martes, 28 de octubre de 2014
Hi all, I just made a small analysis of the visual light curve borisov comet C / 2014 Q3, few visual observations of the comet, but there are two conclusions: 1 Date of outburts, October 19 2 increase or variation in brightness of the 3 visual magnitudes The main hypothesis in this type of glitter explosions as fast, from one day to another, is a sudden outburst of gas and dust from the same core, constant brightness trend these days would indicate that the comet keeps this activity because a significant level blast volatile ices and dust in the same nucleus, green images confirm this fact.
domingo, 24 de agosto de 2014
sábado, 12 de julio de 2014
viernes, 4 de julio de 2014
miércoles, 25 de junio de 2014
SOLAR AND HELIOSPHERIC OBSERVATORY/SOLAR WIND ANISOTROPIES OBSERVATIONS OF MODERATELY BRIGHT COMETS: 1999–2014
The author J.P.Navarro Pina investigated the recient observations of SOHO / SWAN of Observations of hydrogen Lyman-α (Ly-α) at 1215.7 Å in comets and their interpretation are important. Atomic hydrogen is the most abundant species in the atmosphere (or coma) of a comet being produced in a photodissociation chain originating with water molecules and including intermediate OH radicals. Water is the most abundant volatile species in a comet’s nucleus, and water sublimation controls the abundance and activity of the coma when comets are within 3 AU from the Sun. Measurements of the abundance and distribution of hydrogen in the coma, when appropriately modeled, can provide a reliable measure of the water production rate and its variation in time in comets. Virtually all compositional information is compared to water, making water the most important species for obtaining accurate production rates. Variations in production rate with time generally, and with heliocentric distance in particular can provide information about the composition and structure of the nucleus. nucleus. Solar Wind Anisotropies (SWAN), the all-sky hydrogen Ly-α camera, has been operating on the Solar and Heliospheric Observatory (SOHO) spacecraft since its launch in 1995. The SWAN instrument was designed to observe the entire sky in H Ly-α in order to obtain a global view of the variable interaction of the solar wind with the neutral interstellar hydrogen streaming through the solar system. From its viewpoint at the L1 Lagrange point between the Earth and Sun it obtains an unparallel view of the Sun, its large extended corona, and the entire sky. For a more detailed description of SWAN, see Bertaux et al.
sábado, 17 de mayo de 2014
A catalog of a sample of 225 periodic comets is presented with our ``best estimates'' of their absolute nuclear magnitudes HN = V(1,0,0). It includes either Jupiter family (JF) comets (defined as those with Tisserand constants T > 2 and perihelion distance inside Jupiter q < QJ), Halley-type comets (T < 2) and a few Centaurs comets (T > 2 and perihelion distance outside Jupiter q >QJ). DOWNLOAD HERE ( 560 KB ): https://www.dropbox.com/s/ajsuz5w263oxzr1/new%20Catalog%20of%20Nuclear%20Magnitudes.pdf
viernes, 2 de mayo de 2014
I just finished my last differential analysis curve ccd light based in more of 2.800 ccd's observations from MPC IAU , the light curve reduced the comet mred-log r sample 3 laws of different brightness due to the change of the strong component of the predominant chemical volatile comet, CH4 -> CO-> H2O in the heliocentric range 2.5
H2O, my analysis does not show favorable data regarding the brightness of the comet and I have doubts that it displays bright, my statistical analysis shows a 80% chance of not exceeding magnitude m1 = +8, and 20% to m1 = +6, ICQ gives m1 = 8.5 theoretical and actual visual observations really it 9.5-10.5