| Standard name | Cond. | Extended explanation | |
| Unknown | ? | Object of unknown nature | |
| · Transient | ev | transient event | |
| Radio | Rad | Radio-source | |
| · Radio(m) | mR | metric Radio-source | |
| · Radio(cm) | cm | centimetric Radio-source | |
| · Radio(mm) | mm | millimetric Radio-source | |
| · Radio(sub-mm) | smm | sub-millimetric source | |
| · HI | HI | HI (21cm) source | |
| · radioBurst | rB | radio Burst | |
| · Maser | Mas | Maser | |
| IR | IR | Infra-Red source | |
| · FIR | FIR | Far-Infrared source | |
| · MIR | MIR | Mid-Infrared source | |
| · NIR | NIR | Near-Infrared source | |
| Blue | blu | Blue object | |
| UV | UV | UV-emission source | |
| X | X | X-ray source | |
| · ULX? | UX? | Ultra-luminous X-ray candidate | |
| · ULX | ULX | Ultra-luminous X-ray source | |
| gamma | gam | gamma-ray source | |
| · gammaBurst | gB | gamma-ray Burst | |
| Inexistent | err | Not an object (error, artefact, ...) | |
| Gravitation | grv | Gravitational Source | |
| · LensingEv | Lev | (Micro)Lensing Event | |
| · Candidate_LensSystem | LS? | Possible gravitational lens System | |
| · Candidate_Lens | Le? | Possible gravitational lens | |
| · Possible_lensImage | LI? | Possible gravitationally lensed image | |
| · GravLens | gLe | Gravitational Lens | |
| · GravLensSystem | gLS | Gravitational Lens System (lens+images) | |
| · GravWaveEvent | GWE | Gravitational Wave Event | |
| Candidates | ..? | Candidate objects | |
| · Possible_G | G? | Possible Galaxy | |
| · Possible_SClG | SC? | Possible Supercluster of Galaxies | |
| · Possible_ClG | C?G | Possible Cluster of Galaxies | |
| · Possible_GrG | Gr? | Possible Group of Galaxies | |
| · Possible_As* | As? | ||
| · Candidate_** | **? | Physical Binary Candidate | |
| · · Candidate_EB* | EB? | Eclipsing Binary Candidate | |
| · · Candidate_Symb* | Sy? | Symbiotic Star Candidate | |
| · · Candidate_CV* | CV? | Cataclysmic Binary Candidate | |
| · · · Candidate_Nova | No? | Nova Candidate | |
| · · Candidate_XB* | XB? | X-ray binary Candidate | |
| · · · Candidate_LMXB | LX? | Low-Mass X-ray binary Candidate | |
| · · · Candidate_HMXB | HX? | High-Mass X-ray binary Candidate | |
| · Candidate_Pec* | Pec? | Possible Peculiar Star | |
| · · Candidate_YSO | Y*? | Young Stellar Object Candidate | |
| · · · Candidate_TTau* | TT? | T Tau star Candidate | |
| · · Candidate_C* | C*? | Possible Carbon Star | |
| · · Candidate_S* | S*? | Possible S Star | |
| · · Candidate_OH | OH? | Possible Star with envelope of OH/IR type | |
| · · Candidate_WR* | WR? | Possible Wolf-Rayet Star | |
| · · Candidate_Be* | Be? | Possible Be Star | |
| · · Candidate_Ae* | Ae? | Possible Herbig Ae/Be Star | |
| · · Candidate_HB* | HB? | Possible Horizontal Branch Star | |
| · · · Candidate_RRLyr | RR? | Possible Star of RR Lyr type | |
| · · · Candidate_Cepheid | Ce? | Possible Cepheid | |
| · · · Candidate_PulsV*WVir | WV? | Possible Variable Star of W Vir type | |
| · · Candidate_RGB* | RB? | Possible Red Giant Branch star | |
| · · Candidate_SG* | sg? | Possible Supergiant star | |
| · · · Candidate_RSG* | s?r | Possible Red supergiant star | |
| · · · Candidate_YSG* | s?y | Possible Yellow supergiant star | |
| · · · Candidate_BSG* | s?b | Possible Blue supergiant star | |
| · · Candidate_AGB* | AB? | Asymptotic Giant Branch Star candidate | |
