• 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_class | dynamical_class | dynamical_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? | |
Trojan | associate 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 | dynamical_class | dynamical_type | DynClass | Orbit_class |
"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 |