COMMUNITY ADDON: Exoplanets

17 Aug 2017 03:46

Here you can publish scripts for new exoplanets. This thread is only for real objects.

17 Aug 2017 03:50

GJ 625 / Gliese 625 / HIP 80459 / AC 54 1646-56 (confirmed)

// Filename: GJ_625_BC.sc
// JackDole 2017.08.19 16:49:04

// Put this in 'addons\catalogs\stars'

// http://simbad.u-strasbg.fr/simbad/sim-id?Ident=gl+625&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id

//------------------------------------------------------------------------------

RemoveStar "Gliese 625/AC+54 1646-56/HIP 80459"

StarBarycenter "GJ 625 system"
{
    RA      16 25 24.6232
    Dec     54 18 14.762
    Dist    6.490135
}

//------------------------------------------------------------------------------

(Put this in 'addons\catalogs\stars')

// Filename: GJ_625.sc
// JackDole 2017.08.17 11:39:49

// http://exoplanet.eu/catalog/gj_625_b/
// https://en.wikipedia.org/wiki/AC_54_1646-56

// Put this in 'addons\catalogs\planets'

//------------------------------------------------------------------------------

Star "GJ 625/Gliese 625/HIP 80459/AC 54 1646-56"
{
    ParentBody  "GJ 625 system"
    Class       "M2 V"
    
    RadSol      0.31
    MassSol     0.3
    
    AppMagn     10.17
    
    Teff        3499.0
    FeH         -0.38
}

Planet "GJ 625 b/Gliese 625 b/HIP 80459 b/AC 54 1646-56 b"
{
    ParentBody  "GJ 625"
    
    Mass    3.02162850
    Msini   3.02162850
    
    DiscDate    "2017"
    DiscMethod  "RadVel"
    Updated     "2017.05.19"
    
    Orbit
    {
        SemiMajorAxis   0.078399
        Period          0.040078
        Eccentricity    0.13
        ArgOfPericen    240.0
    }
}

//------------------------------------------------------------------------------

(Put this in 'addons\catalogs\planets')

17 Aug 2017 05:22

Tau Ceti g, h, e and f (confirmed)

// Filename: TauCetiBC.sc
// JackDole 2017.08.17 13:36:32

//------------------------------------------------------------------------------
// http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=tau%20Cet
//------------------------------------------------------------------------------

RemoveStar "TAU Cet/52 Cet/Gliese 71/HIP 8102/HD 10700"

StarBarycenter "Tau Ceti"
{
    RA      01 44 04.08338
    Dec     -15 56 14.9262
    Dist    3.650
}

//------------------------------------------------------------------------------

(Put this in 'addons\catalogs\stars')

// Filename:TauCeti.sc
// JackDole 2017.08.17 13:29:06

//------------------------------------------------------------------------------
// https://arxiv.org/pdf/1708.02051.pdf
//
// http://exoplanet.eu/catalog/tau_cet_g/
// http://exoplanet.eu/catalog/tau_cet_h/
// http://exoplanet.eu/catalog/tau_cet_f/
// http://exoplanet.eu/catalog/tau_cet_e/
//------------------------------------------------------------------------------

Star    "TAU Cet/52 Cet/Gliese 71/HIP 8102/HD 10700"
{
    ParentBody  "Tau Ceti"
    Class       "G8.5 V"
    
    MassSol     0.783
    RadSol      0.793
    
    AppMagn     3.49
    AbsMagn     5.69
    
    Lum         0.52
    Teff        5344.0
    FeH         -0.55
    
    RotationPeriod  816
    
    Age         5.8
}

Planet "Tau Ceti g"
{
    ParentBody  "Tau Cet"
    
    Mass        1.75
    Msini       1.75
    
    DiscMethod  "RadVel"
    DiscDate    "2017"
    Updated     "2017.08.15"
    
    Orbit 
    {
        SemiMajorAxis   0.133               // a
        Period          0.054758
        Eccentricity    0.06                // e
        ArgOfPericen    35.3409             // w
        MeanAnomaly     43.3623             // M0
    }
}

Planet "Tau Ceti h"
{
    ParentBody  "Tau Cet"
    
