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J/A+A/505/1297      Hawaii Trails Project                    (Hsieh, 2009)

The Hawaii Trails Project: Comet-Hunting in the Main Asteroid Belt. Hsieh H.H. <Astron. Astrophys. 505, 1297 (2009)> =2009A&A...505.1297H
ADC_Keywords: Surveys ; Minor planets Keywords: Comets: general - comets: individual: 133P/Elst-Pizarro - comets: individual: 176P/LINEAR - minor planets, asteroids - solar system: general Abstract: The mysterious solar system object 133P/(7968) Elst-Pizarro is dynamically asteroidal, yet displays recurrent comet-like dust emission. Two scenarios were hypothesized to explain this unusual behavior: (1) 133P is a classical comet from the outer solar system that has evolved onto a main-belt orbit, or (2) 133P is a dynamically ordinary main-belt asteroid on which subsurface ice has recently been exposed. If (1) is correct, the expected rarity of a dynamical transition onto an asteroidal orbit implies that 133P could be alone in the main belt. In contrast, if (2) is correct, other icy main-belt objects should exist and could also exhibit cometary activity. Believing 133P to be a dynamically ordinary, yet icy main-belt asteroid, I set out to test the primary prediction of the hypothesis: that 133P-like objects should be common and could be found by an appropriately designed observational survey. Description: This table details the dynamical and physical properties of the objects observed as part of the Hawaii Trail Project, as well as the circumstances of each object's observation. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 153 657 Properties of objects imaged for the Hawaii Trail Project (HTP)
See also: B/astorb : Orbits of Minor Planets (Bowell+ 2009) B/comets : Database of the orbital elements of comets (Rocher, 2007) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 11 A11 --- ObjID Object ID code (YYYYMMDD_NN) 13- 18 I6 --- AstNum ? Numerical asteroid designation (if any) 20- 42 A23 --- AstName Asteroid name or provisional designation 44 I1 --- Nobs Number of separate observations of object 46- 50 A5 --- Type Target type (1) 52 A1 --- T [PO] Orbital element type (2) 54- 58 F5.3 AU a Semimajor axis length (3) 60- 64 F5.3 --- e Eccentricity (3) 66- 69 F4.2 deg i Inclination (3) 71- 74 F4.2 --- TISS Tisserand parameter (4) 76- 79 F4.1 --- VMAG Absolute magnitude (V-band) 81- 90 A10 "YYYY/MM/DD" UTDate Date of observation 92- 96 A5 --- Tel Telescope used (5) 98-101 F4.2 AU Hdist Heliocentric distance of object (6) 103-106 F4.2 AU Gdist Geocentric distance of object (6) 108-111 F4.1 deg phSun Solar phase angle (6) 113-116 F4.1 deg OrbAng Orbit plane angle (6) 118-122 F5.1 deg TrueAnom True anomaly (6) 124-127 F4.1 mag Rmag Measured apparent magnitude (R-band) 129-131 F3.1 mag e_Rmag Magnitude uncertainty (7) 133-136 I4 s ExpTime Total effective exposure time 138-141 I4 --- SNR Measured signal-to-noise ratio 143-146 F4.1 mag/arcsec2 DetLim Coma surface brightness detection limit 148-153 F6.4 10+6km-2 Cd/Cn Ratio limit of dust to nucleus (8)
Note (1): Target type as follows: Kari = Karin cluster asteroid Koro = Koronis family asteroid Low-i = Low-inclination asteroid Them = Themis family asteroid Veri = Veritas family asteroid Note (2): Orbital element type as follows: P = Proper elements from Asteroids - Dynamic Site (AstDyS) (Knezevic & Milani, 2003A&A...403.1165K; http://hamilton.dm.unipi.it/astdys/) O = Osculating elements from JPL's Solar System Dynamics Group's Small-Body Database (http://ssd.jpl.nasa.gov/sbdb.cgi) Note (3): Computed with respect to Jupiter using tabulated orbital elements Note (4): From JPL's Solar System Dynamics Group's Small-Body Database (http://ssd.jpl.nasa.gov/sbdb.cgi) Note (5): Telescope codes as follows: CT1m = Cerro Tololo 1.0 meter telescope (Cerro Tololo, Chile) Gemn = Gemini North 8 meter telescope (Mauna Kea, Hawaii) Keck = Keck I 10 meter telescope (Mauna Kea, Hawaii) Lulin = Lulin 1 meter telescope (Lulin Mountain, Taiwan) SOAR = Southern Astrophysical Research 4.1 meter telescope (Cerro Pachon, Chile) Subr = Subaru 8 meter telescope (Mauna Kea, Hawaii) UH2.2 = University of Hawaii 2.2 meter telescope (Mauna Kea, Hawaii) Note (6): From JPL's Solar System Dynamics Group's Horizons online ephemeris generator (http://ssd.jpl.nasa.gov/horizons.cgi) Note (7): Approximate uncertainty in R-band magnitude of asteroid measured from observations, estimated to be 0.1mag if observed during clear conditions or ∼0.5mag if observed with cirrus present Note (8): Fractional scattering surface area of dust with respect to the nucleus cross-section
Acknowledgements: Henry Hsieh, h.hsieh(at)qub.ac.uk
(End) Henry Hsieh [Queen's Univ., Belfast], Patricia Vannier [CDS] 06-Aug-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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