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Asteroid 2426 Simonov (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)
14.659	0.034	14.310	0.048	14.343	0.091
14.899	0.039	14.604	0.058	14.487	0.089
15.010	0.043	14.791	0.076	14.745	0.088
15.165	0.054	15.030	0.069	14.807	0.131
15.279	0.063	14.913	0.070	14.842	0.145

Asteroid 2426 Simonov (top)

Asteroid Absolute Magnitudes V12.0 (1 data product)

ABSOLUTE VISUAL MAGNITUDE * IAU-adopted absolute V magnitude (H) (MAGNITUDE)	SLOPE PARAMETER * IAU-adopted slope parameter (G)	SLOPE PARAMETER ORIGIN FLAG * Those slope parameters that were determined by fitting the IAU-adopted phase function to data are given an origin code letter of 'f' (for 'fitted'); all others are given a code letter of 'a' (for 'assumed').	MPC REFERENCE * Minor Planet Circular (MPC) or Minor Planet Orbit Supplement (MPO) reference
11.4	0.15	a	MPC 17265

Asteroid 2426 Simonov (top)

Asteroid Albedos (1 data product)

MIMPS ALBEDO * Mean geometric visual albedo on the H,G magnitude system, from the MSX Infrared Minor Planet Survey (MIMPS).	MIMPS ALBEDO UNC * 1-sigma uncertainty in the mean geometric visual albedo from the MSX Infrared Minor Planet Survey (MIMPS).
0.0842	0.014

Asteroid 2426 Simonov (top)

Asteroid Dynamical Families V4.1 (1 data product)

ZAPPALA FAMILY NAME * Familiy name in the family analysis of Zappala et al. (1995)	ZAPPALA CLUMP FLAG * Indicates whether the Zappala family designation is a clump or a family, as defined in Zappala et al. (1995). F = family, C = clump.	ZAPPALA FAMILY CONFIDENCE LEVEL * Confidence level of Zappala family membership, defined as quality code (QC) in Zappala et al. 1995.

Asteroid 2426 Simonov (top)

Asteroid Lightcurve Derived Data V16.0 (1 data product)

LC PERIOD * Rotation period of the asteroid about its axis, in hours, in the asteroid lightcurve parameters file. The period given is synodic unless the S flag (sidereal) is set in P_FLAG. (HOUR)	LC PERIOD ERR * Error in the rotational period given in the asteroid lightcurve parameters file. (HOUR)	LC AMPLITUDE MAXIMUM * Lightcurve amplitude maximum in the asteroid lightcurve parameters file. In cases where a range of amplitudes is given, this field is the upper limit of the range. In cases where a single value is given for the amplitude, this field is that value and a null value is given for AMP_MIN. Both AMP_MIN and AMP_MAX contain a null value if the publication did not include an amplitude. (MAGNITUDE)	LC AMPLITUDE ERR * Error in the lightcurve amplitudes given in the asteroid lightcurve parameters file. (MAGNITUDE)	LC QUALITY CODE * This code describes the reliability of the lightcurve results in the asteroid lightcurve parameters file, and takes the following values: 0 - Result later proven incorrect. This appears only on records of individual observations. 1 - Result based on fragmentary lightcurve(s), may be completely wrong. 2 - Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Also, a quality of 2 is used to note results where an ambiguity exists as to the number of extrema per cycle or the number of elapsed cycles between lightcurves. Hence the result may be wrong by an integer ratio. 3 - Denotes a secure result with no ambiguity and full lightcurve coverage. 4 - In addition to full coverage, denotes that a pole position is reported. In some cases, the numerical quality code may be followed by a plus or minus sign, indicating that the reliability is judged somewhat better (+) or worse (-) than implied by an un-signed number alone. This refinement in scale has been only recently added, and not yet retroactively, so most entries don't have signs, even in some cases where they would be appropriate.	LC NOTES * Notes pertaining to the lightcurve reported in the asteroid lightcurve parameters file. These are one-letter flags, one or more of which may appear in the column. ? - Usually tied with 'T' to indicate uncertainty. 1 - Monomodal curve (one min/max per rotation) 3 - Trimodal curve (three min/max per rotation) 4 - Quadrimodal curve (four min/max per rotation) A - Ambiguous period D - Period determined by us that differs from that given in the original publication E - Occultation observation H - Space telescope observations I - IR/Thermal observations M - Polarimetric observation N - No lightcurve published O - Adaptive optics observation P - Photographic photometry R - Radar observation T - Tumbling (Non-principal axis rotation - see lc_npa.tab for details) V - Visual photometry Additional flags associated with the T flag are as follows: None after the T - The asteroid is definitely tumbling ? : Possible tumbler 0 : The tumbling damping timescale is long enough that tumbling might be expected, but observations are not sufficient to substantiate either tumbling or not tumbling. - : The tumbling damping timescale is long enough that tumbling might be expected, but observations indicate the object is NOT tumbling. + : The tumbling damping timescale is short enough that tumbling would not seem likely, however, observations indicate that it may be tumbling or actually is tumbling.	LC REFERENCE ID * A short version of the reference citation for the published paper in which the values in this entry (in the asteroid lightcurve parameters file) were reported. The full citations may be found in the file lc_references.tab.
				.	I	SIMPS
5.811	0.002	0.40	0.03	3		Pray 2005b
				.	I	WISE
				.	I	AKARI

