hpcalc.org - HP 49/50 Archive

HP 49/50 Astronomy Programs

The first size listed is the downloaded file size and the second size listed is the size on the calculator.

There are 39 files totaling 14,626 KB in this category.

Above 1.05   (details) 49/50 ENG   32 KB / 29 KB
ScreenshotGenerates sky charts, text lists, and predictions of satellites, sun, moon, planets and stars. Now parses current Celestrak files, with the indicators [-], [+], and [P] in the satellite names. Designed for the 49g+ and 50g. Now stores satellite preferences on the SD card, so you can keep different constellations on different SD cards. This old version is maintained because it also works on the 49g+.
By Albert P. Gerheim. 2012-12-25

Above 2.0   (details) 49/50 ENG   34 KB / 31 KB
ScreenshotGenerates sky charts, text lists, and predictions of satellites, sun, moon, planets and stars. Now parses current Celestrak files, with the indicators [-], [+], and [P] in the satellite names. Designed for the 50g. Now stores satellite preferences on the SD card, so you can keep different constellations on different SD cards. Version 2.0 uses the serial port of the 50g to communicate with a GPS receiver in NMEA mode or with a Kenwood TH-D7A(G) (or equivalent) Data Radio. New features include extracting time and position data from a GPS receiver, and triggering beacon transmissions from the Data Radio to coincide with satellite availability.
By Albert P. Gerheim. 2007-08-04

ALBW 1.1   (details) 49/50 48 ENG   3 KB / 1 KB
ScreenshotALBW = Allocated Bandwidth. This is a program for satellite communication engineers and planners. It determines the amount of bandwidth required to accommodate a carrier signal on a satellite transponder, given the data rate, coding, and modulation methods. Version 1.1 incorporates occupied bandwidth.
By Mike Richards. 2001-03-02

ASTR   (details) 49/50 ENG   30 KB / 14-36 KB
ScreenshotA collection of astronomy and calendar functions: position, rise, culmination and set time and location for sun, moon and planets, moon phases, calendar, holy days, Julian day, coordinate and time conversions, general rise and set time, daylight saving time switch, great circle distance, compass function.
By Martin A. Lang. 2000-01-28

ASTRO2012 3.0   (details) 49/50 48 ENG   105 KB / 57-112 KB
ScreenshotPosition of the Sun, Moon, 9 major planets+xena. Theories VSOP87B + TOP2010A + corrections from DE422. Date of Easter. Positions of the main satellites of Jupiter, Saturn, Uranus. Comets: Parabolic-Hyperbolic-Elliptic motion. Precession formulae valid +/-200,000 years from J2000. Phases of the Moon.
By Jean-Marc Baillard. 2018-02-27

AstroLib 4.1   (details) 49/50 ENG   15 KB / 21 KB
ScreenshotProvides functions for setting the local time variable, the Dead Reckoning position, Long and Lat and, from these variables, computing the positions, magnitudes, and phases of the stars, planets and moon, and more. Requires DateLib.
By Robert H. Parry and Khanh-Dang Nguyen Thu-Lam. 2006-02-22

COSMO 1.0   (details) 49/50 48 ENG   11 KB / 6 KB
Contains several programs to compute the age (and period) of the universes and the distances of a galaxy knowing its redshift. Empty universes, Tolman universes, cyclic universes and our universe(?). They employ Carlson elliptic integrals and numerical integration.
By Jean-Marc Baillard. 2021-09-12

Digital Setting Circles 2.0   (details) 49/50 ENG   16 KB / 17 KB
ScreenshotAllows anyone with a telescope equipped with an equatorial mount and setting circles to point and view without any polar alignment. The need for polar alignment is eliminated by a unique system which relies on 2 guide stars.
By Arnold Moy and Khanh-Dang Nguyen Thu-Lam. 2006-02-22

