Sun January 4 2004 at about 91,345,800 miles. We
will be farthest from the Sun in June if I remember right. And I don't have
a clue about your other question but I'm hoping to learn from other posts.

I did a piece in my January news letter as a factoid thing. I do a
monthly news letter to give me something specific to study each month and a
side benefit is that I can share that knowledge with my readers. (all seven
of them).

--
Michael A. Barlow
"David W. Deley" wrote in message
news:gZzXb.1374$Mf.68@okepread04...
On what day is the earth closest to the sun?
And what day is the earth farthest from the sun?
Do these dates change over time due to earth's precession?

-D.D.

We were closest to the Sun January 4 2004 at about 91,345,800 miles. We
will be farthest from the Sun in June if I remember right. And I don't have
a clue about your other question but I'm hoping to learn from other posts.

I did a piece in my January news letter as a factoid thing. I do a
monthly news letter to give me something specific to study each month and a
side benefit is that I can share that knowledge with my readers. (all seven
of them).

--
Michael A. Barlow
"David W. Deley" wrote in message
news:gZzXb.1374$Mf.68@okepread04...
On what day is the earth closest to the sun?
And what day is the earth farthest from the sun?
Do these dates change over time due to earth's precession?

-D.D.

Every moment of every day.

Regards,

Bill Ferris
"Cosmic Voyage: The Online Resource for Amateur Astronomers"
URL: http://www.cosmic-voyage.net
=============
Email: Remove "ic" from .comic above to respond

Every moment of every day.

Regards,

Bill Ferris
"Cosmic Voyage: The Online Resource for Amateur Astronomers"
URL: http://www.cosmic-voyage.net
=============
Email: Remove "ic" from .comic above to respond

On Sat, 14 Feb 2004 17:30:20 -0800, "David W. Deley" wrote:

On what day is the earth closest to the sun?
And what day is the earth farthest from the sun?
Do these dates change over time due to earth's precession?

-D.D.
http://www.windows.ucar.edu/tour/lin...th_galore.html
Good night!

Benoît Morrissette

On Sat, 14 Feb 2004 17:30:20 -0800, "David W. Deley" wrote:

On what day is the earth closest to the sun?
And what day is the earth farthest from the sun?
Do these dates change over time due to earth's precession?

-D.D.
http://www.windows.ucar.edu/tour/lin...th_galore.html
Good night!

Benoît Morrissette

On what day is the earth closest to the sun?

Hi:

What you mean is "aphelian" and "perihelion"...

The exact date varies, but, if I recall, January and July for Perihelion and
Aphelion, respectively.


Peace,
Rod Mollise
Author of _Choosing and Using a Schmidt Cassegrain Telescope_
Like SCTs and MCTs?
Check-out sct-user, the mailing list for CAT fanciers!
Goto http://members.aol.com/RMOLLISE/index.html

On what day is the earth closest to the sun?

Hi:

What you mean is "aphelian" and "perihelion"...

The exact date varies, but, if I recall, January and July for Perihelion and
Aphelion, respectively.


Peace,
Rod Mollise
Author of _Choosing and Using a Schmidt Cassegrain Telescope_
Like SCTs and MCTs?
Check-out sct-user, the mailing list for CAT fanciers!
Goto http://members.aol.com/RMOLLISE/index.html

In article gZzXb.1374$Mf.68@okepread04,
"David W. Deley" wrote:

On what day is the earth closest to the sun?
And what day is the earth farthest from the sun?
Do these dates change over time due to earth's precession?

-D.D.


Just FYI, the subject heading should be "When is Earth at apohelion and
perihelion." The words come from the Greek: "apo-" means "away from,"
"peri-" means "about" and is used for the closest point, "-gee" comes
from "ge" which is Greek for Earth, and "-helion" comes from Helios,
meaning the Sun.


So, anyway...

I just ran a quick calculation with xEphemeris* that shows Earth was at
perihelion around January 4 of this year, and will be again January 3
next year. Aphelion will occur around July 4 this year.

Matt T


* xEphemeris is an awesome app that will calculate and plot just about
any astronomical info you could want. It does, however, only run on
Unix/Linux/MacOSX operating systems.

And this reference to this app and these non-Windows OSs may unleash the
vitriol of certain readers of this group who are not mature or
self-secure enough to allow that some folks can use non-Windows systems
and do good work and be happy. Be warned, and ignore them.