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1994-12-21
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S K Y M A P
---------------
Version 2.2
---------------
V E N D O R I N F O R M A T I O N
----------------------------------------
This file provides information for Shareware Distributors,
Disk Vendors, BBS Sysops and Computer Clubs who wish to
distribute the SKYMAP package.
-----------------------------------------------------------
Part 1: Program Information:
-----------------------------------------------------------
Program Name, Category:
-----------------------
SkyMap, Windows, Astronomy Application (Disk)
Preferred File Name For BBSs Etc:
_________________________________
SkyMap is a large package, and is normally distributed as
two ZIP archives. These should be called "SKYMP22A.ZIP" and
"SKYMP22B.ZIP". If you wish, the program may be distributed
as a single file containing all the files from both archives,
in which case it should be called "SKYMAP22.ZIP".
Of course, other file name extensions are perfectly acceptable
when compression programs other than PKZIP are used.
The package must be distributed "as is". You may add your
own short promotional files to the package, but no files
must be removed from it.
Short Description:
------------------
SkyMap is a highly accurate "planetarium" for Windows 3.1.
It can draw a map of the sky, as seen from any place on Earth,
for any date between 4000BC and 8000AD, displaying stars,
planets, comets, deep-sky objects, constellation names and
figures, and a whole lot more. Detailed information about
any object on a map can be obtained simply by clicking on it
with the mouse, and high quality charts can be printed on any
printer supported by Windows. Pictures of objects, in several
formats, can be associated with objects and displayed, either
manually or automatically.
Long Description:
-----------------
SkyMap v2.2 is a shareware "Planetarium" program for Microsoft
Windows 3.1 or later. It will display a map of the sky as seen
from any point on Earth for any date between 4000BC and 8000AD.
Two different types of map can be drawn: a "Horizon" map showing
the observer's local horizon, and a "Sky Area" map showing a
detailed view of a small area of the sky. You can "zoom in" on
a map to a practically unlimited extent, and rapidly scroll
around it.
There are many planetarium programs available today. Unlike
some of these, SkyMap makes no claims of blinding calculation
speeds. Instead, what SkyMap concentrates on is accuracy.
SkyMap uses the most accurate methods available to the author
for all the calculations. This accuracy makes SkyMap equally
suited for both the novice astronomer who just wants to know
"what's that bright object up there?" and the serious amateur
or professional astronomer who wants a detailed "finder chart"
for a faint galaxy.
Examples of this accuracy are:
- Planetary positions have a mean error of less than half a
second of arc.
- Star positions are rigorously corrected for the effects of
proper motion, precession, aberration, and refraction.
Planetary positions are corrected for aberration and
diurnal parallax.
SkyMap carries out its calculations in as efficient as manner as
possible, but it never compromises accuracy for the sake of speed.
An increase in speed can always be achieved by using a faster
computer! Having said all that, the speed is still reasonable;
on the author's 33MHz 486-based PC for example, the horizon map,
with default settings, is computed and drawn in about 5 seconds.
The following information can be displayed on a map:
Stars: SkyMap uses the SAO star catalog as the source of star
data. The shareware version of the program comes with a
database of 15,925 stars down to magnitude 7; the standard
registered version of the program is supplied with a much
larger database of 88,000 stars to magnitude 8.5. A "GSC"
version of SkyMap may also be purchased; this contains the
complete SAO catalog of 259,000 stars, and also has the
ability to display stars to below magnitude 15 from the
Hubble Guide Star Catalog (GSC), available separately as
a set of two CD-ROMs. Stars can be labelled with proper
names, Bayer letters, or Flamsteed numbers.
Constellations: Constellation names, figures, and official IAU
boundaries can all be displayed.
Planets: The Sun, Moon, and planets can be displayed, labelled
with their standard astronomical symbols or names.
The Moon is displayed with the correct phase and
orientation.
Comets: The program maintains a catalog of comets, in which the
user may add, remove, and edit entries. Comets from the
catalog can be selected for display on the map.
Asteroids: The program maintains a catalog of asteroids, which
operates in an identical way to the comet catalog.
Deep Sky Objects: The complete Saguaro Astronomy Club (SAC) database
of 11,000 deep sky objects is available. This contains
the complete Messier, NGC, and IC catalogs, and the
brightest objects from more than 70 other catalogs.
Detailed selection criteria can be used to select
objects for display. Objects are shown on the map with their
correct size and (for galaxies) orientation.
Telescopes and eyepieces: The program maintains a catalog of telescopes
and eyepieces (both of which can be edited by the user).
Any eyepiece may be selected with any telescope, and the
resulting magnification and field of view displayed. A circle
showing the field of view can be displayed on the map.
Circles representing the view through a Telrad (TM) finder can be
displayed on the map.
The "track" of any moving object (planets, comets and asteroids) can be
displayed, showing where the object will be over a specified
period of time. Points on the track can be labelled with date
and the object's magnitude.
All types of object can be switched on or off with the click of
the mouse, making it easy to see exactly the information you want,
without being flooded with unwanted information.
Detailed information about any object can be obtained simply by
clicking the mouse on it. In the case of planets, the displayed
information includes both positional (RA, Dec, Distance) and
physical (Magnitude, phase, light time, elongation, phase angle
etc) information.
When you have a map as you want it, it can be printed on any type
of printer supported by Windows. The printed map is not simply a
copy of the screen; it is printed at the full resolution of the
printer. Maps printed on a laser printer compare favourably with
high-quality star atlases such as "Uranometria 2000". Maps can be
printed in either black and white or colour. If you have a colour
printer you can select the colour of each component of the map.
SkyMap can also display photographic images, supplied in the
form of GIF, BMP or PDS files. Thousands of such images are
freely available on bulletin boards and commercial information
systems such as CompuServe. This allows you to build up your own
personal library of astronomical photographs which, coupled with
the map displays, really helps to bring the sky to life. Images
can either be displayed manually, or can be linked with specific
objects and displayed by simply clicking on the object on the map.
System Requirements
-------------------
SkyMap will run on any computer supporting Windows 3.1, although a
fast 386 or a 486-based computer is strongly recommended. A maths
co-processor is not essential, but again is recommended; SkyMap does
a huge amount of trigonometry, and use of a co-processor can speed
the program up by a factor of 10 or more!
SkyMap runs under both OS/2 and Windows NT without problems.