EPHE 2.13   (details) 49/50 48 ENG FRA ESP   406 KB / 92 KB
ScreenshotComputes ephemeris of the sun, planets, the moon, stars, Messier objects, comets, and asteroids. Program allows all kind of coordinates, and also gives distance, magnitude, apparent diameter, phase and rising/transit/setting times. Includes version 2.13 for the 49G/49G+/50G, 1.33 for the 48S/SX and 48G/G+/GX, and full PDF documentation.
By Jean Philippe Eimer. 2007-09-25

EPHE-SysRPL 2.11S-2   (details) 49/50 ENG FRA ESP   83 KB / 63 KB
ScreenshotModified version of EPHE, written by Jean Philippe Eimer. Most routines have been converted to System RPL, hence a faster program. This version only works with the HP 49G/g+.
By Khanh-Dang Nguyen Thu-Lam. 2006-02-02

Ephemerid 5d   (details) 49/50 ENG   19 KB / 33 KB
ScreenshotAstronomical program, including Julian Day/Date calculation, weekday (from year -4712 with no future limit), season begin and end, and tropical year according to VSOP2013 theory. Accurateness within about 60 seconds with the year range -1000 to +3000.
By Gil Campart. 2023-05-07

Gravitational Lensing   (details) 49/50 ENG   23 KB / 28 KB
Einstein's General Theory of Relativity demonstrates that a large mass can deform spacetime and bend the path of light. So, a very massive object, such as a cluster of galaxies can act as a gravitational lens. When light passes through the cluster from an object lying behind it, the light is bent and focused to produce an image or images of the source. The image may be magnified, distorted, or multiplied by the lens, depending upon the position of the source with respect to the lensing mass. The characteristics of the gravitationally lensed image depend upon the alignment of the observer, the lens and the background object. If the alignment is perfect, the resulting image is an Einstein Ring. With this program, one can draw images to see the effect of gravitational lensing. You can easily test the effects of several parameters by changing them and redrawing the image. For the ARM-based calculators only.
By Wouter Dhondt. 2008-08-09

Great Circle 2.0   (details) 49/50 ENG   4 KB / 1 KB
Calculates the great circle distance, in kilometers, between two points on Earth given their latitude and longitude.
By William Mackenzie. 2016-08-02

HO229 2.0   (details) 49/50 ENG   2 KB / 2 KB
ScreenshotThis program will replace all six volumes of the Sight Reduction Tables for Marine Navigation. Since the data in the tables is purely mathematical they never go out of date. The tables are used by knowing LHA, Latitude and Declination and they return HC and Z. Version 2.0 has been rewritten in System RPL for much better performance and a slightly better interface.
By Ben Manthey. 2005-05-27

HPCompass   (details) 49/50 ITA   140 KB / 1 KB
ScreenshotThis program show the sun's track and allows you to find north.
By Giuseppe Belfiore. 2009-06-27

HPlanétarium 3.08   (details) 49/50 48 39/40 ENG FRA   457 KB / 43 KB
ScreenshotHPlanetarium is a free (GPL) planetarium for the HP 39/40/48G/49/50 in which you can move, zoom and unzoom the sky map "in real time". Equatorial/azimutal coordinates, rise/transit/set times, elongation, magnitude and diameter can be computed for main planets. You can also point a Meade telescope, and there is an ephemeris generator. Source code for the HP 49 is provided. A light version (only 24 KB) is available for the HP 48G.
By Khanh-Dang Nguyen Thu-Lam. 2006-12-23

JMOON 2.0   (details) 49/50 ENG   7 KB / 7 KB
ScreenshotJMOON2 allows you to view present, past and future positions of Jupiter's most commonly known moons (Callisto, Europa, Io, Ganymede).
By Arnold Moy and Khanh-Dang Nguyen Thu-Lam. 2006-02-22

Moon Phase Calculation 1.0   (details) 49/50 ENG   98 KB / 2 KB
ScreenshotMoon is a small program to calculate and display the moon phases. It uses the drawing routines provided by Craig Finseth's phase of the moon program (with the modifications to FLIP as suggested by Preston Brown and Juri Munkki), but has an adapted version of the very complicated phase calculation in John Walker's moontool application on the SUN.
By Dan Gerson and Emiliano Llano Díaz. 2012-09-15