| · · · Candidate_LP* | LP? | Long Period Variable candidate | |
| · · · Candidate_Mi* | Mi? | Mira candidate | |
| · · Candidate_post-AGB* | pA? | Post-AGB Star Candidate | |
| · · Candidate_BSS | BS? | Candidate blue Straggler Star | |
| · · Candidate_Hsd | HS? | Hot subdwarf candidate | |
| · · Candidate_WD* | WD? | White Dwarf Candidate | |
| · · Candidate_NS | N*? | Neutron Star Candidate | |
| · · Candidate_BH | BH? | Black Hole Candidate | |
| · · Candidate_SN* | SN? | SuperNova Candidate | |
| · · Candidate_low-mass* | LM? | Low-mass star candidate | |
| · · Candidate_brownD* | BD? | Brown Dwarf Candidate | |
| multiple_object | mul | Composite object | |
| · Region | reg | Region defined in the sky | |
| · · Void | vid | Underdense region of the Universe | |
| · SuperClG | SCG | Supercluster of Galaxies | |
| · ClG | ClG | Cluster of Galaxies | |
| · GroupG | GrG | Group of Galaxies | |
| · · Compact_Gr_G | CGG | Compact Group of Galaxies | |
| · PairG | PaG | Pair of Galaxies | |
| · · IG | IG | Interacting Galaxies | |
| · Cl*? | C?* | Possible (open) star cluster | |
| · GlCl? | Gl? | Possible Globular Cluster | |
| · Cl* | Cl* | Cluster of Stars | |
| · · GlCl | GlC | Globular Cluster | |
| · · OpCl | OpC | Open (galactic) Cluster | |
| · Assoc* | As* | Association of Stars | |
| · · Stream* | St* | Stellar Stream | |
| · · MouvGroup | MGr | Moving Group | |
| · ** | ** | Double or multiple star | |
| · · EB* | EB* | Eclipsing binary | |
| · · SB* | SB* | Spectroscopic binary | |
| · · EllipVar | El* | Ellipsoidal variable Star | |
| · · Symbiotic* | Sy* | Symbiotic Star | |
| · · CataclyV* | CV* | Cataclysmic Variable Star | |
| · · · Nova | No* | Nova | |
| · · XB | XB* | X-ray Binary | |
| · · · LMXB | LXB | Low Mass X-ray Binary | |
| · · · HMXB | HXB | High Mass X-ray Binary | |
| ISM | ISM | Interstellar matter | |
| · PartofCloud | PoC | Part of Cloud | |
| · PN? | PN? | Possible Planetary Nebula | |
| · ComGlob | CGb | Cometary Globule | |
| · Bubble | bub | Bubble | |
| · EmObj | EmO | Emission Object | |
| · Cloud | Cld | Cloud | |
| · · GalNeb | GNe | Galactic Nebula | |
| · · DkNeb | DNe | Dark Cloud (nebula) | |
| · · RfNeb | RNe | Reflection Nebula | |
| · · MolCld | MoC | Molecular Cloud | |
| · · · Globule | glb | Globule (low-mass dark cloud) | |
| · · · denseCore | cor | Dense core | |
| · · · SFregion | SFR | Star forming region | |
| · · HVCld | HVC | High-velocity Cloud | |
| · HII | HII | HII (ionized) region | |
| · PN | PN | Planetary Nebula | |
| · HIshell | sh | HI shell | |
| · SNR? | SR? | SuperNova Remnant Candidate | |
| · SNR | SNR | SuperNova Remnant | |
| · · outflow? | of? | Outflow candidate | |
| · · Outflow | out | Outflow | |
| · · HH | HH | Herbig-Haro Object | |
| Star | * | Star | |
| · V*? | V*? | Star suspected of Variability | |
| · Pec* | Pe* | Peculiar Star | |
| · · HB* | HB* | Horizontal Branch Star | |
| · · YSO | Y*O | Young Stellar Object | |
| · · · Ae* | Ae* | Herbig Ae/Be star | |
| · · Em* | Em* | Emission-line Star | |
| · · · Be* | Be* | Be Star | |
| · · BlueStraggler | BS* | Blue Straggler Star | |
| · · RGB* | RG* | Red Giant Branch star | |
| · · AGB* | AB* | Asymptotic Giant Branch Star (He-burning) | |
| · · · C* | C* | Carbon Star | |
| · · · S* | S* | S Star | |
| · · SG* | sg* | Evolved supergiant star | |
| · · · RedSG* | s*r | Red supergiant star | |
