This table has been retired and is no longer being updated. Please use the new K2 Planets and Candidates for the most current data and their data column definitions. This document maps the columns from the old table to the new table. More details about the retired and new tables are on the Developing a More Integrated NASA Exoplanet Archive page.
Data Columns in the K2 Candidate Table
The following table lists all of the data columns in the K2 Candidate table (k2candidates) that can be accessed using the K2 Candidate Interactive Table .
There are similar documents for the K2 Targets search and for the K2 Names table.
Some data include more specific information:
- Uncertainties (positive and negative)
- Limits
Positional Information comes from the EPIC Catalog. Photometry and color data comes from the EPIC, 2MASS, and WISE catalogs.
† Default column: these columns display in the interactive table when the table is first loaded, and when Reset Filters is clicked.
Digital Object Identifier
If you use archive data or services for your research, please include the following Digital Object Identifier (DOI) as part of your acknowledgment:
DOI 10.26133/NEA3
See Acknowledging the Archive for dataset-specific language. See the full list of NASA Exoplanet Archive DOIs for other data sets and services.
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Identification Columns
| Database Column Name |
Column Label | Description | Uncertainties Column (positive +) (negative -) |
Displayed String Name | Limit Column |
|---|---|---|---|---|---|
| epic_name† | EPIC Name | Name of the star as given by the EPIC Catalog. | |||
| tm_name | 2MASS Designation | Name of the star as given by the 2MASS Catalog. | |||
| epic_candname† | Candidate Name | Name used to identify planetary candidates, with the format EPIC NNNNNNNNN.DD, where the integer parts designates the target star and the decimal parts identifies a transiting object associated to the star. | |||
| pl_name† | Planet Name | Exoplanet Archive default name for confirmed planets. | |||
| k2c_refdisp† | Reference Disposition | Disposition provided by the associated reference. Typical values are CANDIDATE, FALSE POSITIVE, and CONFIRMED | |||
| k2c_reflink† | Reference Link | Direct link to reference for candidate parameters. | |||
| k2c_disp† | Exoplanet Archive Disposition | Disposition updated by the Exoplanet Archive. Current values are CANDIDATE, FALSE POSITIVE, and CONFIRMED. All candidates marked as CONFIRMED are also listed in the Exoplanet Archive Confirmed Planet table. | |||
| k2c_note† | Notes | Notes associated to the set of candidate parameters. | |||
k2_campaign† or k2_campaign_str† |
K2 Campaign number |
The K2 Campaign number for this target. Note: When constructing API queries, use |
|||
| k2c_recentflag† | Most Recent Flag | Flag indicating the most recent set of parameters for this candidate (1=most recent, 0=not most recent). | |||
| ra_str | RA [sexagesimal] | Right Ascension of the planetary system in sexagesimal format. | |||
| dec_str | Dec [sexagesimal] | Declination of the planetary system in sexagesimal notation. | |||
| ra | RA [decimal degrees] | Right Ascension of the planetary system in decimal degrees. | |||
| dec | Dec [decimal degrees] | Declination of the planetary system in decimal degrees. |
Planet Columns
| Database Column Name |
Table Label | Description | Uncertainties Column (positive +) (negative -) |
Displayed String Name | Limit Column |
|---|---|---|---|---|---|
| pl_orbper† | Orbital Period [days] | Time the candidate takes to make a complete orbit around the host star or system. | (+) pl_orbpererr1 (-) pl_orbpererr2 |
pl_orbperstr | pl_orbperlim |
| pl_tranmid† | Transit Midpoint [days] | The time given by the average of the time the candidate begins to cross the stellar limb and the time the candidate finishes crossing the stellar limb. | (+) pl_tranmiderr1 (-) pl_tranmiderr2 |