MOON6Pt-2005 1.0   (details) 49/50 ENG ITA   242 KB / 82 KB
ScreenshotAstronomy program with around 130 tools. Requires (and includes) Lupa for viewing information. Partially based on older astronomy programs for the 48.
By Montori Giuseppe and others. 2005-06-14

Orbit Determination 1.0   (details) 49/50 48 ENG   41 KB / 16 KB
Determines orbits using the method of Gauss-Herrick-Gibbs for 3 observations and Herget's method for more than 3 observations. Has different utilities to calculate the position of a comet or asteroid. Supports dates in Gregorian or Julian calendar. Accurate position of the Sun.
By Jean-Marc Baillard. 2015-07-26

OUTP   (details) 49/50 48 ENG   6 KB / 4 KB
Computes the heliocentric ecliptic coordinates of Jupiter, Saturn, Uranus, Neptune and Pluto (outer planets) between 2020/12/31 0h TT and 2022/01/19 0h TT. The longitudes L & latitudes B are referred to the mean ecliptic of the date. The precision is better than 10^(-6) degree for L & B and better than 2x10^(-8) AU for the distance R between the Sun & the planet. They are computed by polynomials fitted to JPL DE431.
By Jean-Marc Baillard. 2021-01-17

Plasy   (details) 49/50 ENG DEU   29 KB / 1 KB
ScreenshotA convenient overview of the latest physical and geometrical data of our planetary system in a two-page menu. Updated according to the latest data (November 2001).
By Wolfgang Rautenberg. 2003-12-28

QVSOP 1.01   (details) 49/50 ENG   41 KB / 17 KB
Faster planet positions for 1998-2025. Originally designed for use with Urania but works independently. Includes source code. Based on a User RPL program by Keith Farmer.
By Georg Zotti. 2000-04-29

SATCO 3.1.1   (details) 49/50 48 ENG   381 KB / 51 KB
ScreenshotProvides satellite communications link budgeting, antenna siting, and sun interference calculations for geosynchronous satellites. Generates horizon profile drawings and predicted spectrum analyzer traces. Calculates antenna parameters, and bandwidth allocations. Provides for direct conversion and calculation of decibels and carrier to noise ratios. Compatible with 48GX, 48G+, 49G, 49g+, 48gII, and 50g.
By Mike Richards. 2005-09-03

SatDish 1.1   (details) 49/50 48 ENG   40 KB / 2 KB
ScreenshotA program to determine the transmit gain, receive gain, and figure of merit (G/T) of a parabolic satellite communications antenna. It uses antenna diameter, efficiency, transmit frequency, receive frequency, and receive system noise temperature as inputs. Although developed for satellite communications, it should work with any parabolic antenna system.
By Mike Richards. 2005-06-04

SATlt 1.3   (details) 49/50 ENG   71 KB / 7 KB
ScreenshotLight version of SATCO, a geosynchronous orbit satellite communications calculator. It provides basic information to help with antenna siting and alignment. It also predicts solar conjunctions (sun interference). Version 1.3 includes satellite and city databases.
By Mike Richards. 2002-03-31

Sparcom Celestial Navigation Pac 2.5.1   (details) 49/50 48 ENG   6,101 KB / 128 KB
ScreenshotThis is the Sparcom Celestial Navigation Pac based on the celnav.lib by the original author. The package contains a dump of the original card for use in HP 48 emulators or on a memory card, the port of the software to the 49/50 as a library, and the scanned manual as a PDF. The dump is compatible with the 48SX/48GX; the library is compatible with the 49g+/50g. Redistributed with the permission of the family of Dr. Thomas Metcalf.
By Thomas R. Metcalf and Eddie C. Dost. 2012-12-25

