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Asteroid 20461 Dioretsa

Alternate IDs:
1999 LD31

Data sets with data for Asteroid 20461 Dioretsa:

Asteroid 20461 Dioretsa (top)

2MASS Asteroid and Comet Survey V2.0 (1 data product)

J MAGNITUDE 2MASS * J band selected magnitude in the 2MASS survey, or if the source is not detected in the J-band, the 95% confidence upper limit derived from a 4 arcsec radius aperture measurement taken at the position of the source on the Atlas Image. (The Atlas Images are quick-look images suitable for deriving positional information but not accurate photometry.) The origin of the magnitude is given by the first character of the rd_flg value.
(MAGNITUDE)
J MAGNITUDE 2MASS UNC * Corrected photometric uncertainty for the J-band magnitude in the 2MASS survey. If rd_flg[1]=2, this is the measurement error from the profile-fitting procedure, corrected to be consistent with observed repeatability statistics. If rd_flg[1]=1 or 4, this is the RMS of the brightness measured in aperture photometry on the individual frames. If rd_flg=3, the uncertainty is derived from the residuals to the 1-d radial profile fit (averaging over azimuth) to the unsaturated wings of the bright source. If J_MAG_SIG > 8.0, it is a flag value indicating that a meaningful uncertainty could not be determined for the source. This column is null if the magnitude is a 95% confidence upper limit (rd_flg[1]=0 or 6) or if the source is not measurable (rd_flg[1]=9).
(MAGNITUDE)
H MAGNITUDE 2MASS * H band selected magnitude in the 2MASS survey, or if the source is not detected in the H-band, the 95% confidence upper limit derived from a 4 arcsec radius aperture measurement taken at the position of the source on the Atlas Image. (The Atlas Images are quick-look images suitable for deriving positional information but not accurate photometry.) The origin of the magnitude is given by the second character of the rd_flg value.
(MAGNITUDE)
H MAGNITUDE 2MASS UNC * Corrected photometric uncertainty for the H-band magnitude in the 2MASS survey. If rd_flg[2]=2, this is the measurement error from the profile-fitting procedure, corrected to be consistent with observed repeatability statistics. If rd_flg[2]=1 or 4, this is the RMS of the brightness measured in aperture photometry on the individual frames. If rd_flg=3, the uncertainty is derived from the residuals to the 1-d radial profile fit (averaging over azimuth) to the unsaturated wings of the bright source. If H_MAG_SIG > 8.0, it is a flag value indicating that a meaningful uncertainty could not be determined for the source. This column is null if the magnitude is a 95% confidence upper limit (rd_flg[2]=0 or 6) or if the source is not measurable (rd_flg[2]=9).
(MAGNITUDE)
KS MAGNITUDE 2MASS * Ks band selected magnitude in the 2MASS survey, or if the source is not detected in the Ks-band, the 95% confidence upper limit derived from a 4 arcsec radius aperture measurement taken at the position of the source on the Atlas Image. (The Atlas Images are quick-look images suitable for deriving positional information but not accurate photometry.) The origin of the magnitude is given by the third character of the rd_flg value.
(MAGNITUDE)
KS MAGNITUDE 2MASS UNC * Corrected photometric uncertainty for the Ks-band magnitude in the 2MASS survey. If rd_flg[3]=2, this is the measurement error from the profile-fitting procedure, corrected to be consistent with observed repeatability statistics. If rd_flg[3]=1 or 4, this is the RMS of the brightness measured in aperture photometry on the individual frames. If rd_flg=3, the uncertainty is derived from the residuals to the 1-d radial profile fit (averaging over azimuth) to the unsaturated wings of the bright source. If KS_MAG_SIG > 8.0, it is a flag value indicating that a meaningful uncertainty could not be determined for the source. This column is null if the magnitude is a 95% confidence upper limit (rd_flg[3]=0 or 6) or if the source is not measurable (rd_flg[3]=9).
(MAGNITUDE)
17.045 0.189 16.766 16.300
17.431 17.696 15.516 0.272

Asteroid 20461 Dioretsa (top)

Properties Of Comet Nuclei (1 data product)

CNUCPROP COMET CLASS * Dynamic classification of the comet or object; either 'EC', for ecliptic comets; or 'NIC' for nearly-isotropic comets. If T[j] is the Tisserand parameter with respect to Jupiter, then ecliptic comets (EC) are those with 2 CNUCPROP TISSERAND JUPITER * Tisserand invariant parameter with respect to Jupiter. Value only to be used as an estimation. Used in the Properties of Cometary Nuclei data set. CNUCPROP EFF RADIUS * Effective radius, in kilometers, reported in CNUCPROP_SOURCE. Used in the Properties of Cometary Nuclei data set.
(KILOMETER)
CNUCPROP EFF RADIUS UPPER ERR * If an error bar was provided for the effective radius in the preceding column, this is the upper extent of it, in kilometers. In many cases the error bars were not symmetric. Used in the Properties of Cometary Nuclei data set.
(KILOMETER)
CNUCPROP EFF RADIUS LOWER ERR * If an error bar was provided for the effective radius in the preceding column, this is the lower extent of it, in kilometers. In many cases the error bars were not symmetric. Used in the Properties of Cometary Nuclei data set.
(KILOMETER)
CNUCPROP VISUAL ALBEDO * Visual geometric albedo. Note that in the published table, the column for visual albedo of 2101 Adonis and 222 Hephaistos contained the character '?', rather than a value or a hyphen (indicating no observation). This notation is not explained in Lamy et al. (2004), and has been converted to a zero (the 'no data' indicator) in this table. Used in the Properties of Cometary Nuclei data set. CNUCPROP ALBEDO UPPER ERR * Where error bars were provided, this column contains the upper end of the error bar for the given albedo. Used in the Properties of Cometary Nuclei data set. CNUCPROP ALBEDO LOWER ERR * Where error bars were provided, this column contains the lower end of the error bar for the given albedo. Used in the Properties of Cometary Nuclei data set. CNUCPROP NOTE FLAG * Notes from the original table are indicated by one of the following characters: a The radius is derived from the absolute magnitude reported by Levison et al. (2002) using an albedo of 0.03 m This object is an NEO associated with a meteor stream. X This object was not included in the published table. Used in the Properties of Cometary Nuclei data set. CNUCPROP SOURCE * Short reference for the published source of the information in this record. The complete citation is given in the accompanying file, 'reference_list.tab'. Used in the Properties of Cometary Nuclei data set.
NIC(HTC) -1.54 6.8 0.03 a Levison et al. (2002)


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