Description: Contains the positional information for objects in a number of coordinate systems. The objects associate single epoch detections and the stacked detections within a one arcsecond radius. The mean position from the single epoch data is used as the basis for coordinates when available, or the position of an object in the stack when it is not. The right ascension and declination for both the stack and single epoch mean is provided. The number of detections in each filter from single epoch data is listed, along with which filters the object has a stack detection. References: Szalay, A. S., Gray, J., Fekete, G., et al. 2007, arXiv:cs/0701164.
Note that as of June 2022 the raMean and decMean positions have been updated using Gaia EDR3 and new columns have been added with proper motions for a subset of objects. See the PS1 Astrometry Correction Using Gaia EDR3 for more information.
Name
Unit
Data Type
Size
Default Value
Description
objName
dimensionless
VARCHAR(32)
32
NA
IAU name for this object.
objPSOName
dimensionless
VARCHAR(32)
32
NA
Alternate Pan-STARRS name for this object.
objAltName1
dimensionless
VARCHAR(32)
32
NA
Alternate name for this object.
objAltName2
dimensionless
VARCHAR(32)
32
Altername name for this object.
objAltName3
dimensionless
VARCHAR(32)
32
Altername name for this object.
objPopularName
dimensionless
VARCHAR(140)
140
Well known name for this object.
objID
dimensionless
BIGINT
8
NA
Unique object identifier.
uniquePspsOBid
dimensionless
BIGINT
8
NA
Unique internal PSPS object identifier.
ippObjID
dimensionless
BIGINT
8
NA
IPP internal object identifier.
surveyID
dimensionless
TINYINT
1
NA
Survey identifier. Details in the Survey table.
htmID
dimensionless
BIGINT
8
NA
Hierarchical triangular mesh (Szalay 2007) index.
zoneID
dimensionless
INT
4
NA
Local zone index, found by dividing the sky into bands of declination 1/2 arcminute in height: zoneID = floor((90 + declination)/0.0083333).
tessID
dimensionless
TINYINT
1
0
Tessellation identifier. Details in the TessellationType table.
projectionID
dimensionless
SMALLINT
2
-1
Projection cell identifier.
skyCellID
dimensionless
TINYINT
1
255
Skycell region identifier.
randomID
dimensionless
FLOAT
8
NA
Random value drawn from the interval between zero and one.
Subset of objInfoFlag denoting whether this object is real or a likely false positive. Values listed in ObjectQualityFlags and here
raStack
degrees
FLOAT
8
-999
Right ascension from stack detections, weighted mean value across filters, in equinox J2000. See StackObjectThin for stack epoch information.
decStack
degrees
FLOAT
8
-999
Declination from stack detections, weighted mean value across filters, in equinox J2000. See StackObjectThin for stack epoch information.
raStackErr
arcsec
REAL
4
-999
Right ascension standard deviation from stack detections.
decStackErr
arcsec
REAL
4
-999
Declination standard deviation from stack detections.
raMean
degrees
FLOAT
8
-999
Right ascension from single epoch detections (weighted mean) in equinox J2000 at the mean epoch given by epochMean.
decMean
degrees
FLOAT
8
-999
Declination from single epoch detections (weighted mean) in equinox J2000 at the mean epoch given by epochMean.
raMeanErr
arcsec
REAL
4
-999
Right ascension standard deviation from single epoch detections.
decMeanErr
arcsec
REAL
4
-999
Declination standard deviation from single epoch detections.
pmra
milliarcseconds per year
FLOAT
8
NULL
Proper motion in right ascension direction from single epoch detections.
pmdec
milliarcseconds per year
FLOAT
8
NULL
Proper motion in right ascension direction from single epoch detections.
pmraErr
milliarcseconds per year
FLOAT
8
NULL
RA proper motion standard deviation.
pmdecErr
milliarcseconds per year
FLOAT
8
NULL
Dec proper motion standard deviation.
epochMean
days
FLOAT
8
-999
Modified Julian Date of the mean epoch corresponding to raMean, decMean and pmra, pmdec (equinox J2000). This is a weighted mean of the PS1 observation epochs.
posMeanChisq
dimensionless
REAL
4
-999
Reduced chi squared value of mean position.
cx
dimensionless
FLOAT
8
NA
Cartesian x on a unit sphere.
cy
dimensionless
FLOAT
8
NA
Cartesian y on a unit sphere.
cz
dimensionless
FLOAT
8
NA
Cartesian z on a unit sphere.
lambda
degrees
FLOAT
8
-999
Ecliptic longitude.
beta
degrees
FLOAT
8
-999
Ecliptic latitude.
l
degrees
FLOAT
8
-999
Galactic longitude.
b
degrees
FLOAT
8
-999
Galactic latitude.
nStackObjectRows
dimensionless
SMALLINT
2
-999
Number of independent StackObjectThin rows associated with this object.