Asteroid 2426 Simonov (top)

Asteroid Names and Discovery V12.0 (1 data product)

DISCOVERY DATE * Date of discovery of an object	DISCOVERY LOCATION * Location where the discovery observation of an object was made	DISCOVERER NAMES * The name(s) of the discoverer(s) of an object
1976-05-26	Nauchnyj	Chernykh, N.

Asteroid 2426 Simonov (top)

IRAS Minor Planet Survey V6.0 (1 data product)

SIMPS MEAN ALBEDO * Mean derived geometric albedo on the H,G system from the Supplemental IRAS Minor Planet Survey (SIMPS).	SIMPS MEAN ALBEDO UNC * 1-sigma uncertainty in the mean derived geometric albedo from the Supplemental IRAS Minor Planet Survey (SIMPS), due solely to the precision of the IRAS flux data.	SIMPS MEAN DIAMETER * Mean diameter from the Supplemental IRAS Minor Planet Survey (SIMPS), computed from H and SIMPS_MEAN_ALBEDO (KILOMETERS)	SIMPS MEAN DIAMETER UNC * 1-sigma uncertainty in the mean diameter from the Supplemental IRAS Minor Planet Survey (SIMPS), due solely to the precision of the IRAS flux data.	SIMPS PLC * Probability of lightcurve variation, estimated in the Supplemental IRAS Minor Planet Survey (SIMPS). This quantity is used as a measure of the probability that a lightcurve effect is present in the data. Values are constrained to be between 0.10 and 1.00. Less than significant variation is assigned a value of 0.10.
0.0842	0.014	24.04	1.8	0.10

Asteroid 2426 Simonov (top)

NEOWISE Diameters and Albedos V1.0 (1 data product)

NEOWISE DIAMETER * NEOWISE best-fit effective spherical diameter, or assumed value if not fitted. (KILOMETER)	NEOWISE DIAMETER UNCERTAINTY * NEOWISE unceratinty in the best-fit effective spherical diameter, or assumed value if not fitted. (KILOMETER)	NEOWISE V ALBEDO * NEOWISE best-fit visible geometric albedo, or assumed value if not fitted.	NEOWISE V ALBEDO UNCERTAINTY * NEOWISE uncertainty of the best-fit visible geometric albedo, or assumed value if not fitted.	NEOWISE THERMAL BEAMING PARAMETER * NEOWISE best-fit NEATM thermal beaming parameter, or assumed value if not fitted.	NEOWISE THERMAL BEAMING PARAMETER UNCERTAINTY * NEOWISE uncertainty of the best-fit NEATM thermal beaming parameter, or assumed value if not fitted.	NEOWISE REFERENCE CODE * NEOWISE reference code to the original publication of fitted parameters. See the refrence.tab in the dataset for the full reference
25.654	0.106	0.074	0.014	0.965	0.014	Mas14
28.253	9.921	0.046	0.047	0.950	0.207	Nug15
21.956	6.916	0.074	0.051	0.950	0.198	Nug15

