STARMONKEY HAS CREATED TWO ASTRONOMICAL APPLICATIONS


SOLAR 3D DYNAMICS  INTERACTIVE HIGH PRECISION MODEL
MINIMUM SYSTEM REQUIREMENTS
MANUFACTURER  MODEL  FPS@MIN_MODEL(max 35)*  FPS@FULL_MODEL(max 35)*  Windows**  Ubuntu** 
NVIDIA 
GEFORCE GTX 550 GEFORCE GTX 660 GEFORCE GTX 760 GEFORCE 960M GEFORGE 940MX 
35 35 35 35 24 
35 35 35 21 12 
yes yes yes yes yes 
no yes (nvidia) yes (nouveau/nvidia) no no 
XFX 
Radeon R7950 
35 
35 
yes 
no 
AMD 
R5 Radeon HD7400 
14 14 
7 6 
yes yes 
no no 
* can differ depending on hardware setup 
** as mentioned in minimum system requirements 
WOULD YOU LIKE TO KNOW
SOME MORE FACTS ON STARMONKEY
19 May 2016  Release Notes for StarMonkey v2.0
12 March 2015  Release Notes for StarMonkey v1.0.1
Object catalogue
Object type
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TIME Prior to 1962, times are UT1. Dates thereafter are UTC. Any "b" symbol in the 1stcolumn denotes a B.C. date. Firstcolumn blank (" ") denotes an A.D. date. Calendar dates prior to 1582Oct15 are in the Julian calendar system. Later calendar dates are in the Gregorian system. Time tags refer to the same instant throughout the universe, regardless of where the observer is located. The dynamical Coordinate Time scale is used internally. It is equivalent to the current IAU definition of "TDB". Conversion between CT and the selected nonuniform UT output scale has not been determined for UTC times after the next July or January 1st. The last known leapsecond is used over any future interval. NOTE: "n.a." in output means quantity "not available" at the printtime. R.A._(ICRF/J2000.0)_DEC = J2000.0 astrometric right ascension and declination of target center. Adjusted for lighttime. Units: HMS (HH MM SS.ff) and DMS (DD MM SS.f) R.A._(aapparent)__DEC. = Airless apparent right ascension and declination of the target center with respect to the Earth trueequator and the meridian containing the Earth true equinox of date. Adjusted for lighttime, gravitational deflection of light, stellar aberration, precession & nutation. Units: HMS (HH MM SS.ff) and DMS (DD MM SS.f) dRA*cosD d(DEC)/dt = The rate of change of target center apparent RA and DEC (airless). d(RA)/dt is multiplied by the cosine of the declination. Units: ARCSECONDS PER HOUR Azi_(aappr)_Elev = Airless apparent azimuth and elevation of target center. Adjusted for lighttime, the gravitational deflection of light, stellar aberration, precession and nutation. Azimuth measured North(0) > East(90) > South(180) > West(270) > North (360). Elevation is with respect to plane perpendicular to local zenith direction. TOPOCENTRIC ONLY. Units: DEGREES dAZ*cosE d(ELV)/dt = The rate of change of target center apparent azimuth and elevation (airless). d(AZ)/dt is multiplied by the cosine of the elevation angle. TOPOCENTRIC ONLY. Units: ARCSECOND/MINUTE X & Y satellite coordinates & position angle = Satellite differential coordinates WRT the primary body along with the satellite position angle. Differential coordinates are defined in RA as X=[(RA_sat  RA_primary)*COS(DEC_primary)], in DEC as Y=(DEC_satDEC_primary). NonLunar satellites only. "SatPANG" is the angle from the North Celestial Pole measured counterclockwise (CCW, or east) to a line from primary/planet center to satellite center. Units: ARCSECONDS (X & Y) and DEGREES (position angle) L_Ap_Sid_Time = Local Apparent Sidereal Time. The angle measured westward in the body trueequator ofdate plane from the meridian containing the bodyfixed observer to the meridian containing the true Earth equinox (defined by intersection of the true Earth equator of date with the ecliptic of date). TOPOCENTRIC ONLY. Units: HH MM SS.ffff. amass mag_ex= RELATIVE optical airmass and visual magnitude extinction. Airmass is the ratio between the absolute optical airmass for the targets refracted CENTER point to the absolute optical airmass at zenith. Also output is the estimated visual magnitude extinction due to the atmosphere, as seen by the observer. AVAILABLE ONLY FOR TOPOCENTRIC EARTH SITES WHEN THE TARGET IS ABOVE THE HORIZON Units: None (airmass) and magnitudes (extinction). APmag Sbrt = Suns approximate apparent visual magnitude & surface brightness. APmag= M  5 + 5*log10(d), where M= 4.83 and d= distance from Sun in parsecs. Units: