Wed, 22 Dec 1999 18:55:14 -0500, "M. Lessard" <
marles@...> écrivait:
: Hi...
:
: My name is Mario Lessard and I live in Quebec,Canada. I'm a french canadian
: so forgive me for my bad english. I use Guide since 3 years from now and
: specially for variable star work (I'm an AAVSO member). I enjoy that cool
: list. Now I have a question (or a small problem). Like everybody knows,
: the Decenber full moon will be a bit bigger than usual. Yesterday, someone
: asked me how much big that moon will be relative to the November one. I
: knew that it should be pretty small in difference but to compare the size of
: the last month's full moon (Nov. 23th 02:04 EST) with the December one (22th
: 12:31 EST), I went to Guide 7.0, centered the moon for each event (at the
: same dates as above) , and clicked for "more info" at each time to check for
: the distance and the size the moon. And here's what I had :
:
: November, size of the moon : 33,84 arcmin., dist. from host planet : 352,985
: km
: December, size of the moon : 33,25 arcmin., dist.from host planet : 359,312
: km...
:
: ...hence the title of my post...is there something wrong ??? could someone
: explain ??
:
It looks like the "perigee" happens before the full moon. The following table from
Guide 7.0 gives for the last months of 1999:
Perigee: 7 Aug 1999 18:34 (366707.1 km)
Apogee: 19 Aug 1999 18:28 (404262.4 km)
Perigee: 2 Sep 1999 13:07 (369819.4 km)
Apogee: 16 Sep 1999 13:43 (404389.7 km)
Perigee: 28 Sep 1999 11:41 (366254.5 km)
Apogee: 14 Oct 1999 8:50 (405253.4 km)
Perigee: 26 Oct 1999 7:59 (360949.9 km)
Apogee: 11 Nov 1999 0:31 (406213.8 km)
Perigee: 23 Nov 1999 16:58 (357279.6 km)
Apogee: 8 Dec 1999 6:03 (406620.5 km)
Perigee: 22 Dec 1999 5:57 (356656.7 km)
Since in december, the full moon happens on dec. 22 at 12:32, that should explain the
difference..
Pierre Desjardins
Sherbrooke, Québec