List of orbitals parameters in use and denomination in different services. These are included in the final REC document.

parameterDescriptionUCDexoplanetDynastVOmpcTNOplanetsEPN-TAP v2 (Rec)unit
asemi-major axis
semi_major_axissemi_major_axissemi_major_axissemi_major_axissemi_major_axissemi_major_axisau

distance to primary body, used in service planets, should be identical





distance_to_primary km
eeccentricity
eccentricityeccentricityeccentricityeccentricity
eccentricity_
Iinclination to the ecliptic (J2000)
inclinationinclinationinclinationinclination
inclinationdeg
Ωlongitude of the ascending node (J2000.0)

long_asclong_asc

long_ascdeg
ωargument of perihelion (J2000.0)
periastronarg_perihelarg_perihel

arg_perihel

(name is unfortunate, should have been arg_periast)

deg
M0mean anomaly at the epoch

mean_anomalymean_anomaly

mean_anomalydeg
epoch


epoch (in JD) epoch (in yr.xx)

epochJD
νtrue anomaly





x
rotation periodsidereal rotation period




sidereal_rotation_periodsidereal_rotation_periodh
periodperiod
period



xd
tzero_trtime at the center of transit
tzero_tr





time at periastrontime of periastron passage






JD
time at conjunctiontime of the star-planet upper conjunction
t_conj




JD

time at center of second transit
tzero_tr_sec





λ anglesky-projected angle between the planetary orbital spin and the stellar rotational spin
lambda_angle




deg
dynamical typeand other classification parameters



dynamical_type
dynamical_typeLists here (2 levels):
Small bodies sub-types










massmass




mass (kg)masskg, mass Earth, mass Jupiter
polar_radius





polar_radius
polar_radius_uncertainty

polar_radius

km
equatorial radius





equatorial_radius
equatorial_radius_uncertainty
equatorial_radiuskm
mean radius





mean_radius
mean_radius_uncertainty
mean_radiuskm
diameterdiameter (or equivalent diameter for binaries)



diameter
diameterkm
rms_deviation(radius std-dev in Planets)






km
elevation(departure from ellipsoid)




elevation_min
elevation_max

km
albedo




albedo
albedo
magnitudeFor DynastVO
mag
- to be changed?


magnitude
magnitude










Proposed extension (complements after Rec), mostly for rotation

Main use case is natural_satellites, see also NEOCC and NEOROCKS

As the purpose of this page is homogenisation of these parameter, the content is subject to changes

parameterDescriptionUCD

natural_satellites

(proposed by team)

MP3C

unitEPN-TAP name, to be agreed
primaryBody orbited by target




primary, or primary_body
Needed for satellites, but also asteroid satellites and trojans (and exoplanets?) 

semi-major axis

semi_major_axis, but requires AU
=> distance_to_primary in km 



use distance_to_primary in km when not around a star?

3-axis radiia, b, c with a (polar)<b<cphys.size.radius

triaxial_a_radius
triaxial_b_radius
triaxial_c_radius

Beware that this is not always subplanetary/ along orbit


km

polar_radius
equatorial_radius
triaxial_b_radius (??) - ugly

(alt)a, b, c with a>b>c — solution from PDSA 


km

semi_major_radius
semi_minor_radius
polar_radius

This implies semi_major_radius = Subplanetary

(alt)a, b, c with a>b>c — solution from geofits


m

A_RADIUS
B_RADIUS
C_RADIUS

North pole RA

RA_spin
(if used in name, "spin" should be a prefix)

degNP_RA would look better

North pole Dec

Dec_spin
degNP_Dec would look better
Dec_spin_sec

Secular variation / Julian century


RA_spin_sec
deg/cyNP_RA_sec ? 
RA_spin _sec

Secular variation / Julian century


Dec_spin _sec
deg/cyNP_Dec_sec ?
W0_spinlongitude of origin meridian


deg
dW_spin/dtSpin rate per day
dW_spin/dt
 won't do as a variable name!

deg/d

dW_dt ? or simply spin_rate or rotation_rate?

obliquityangle between rotational axis and orbital axis = tilt of equator wrt orbital plane


deg

exist at least in ARTECS servvice

GM 

Gravitational parameter (more accurately known than mass in general) 

phys.gravityGm
m**3s**-2Gm
slopeslope of the phase curve (from HG model I guess)undefined

slope_parameter

noneslope_parameter or HG_slope_parameter?
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1 Comment

  1. Added table for rotation parameters, to be completed and reviewed