MAGNITUDE & VISUAL MAGNITUDES PER SQUARE ARCSECOND Illu% = Fraction of target circular disk illuminated by Sun (phase), as seen by observer. Units: PERCENT Def_illu = Defect of illumination. Maximum angular width of target circular disk diameter not illuminated by the Sun. Units: ARCSECONDS angsep/v = Targetprimary angular separation and visibility. The angle between the center of target object and the center of the primary body it revolves around, as seen by the observer. Units: ARCSECONDS Nonlunar natural satellite visibility codes (limbtolimb): /t = Transitting primary body disk, /O = Occulted by primary body disk, /p = Partial umbral eclipse, /P = Occulted partial umbral eclipse, /u = Total umbral eclipse, /U = Occulted total umbral eclipse, / = Target is the primary body, /* = None of above ("free and clear") Angdiam = The equatorial angular width of the target body full disk, if it were fully visible to the observer. Units: ARCSECONDS Oblon Oblat = Apparent planetographic ("geodetic") longitude and latitude (IAU2009 model) of the center of the target disk seen by the observer at printtime. This is NOT exactly the same as the "subobserver" (nearest) point for a nonspherical target shape, but is generally very close if not an irregular body shape. Light traveltime from target to observer is taken into account. Latitude is the angle between the equatorial plane and the line perpendicular to the reference ellipsoid of the body. The reference ellipsoid is an oblate spheroid with a single flatness coefficient in which the yaxis body radius is taken to be the same value as the xaxis radius. For the gas giants Jupiter, Saturn, Uranus and Neptune, IAU2009 longitude is based on the "System III" prime meridian rotation angle of the magnetic field. By contrast, pole direction (thus latitude) is relative to the body dynamical equator. There can be an offset between the magnetic pole and the dynamical pole of rotation. Positive longitude is to the EAST. Units: DEGREES Sllon Sllat = Apparent planetographic ("geodetic") longitude and latitude of the Sun (IAU2009) as seen by the observer at printtime. This is NOT exactly the same as the "subsolar" (nearest) point for a nonspherical target shape, but is generally very close if not an irregular body shape. Light traveltime from Sun to target and from target to observer is taken into account. Latitude is the angle between the equatorial plane and the line perpendicular to the reference ellipsoid of the body. The reference ellipsoid is an oblate spheroid with a single flatness coefficient in which the yaxis body radius is taken to be the same value as the xaxis radius. For the gas giants Jupiter, Saturn, Uranus and Neptune, IAU2009 longitude is based on the "System III" prime meridian rotation angle of the magnetic field. By contrast, pole direction (thus latitude) is relative to the body dynamical equator. There can be an offset between the magnetic pole and the dynamical pole of rotation. Positive longitude is to the EAST. Units: DEGREES SN.ang SN.ds = Target subsolar point position angle (CCW, or east, with respect to the direction of the trueofdate Celestial North Pole) and its angular distance from the subobserver point (center of disk) at print time. Negative distance indicates subsolar point on hidden hemisphere. Units: DEGREES and ARCSECONDS NP.ang NP.ds = Targets North pole position angle (CCW, or east, with respect to direction of trueofdate Celestial North Pole) and its angular distance from the subobserver point (center of disk) at observation time. Negative distance indicates the planets North pole is on the hidden hemisphere. Units: DEGREES and ARCSECONDS hEclLon hEclLat = Geometric heliocentric J2000 ecliptic longitude and latitude of target center at the instant light leaves it to be observed at print time (print time minus 1way lighttime). Units: DEGREES r rdot = Heliocentric range ("r", lighttime corrected) and rangerate ("rdot") of the target center at the instant light seen by the observer at printtime would have left the target center (printtime minus downleg lighttime). The Suntotarget distance traveled by a ray of light emanating from the center of the Sun that reaches the target center point at some instant and is recordable by the observer