    Mass        1.83
    Msini       1.83
 
    DiscMethod  "RadVel"
    DiscDate    "2017"
    Updated     "2017.08.15"
    
    Orbit 
    {
        SemiMajorAxis   0.243
        Period          0.135280
        Eccentricity    0.23
        ArgOfPericen    7.4484513367
        MeanAnomaly     -72.7656399816
    }
}

Planet "Tau Ceti e/HD 10700 e"
{
    ParentBody  "Tau Cet"
    
    Mass        3.94
    Msini       3.94
 
    DiscMethod  "RadVel"
    DiscDate    "2012"
    Updated     "2017.08.15"
    
    Orbit 
    {
        SemiMajorAxis   0.538
        Period          0.443541
        Eccentricity    0.18
        ArgOfPericen    22.3453540101
        MeanAnomaly     355.806790776
    }
}

Planet "Tau Ceti f/HD 10700 f"
{
    ParentBody  "Tau Cet"
    
    Mass        3.94
    Msini       3.94
 
    DiscMethod  "RadVel"
    DiscDate    "2012"
    Updated     "2017.08.15"
    
    Orbit 
    {
        SemiMajorAxis   1.334
        Period          1.741666
        Eccentricity    0.16
        ArgOfPericen    119.7482
        MeanAnomaly     -38.9611
    }
}

//------------------------------------------------------------------------------

(Put this in 'addons\catalogs\planets')

► Show Spoiler

TauCeti.pak: (1.62 KiB) Downloaded 488 times

(Put in 'addons')

17 Aug 2017 07:55

thanks you for the new I love it.

where is the b and c ?

17 Aug 2017 09:47

Roswell wrote:
Source of the post where is the b and c

As far as I know, Tau Ceti b, c and d are no longer valid. They were apparently wrong.

17 Aug 2017 09:58

Well it's deleted temporary until "confirmation" ?

17 Aug 2017 10:30

No, they was a "false positives", i.e. wrong discoveries.

17 Aug 2017 12:23

How it's possible when you said "false positive" for the b, c and d planet ?

17 Aug 2017 12:44

Roswell wrote:
Source of the post How it's possible when you said "false positive" for the b, c and d planet ?

There were no planets. The measurements were false.

PuzzySlayer9000 · 17 Aug 2017 13:51

Roswell wrote:
How it's possible when you said "false positive" for the b, c and d planet ?

Because of the vast distances involved in detecting exoplanets, it's not uncommon for an exoplanet signature to really just be nothing.

17 Aug 2017 22:20

Je vois. I understand now.

19 Aug 2017 07:50

I updated the script for the 'StarBarycenter' of GJ 625.

// Filename: GJ_625_BC.sc
// JackDole 2017.08.19 16:49:04

// Put this in 'addons\catalogs\stars'

// http://simbad.u-strasbg.fr/simbad/sim-id?Ident=gl+625&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id

//------------------------------------------------------------------------------

RemoveStar "Gliese 625/AC+54 1646-56/HIP 80459"

StarBarycenter "GJ 625 system"
{
    RA      16 25 24.6232
    Dec     54 18 14.762
    Dist    6.490135
}

//------------------------------------------------------------------------------

JediTrekkie · 29 Aug 2017 23:12

known and/or possible rogue planets (Planemos)
Planemos are a bit... bland, in my opinon but I made this anyway (Might add hypothetical moons later, just to make it more interesting)
Planemos.sc goes in addons/catalogs/stars
RougePlanets.sc goes in addons/catalogs/planets

skywalker66 · 19 Sep 2017 19:14

POSSIBLE EXOMOONS AROUND 1SWASP J1407 B?

