Data Preview 0.3

Data Preview 0.3 (ten-year version): Contains the catalog products of a Solar System Science Collaboration simulation of the results of SSO analysis of the wide-fast-deep data from the full LSST ten-year dataset.

SSObject

LSST-computed per-object quantities. 1:1 relationship with MPCORB. Recomputed daily, upon MPCORB ingestion.

Column Name	Data Type	Unit	Description [UCD]
ssObjectId	long		Unique identifier. [meta.id;meta.main;src]
discoverySubmissionDate	double	d	The date the LSST first linked and submitted the discovery observations to the MPC. May be NULL if not an LSST discovery. The date format will follow general LSST conventions (MJD TAI, at the moment).
firstObservationDate	double	d	The time of the first LSST observation of this object (could be precovered)
arc	float	d	Arc of LSST observations
numObs	int		Number of LSST observations of this object
MOID	float	AU	Minimum orbit intersection distance to Earth
MOIDTrueAnomaly	float	deg	True anomaly of the MOID point
MOIDEclipticLongitude	float	deg	Ecliptic longitude of the MOID point
MOIDDeltaV	float	km/s	DeltaV at the MOID point
u_H	float	mag	Best fit absolute magnitude (u band)
u_G12	float	mag	Best fit G12 slope parameter (u band)
u_HErr	float	mag	Uncertainty of H (u band) [stat.error]
u_G12Err	float	mag	Uncertainty of G12 (u band) [stat.error]
u_H_uG12_Cov	float	mag**2	H-G12 covariance (u band) [stat.covariance]
u_Chi2	float		Chi^2 statistic of the phase curve fit (u band) [stat.fit.chi2]
u_Ndata	int		The number of data points used to fit the phase curve (u band)
g_H	float	mag	Best fit absolute magnitude (g band)
g_G12	float	mag	Best fit G12 slope parameter (g band)
g_HErr	float	mag	Uncertainty of H (g band) [stat.error]
g_G12Err	float	mag	Uncertainty of G12 (g band) [stat.error]
g_H_gG12_Cov	float	mag**2	H-G12 covariance (g band) [stat.covariance]
g_Chi2	float		Chi^2 statistic of the phase curve fit (g band) [stat.fit.chi2]
g_Ndata	int		The number of data points used to fit the phase curve (g band)
r_H	float	mag	Best fit absolute magnitude (r band)
r_G12	float	mag	Best fit G12 slope parameter (r band)
r_HErr	float	mag	Uncertainty of H (r band) [stat.error]
r_G12Err	float	mag	Uncertainty of G12 (r band) [stat.error]
r_H_rG12_Cov	float	mag**2	H-G12 covariance (r band) [stat.covariance]
r_Chi2	float		Chi^2 statistic of the phase curve fit (r band) [stat.fit.chi2]
r_Ndata	int		The number of data points used to fit the phase curve (r band)
i_H	float	mag	Best fit absolute magnitude (i band)
i_G12	float	mag	Best fit G12 slope parameter (i band)
i_HErr	float	mag	Uncertainty of H (i band) [stat.error]
i_G12Err	float	mag	Uncertainty of G12 (i band) [stat.error]
i_H_iG12_Cov	float	mag**2	H-G12 covariance (i band) [stat.covariance]
i_Chi2	float		Chi^2 statistic of the phase curve fit (i band) [stat.fit.chi2]
i_Ndata	int		The number of data points used to fit the phase curve (i band)
z_H	float	mag	Best fit absolute magnitude (z band)
z_G12	float	mag	Best fit G12 slope parameter (z band)
z_HErr	float	mag	Uncertainty of H (z band) [stat.error]
z_G12Err	float	mag	Uncertainty of G12 (z band) [stat.error]
z_H_zG12_Cov	float	mag**2	H-G12 covariance (z band) [stat.covariance]
z_Chi2	float		Chi^2 statistic of the phase curve fit (z band) [stat.fit.chi2]
z_Ndata	int		The number of data points used to fit the phase curve (z band)
y_H	float	mag	Best fit absolute magnitude (y band)
y_G12	float	mag	Best fit G12 slope parameter (y band)
y_HErr	float	mag	Uncertainty of H (y band) [stat.error]
y_G12Err	float	mag	Uncertainty of G12 (y band) [stat.error]
y_H_yG12_Cov	float	mag**2	H-G12 covariance (y band) [stat.covariance]
y_Chi2	float		Chi^2 statistic of the phase curve fit (y band) [stat.fit.chi2]
y_Ndata	int		The number of data points used to fit the phase curve (y band)
maxExtendedness	float		maximum `extendedness` value from the DIASource
minExtendedness	float		minimum `extendedness` value from the DIASource
medianExtendedness	float		median `extendedness` value from the DIASource
flags	long		Flags, bitwise OR tbd. [meta.code]

DiaSource

Table to store 'difference image sources' - sources detected at SNR >=5 on difference images.