pl_tranmidstr | pl_tranmidlim |
| pl_trandep | Transit Depth [percent] | The size of the relative flux decrement caused by the orbiting body transiting in front of the star. | (+) pl_trandeperr1 (-) pl_trandeperr2 |
pl_trandepstr | pl_trandeplim |
| pl_trandur | Transit Duration [days] | The length of time from the moment the candidate begins to cross the stellar limb to the moment the candidate finishes crossing the stellar limb. | (+) pl_trandurerr1 (-) pl_trandurerr2 |
pl_trandurstr | pl_trandurlim |
| pl_imppar | Impact Parameter | The sky-projected distance between the center of the stellar disc and the center of the candidate disc at conjunction, normalized by the stellar radius. | (+) pl_impparerr1 (-) pl_impparerr2 |
pl_impparstr | pl_impparlim |
| pl_orbincl | Inclination [deg] | Angular distance of the orbital plane from the line of sight. | (+) pl_orbinclerr1 (-) pl_orbinclerr2 |
pl_orbinclstr | pl_orbincllim |
| pl_ratdor† | Ratio of Distance to Stellar Radius | The distance between the candidate and the star at mid-transit divided by the stellar radius. For the case of zero orbital eccentricity, the distance at mid-transit is the semi-major axis of the planetary orbit. | (+) pl_ratdorperr1 (-) pl_ratdorerr2 |
pl_ratdorstr | pl_ratdorlim |
| pl_ratror† | Ratio of Candidate to Stellar Radius | The candidate radius divided by the stellar radius | (+) pl_ratrorerr1 (-) pl_ratrorerr2 |
pl_ratrorstr> | pl_ratrorlim |
| pl_rade† | Candidate Radius [Earth radii] | Length of a line segment from the center of the candidate to its surface, measured in units of radius of the Earth. | (+) pl_radeerr1 (-) pl_radeerr2 |
pl_radestr | pl_radelim |
| pl_radj | Candidate Radius [Jupiter radii] |
Length of a line segment from the center of the candidate
to its surface, measured in units of radius of Jupiter. |
(+) pl_radjerr1 (-) pl_radjerr2 |
pl_radjstr | pl_radjlim |
| pl_eqt | Equilibrium Temperature [K] | The equilibrium temperature of the candidate as modeled by a black body heated only by its host star, or for directly imaged candidates, the effective temperature of the candidate required to match the measured luminosity if the candidate were a black body. | (+) pl_eqterr1 (-) pl_eqterr2 |
pl_eqtstr | pl_eqtlim |
| pl_fppprob | False Positive Probability | Probability of candidate to be any of the considered astrophysical false positive scenarios, determined by vespa calculation. | pl_fppprobstr | pl_fppproblim |
Stellar Columns
| Database Column Name |
Table Label | Description | Uncertainties Column (positive +) (negative -) |
Displayed String Name | Limit Column |
|---|---|---|---|---|---|
st_plx |
Parallax [mas] | Difference in the angular position of a star as measured at two opposite positions within the Earth's orbit. | (+) st_plxerr1 (-) st_plxerr2 |
st_plxstr | st_plxlim |
| st_dist | Distance [pc] | Distance to the planetary system in units of parsecs. | (+) st_disterr1 (-) st_disterr2 |
st_diststr | st_distlim |
| st_teff | Effective Temperature [K] |
Temperature of the star as modeled by a
black body emitting the same total amount
of electromagnetic radiation. |
(+) st_tefferr1 (-) st_tefferr2 |
st_teffstr | st_tefflim |
| st_logg | Stellar Surface Gravity | Gravitational acceleration experienced at the stellar surface. | (+) st_loggerr1 (-) st_loggerr2 |
st_loggstr | st_logglim |
| st_metfe | Stellar Metallicity [dex] | Measurement of the metal content of the photosphere of the star as compared to the hydrogen content. | (+) st_metfeerr1 (-) st_metfeerr2 |
st_metfestr | st_metfelim |
| st_metratio | Metallicity Ratio | Ratio for the Metallicity Value ([Fe/H] denotes iron abundance, [M/H] refers to a general metal content) | |||