[color=#ffffff]Recently astronomers suspected existence of the exomoons around 1SWASP J1407 b, WASP-12 b, Kepler-1625 b and especially MOA-2011-BLG-262L (on https://en.wikipedia.org/wiki/exomoon). They were able to confirm 1SWASP J1407 b as a Super Jupiter with a largest ring system, Kepler-1625 b as a Super Jupiter with Neptune-sized exosatellite, and MOA-2011-BLG-262L as a red dwarf with a ringed exoplanet (but not a rogue planet). They are not so sure about WASP-12 b's unknown exosatellite. More detailed observations by Leiden Observatory and University of Rochester researchers were able to determine that J1407 b's ring system consist of 37 icy-rocky rings (~1.0 Earth Mass) and major 16 ring gaps out to distance of 0.58 A.U. (on https://iopscience.iop.org/article/10.1 ... /2/126/pdf). They believed that one large exomoon wiht less than 0.8 Earth Mass resides in a large ring gap at 0.4 A.U. and two smaller exomoons with at least 0.3 Earth Mass each one resides in two small ring gaps at 0.23 and 0.24 A.U. respectively. However, presence of more ring gaps less than 0.4 A.U. to primary planet's cloudtops may indicate possible 6-7 exomoons all with 0.3 Earth Mass each one, based on the model structure of Kepler-90 system. Clearing of the ring gaps in a circumplanetary disk by protosatellites around the large Jovian planet show that the planetary formation can be very rapid. Extinct isotopes of Technetium-97, -98 and -99 decaying into Molybdenum-97, Ruthenium-98 and Ruthenium-99 in our early Solar System with half-lives of 3.4 million years, 4.2 million years and 210,000 years respectively. Two distinct reservoirs of such Mo-97 and Ru-98 isotopes in the iron meteorites (iron groups I, II, III & IV) show that large planetesimals and SuperEarths accrete in only 200,000 to 7 million years before being destroyed by Jupiter (also accreting at the same time) in the Grand Tack Event, with decay products retained; whereas terrestrial planets like Venus, Earth and Mars formed from demolition debris belt for few tens of million years after the Grand Tack, with no decay products retained. Jupiter separates the molybdenum isotope sources in the inner zone of Solar Nebula from those in the outer zone (on http://www.sciencedirect.com/science/ar ... 1x16305003 and news.brown.edu/articles/2016/12/jupiter). We are so fortunate to witness such unique event of large exomoons forming (or already formed) around a Super Jupiter soon after the primary star's birth as the nebula dissipated. A large Jovian planet probably tipped by another planet (yet unseen) on its inward migration to the star and captured sufficent amount of at least 2.8-3.0 Earth Mass from that object and even asteroid belt in the early stages of planetary formation in J1407's history. Such material could quickly accrete into seven Mars-sized rocky ice exomoons and one Earth-sized Titan exomoon as Jupiter's Galilean Moons and Saturn's Moon Titan (both larger than Planet Mercury) can demonstrate.

I had worked on making and fine-tuning the orbital and physical parameters of such eight exomoons for one week- using the following: Earth Mass= 5.9736e24 Kg; Jupiter Mass= 1.8989e27 Kg (318 Earth Mass); and J1407 b Mass= 3.8004e28 Kg. Therefore, Moon + Planet= Total Mass in Kilograms and Orbital Distance + Planetary Radius= Total Height above Center of Mass in Meters. I use Kepler's 3rd Law Ultra Calculator online on http://www.1728.org/kepler3a.htm. Therefore,
*Selena bI, volcanic Super Io, 1.93306056e9 m, 3.80061877e28 kg= period 3.8808 days or 0.010625 years
*Terra bII, like early Earth, 5.89206056e9 m, 3.80058956e28 kg=period 20.651 days or 0.056539 years
*Terra bIII, like early Earth, 1.459006056e10 m, 3.8005225e28 kg= period 80.47 days or 0.22031 years
*Iceworld bIV, like volcanic Super Europa, 2.831406056e10 m, 3.80054742e28 kg= period 217.55 days or 0.5956 years
*Iceworld bV, like volcanic Super Europa, 3.3660064e10 m, 3.8005746e28 kg= period 281.98 days or 0.77201 years
*Oceania bVI, with still freezing sea, 3.5200064e10 m, 3.80058743e28 kg= period 301.55 days or 0.82559 years
*Titan bVII, like Super Titan, 4.83500064e10 m, 3.80062096e28 kg= period 485.45 days or 1.3291 years
*Titan bVIII, like Super Titan, 6.1200064e10 m, 3.80081448e28 kg= period 691.30 days or 1.8926 years[/color]

