The latest ultraviolet spectra from 2201 Oljato (taken up Oct
Concurrently, prejudice and you will flat-field frames along with exposures out-of an effective FeNe evaluation light for wavelength calibration and you will observations of a lot spectrophotometric basic stars and you will solar analogs was indeed acquired to allow brand new flux calibration and also the approximation of your continuum. The images was basically flux calibrated and you can upper limitations with the production rates of your about three radicals during the 2201 Oljato and you can P/Wilson-Harrington were calculated and you may compared. On the other hand, this new spectral reflectance of your own continuum as compared to a solar power analogue in the region anywhere between 3240 Angstroms and 6160 Angstroms would be discussed both for objects. Top of the limitations to your design rates of one’s OH significant deterrnined for everyone three things could be opposed and you may chatted about. Unfortuitously we cannot include a diagnosis of your continuum on ultraviolet, once the obvious magnitudes of one’s objects only have come between 18^meters and you can 17^meters and also the restricting magnitude to possess detection out-of continuum for the IUE was of purchase out of 10^yards.
The results would be plus discussed in view to requisite upcoming findings
The fresh new research from 2201 Oljato and you will 1566 Icarus that have Comet Wilson-Harrington, at which we know that it is at the least a dormant comet, suggests vow for clues towards concern whether or not 2201 Oljato and you may 1566 Icarus would-be extinct otherwise dormant cometary nuclei. Chamberlin A. B.* McFadden L. A good. Schulz Roentgen. Schleicher D. G. 2201 Oljato and you can 4015 Comet P/Wilson-Harrington: Seek CN (0-0) Ring Emission 2201 Oljato are an environment-crossing asteroid that have progressed from either area of the asteroid gear or even the reservoir away from small-months comets on their newest, dynamically erratic, planet crossing orbit. There clearly was both observational evidence of brand new asteroid’s bodily qualities (McFadden mais aussi al. Milani ainsi que al.
With this specific education, i produced size of these two stuff to look for CN emission, which is the really without difficulty noticed erratic kinds in comets. Ground-mainly based observations were made inside the October 1992 using Lowell Observatory’s step 1. Brand new CCD spectrograph try set up giving a great wavelength set of approximately 3240A in order to 6160A.
step one.10 Bien au respectively. A total of 16 exposures (20 minutes each) were pulled out-of 2201 Oljato. 4015 Comet P/Wilson- Harrington is actually seen sito sesso incontri ispanici for the 04, 06, 07, and you may 08 October 1992 blog post perihelion which have r-dot=
Asteroid 4015 1979 Va was discovered to be the same object because the comet P/Wilson-Harrington 1949 III of the Bowell (IAUC 5585)
A total of eleven exposures (20 minutes or so per) was indeed drawn out of 4015 Comet P/Wilson-Harrington. Extinction, flux calibration, and solar power analog famous people was basically seen on each evening. The brand new line density from CN try computed throughout the observed flux from the CN (0-0) band taking into consideration the newest fluorescence performance within geocentric distance, heliocentric distance, and you will heliocentric acceleration of each and every object. Finally, the fresh line densities is converted to CN design rates on the basis of your own Haser (1957) model. The outcome might be compared with development pricing observed in comets. Using flux calibrated spectra off 2201 Oljato and you can 4015 Comet P/Wilson-Harrington, we are going to split because of the a solar power analog spectrum to make cousin reflectance spectraparison so you’re able to before gotten reflectance spectra is made. REFERENCES: McFadden, L. A good., Cochran, An excellent.
L., Barker, Age. S., Cruikshank, D. P., Hartman, W. K. 1993. J. Geophys. Res. E2, pp. Milani, A beneficial. Yards. 1989. Icarus, -269. Meech K. J. Weaver H. A beneficial.* Zellner B. Noll K. S. Mass Losses Constraints from 5145 Pholus Both surface-based and you will Hubble Place Telescope (HST) photos of your Chiron-particularly asteroid 5145 Pholus have been acquired as a way to browse getting cometary hobby only past the perihelion amount of time in 1991 September. Ground-built observations have been made to your School off Hawaii 2. HST studies was in fact acquired towards the 19era (F555W, F785LP strain; 2400 sec complete visibility date through the F785LP filter and you can 900 sec total due to F555W). None a floor-situated neither HST photo show signs of coma. We’ll talk about the repair of your own HST photo utilising the Lucy-Richardson strategy and you can talk about the way the research was compared to the stellar profiles for both the floor-established and you can HST pictures.