Sparcom Celestial Navigation Pac (50g Patch)   (details) 49/50 ENG   81 KB / 128 KB
ScreenshotThis is a modified version of the Sparcom Celestial Navigation Pac, patched to work on the 49/50 and virtual machines. It includes these improvements: better display formatting, ADV program now reaches the expected result and it can run on real or virtual machines.
By Thomas R. Metcalf, Eddie C. Dost, and Andres Capdevila. 2023-05-13

StarMaHP 3.2   (details) 49/50 ENG   81 KB / 78 KB
ScreenshotGives a feel for what the sky will look like tonight, next week, last year, or whatever, for beginning astronomers. Includes over 650 stars from all 88 constellations, plus the highly accurate mean positions of the sun, moon, and all 9 planets. It also has zoom features for viewing smaller areas of the sky, solar eclipses, etc, and can correct for light time and parallax.
By Dennis Straley. 2000-11-25

SUN 1.0   (details) 49/50 ENG   3,974 KB / 1 KB
ScreenshotComputes sunrise, sunset, and meridian.
By William Mackenzie. 2020-04-11

Sun 1.75   (details) 49/50 DEU   85 KB / 8 KB
ScreenshotSun and moon program. For the sun, calculates sunrise and sunset, coordinates, and sun compass. For the moon, calculates culmination coordinates, phase, and distance to the earth. System RPL and User RPL versions included.
By Heiko Arnemann. 2006-05-27

Sunrise, Solar Noon, Sunset 1.0   (details) 49/50 ENG   3 KB / 8 KB
ScreenshotRPL programs to calculate sunrise, solar noon and sunset times based on date, latitude, longitude, elevation and timezone.
By Andras Cser. 2023-05-07

TruHPoint 1.0   (details) 49/50 ENG   15 KB / 7 KB
ScreenshotProvides satellite antenna pointing angles with 3 decimal point accuracy. Allows accurate calibration of antenna tracking systems. Based on Intelsat Earth Station Standard (IESS) 412.
By Mike Richards. 2002-03-31

Urania Documentation 2.1   (details) 49/50 48 ENG   308 KB
Documentation for use with the Urania/48 Libre and Urania/49 Libre libraries. In PDF format. Now available for free use.
By Georg Zotti. 2017-10-22

Urania Supplemental Disk   (details) 49/50 48 ENG   346 KB / 1+ KB
Supplemental collection of programs for use with the Urania/48 Libre and Urania/49 Libre libraries.
By Georg Zotti. 2017-10-22

Urania/49 Libre 2.1   (details) 49/50 ENG   222 KB / 128-424 KB
ScreenshotThe Astronomical Companion: an almost complete and expandable implementation of the book "Astronomical Algorithms" written by the well-respected expert Jean Meeus. It is intended mainly for observation preparation and field use, but also for historical research. Now the full version is available for free.
By Georg Zotti. 2017-10-22

W-Weibull 3.2008   (details) 49/50 ESP   757 KB / 11 KB
ScreenshotThis program calculates the probability of dividing ceramic by the Weibull model.
By Tony Wiljanden Parada Trujillo. 2008-08-09

XTime 1.1   (details) 49/50 48 ENG   21 KB / 14 KB
ScreenshotExtended Time, Date, Calendar and Astronomical routines for the HP 48G(X) and 49G(+). Part of these routines are ported from the invaluable HP-41C CALENDARS Users' Library Solutions. The astronomical routines include calculation of times of sunrise, transit and sunset, moon phases, and seasons.
By Marco J. de Vries. 2008-08-30

XTime49 2.1   (details) 49/50 ENG   296 KB / 17 KB
ScreenshotCalendar time and astronomical routines for the HP 49G(+). Part of these routines are ported from the invaluable HP-41C CALENDARS Users' Library Solutions. The astronomical routines include calculation of times of sunrise, transit and sunset, moon phases, and seasons. Version 2 is more user friendly than version 1.1 in that INFORM and INPUT forms and a CHOOSE box have been written for the most important conversions. In version 2.1 user input is further improved. The separate subroutines have been maintained for those who want to use them for their own calculations.
By Marco J. de Vries. 2004-07-05

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