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SsODNet & the Quareo web service use "Types" of objects which are all included in EPN-TAP list:

"Asteroid","Spacecraft","Comet","Exoplanet","Spacejunk","Satellite","Planet","Dwarf Planet","Star"

as well as “Classes“ which are sub-divisions of some types (and other classes, up to 3 levels):

• SsODNet uses "Classes"  of objets: ["MB", "Middle", "Inner", "Outer", "NEA", "Mars-Crosser", "Apollo", "Hungaria", "Trojan", "Amor", "Hilda", "Cybele", "KBO", "Resonant", "Aten", "Short-period", "Classical", "Main", "Centaur", "SDO", "Halley-type", "3:2", "Jupiter-family", "7:4", "9:5", "5:3", "Detached", "11:6", "2:1", "Long-period", "5:2", "4:3", "7:3", "19:9", "Atira", "3:1", "11:8", "5:4", "12:5", "9:4", "8:3", "11:3", "7:2","11:2", "11:3", "27:4"]

This is a composite and multi-level parameter, each object may have several values attached.

(other values are related to spacecraft and spacejunk, see here: http://vo.imcce.fr/webservices/ssodnet/?quaero#types_and_classes)

Satellites of asteroids are tagged as satellites with parent = primary, and have no "class"

No interstellar object included in 2020.


EPN-TAP services use target_class (compulsory), dynamical_class and dynamical_type (optionals)

• Target_class related to small bodies are:

asteroid, dwarf_planet, comet

• Recurring pb with dwarf_planet, not always identified as such in databases / services

Baptiste proposes to always set them to "dwarf planets#asteroid" in target_class — May solve all pb, check if this is consistent!

• 2 other parameters reserved: dynamical_class and dynamical_type (should be a subdivision, TBC). Should both provide a clear list of values, based on those of existing services.

What is ~ clear (names TBC):

dynamical_class: MBA, NEO, TNO, Trojan, Centaur, JFC (or Jupiter-family), Halley-type, Long-period…

dynamical_type: families, resonances… +  Plutino (=res 2:3)?, Hot classical, Cold classical, Scattered Disk object, Detached object…

Target_classdynamical_classdynamical_type
comet

JFC (or Jupiter-family)

Halley-type

Long-period

Interstellar?


asteroid






NEO


Athen

Apollo

Amor

Atira

MBA

families

(Hungaria, Phocaea, Hilda, Cybele…)

Mars-crosser?

Trojanassociate primary?
Centaur
TNO

resonances, or Resonant

Plutino (= res 2:3)?

Hot classical

Cold classical

Scattered Disk object

Detached object

dwarf_planet#asteroid

MBA

TNO



• TNOsarecool uses dynamical_type , including res 2:5, res 1:2, Plutino, Hot classical, Cold classical, SDO (Scattered disk object), Detached object, Inner Oort obj (not strictly KBO?)

• M4ast uses no dynamic classification

• MPC uses orbit_class !!! Those are free comment strings and are not always informed (can’t be used easily for searches…)

    Include 4 NEO types + Object with perihelion distance < 1.665 AU, Hungaria, MBA, Phocaea, Hilda, Jupiter Trojan, Distant Object, Unclassified

=> Is there a clear IAU nomenclature with 2 sub levels?

Basecom uses comettype with values: dynamically new, Halley-type comet, Jupiter-family comet, long-period comet


• DynAstVO

Uses dynamical_class: MBA, NEO and Null     + add Centaur?

Also uses dynamical_type including Athen Apollo Amor Atira, plus other things:

CENTAUR (class NULL) - should be in dynamical_class

PHOCAEA (class NULL) - an MBA family (dynamical_class should be MBA)

I, IIA, IIB ( class MBA)


LuckyStar table (web site in Brasil): 

Contains asteroids and satellites data.

Uses a composite DynClass parameter with values: Centaur, (Planet Satellite), TNO> Cold C., TNO> Detached O., TNO> Hot C., TNO> Plutino, TNO> Resonant, TNO> Scattered D.O., Trojan (~ in line with TNOsarecool)
For asteroid satellites, this refers to the primary.


SSODnet class:

target_class
(EPN-TAP)

dynamical_class
(DynAstVO)

dynamical_type
(TNOsarecool, DynAstVO)

DynClass
(LuckyStar)

Orbit_class
(MPC)

"MB"

   "Middle"

   "Inner" (either MB or Classical)

   "Outer" (either MB or Classical)

"NEA"

"Mars-Crosser"

   "Apollo"

"Hungaria"

"Trojan"

   "Amor"

   "Hilda"

   "Cybele"

"KBO"

   "Resonant"

   "Aten"

"Short-period"

   "Classical"

      "Main"

"Centaur"

   "SDO"

   "Halley-type"

      "3:2"

   "Jupiter-family"

      "7:4"

      "9:5"

      "5:3"

"Detached"

      "11:6"

      "2:1"

"Long-period"

      "5:2"

      "4:3"

      "7:3"

      "19:9"

   "Atira"

      "3:1"

      "11:8"

      "5:4"

      "12:5"

      "9:4"

      "8:3"

      "11:3"

      "7:2"

(type: Dwarf Planet, various classes)

Asteroid

Asteroid

Asteroid 

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Comet

Asteroid

Asteroid

Asteroid

Asteroid

Comet

Asteroid

Comet

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Comet

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Asteroid

Dwarf_planet

MBA

MBA

MBA or TNO

MBA or TNO

NEO

?

NEO

MBA

Trojan

NEO

MBA

MBA

TNO

TNO

NEO


TNO

TNO

Centaur

TNO


TNO

JFC

TNO

TNO

TNO

TNO

TNO

TNO


TNO

TNO

TNO

TNO

NEO

TNO

TNO

TNO

TNO

TNO

TNO

TNO

TNO

MBA or TNO



Inner?

External? 



APOLLO

Hungaria


AMOR

Hilda

Cybele



ATEN


Hot classical & Cold classical?

Hot classical & Cold classical?


SDO


Plutino





Detached object


res 1:2


res 2:5




ATIRA

















Trojan





TNO> Resonant



TNO> Cold C. & TNO> Hot C.?

TNO> Cold C. & TNO> Hot C.?

Centaur

TNO> Scattered D.O.


TNO> Plutino





TNO> Detached O.



Not identified in SSODnet


(a family; MB / Inner)


No distinction between hot and cold classical objects


Comet

Asteroid

Asteroid



MBA

MBA


Inner Oort obj 

Phocaea

I, IIA, IIB







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