[color=#ffffff]Now comes one more interesting thing about J1407 b exomoons: extreme tidal heating through the orbital resonances. Jupiter's Galilean Moons has orbital resonances of 1:1 for Io, 2:1 for Europa, 4:1 for Ganymede and 9.4:1 for Callisto. Io's crust gets pulled apart and heated when three moons lined up with each other for 57% of 206 orbits in one Earth year. On the other hand, J1407 b's four innermost exomoons has orbital resonances of 1:1 for bI, 5:1 for bII, 20.7:1 for bIII and 56:1 for bIV. BI's crust gets pulled apart and heated when three moons lined up with each other for 68% of 94 orbits in one Earth year. Moreover, bI orbits very much like Europa in 3.8 days around the planet at Callisto's distance- apparently faster than Callisto's orbital period of 16.7 days. this is because J1407 b's gravity is more stronger than Jupiter and enables it to have more ring material. To see effects of the orbital resonances for either Jupiter or J1407 b, you may use SpaceEngine's lower toolsbars onscreen and set time pace to x3000 normal rate over the polar view of planet for faster satellite revolutions. The planet's ring system has major ring gaps as the following:[/color]
[color=#ffffff]*0.0126 A.U.   Gap A: Callisto Distance- "bI" Moon[/color]
[color=#ffffff]*0.0400 A.U.   Gap B: "bII" Moon[/color]
[color=#ffffff]*0.0650 A.U.   Gap C: TRAPPIST-1 h Distance[/color]
[color=#ffffff]*0.0700 A.U.   Gap D: Kepler-80 c Distance[/color]
[color=#ffffff]*0.1000 A.U.   Gap E: "bIII" Moon[/color]
[color=#ffffff]*0.12-0.13 A.U. Gap F: Kepler-32 d Distance[/color]
[color=#ffffff]*0.19-0.20 A.U. Gap G: "bIV" Moon[/color]
[color=#ffffff]*0.22-0.23 A.U. Gap H: Kepler-296 A f Distance- "bV" Moon[/color]
[color=#ffffff]*0.24-0.25 A.U. Gap I: HD 40307 f Distance- "bVI" Moon[/color]
[color=#ffffff]*0.2800 A.U.     Gap J: Gliese 667 C d Distance[/color]
[color=#ffffff]*0.30-0.31 A.U. Gap K:[/color]
[color=#ffffff]*0.33-0.34 A.U. Gap L: HR 8832 h Distance- "bVII" Moon[/color]
[color=#ffffff]*0.35-0.36 A.U. Gap M: Kepler-20 d Distance[/color]
[color=#ffffff]*0.38-0.43 A.U. Gap N: Mercury Distance- "bVIII" Moon[/color]
[color=#ffffff]*0.46-0.48 A.U. Gap O: Kepler-11 g Distance[/color]
[color=#ffffff]*0.50-0.51 A.U. Gap P: Kepler-90 f Distance[/color]

[color=#ffffff]J1407 b's exomoons would be placed at the random distances anywhere below Gap N. But not every gap has a exomoon. The other stellar systems with more than 5 exoplanets are placed here for comparison. Super Jupiters have a greater chance of Mars-sized and Earth-sized exomoons with massive helium-nitrogen atmospheres with greenhouse gases like H2O, SO2, NH4 and CH3 to be discovered by our future explorations. Terra exomoons have a good chance of becoming the "Gas Dwarfs" size of Neptune if they retain more H2 or He. J1407 b's eight exomoons are not officially confirmed yet, until the James Webb Space Telescope would be launched in 2018.[/color]
[color=#ffffff]1SWASP J1407 b.sc goes in addons/catalogs/planets

[/color]

[color=#ffffff]One screenshot sample of J1407 b Jovian planet with exomoons

[/color]

skywalker66 · 20 Sep 2017 18:34

This exoplanet has largest rings that extend to 0.5 A.U. and orbits around a star called J1407 400 light years from our Sun. For comparison, Saturn's rings extend to only 0.001 A.U. but there is a equatorial ridge on a distant moon Iapetus that once get dust and rock from much more massive ring system out to distance of 0.25 A.U., almost to half way like J1407 b ring system many billions of years ago. Saturn's smaller icy moons accrete at much later date than Iapetus and Titan. I do believe that Jupiter's Galilean moons and Saturn's moon Titan formed first, long before our Moon was made.

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