Accepted Identifiers and Catalogs

The Exoplanet Archive maintains its own list of cross-identifications for every star in the the Exoplanet Archive. To search on a single star, enter the star name in the search box. If the star name is recognized by the Exoplanet Archive, the user is taken directly to the Exoplanet Archive Overview page for that star.

If the user enters the name of star that has been identified by the Exoplanet Archive as being part of a multiple system, the user will be given the choice to select between either component of the system. For example, if a user enters 83 Leo, the Exoplanet Archive returns the list of stellar components (83 Leo A, 83 Leo B) and asks the user to chose the appropriate stellar component.


If a user enters a name that is not recognized by the Exoplanet Archive, it is possible that the user has used an alias which is unknown to the Exoplanet Archive but is known to SIMBAD. The user input is passed to SIMBAD and NED to search for additional aliases which may be recognized by the Exoplanet Archive.

If no SIMBAD or NED alias is found, the user is notified that the input is not recognized by the Exoplanet Archive, SIMBAD or NED.


If the input is recognized by SIMBAD, the user is given a list of SIMBAD aliases. The alias list is matched against the Exoplanet Archive alias list to search for an Exoplanet Archive entry. The full SIMBAD-Exoplanet Archive matching is displayed to allow the user to determine if the correct star has been identified. If multiple Exoplanet Archive sources are associated with a given SIMBAD alias, the multiple matches are also shown. The Exoplanet Archive object column provides a direct link to all matched entries in the Exoplanet Archive.

For example, HD 41004 is in the Exoplanet Archive, but the alias GSC 08092-00538 is not recognized by the Exoplanet Archive. Entering GSC 08092-00538 into the Exoplanet Archive triggers a query to SIMBAD for a list of additional aliases. The aliases are matched to aliases recognized by the Exoplanet Archive. In the case of HD 41004, there is an A and B component which is also indicated in the matched results. If the input is recognized by SIMBAD, a direct link to the SIMBAD entry is provided.


If the alias is recognized by SIMBAD but is classified as a non-Galactic object, a link to the NED entry is also provided. (example: M 31).


The following table lists the recommended identifiers to use when looking up information on a single object in the Exoplanet Archive.

Catalog How to pose your query to the Exoplanet Archive Examples
The Henry Draper Catalog HD NNNNNN [A] HD 105
hD 224873A
The Hipparcos Catalog HIP NNNNNN [A], or
HIP 71a
hic 268
The Gliese-Jahreiss Compilation GJ NNN [A], or
GJ NNN.N [A], or
GL NNN [A], or
GL 269B
GJ 914
GJ 263
The Bayer-Flamsteed ggg CON [A] tau Cet
Common Name Use the name itself Vega,
54 Peg
The Bright Star Catalog HR NNNN [A] HR 8234
The Durchmusterung Catalogs (BD,CD,CPD, SD).
Please see note below.
BDsNN NNNN [A], or
BD+19 5036
CD-49 14337
SD-20 00465
The 2MASS Catalog 2MASS JHHMMSSSSsDDMMSSS [A] 2MASS J22572795+2046077
The Washington Double Star Catalog WDS HHMMmsDDMM [A] WDS J07346+3153A
The Smithsonian Astrophysical Observatory Catalog SAO NNNNNN [A] SAO 012345
The Tycho Catalog TYC NNNN-NNNNN-N [A] TYC 1717-02193-1
Trans-Atlantic Exoplanet Survey TrES-NN TrES-03
Optical Gravitational Lensing Experiment (Transit Events) OGLE-TR-NNN OGLE-TR-111
Optical Gravitational Lensing Experiment (Bulge) OGLE YYYY-BLG-NNNL OGLE 2005-BLG-071L
Microlensing Observations in Astrophysics MOA YYYY-BLG-NNN MOA 2003-BLG-53
XO Survey XO-NN XO-01
Convection, Rotation, and Planetary Transits - Exoplanet COROT-EXO-NN COROT-EXO-01
Hungarian Automated Telescope - Planet HAT-P-NN HAT-P-3
Sagittarius Window Eclipsing Extrasolar Planet Search SWEEPS-NN SWEEPS-11
Wide Angle Search for Planets WASP-NN WASP-2
Pulsar PSR BHHMMsDD PSR B1620-26
Super COSMOS Research Consortium on Nearby Stars SCR JHHMMsDDMM SCR J1845-6357
Chamaeleon H-Alpha CHAHA NN ChaHa 8

In the instructions above

  • N = an integer digit (0-9).
  • HH = an integer number of hours (00-23).
  • MM = an integer number of minutes (00-59).
  • m = fraction of a minute (0-9), e.g., MMm = 217 corresponds to 21.7 minutes.
  • SSSS or SSS = seconds plus fraction of second (0000-5999 or 000-599), e.g., SSSS = 2248 corresponds to 22.48 seconds.
  • DD = integer number of degrees (00-89).
  • YYYY = integer number of years (2000-2099).
  • A = a letter of the (English) alphabet (A-Z or a-z).
  • ggg = The full Greek letter (e.g., alpha, beta) or the 3 English letter abbreviation of Greek letters (e.g., alf, bet). For the Greek letters mu and nu, please repeat the last character (muu, nuu) to enforce a three character abbreviation.
  • s = "+" or "-" sign.
  • CON = Three letter abbreviation of constellation name (e.g., TAU, AND).

All other letters are entered as is. Note also that

  • Italicized = an instruction
  • Anything written in [square brackets] may or may not be part of a query.
  • Leading zeros (0s) may be omitted
  • The Exoplanet Archive is not case-sensitive


Regarding Durchmusterung catalogs: The Exoplanet Archive uses the same designations as published in the original Durchmusterung catalogs. That is, the identifiers BD, CD, CPD, SD are not interchangeable. In the same spirit, the Exoplanet Archive also does not recognize the generic Durchmusterung (DM) identifier