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Satellite orbit and rotation #142

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Dec 31, 2023
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Satellite orbit and rotation #142

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2e76c7f
Satellite orbit and rotation, phase 1 (W.I.P)
AstroChara Dec 28, 2023
a29496f
Lempo system update + pedroJ fixes
AstroChara Dec 28, 2023
9f26d7d
Gonggong I, G!kun orientation
AstroChara Dec 29, 2023
816c4d2
Haumea system update
AstroChara Dec 29, 2023
bbe3936
Varda system update
AstroChara Dec 29, 2023
d203551
Actaea orbit update
AstroChara Dec 31, 2023
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128 changes: 81 additions & 47 deletions data/dwarfplanets.ssc
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Original file line number Diff line number Diff line change
Expand Up @@ -312,6 +312,9 @@ ReferencePoint "Pluto-Charon" "Sol"
# Masses from Ragozzine and Brown (2009), AJ 137, 4766
# "Orbits and Masses of the Satellites of the Dwarf Planet Haumea (2003 EL61)"
# https://ui.adsabs.harvard.edu/abs/2009AJ....137.4766R/abstract
# Secondaries' orbits from Gourgeot et al. (2016), A&A 593, A19
# "Near-infrared spatially resolved spectroscopy of (136108) Haumea's multiple system"
# https://ui.adsabs.harvard.edu/abs/2016A%26A...593A..19G
"Haumea:136108 Haumea:2003 EL61" "Sol"
{
Class "dwarfplanet"
Expand Down Expand Up @@ -357,56 +360,67 @@ ReferencePoint "Pluto-Charon" "Sol"
Mass 0.0000002997321
OrbitFrame
{
EclipticJ2000 { Center "Sol/Haumea" }
EquatorJ2000 { Center "Sol/Haumea" }
}
EllipticalOrbit
{
Epoch 2454615.0 # 2008 May 28 12:00
Period 18.2783
SemiMajorAxis 25657
Eccentricity 0.249
Inclination 113.013
AscendingNode 205.016
ArgOfPericenter 178.9
MeanAnomaly 178.5
Epoch 2452167.5299 # Tperi = 2001 Sep 15 00:43:03
Period 18.323535
SemiMajorAxis 25147.829
Eccentricity 0.15543
Inclination 88.83
AscendingNode 206.73
ArgOfPericenter 143.44
MeanAnomaly 0
}
UniformRotation
UniformRotation # assumed to match orbit plane
{
Period 10
Period 10 # unknown, very likely asynchronous
}
LunarLambert 0.5
GeomAlbedo 0.8
InfoURL "https://en.wikipedia.org/wiki/Namaka_(moon)"
}

# Size from Fernández-Valenzuela et al. (2021), EPSC2021-609
# "The stellar occultations by the largest satellite of the dwarf planet Haumea, Hi'iaka"
# https://ui.adsabs.harvard.edu/abs/2021EPSC...15..609F
# Shape and rotation from Hastings et al. (2016), AJ 152 (6), 195
# "The Short Rotation Period of Hi’iaka, Haumea’s Largest Satellite"
# https://ui.adsabs.harvard.edu/abs/2016AJ....152..195H
# Obliquity from Fernández-Valenzuela et al. (2022), EPSC2022-406
# "Hi'iaka's physical and dynamical properties using long-term photometric data"
# https://ui.adsabs.harvard.edu/abs/2022EPSC...16..406F
"Hi'iaka:Haumea I:136108 Haumea I:S 2005 (2003 EL61) 1" "Sol/Haumea"
{
Class "minormoon"
Mesh "roughsphere.cms"
Texture "icymoon.*"
Radius 160
Radius 175 # "...a larger effective diameter than what has been published so far."
SemiAxes [ 1 0.81 0.81 ] # Amag=0.23, b/a=0.81 if edge-on
Mass 0.000002997321
OrbitFrame
{
EclipticJ2000 { Center "Sol/Haumea" }
EquatorJ2000 { Center "Sol/Haumea" }
}
EllipticalOrbit
{
Epoch 2454615.0 # 2008 May 28 12:00
Period 49.462
SemiMajorAxis 49880
Eccentricity 0.0513
Inclination 126.356
AscendingNode 206.766
ArgOfPericenter 154.1
MeanAnomaly 152.8
Epoch 2452190.3944 # Tperi = 2001 Oct 07 21:27:56
Period 49.031527
SemiMajorAxis 49502.940
Eccentricity 0.05260
Inclination 79.48
AscendingNode 192.99
ArgOfPericenter 276.14
MeanAnomaly 0
}
UniformRotation
{
Period 9.8
Period 9.79736
Inclination 90 # relative to orbit plane
}
LunarLambert 0.5
GeomAlbedo 0.8
GeomAlbedo 0.66
InfoURL "https://en.wikipedia.org/wiki/Hi'iaka_(moon)"
}

