125 lines
5.7 KiB
HTML
125 lines
5.7 KiB
HTML
<head>
|
|
<title>astro(1) - Plan 9 from User Space</title>
|
|
<meta content="text/html; charset=utf-8" http-equiv=Content-Type>
|
|
</head>
|
|
<body bgcolor=#ffffff>
|
|
<table border=0 cellpadding=0 cellspacing=0 width=100%>
|
|
<tr height=10><td>
|
|
<tr><td width=20><td>
|
|
<tr><td width=20><td><b>ASTRO(1)</b><td align=right><b>ASTRO(1)</b>
|
|
<tr><td width=20><td colspan=2>
|
|
<br>
|
|
<p><font size=+1><b>NAME </b></font><br>
|
|
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
|
|
|
|
astro – print astronomical information<br>
|
|
|
|
</table>
|
|
<p><font size=+1><b>SYNOPSIS </b></font><br>
|
|
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
|
|
|
|
<tt><font size=+1>astro</font></tt> [ <tt><font size=+1>−dlpsatokm</font></tt> ] [ <tt><font size=+1>−c</font></tt> n ] [ <tt><font size=+1>−C</font></tt> d ] [ <tt><font size=+1>−e</font></tt> <i>obj1 obj2</i> ]<br>
|
|
|
|
</table>
|
|
<p><font size=+1><b>DESCRIPTION </b></font><br>
|
|
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
|
|
|
|
<i>Astro</i> reports upcoming celestial events, by default for 24 hours
|
|
starting now. The options are:<br>
|
|
<tt><font size=+1>d</font></tt> Read the starting date. A prompt gives the input format.<br>
|
|
<tt><font size=+1>l</font></tt> Read the north latitude, west longitude, and elevation of the
|
|
observation point. A prompt gives the input format. If <tt><font size=+1>l</font></tt> is missing,
|
|
the initial position is read from the file <tt><font size=+1>/usr/local/plan9/sky/here</font></tt>.<br>
|
|
<tt><font size=+1>c</font></tt> Report for <i>n</i> (default 1) successive days.<br>
|
|
<tt><font size=+1>C</font></tt> Used with <tt><font size=+1>−c</font></tt>, set the interval to <tt><font size=+1>d</font></tt> days (or fractions of days).<br>
|
|
<tt><font size=+1>e</font></tt> Report distance between the centers of objects, in arc seconds,
|
|
during eclipses or occultations involving <i>obj1</i> and <i>obj2</i>.<br>
|
|
<tt><font size=+1>p</font></tt> Print the positions of objects at the given time rather than
|
|
searching for interesting conjunctions. For each, the name is
|
|
followed by the right ascension (hours, minutes, seconds), declination
|
|
(degrees, minutes, seconds), azimuth (degrees), elevation (degrees),
|
|
and semidiameter (arc seconds). For the sun and
|
|
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
|
|
|
|
moon, the magnitude is also printed. The first line of output
|
|
presents the date and time, sidereal time, and the latitude, longitude,
|
|
and elevation.<br>
|
|
|
|
</table>
|
|
<tt><font size=+1>s</font></tt> Print output in English words suitable for speech synthesizers.<br>
|
|
<tt><font size=+1>a</font></tt> Include a list of artificial earth satellites for interesting
|
|
events. (There are no orbital elements for the satellites, so
|
|
this option is not usable.)<br>
|
|
<tt><font size=+1>t</font></tt> Read ΔT from standard input. ΔT is the difference between ephemeris
|
|
and universal time (seconds) due to the slowing of the earth’s
|
|
rotation. ΔT is normally calculated from an empirical formula.
|
|
This option is needed only for very accurate timing of occultations,
|
|
eclipses, etc.<br>
|
|
<tt><font size=+1>o</font></tt> Search for stellar occultations.<br>
|
|
<tt><font size=+1>k</font></tt> Print times in local time (‘kitchen clock’) as described in the
|
|
<tt><font size=+1>timezone</font></tt> environment variable.<br>
|
|
<tt><font size=+1>m</font></tt> Includes a single comet in the list of objects. This is modified
|
|
(in the source) to refer to an approaching comet but in steady
|
|
state usually refers to the last interesting comet (currently
|
|
Hale-Bopp, C/1995 O1).<br>
|
|
|
|
</table>
|
|
<p><font size=+1><b>FILES </b></font><br>
|
|
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
|
|
|
|
<tt><font size=+1>/usr/local/plan9/sky/estartab<br>
|
|
</font></tt>
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
|
|
|
|
ecliptic star data<br>
|
|
|
|
</table>
|
|
<tt><font size=+1>/usr/local/plan9/sky/here<br>
|
|
</font></tt>
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
|
|
|
|
default latitude (N), longitude (W), and elevation (meters)<br>
|
|
|
|
</table>
|
|
|
|
</table>
|
|
<p><font size=+1><b>SOURCE </b></font><br>
|
|
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
|
|
|
|
<tt><font size=+1>/usr/local/plan9/src/cmd/astro<br>
|
|
</font></tt>
|
|
</table>
|
|
<p><font size=+1><b>SEE ALSO </b></font><br>
|
|
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
|
|
|
|
<a href="../man1/scat.html"><i>scat</i>(1)</a><br>
|
|
|
|
</table>
|
|
<p><font size=+1><b>BUGS </b></font><br>
|
|
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
|
|
|
|
The <tt><font size=+1>k</font></tt> option reverts to GMT outside of 1970-2036.<br>
|
|
|
|
</table>
|
|
|
|
<td width=20>
|
|
<tr height=20><td>
|
|
</table>
|
|
<!-- TRAILER -->
|
|
<table border=0 cellpadding=0 cellspacing=0 width=100%>
|
|
<tr height=15><td width=10><td><td width=10>
|
|
<tr><td><td>
|
|
<center>
|
|
<a href="../../"><img src="../../dist/spaceglenda100.png" alt="Space Glenda" border=1></a>
|
|
</center>
|
|
</table>
|
|
<!-- TRAILER -->
|
|
</body></html>
|