Data Set Information
DATA_SET_NAME MSX SMALL BODIES IMAGES V1.0
DATA_SET_ID MSX-C-SPIRIT3-3-MSXSB-V1.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION Data Set Overview : This data set includes infrared images of small solar system bodies observed with the Spirit III instrument on the Midcourse Space Experiment (MSX). The data are reported in Kraemer et al. (2005). The images are in six bands as follows: Band: Ctrl. Wavelength: 50% peak int.: Array Size: NER*: FOV**: (microns) (microns) A 8.28 6.8 - 10.8 8 x 192 3.0E-11 1.06 B1 4.29 4.22 - 4.36 2 x 76 1.0E-09 1.4 B2 4.35 4.24 - 4.45 2 x 76 9.0E-10 1.4 C 12.13 11.1 - 13.2 4 x 192 2.0E-10 1.17 D 14.65 13.5 - 15.9 4 x 192 1.0E-10 1.13 E 21.34 18.2 - 25.1 2 x 192 3.0E-10 1.26 * Noise Equivalent Radiance in W/cm^2/sr ** Effective FOV (x 1.0E-08 sr) The detector pixels are square with a scale of 18.3 arcsec/pixel. The bodies were detected at such a low signal to noise in bands B1 and B2 that the images in those bands were not analyzed in Kraemer et al. (2005), but the B band data are included in this data set because they provide upper limits on the emission at 4 microns from the target objects. In this data set, B1 image filenames start with the letter F, B2 image filenames with a G, and filenames starting with B contain coadded B1 and B2. Image filenames for bands A, C, D, and E start with those letters respectively. Images are arranged in subdirectory by target. The instrumental response functions for each band are included in the subdirectory 'response'. The targets included are comets Hyakutake, Hale-Bopp, Tabur, 126P/IRAS 1, 22P/Kopff 1, 46P/Wirtanen 1, 125P/Spacewatch 1, and 55P/Tempel-Tuttle 1; transition objects 3200 Phaethon and 4015 Wilson-Harrington; and asteroids 4179 Toutatis and 4197 (1982 TA). (The authors define a transition object as one that has both asteroidal and cometary properties.) The observations were made during April 1996 through February 1997. Scan procedures were as follows. Fifteen 3.5 degree long raster legs were executed on each source at a rate of 0.05 degrees per second. This scan rate produced a sample rate of about 7 samples per dwell time on a detector. The scan was oriented to be parallel to the projection of the orbit of the comet on the sky. Each scan leg was offset in the cross-scan direction by about 100 arcseconds. Thus, the total area covered was 3.5 degrees in-scan and about 1.4 degrees cross-scan. A dark offset was measured every other scan, or about every 2.4 minutes. An additional radiance correction related to the temperature of the focal plane array was discovered and discussed in detail in section 4.3 of Price et al. 2004 (AJ 128, 889). The value of this correction factor is listed in the History section of the FITS header in each of the data files. For further information about the observations, see Kraemer, K.E., C.M. Lisse, S.D. Price, D. Mizuno, R.G. Walker, T.L. Farnham, and T. Makinen. MSX observations of small solar system bodies. Submitted to Astron. J., 2005. [KRAEMERETAL2005]
DATA_SET_RELEASE_DATE 2005-06-16T00:00:00.000Z
START_TIME 1996-07-24T02:40:30.850Z
STOP_TIME 1997-02-02T02:22:29.757Z
MISSION_NAME MIDCOURSE SPACE EXPERIMENT
MISSION_START_DATE 1996-04-24T12:00:00.000Z
MISSION_STOP_DATE 1997-02-26T12:00:00.000Z
TARGET_NAME 3200 PHAETHON
4015 WILSON-HARRINGTON
4179 TOUTATIS
ASTEROID 4197
CALIBRATION
125P/SPACEWATCH 1 (1991 R2)
126P/IRAS 1 (1983 M1)
22P/KOPFF 1 (1906 Q1)
46P/WIRTANEN 1 (1948 A1)
55P/TEMPEL-TUTTLE 1 (1865 Y1)
C/HALE-BOPP (1995 O1)
C/HYAKUTAKE (1996 B2)
C/TABUR (1996 Q1)
TARGET_TYPE ASTEROID
CALIBRATION
COMET
INSTRUMENT_HOST_ID MSX
INSTRUMENT_NAME SPATIAL INFRARED IMAGING TELESCOPE
INSTRUMENT_ID SPIRIT3
INSTRUMENT_TYPE UNKNOWN
NODE_NAME Small Bodies
ARCHIVE_STATUS ARCHIVED
CONFIDENCE_LEVEL_NOTE Confidence Level Overview : An estimate of the Celestial North Clock Angle (angle of celestial north from vertical in the images) has been added to the image labels for the convenience of the user. This is an approximate value.
CITATION_DESCRIPTION Kraemer, K., Lisse, C.M., Price, S., Mizuno, D., Walker, R.G., Farnham, T.L., and Makinen, T., MSX Small Bodies Images V1.0. MSX-C-SPIRIT3-3-MSXSB-V1.0. NASA Planetary Data System, 2005.
ABSTRACT_TEXT Eight comets, two transition objects, and two near-Earth asteroids were imaged in six infrared bands with the Spirit III instrument on the Midcourse Space Experiment (MSX). This data set contains the calibrated images.
PRODUCER_FULL_NAME CAROL NEESE
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