Expand Down Expand Up @@ -466,7 +480,7 @@ ReferencePoint "Pluto-Charon" "Sol"
InfoURL "https://en.wikipedia.org/wiki/S/2015_(136472)_1"
}

# System mass from Holler et al. (2021), Icarus 355, 114130
# System mass and orbit from Holler et al. (2021), Icarus 355, 114130
# "The Eris/Dysnomia system I: The orbit of Dysnomia"
# https://ui.adsabs.harvard.edu/abs/2021Icar..35514130H/abstract
# Mass ratio from Brown and Butler (2023), Planet. Sci. J. 4, 193
Expand Down Expand Up @@ -531,9 +545,9 @@ ReferencePoint "Pluto-Charon" "Sol"
SemiMajorAxis 37273
Eccentricity 0.0062
Inclination 45.49
MeanLongitude 125.78
AscendingNode 126.17
ArgOfPericenter 180.83
MeanAnomaly 178.78
LongOfPericenter 307
}
BodyFrame { EquatorJ2000 {} }
UniformRotation
Expand Down Expand Up @@ -704,25 +718,34 @@ ReferencePoint "Orcus-Vanth" "Sol"
}
EllipticalOrbit
{
Epoch 2454000.0 # 2006 Sept 21 12:00
Period 9.3072
SemiMajorAxis 940
Eccentricity 0.021
Inclination 100.2
AscendingNode 87.2
ArgOfPericenter 305.6
MeanAnomaly 321.4
Epoch 2454000 # 2006 Sept 21 12:00
Period 9.539154
SemiMajorAxis 1241.4 # semi-major axis: 8999.8 km, mass ratio: 0.16 +/- 0.02
Eccentricity 0.00091
Inclination 105.03
MeanLongitude 8.52
AscendingNode 53.49
LongOfPericenter 148
}
BodyFrame
{
EquatorJ2000 { Center "Sol/Orcus-Vanth" }
}
UniformRotation # to match mutual orbit
{
Inclination 98.2
AscendingNode 83.3
Epoch 2454000 # 2006 Sept 21 12:00
Inclination 105.03
AscendingNode 53.49
MeridianAngle 135.03
}
LunarLambert 0.5
GeomAlbedo 0.231
InfoURL "https://en.wikipedia.org/wiki/90482_Orcus"
}

# Orbit from Grundy et al. (2019), Icarus 334, 62-78
# "Mutual orbit orientations of transneptunian binaries"
# http://www2.lowell.edu/users/grundy/abstracts/2019.TNB_orbits.html
"Vanth:Orcus I:90482 Orcus I:S 2005 (90482) 1" "Sol/Orcus"
{
Class "moon"
Expand All @@ -737,14 +760,25 @@ ReferencePoint "Orcus-Vanth" "Sol"
}
EllipticalOrbit
{
Epoch 2454000.0 # 2006 Sept 21 12:00
Period 9.3072
SemiMajorAxis 8175
Eccentricity 0.021
Inclination 100.2
AscendingNode 87.2
ArgOfPericenter 125.6
MeanAnomaly 321.4
Epoch 2454000 # 2006 Sept 21 12:00
Period 9.539154
SemiMajorAxis 7758.4 # semi-major axis: 8999.8 km, mass ratio: 0.16 +/- 0.02
Eccentricity 0.00091
Inclination 105.03
MeanLongitude 188.52
AscendingNode 53.49
LongOfPericenter 328
}
BodyFrame
{
EquatorJ2000 { Center "Sol/Orcus-Vanth" }
}
UniformRotation # to match mutual orbit
{
Epoch 2454000 # 2006 Sept 21 12:00
Inclination 105.03
AscendingNode 53.49
MeridianAngle 315.03
}
LunarLambert 0.5
GeomAlbedo 0.08
Expand All @@ -753,7 +787,7 @@ ReferencePoint "Orcus-Vanth" "Sol"

# Kiss et al. (2019), Icarus 334, 3
# "The mass and density of the dwarf planet (225088) 2007 OR10"
# https://arxiv.org/abs/1903.05439
# https://ui.adsabs.harvard.edu/abs/2019Icar..334....3K/abstract
# Color indices from Boehnhardt et al. (2014), EMP 114 (1-2), 35
# "Photometry of Transneptunian Objects for the Herschel Key Program 'TNOs are Cool'"
"Gonggong:225088 Gonggong:2007 OR10" "Sol"
Expand Down Expand Up @@ -810,9 +844,9 @@ ReferencePoint "Orcus-Vanth" "Sol"
SemiMajorAxis 24021
Eccentricity 0.2908
Inclination 83.08
MeanLongitude 205.57
AscendingNode 31.99
ArgOfPericenter 77.06
MeanAnomaly 96.52
LongOfPericenter 109.05
}
LunarLambert 0.5
GeomAlbedo 0.08
Expand Down
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