J/A+A/635/A54 SBNAF Infrared Database (Szakats, 2020)
Small Bodies: Near and Far Database for thermal infrared observations of small
bodies in the Solar System.
Szakats R., Mueller T., Ali-Lagoa V., Marton G., Farkas-Takacs A.,
Banyai E., Kiss C.
<Astron. Astrophys. 635, A54 (2020)>
=2020A&A...635A..54S 2020A&A...635A..54S (SIMBAD/NED BibCode)
ADC_Keywords: Minor planets ; Infrared sources ; Photometry, infrared ;
Solar system
Keywords: astronomical databases: miscellaneous -
minor planets, asteroids: general - infrared: general
Abstract:
In this paper, we present the Small Bodies: Near and Far (SBNAF)
Infrared Database, an easy-to-use tool intended to facilitate the
modelling of thermal emission of small bodies of the Solar System. Our
database collects measurements of thermal emissions for small Solar
System targets that are otherwise available in scattered sources and
provides a complete description of the data, including all information
necessary to perform direct scientific analyses and without the need
to access additional external resources. This public database contains
representative data of asteroid observations of large surveys (e.g.
AKARI, IRAS, and WISE) as well as a collection of small body
observations of infrared space telescopes (e.g. the Herschel Space
Observatory) and provides a web interface to access this data
(https://ird.konkoly.hu).We also provide an example for the direct
application of the database and show how it can be used to estimate
the thermal inertia of specific populations, e.g. asteroids within a
given size range. We show how different scalings of thermal inertia
with heliocentric distance (i.e. temperature) may affect our
interpretation of the data and discuss why the widely-used radiative
conductivity exponent (alpha=-3/4) might not be adequate in general,
as suggested in previous studies.
Description:
Collected infrared measurements of asteroids from the following
observatories or space missions: WISE, AKARI, HSO, MSX, IRAS. The
catalog right now (2020.01.29.) contains 170149 records. The database
contains not only the collected IR fluxes, but the computed
monochromatic flux densities and a wide range of supplementary
information, e.g. the targets orbital and if available, the physical
parameters. Most of these data was extracted from JPL/Horizons.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 1189 170149 SBNAF Infrared Database
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See also:
https://ird.konkoly.hu : SBNAF public database
http://www.mpe.mpg.de/~tmueller/sbnaf : Small Bodies Near & Far Home Page
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 7 I7 --- NAIFId NASA's NAIF solar system object code of
the target (naifid)
9- 24 A16 --- Target Name or designation of the asteroid
(targetname)
26- 30 A5 --- obsProj Name of the observatory or space mission
(observatory)
32- 39 A8 --- obsCode JPL/Horizons code of the observatory or
spacecraft (observatory)
41- 49 A9 --- Inst Instrument of the observatory or spacecraft
used in that specific measurement
(instrument)
51- 57 A7 --- obsMode Observation mode (obsmode)
59- 68 I10 --- obsIDs ? Mission-specific identifier of the
observation, e.g. OBSID for Herschel
(observation)
70- 82 F13.5 d Obs.dateS Start time of the measurement (obsstartt)
84- 96 F13.5 d Obs.dateM Mid-time of the measurement (obsmidtim)
98- 110 F13.5 d Obs.dateE End time of the measurement (obsendtim)
112- 135 A24 "datime" Obs.date Observation date in YYYY:MM:DDhh:mm:ss.sss
(datetime)
137- 143 A7 --- Filter Name of the filter/band used for the
specific observation (band_filter)
145- 154 F10.6 Jy Flux In-band photometric flux density, with all
photometric corrections applied, including
aperture/encircled energy fraction
corrections, but without colour correction
(inband_flux)
156- 176 E21.18 Jy e_Flux Uncertainty of the in-band photometric flux
density "Flux" (1)
178- 179 A2 --- qualflag If exists, the quality flag of the
observation (quality_flags)
181- 200 F20.16 au A Semi-major axis of the target's
orbit (A) (2)
202- 221 F20.18 --- EC Eccentricity of the target's orbit (EC) (2)
223- 242 F20.17 deg IN Inclination of the target's orbit (IN) (2)
244- 264 F21.17 deg OM Longitude of the ascending node of the
target's orbit (OM) (2)
266- 287 F22.18 deg W Argument of the periapsis of the target's
orbit (W) (2)
289- 309 E21.19 deg MA Mean anomaly of the target's orbit (MA) (2)
311- 316 F6.3 mag H ? Absolute magnitude of the target (H) (2)
318- 323 F6.3 --- G "G" slope parameter (G) (2)(3)
325- 332 F8.4 km Radius Estimated radius of the target (radius) (2)
334- 339 F6.4 --- Albedo Estimated V-band geometric albedo of the
target (albedo) (2)
341- 349 F9.5 deg RAdeg Right ascension (J2000) of the target at
observation mid-time (RA) (2)
351- 359 F9.5 deg DEdeg Declination (J2000) of the target at
observation mid-time (DEC) (2)
361- 383 E23.20 arcsec/s RArate Rate of change in right ascension
(RA_rate) (2)
385- 407 E23.20 arcsec/s DErate Rate of change in declination
(DEC_rate) (2)
409- 413 F5.2 mag Vmag Estimated apparent brightness of the target