one downleg lighttime later at printtime. Units: AU and KM/S delta deldot = Range ("delta") and rangerate ("deltadot") of target center with respect to the observer at the instant light seen by the observer at printtime would have left the target center (printtime minus downleg lighttime); the distance traveled by a light ray emanating from the center of the target and recorded by the observer at printtime. "deldot" is a projection of the velocity vector along this ray, the lighttimecorrected lineofsight from the coordinate center, and indicates relative motion. A positive "deldot" means the target center is moving away from the observer (coordinate center). A negative "deldot" means the target center is moving toward the observer. Units: AU and KM/S 1way_LT = 1way downleg lighttime from target center to observer. The elapsed time since light (observed at printtime) would have left or reflected off a point at the center of the target. Units: MINUTES VmagSn VmagOb = Magnitude of target center velocity wrt Sun ("VmagSn") and the observer ("VmagOb") at the time light left the target center to be observed (print time minus 1way lighttime). These are absolute values of the velocity vectors (total speeds) and do not indicate direction of motion. Units: KM/S SOT /r = SunObserverTarget angle; targets apparent solar elongation seen from observer location at printtime. If negative, the target center is behind the Sun. Angular units: DEGREES. The "/r" column is a Sunrelative code, output for observing sites with defined rotation models only. /T indicates target trails Sun (evening sky) /L indicates target leads Sun (morning sky) NOTE: The SOT solar elongation angle is the total separation in any direction. It does not indicate the angle of Sun leading or trailing. STO = "STO" is the Sun>Target>Observer angle; the interior vertex angle at target center formed by a vector to the apparent center of the Sun at reflection time on the target and the apparent vector to the observer at printtime. Slightly different from true PHASE ANGLE (requestable separately) at the few arcsecond level in that it includes stellar aberration on the downleg from target to observer. Units: DEGREES TOM/Illu% = TargetObserverMoon/Illuminated percentage. The apparent lunar elongation angle between target body CENTER and the Moons CENTER, seen from the observing site, along with fraction of the lunar disk illuminated by the Sun. A negative lunar elongation angle indicates the target center is behind the Moon. Units: DEGREES & PERCENT. OPT = ObserverPrimaryTarget angle; apparent angle between a target satellite, its primary's center and an observer, at observing location, at print time. Units: DEGREES PsAng PsAMV = The position angles of the extended Sun>target radius vector ("PsAng") and the negative of the targets heliocentric velocity vector ("PsAMV"), as seen in the observers planeofsky, measured CCW (east) from reference frame North Celestial Pole. Computed for smallbodies only (and primarily intended for ACTIVE COMETS), "PsAng" is an indicator of the comets gastail orientation in the sky (being in the antisunward direction) while "PsAMV" is an indicator of dusttail orientation. Units: DEGREES. PlAng = Angle between observer and target orbital plane, measured from center of target at the moment light seen at observation time leaves the target. Positive values indicate observer is above the objects orbital plane, in the direction of reference frame +z axis. Smallbodies only. Units: DEGREES. Cnst = Constellation ID; the 3letter abbreviation for the name of the constellation containing the target centers astrometric position, as defined by IAU (1930) boundary delineation. See documentation for list of abbreviations. CTUT = Difference between uniform Coordinate Time scale and Earthrotation dependent Universal Time. Prior to 1962, the difference is with respect to UT1 (CTUT1). For 1962 and later, the delta is with respect to UTC (CTUTC). Values beyond the next July or January 1st may change if a leapsecond is introduced. Units: SECONDS ObsEcLon ObsEcLat = Observercentered Earth eclipticofdate longitude and latitude of the target centers apparent position, adjusted for lighttime, the gravitational deflection of light and stellar aberration. Although