| · · · YellowSG* | s*y | Yellow supergiant star | |
| · · · BlueSG* | s*b | Blue supergiant star | |
| · · HotSubdwarf | HS* | Hot subdwarf | |
| · · post-AGB* | pA* | Post-AGB Star (proto-PN) | |
| · · WD* | WD* | White Dwarf | |
| · · low-mass* | LM* | Low-mass star (M<1solMass) | |
| · · brownD* | BD* | Brown Dwarf (M<0.08solMass) | |
| · · Neutron* | N* | Confirmed Neutron Star | |
| · · OH/IR | OH* | OH/IR star | |
| · · · TTau* | TT* | T Tau-type Star | |
| · · WR* | WR* | Wolf-Rayet Star | |
| · PM* | PM* | High proper-motion Star | |
| · HV* | HV* | High-velocity Star | |
| · V* | V* | Variable Star | |
| · · Irregular_V* | Ir* | Variable Star of irregular type | |
| · · · Orion_V* | Or* | Variable Star of Orion Type | |
| · · Eruptive* | Er* | Eruptive variable Star | |
| · · · Erupt*RCrB | RC* | Variable Star of R CrB type | |
| · · · RCrB_Candidate | RC? | Variable Star of R CrB type candiate | |
| · · RotV* | Ro* | Rotationally variable Star | |
| · · · RotV*alf2CVn | a2* | Variable Star of alpha2 CVn type | |
| · · · Pulsar | Psr | Pulsar | |
| · · · BYDra | BY* | Variable of BY Dra type | |
| · · · RSCVn | RS* | Variable of RS CVn type | |
| · · PulsV* | Pu* | Pulsating variable Star | |
| · · · RRLyr | RR* | Variable Star of RR Lyr type | |
| · · · Cepheid | Ce* | Cepheid variable Star | |
| · · · PulsV*delSct | dS* | Variable Star of delta Sct type | |
| · · · PulsV*RVTau | RV* | Variable Star of RV Tau type | |
| · · · PulsV*WVir | WV* | Variable Star of W Vir type | |
| · · · PulsV*bCep | bC* | Variable Star of beta Cep type | |
| · · · deltaCep | cC* | Classical Cepheid (delta Cep type) | |
| · · · gammaDor | gD* | Variable Star of gamma Dor type | |
| · · · pulsV*SX | SX* | Variable Star of SX Phe type (subdwarf) | |
| · · LPV* | LP* | Long-period variable star | |
| · · · Mira | Mi* | Variable Star of Mira Cet type | |
| · · SN | SN* | SuperNova | |
| · Sub-stellar | su* | Sub-stellar object | |
| · · Planet? | Pl? | Extra-solar Planet Candidate | |
| · · Planet | Pl | Extra-solar Confirmed Planet | |
| Galaxy | G | Galaxy | |
| · PartofG | PoG | Part of a Galaxy | |
| · GinCl | GiC | Galaxy in Cluster of Galaxies | |
| · · BClG | BiC | Brightest galaxy in a Cluster (BCG) | |
| · GinGroup | GiG | Galaxy in Group of Galaxies | |
| · GinPair | GiP | Galaxy in Pair of Galaxies | |
| · RadioG | rG | Radio Galaxy | |
| · HII_G | H2G | HII Galaxy | |
| · LSB_G | LSB | Low Surface Brightness Galaxy | |
| · AGN_Candidate | AG? | Possible Active Galaxy Nucleus | |
| · · QSO_Candidate | Q? | Possible Quasar | |
| · · Blazar_Candidate | Bz? | Possible Blazar | |
| · · BLLac_Candidate | BL? | Possible BL Lac | |
| · EmG | EmG | Emission-line galaxy | |
| · StarburstG | SBG | Starburst Galaxy | |
| · BlueCompG | bCG | Blue compact Galaxy | |
| · LensedImage | LeI | Gravitationally Lensed Image | |
| · · LensedG | LeG | Gravitationally Lensed Image of a Galaxy | |
| · · LensedQ | LeQ | Gravitationally Lensed Image of a Quasar | |
| · AGN | AGN | Active Galaxy Nucleus | |
| · · LINER | LIN | LINER-type Active Galaxy Nucleus | |
| · · Seyfert | SyG | Seyfert Galaxy | |
| · · · Seyfert_1 | Sy1 | Seyfert 1 Galaxy | |
| · · · Seyfert_2 | Sy2 | Seyfert 2 Galaxy | |
| · · Blazar | Bla | Blazar | |
| · · · BLLac | BLL | BL Lac - type object | |
| · · · OVV | OVV | Optically Violently Variable object | |
| · · QSO | QSO | Quasar |