in V-band at observation mid-time (V) (2)
415- 429 F15.12 au r Heliocentric distance of the target at
observation mid-time (r) (2)
431- 447 F17.14 au delta Observer to target distance at observation
mid-time (delta) (2)
449- 470 F22.16 s lighttime Elapsed time since light (observed at
print-time) would have left or reflected
off a point at the center of the target
(lighttime)
472- 479 F8.4 deg elong Target's apparent solar elongation seen
from the observer location at print-time
(elongation) (2)
481- 482 A2 --- opp-flag [/LT ] Flag regarding the target's apparent
position relative to the Sun in the
observer's sky (opposition_flag) (2) (5)
484- 489 F6.2 deg alpha Sun-Target-Observer angle at observation
mid-time (alpha) (2)
491- 501 F11.7 deg ObsELon Observer-centered Earth ecliptic-of-date
longitude of the target center's apparent
position, adjusted for light-time, the
gravitational deflection of light and
stellar aberration (ObsEclLon) (2)
503- 513 E11.7 deg ObsELat Observer-centered Earth ecliptic-of-date
latitude of the target center's apparent
position, adjusted for light-time, the
gravitational deflection of light and
stellar aberration (ObsEclLat) (2)
515- 536 E22.16 au TgtXsun Sun-centered X Cartesian coordinate of the
target body at observation mid-time
(targetXsun) (4)
538- 559 E22.17 au TgtYsun Sun-centered Y Cartesian coordinate of the
target body at observation mid-time
(targetYsun) (4)
561- 582 E22.19 au TgtZsun Sun-centered Z Cartesian coordinate of the
target body at observation mid-time
(targetZsun) (4)
584- 605 E22.18 au TgtXobs Observer-centered X Cartesian coordinate of
the target body at observation mid-time
(targetXobs) (4)
607- 628 E22.18 au TgtYobs Observer-centered Y Cartesian coordinate of
the target body at observation mid-time
(targetYobs) (4)
630- 651 E22.18 au TgtZobs Observer-centered Z Cartesian coordinate of
the target body at observation mid-time
(targetZobs) (4)
653- 673 E21.18 au obsXsun Sun-centered X Cartesian coordinate of the
observer at observation mid-time
(obsXsun) (4)
675- 695 E21.18 au obsYsun Sun-centered Y Cartesian coordinate of the
observer at observation mid-time
(obsYsun) (4)
697- 718 E22.19 au obsZsun Sun-centered Z Cartesian coordinate of the
observer at observation mid-time
(obsZsun) (4)
720- 725 F6.2 um RefFilter Reference wavelength of the measuring
filter (ref_wavelengths)
727- 731 F5.3 --- ccf Colour correction factor applied to obtain
monochromatic flux density from in-band
flux density (cc_factor)
733- 742 F10.6 Jy ccFlux Monochromatic flux density
(colour corrected in-band flux density)
(cc_flux)
744- 765 F22.18 Jy e_ccFlux Absolute uncertainty of the monochromatic
flux density including the uncertainty of
the absolute flux calibration
(absolute_fl)
767-1026 A260 --- Com Comments (comments_remarks) (6)
1028-1041 F14.6 d LTcorEp The light time corrected epoch, calculated
as obsmidtime-lighttime /3600./24
(LTcorrected)
1043-1076 A34 --- Refs Publications and resources which the
photometric data were taken from
(documents_r) (7)
1078-1141 A64 --- inTable Name of the input file which the database
was generated from. Only for internal use
(input_table)
1143-1161 A19 --- last-mod Date when the record was last modified, in
"human readable" format:
YYYY-MMM-DD hh:mm:ss (last_modified)
1163-1189 A27 --- Aname Possible alternative names for the object,
like asteroid number and provisional
designation, separated by '#'
(alttarget)
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Note (1): with all direct photometric errors considered, but without errors
related to the spectral energy distribution of the target (colour correction),
and also without the consideration of the absolute photometric error of the
instrument (inband_flux).
Note (2): Data/value was retrieved from JPL/Horizons
Note (3): See Bowell et al. (1989, Application of photometric models to
asteroids. In: Gehrels, T., Matthews, M.T., Binzel, R.P. (Eds.), Asteroids II.
University of Arizona Press, pp. 524-555.).
Note that the default slope parameter in the Horizons system is the
canonical G=0.15, also used as a generally accepted value in applications when
specific values are not available (see e.g. ExploreNEO,
Trilling et al. 2010AJ....140..770T 2010AJ....140..770T; Harris et al. 2011AJ....141...75H 2011AJ....141...75H).
Note (4): In the reference frame defined in Archinal et al.
(2011, CeMDA 109, 101)
Note (5): Flag as follows:
/T = indicates trailing
/L = leading position with respect to the Sun
Note (6): Comments regarding the quality of the measurement or information when
an assumed value was applied in the calculations; e.g. indicating whether the
target is (also) regarded as a comet in JPL/Horizons; non standard value of
geometric albedo is also marked here when it is not taken from JPL/Horizons
Note (7): For the reference codes see: https://ird.konkoly.hu/ReleaseNote
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Acknowledgements:
Robert Szakats, szakats.robert(at)csfk.mta.hu
(End) Robert Szakats [Konkoly Obs., Hungary], Patricia Vannier [CDS] 29-Jan-2020