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J/A+A/527/A42       Photometry of asteroid (21) Lutetia      (de Leon+, 2011)

Photometric and spectroscopic observations of asteroid (21) Lutetia 3 months before the Rosetta fly-by. de Leon, J., Duffard, R., Lara, L.M., Lin, Z.-Y. <Astron. Astrophys. 527, A42 (2011)> =2011A&A...527A..42D
ADC_Keywords: Minor planets ; Photometry, sequences Keywords: minor planets - asteroids: general - methods: observational - techniques: photometric - techniques: spectroscopic Abstract: On its journey to comet 67P/Churyumov-Gerasimenko, the International Rosetta Mission (ESA) was planned to fly-by two asteroids: (2867) Steins and (21) Lutetia. Although classified as an M-type asteroid because of its high albedo, its reflectance spectrum in the near and mid-infrared region, suggests a primitive composition, more typical of C-type asteroids. Results from ground-based observations are indicative of compositional variegation and of at least one significantly large crater on the surface of this asteroid. We analyse photometric and spectroscopic data of the asteroid, obtained from ground-based observations, to support the data taken by the spacecraft. Description: Table 2 shows relative magnitude of asteroid (21) Lutetia computed from broad-band R photometric images taken with the 1m telescope at Lulin observatory, Taiwan. The data was obtained during three different nights on March, 2010. Zero rotational phase was chosen to occur at JD = 2455273.3094 (March 17 at 19:25 UTC). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 31 306 Julian dates, phases and relative magnitudes of the combined lightcurve presented in Figure 4 for asteroid (21) Lutetia
See also: J/A+A/521/A19 : 21 Lutetia UBVRI light curves (Lamy+, 2010) Table: -------------------------------------------------------------------------------- Planet Name H Diam i e a mag km deg AU -------------------------------------------------------------------------------- 21 Lutetia 7.35 7.35 3.063841 0.16287028 2.43565549 Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 12 F12.4 d JD Julian Date (1) 14- 18 F5.3 --- Phase Rotational Phase 20- 25 F6.3 --- Dmag Relative magnitude 27- 31 F5.3 --- e_Dmag Error in relative magnitude
Note (1): Date of the observation: * 19/03/2010: JD 2455275.0164 to 2455275.3253 * 20/03/2010: JD 2455275.9849 to 2455276.2818 * 21/03/2010: JD 2455276.9837 to 2455277.2902
Acknowledgements: J. de Leon, jleon(at)iaa.es
(End) J. de Leon [Inst. Astrof. Andalucia, Spain], P. Vannier [CDS] 13-Dec-2010
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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