centered on the observer, the values are expressed relative to coordinate basis directions defined by the Earths true equatorplane, equinox direction, and mean ecliptic plane at print time. Units: DEGREES N.PoleRA N.PoleDC ICRF/J2000.0 Right Ascension and Declination (IAU2009 rotation model) of target bodies North Pole direction at the time light left the body to be observed at print time. Units: DEGREES GlxLon GlxLat = Observercentered Galactic System II (post WW II) longitude and latitude of the target centers apparent position. Adjusted for lighttime, gravitational deflection of light, and stellar aberration. Units: DEG DEG L_Ap_SOL_Time = Local Apparent SOLAR Time for observing site. This is the time indicated by a sundial. TOPOCENTRIC ONLY. Units: HH MM SS.ffff (sexagesimal angular hours) 399_ins_LT = Instantaneous lighttime of the station with respect to Earth center at printtime. The geometric (or "true") separation of site and Earth center, divided by the speed of light. Units: MINUTES RA_3sigma DEC_3sigma = Uncertainty in RightAscension and Declination. Output values are the formal +/ 3 standarddeviations (sigmas) around nominal position. Units: ARCSECONDS SMAA_3sig SMIA_3sig Theta Area_3sig = Planeofsky (POS) error ellipse data. These quantities summarize the targets 3dimensional 3standarddeviation formal uncertainty volume projected into a reference plane perpendicular to the observers lineofsight. SMAA_3sig = Angular width of the 3sigma error ellipse semimajor axis in POS. Units: ARCSECONDS. SMIA_3sig = Angular width of the 3sigma error ellipse semiminor axis in POS. Units: ARCSECONDS. Theta = Orientation angle of the error ellipse in POS; the clockwise angle from the direction of increasing RA to the semimajor axis of the error ellipse, in the direction of increasing DEC. Units: DEGREES. Area_3sig = Area of sky enclosed by the 3sigma error ellipse. Units: ARCSECONDS ^ 2. POS_3sigma = The RootSumofSquares (RSS) of the 3standard deviation planeofsky error ellipse major and minor axes. This single pointing uncertainty number gives an angular distance (a circular radius) from the targets nominal position in the sky that encompasses the errorellipse. Units: ARCSECONDS. RNG_3sigma RNGRT_3sig = Range and range rate (radial velocity) formal 3standarddeviation uncertainties. Units: KM, KM/S DOP_Ssig DOP_Xsig RT_delaysig = Doppler radar uncertainties at Sband (2380 MHz) and Xband (8560 MHz) frequencies, along with the roundtrip (total) delay to firstorder. Units: HERTZ and SECONDS Tru_Anom = Apparent true anomaly angle of the targets heliocentric orbit position; the angle in the targets instantaneous orbit plane from the orbital periapse direction to the target, measured positively in the direction of motion. The position of the target is taken to be at the moment light seen by the observer at printtime would have left the center of the object. That is, the heliocentric position of the target used to compute the true anomaly is one downleg lighttime prior to the printtime. Units: DEGREES L_ap_Hour_Ang = Local apparent HOUR ANGLE of target at observing site. The angle between the observers meridian plane, containing Earths axis ofdate and local zenith direction, and a great circle passing through Earths axisofdate and the targets direction, measured westward from the zenith meridian to target meridian along the equator. Negative values are angular times UNTIL transit. Positive values are angular times SINCE transit. Exactly 24_hrs/360_degrees. EARTH TOPOCENTRIC ONLY. Units: sHH MM SS.fff (sexagesimal angular hours) phi PABLON PABLAT = "phi" is the true PHASE ANGLE at the observers location at print time. "PABLON" and "PABLAT" are the J2000 ecliptic longitude and latitude of the phase angle bisector direction; the outward directed angle bisecting the arc created by the apparent vector from Sun to target center and the astrometric vector from observer to target center. For an otherwise uniform ellipsoid, the time when its longaxis is perpendicular to the PAB direction approximately corresponds to lightcurve maximum (or maximum brightness) of the body. PAB is discussed in Harris et al., Icarus 57, 251258 (1984). Units: DEGREES, DEGREES, DEGREES, DEGREES
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