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Asteroid 909 Ulla

Alternate IDs:
1936 SJ, 1949 PW, 1966 DM, A912 CA, 1919 FA, 1949 OF1, 1966 BU

Data sets with data for Asteroid 909 Ulla:

Asteroid 909 Ulla (top)

24-Color Asteroid Survey (1 data product)

thumbnail for data6/909ulla.tab


time: N/A      file: data6/909ulla.tab      dataset: 24-Color Asteroid Survey

This file contains the spectrum of the asteroid specified in TARGET NAME, as part of the 24-color Asteroid Survey.
Asteroid 909 Ulla (top)

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

LC PERIOD FLAG * Flag referring to the sidereal period given in the asteroid lightcurve parameters file, taking the following values: > - less than < - greater than D - no numeric value (see P_NOTE for details) S - sidereal period (default is synodic period) U - period uncertain This is not the same as ambiguous where one or more additional periods are reported. LC PERIOD NOTE * Note with further information about the period given in the asteroid lightcurve parameters file. 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.
LC PERIOD ERR * Error in the rotational period given in the asteroid lightcurve parameters file.
LC AMPLITUDE FLAG * A flag pertaining to the amplitude of the lightcurve in the asteroid lightcurve parameters file, given in AMP_MIN and AMP_MAX. < - less than > - greater than LC AMPLITUDE MINIMUM * Lightcurve amplitude minimum, in the asteroid lightcurve parameters file. In the cases where a range of amplitude is given, this is the lower limit of the range. For individual observations for which a single value of the amplitude is given, this field contains a null value.
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.
LC AMPLITUDE ERR * Error in the lightcurve amplitudes given in the asteroid lightcurve parameters file.
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 BINARY FLAG * Note regarding binarity in the asteroid lightcurve parameters file: ? - Possible, usually due to lacking mutual eclipse/occultation events B - Binary system M - Multiple system, more than two 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.
8.71 0.08 2 Gonano 1991
8.8 0.1 0.08 0.01 2 Behrend 2002web
8.73 0.13 0.24 3 Lagerkvist 2001
. S Fornasier 2011a
. N Veres 2015

Asteroid 909 Ulla (top)

Asteroid Taxonomy V6.0 (1 data product)

Asteroid 909 Ulla (top)

Eight Color Asteroid Survey V4.0 (2 data products)

Asteroid 909 Ulla (top)

IRTF Near-IR Spectroscopy of Asteroids V2.0 (1 data product)

thumbnail for clarketal2004/909_020928t052234.tab


time: 2002-09-28T05:22:34      file: clarketal2004/909_020928t052234.tab      dataset: IRTF Near-IR Spectroscopy of Asteroids V2.0

Asteroid spectrum obtained with SpeX at the NASA Infrared Telescope Facility (IRTF). Preprocessing of the SpeX data, as well as extraction of the 1-D spectrum and wavelength calibration was carried out using various tasks in IRAF. Telluric correction was achieved with IDL code that utilizes model atmospheric transmission spectra generated with ATRAN. Multiple solar-analog stars were used in calibrating this spectrum in units of relative reflectance. Spectrum has been normalized to 1.0 at ~ 1.215 microns (center of the J-band).

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