| st_rad† | Stellar Radius [Solar radii] |
Length of a line segment from the center of the star
to its surface, measured in units of radius of the Sun. |
(+) st_raderr1 (-) st_raderr2 |
st_radstr | st_radlim |
| st_vsini | Rotational Velocity v*sin(i) [km/s] | Rotational velocity at the equator of the star multiplied by the sine of the inclination. | (+) st_vsinierr1 (-) st_vsinierr2 |
st_vsinistr | st_vsinilim |
Photometry Columns
| Database Column Name |
Table Label | Description | Uncertainties Column (positive +) (negative -) |
Displayed String Name | Limit Column |
|---|---|---|---|---|---|
| st_kep† | Kepler-band [mag] | Brightness of the host star as measured using the Kepler-band in units of magnitudes. | st_keperr | st_kepstr | st_keplim |
| st_bj | B-band (Johnson) [mag] | Brightness of the host star as measured using the B (Johnson) band in units of magnitudes. | st_bjerr | st_bjstr | st_bjlim |
| st_vj | V-band (Johnson) [mag] | Brightness of the host star as measured using the V (Johnson) band in units of magnitudes. | st_vjerr | st_vjstr | st_vjlim |
| st_us | u-band (Sloan) [mag] | Brightness of the host star as measured using the u (Sloan) band in units of magnitudes. | st_userr | st_usstr | st_uslim |
| st_gs | g-band (Sloan) [mag] | Brightness of the host star as measured using the g (Sloan) band in units of magnitudes. | st_gserr | st_gsstr | st_gslim |
| st_rs | r-band (Sloan) [mag] | Brightness of the host star as measured using the r (Sloan) band in units of magnitudes. | st_rserr | st_rsstr | st_rslim |
| st_is | i-band (Sloan) [mag] | Brightness of the host star as measured using the i (Sloan) band in units of magnitudes. | st_iserr | st_isstr | st_islim |
| st_zs | z-band (Sloan) [mag] | Brightness of the host star as measured using the z (Sloan) band in units of magnitudes. | st_zserr | st_zsstr | st_zslim |
| st_j2 | J-band (2MASS) [mag] | Brightness of the host star as measured using the J (2MASS) band in units of magnitudes. | st_j2err | st_j2str | st_j2lim |
| st_h2 | H-band (2MASS) [mag] | Brightness of the host star as measured using the H (2MASS) band in units of magnitudes. | st_h2err | st_h2str | st_h2lim |
| st_k2† | Ks-band (2MASS) [mag] | Brightness of the host star as measured using the K (2MASS) band in units of magnitudes. | st_k2err | st_k2str | st_k2lim |
| st_wise1 | WISE 3.4um [mag] | Brightness of the host star as measured using the 3.4um (WISE) band in units of magnitudes. | st_wise1err | st_wise1str | st_wise1lim |
| st_wise2 | WISE 4.6um [mag] | Brightness of the host star as measured using the 4.6um (WISE) band in units of magnitudes. | st_wise2err | st_wise2str | st_wise2lim |
| st_wise3 | WISE 12.um [mag] | Brightness of the host star as measured using the 12.um (WISE) band in units of magnitudes. | st_wise3err | st_wise3str | st_wise3lim |
| st_wise4 | WISE 22.um [mag] | Brightness of the host star as measured using the 22.um (WISE) band in units of magnitudes. | st_wise4err | st_wise4str | st_wise4lim |
Color Columns
| Database Column Name |
Column Label | Description | Uncertainties Column (positive +) (negative -) |
Displayed String Name | Limit Column |
|---|---|---|---|---|---|
| st_bmvj | B-V (Johnson) [mag] | Color of the star as measured by the difference between B and V (Johnson) bands. | st_bmvjerr | st_bmvjstr | st_bmvjlim |
| st_jmh2 | J-H (2MASS) [mag] | Color of the star as measured by the difference between J and H (2MASS) bands. | st_jmh2err | st_jmh2str | st_jmh2lim |
| st_hmk2 | H-Ks (2MASS) [mag] | Color of the star as measured by the difference between H and K (2MASS) bands. | st_hmk2err | st_hmk2str | st_hmk2lim |
| st_jmk2 | J-Ks (2MASS) [mag] | Color of the star as measured by the difference between K and K (2MASS) bands. | st_jmk2err | st_jmk2str | st_jmk2lim |
Last updated: 19 November 2021