Asteroid 2426 Simonov (top)

NEOWISE Diameters and Albedos V2.0 (1 data product)

ABSOLUTE VISUAL MAGNITUDE * IAU-adopted absolute V magnitude (H) (magnitudes)	SLOPE PARAMETER * IAU-adopted slope parameter (G)	OBSERVATION DATE * Date of observation (day)	NEOWISE DIAMETER * NEOWISE best-fit effective spherical diameter, or assumed value if not fitted. (kilometer)	NEOWISE DIAMETER UNCERTAINTY * NEOWISE unceratinty in the best-fit effective spherical diameter, or assumed value if not fitted. (kilometer)	NEOWISE V ALBEDO * NEOWISE best-fit visible geometric albedo, or assumed value if not fitted.	NEOWISE V ALBEDO UNCERTAINTY * NEOWISE uncertainty of the best-fit visible geometric albedo, or assumed value if not fitted.	NEOWISE THERMAL BEAMING PARAMETER * NEOWISE best-fit NEATM thermal beaming parameter, or assumed value if not fitted.	NEOWISE THERMAL BEAMING PARAMETER UNCERTAINTY * NEOWISE uncertainty of the best-fit NEATM thermal beaming parameter, or assumed value if not fitted.	NEOWISE REFERENCE CODE * NEOWISE reference code to the original publication of fitted parameters. See the refrence.tab in the dataset for the full reference
11.40	+0.15	2455328.6990040	25.654	0.106	0.074	0.014	0.965	0.014	Mas14
11.60	+0.15	2456714.9993065	28.253	9.921	0.046	0.047	0.950	0.200	Nug15
11.60	+0.15	2456993.5251889	21.956	6.916	0.074	0.051	0.950	0.200	Nug15
11.60	+0.15	2457154.9956154	24.250	6.312	0.049	0.034	0.950	0.200	Nug16
11.60	+0.15	2457633.2743209	27.313	8.831	0.045	0.055	0.950	0.200	Mas17

Asteroid 2426 Simonov (top)

Near-Infrared Photometry of Asteroids From DENIS V1.0 (1 data product)

OBSERVATION DATE * Date of observation (DAY)	DENIS I MAGNITUDE * I magnitude in the DENIS (Deep European Near-Infrared southern sky) survey. (MAGNITUDE)	DENIS I MAGNITUDE ERROR * Error in the I magnitude in the DENIS (Deep European Near-Infrared southern sky) survey. (MAGNITUDE)	DENIS J MAGNITUDE * J magnitude in the DENIS (Deep European Near-Infrared southern sky) survey. (MAGNITUDE)	DENIS J MAGNITUDE ERROR * Error in the J magnitude in the DENIS (Deep European Near-Infrared southern sky) survey. (MAGNITUDE)	DENIS KS MAGNITUDE * Ks magnitude in the DENIS (Deep European Near-Infrared southern sky) survey. (MAGNITUDE)	DENIS KS MAGNITUDE ERROR * Error in the Ks magnitude in the DENIS (Deep European Near-Infrared southern sky) survey. (MAGNITUDE)
2451556.796319	15.90	0.05	15.26	0.16	99.99	9.99

Asteroid 2426 Simonov

Data sets with data for Asteroid 2426 Simonov:

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

Asteroid Absolute Magnitudes V12.0 (1 data product)

Asteroid Albedos (1 data product)

Asteroid Dynamical Families V4.1 (1 data product)

Asteroid Lightcurve Derived Data V16.0 (1 data product)

Asteroid Names and Discovery V12.0 (1 data product)

IRAS Minor Planet Survey V6.0 (1 data product)

NEOWISE Diameters and Albedos V1.0 (1 data product)

NEOWISE Diameters and Albedos V2.0 (1 data product)

Near-Infrared Photometry of Asteroids From DENIS V1.0 (1 data product)