Column Name	Data Type	Unit	Description [UCD]
diaSourceId	long		Unique id. [meta.id;meta.main;src]
ccdVisitId	long		Id of the ccdVisit where this diaSource was measured. Note that we are allowing a diaSource to belong to multiple amplifiers, but it may not span multiple ccds. [meta.id;obs.image]
diaObjectId	long		Id of the diaObject this source was associated with, if any. If not, it is set to NULL (each diaSource will be associated with either a diaObject or ssObject). [meta.id;src]
ssObjectId	long		Id of the ssObject this source was associated with, if any. If not, it is set to NULL (each diaSource will be associated with either a diaObject or ssObject). [meta.id;src]
nameTrue	char		MPC or simulation designation of the moving object
ssObjectReassocTime	timestamp		Time when this diaSource was reassociated from diaObject to ssObject (if such reassociation happens, otherwise NULL).
midPointMjdTai	double	d	Effective mid-exposure time for this diaSource. [time.epoch]
ra	double	deg	RA-coordinate of the center of this diaSource. [pos.eq.ra]
raErr	float	deg	Uncertainty of ra. [stat.error;pos.eq.ra]
dec	double	deg	Dec-coordinate of the center of this diaSource. [pos.eq.dec]
decErr	float	deg	Uncertainty of dec. [stat.error;pos.eq.dec]
ra_dec_Cov	float	deg**2	Covariance between ra and dec. [stat.covariance]
snr	float		The signal-to-noise ratio at which this source was detected in the difference image. [stat.snr]
band	char		Name of the band used to take the exposure where this source was measured
mag	float		Magnitude. This is a placeholder and should be replaced by flux.
magErr	float		Magnitude error. This is a placeholder and should be replaced by flux error.
magTrueVband	float		True (noiseless) V-band magnitude of the simulated diaSource
raTrue	double		True (noiseless) right ascension of the simulated diaSource
decTrue	double		True (noiseless) declination of the simulated diaSource

SSSource

LSST-computed per-source quantities. 1:1 relationship with DiaSource. Recomputed daily, upon MPCORB ingestion.

Column Name	Data Type	Unit	Description [UCD]
ssObjectId	long		Unique identifier of the object. [meta.id;src]
diaSourceId	long		Unique identifier of the observation [meta.id;meta.main;src]
mpcUniqueId	long		MPC unique identifier of the observation
eclipticLambda	double	deg	Ecliptic longitude
eclipticBeta	double	deg	Ecliptic latitude
galacticL	double	deg	Galactic longitude
galacticB	double	deg	Galactic latitute
phaseAngle	float	deg	Phase angle
heliocentricDist	float	AU	Heliocentric distance
topocentricDist	float	AU	Topocentric distace
predictedMagnitude	float	mag	Predicted magnitude
predictedMagnitudeErr	float	mag	Prediction uncertainty (1-sigma)
residualRa	double	deg	Residual R.A. vs. ephemeris
residualDec	double	deg	Residual Dec vs. ephemeris
predictedRaErr	float	deg	Predicted R.A. uncertainty
predictedDecErr	float	deg	Predicted Dec uncertainty
predictedRaDecCov	float	deg**2	Predicted R.A./Dec covariance
heliocentricX	float	AU	Cartesian heliocentric X coordinate (at the emit time)
heliocentricY	float	AU	Cartesian heliocentric Y coordinate (at the emit time)
heliocentricZ	float	AU	Cartesian heliocentric Z coordinate (at the emit time)
heliocentricVX	float	AU	Cartesian heliocentric X velocity (at the emit time)
heliocentricVY	float	AU	Cartesian heliocentric Y velocity (at the emit time)
heliocentricVZ	float	AU	Cartesian heliocentric Z velocity (at the emit time)
topocentricX	float	AU	Cartesian topocentric X coordinate (at the emit time)
topocentricY	float	AU	Cartesian topocentric Y coordinate (at the emit time)
topocentricZ	float	AU	Cartesian topocentric Z coordinate (at the emit time)
topocentricVX	float	AU	Cartesian topocentric X velocity (at the emit time)
topocentricVY	float	AU	Cartesian topocentric Y velocity (at the emit time)
topocentricVZ	float	AU	Cartesian topocentric Z velocity (at the emit time)

MPCORB

The orbit catalog produced by the Minor Planet Center. Ingested daily. O(10M) rows by survey end. The columns are described at https://minorplanetcenter.net//iau/info/MPOrbitFormat.html

Column Name	Data Type	Unit	Description [UCD]
mpcDesignation	char		MPCORB: Number or provisional designation (in packed form) [meta.id;src]
mpcNumber	int		MPC number (if the asteroid has been numbered; NULL otherwise). Provided for convenience.
ssObjectId	long		LSST unique identifier (if observed by LSST) [meta.id;src]
mpcH	float	mag	MPCORB: Absolute magnitude, H
mpcG	float		MPCORB: Slope parameter, G
epoch	double	d	MPCORB: Epoch (in MJD, .0 TT)
tperi	double	d	MPCORB: MJD of pericentric passage
peri	double	deg	MPCORB: Argument of perihelion, J2000.0 (degrees)
node	double	deg	MPCORB: Longitude of the ascending node, J2000.0 (degrees)
incl	double	deg	MPCORB: Inclination to the ecliptic, J2000.0 (degrees)
e	double		MPCORB: Orbital eccentricity
n	double	deg/d	MPCORB: Mean daily motion (degrees per day)
q	double	AU	MPCORB: Perihelion distance (AU)
uncertaintyParameter	char		MPCORB: Uncertainty parameter, U
reference	char		MPCORB: Reference
nobs	int		MPCORB: Number of observations
nopp	int		MPCORB: Number of oppositions
arc	float	d	MPCORB: Arc (days), for single-opposition objects
arcStart	timestamp		MPCORB: Year of first observation (for multi-opposition objects)
arcEnd	timestamp		MPCORB: Year of last observation (for multi-opposition objects)
rms	float	arcsec	MPCORB: r.m.s residual (")
pertsShort	char		MPCORB: Coarse indicator of perturbers (blank if unperturbed one-opposition object)
pertsLong	char		MPCORB: Precise indicator of perturbers (blank if unperturbed one-opposition object)
computer	char		MPCORB: Computer name
flags	int		MPCORB: 4-hexdigit flags. See https://minorplanetcenter.net//iau/info/MPOrbitFormat.html for details
fullDesignation	char		MPCORB: Readable designation
lastIncludedObservation	float	d	MPCORB: Date of last observation included in orbit solution