sábado, 21 de diciembre de 2013

COMET ISON IS DEAD

On December 18, 2013, the Hubble Space Telescope tried to observe Comet ISON one last time. As many people expected, there is no evidence of Comet ISON in these images. The above image shows a composite of Hubble's observations. If there had been a feature that appeared in all of the images at the same place, that would have been very strong evidence of the comet. But all of the features in these images are not repeated at the same place from image to image. Nothing that appears in the images looks like a piece of a comet. Mostly what shows up are stars that are moving across the frame as the telescope tracks the comet's expected position, and a few galaxies, also trailed. Other features are well-known artifacts produced within the camera, reflected and scattered light from brighter stars, and cosmic rays, which cause bright streaks across the images. Each of the four panels is a combination of two separate exposures. Had Comet ISON actually been present, it would have shown up in the same location in two or more of these frames. These two images are composites of several exposures each, with Hubble pointing at two different positions. The images have been combined so that features not at the same place in the various images are suppressed. Any comet fragments would show up more clearly in this composite, though stars still show up as faint streaks. There was some uncertainty in where Hubble should point to recover the comet because no observations showed the comet since soon after perihelion. According to astronomer Hal Weaver, who devised Hubble's strategy, there were two likely locations of the comet, predictions based on previous positions measured when the comet was still visible. Dr. Weaver also estimates that the faintest objects Hubble could see in these images would be about 25th magnitude. This means that Hubble could have seen comet fragments larger than about 500 feet (160 meters) in diameter. We can't completely rule out the possibility that something is left of the comet. After all, it was seen after its passage close to the Sun, but disappeared not long after. This material would still exist, but is likely very diffuse gas, dust, and very small pieces spread over an extremely large area. Notice complete here : http://hubblesite.org/hubble_discoveries/comet_ison/blogs/breaking-news-comet-ison-is-still-dead

viernes, 15 de noviembre de 2013

SPECTRA OF COMET C/2012 S1 ISON

ISON spectrum 300 l/mm (A/P=4.2). Background subtracted (20x20 binning). The ISON looks more NH2 prominent than C2 , Author : Vikrant Kumar ( Member of Cometary Investigation Astrophysics Group CIAG FB ), the comet show emission lines of CN , CO+, OH , NH , CH+ .. , the comet ison is rich in volatiles ices of ammonium , water , and HCN .

lunes, 11 de noviembre de 2013

SPECTRUM OF COMET C/2013 R1 LOVEJOY

Credit image : Vikrant Kumar , Comet Love Joy (C2013 R1) spectral analysis, 10.11.13, 02:20AM. see more lines 3079 1 #OH+ 3162 1 #CN+ 3210 1 #OH+ 3254 1 #CO2+ 3264 1 #CN+ 3317 1 #NH 3360 1 #NH 3370 1 #NH 3378 1 #CO2+ 3584 1 #CO/N2/N2+ 3589 1 #CO+ 3590 1 #CN 3597 1 #CO+ 3781 1 #CN 3883 1 #CN+/CN* 3954 1 #CH+ 3963 1 #CH+ 3976 1 #CH+ 3914 1 #N2+ 4056 1 #C3 4217 1 #CN 4231 1 #CH+ 4239 1 #CH+ 4254 1 #CH+ 4233 1 #CH+ 4238 1 #N2+ 4250 1 #CO+ 4257 1 #CO+ 4300 1 #CH 4310 1 #CH 4380 1 #C2 4738 1 #C2 4745 1 #C2 4753 1 #C2 4723 1 #C2 4702 1 #C2 5140 1 #(CN)2 5165 1 #C2 5636 1 #C2 5980 1 #NH2 6060 1 #NH2 6122 1 #C2 6331 1 #NH2 6340 1 #NH2 6620 1 #NH2 6761 1 #CH 7699 1 #CN —

NASA IRTF WORKING FOR COMET ISON

One image at K (2.3microns) from the IRTf of ISON COMET ... Credit image of P.Yanamandra-Fisher ( CIOC_ISON & CIAG _FB)

domingo, 3 de noviembre de 2013

Lyman alpha emissions at 121.6 nm in the extreme ultraviolet from the hydrogen coma of a comets C/2012S1 , 2P/Encke and C/2013 R1 Lovejoy

Lyman alpha emissions at 121.6 nm in the extreme ultraviolet from the hydrogen coma of a comet must be monitored from outside earth's atmosphere. Spacecraft such as SOHO SWAN instrument and SWIFT UVOTS can see in Lyman alpha. Also the process of charge exchange generates X-Rays. Lyman alpha and X ray emission in comets has been observed in comets with SWIFT XRT, XMM-Newton, CHANDRA ACIS, ROSAT Deep Survey Camera HRI, Extreme Ultraviolet Explorer satellite (EUVE), Odin satellite, OGO-5 satellite, GALEX Near Ultraviolet (NUV), and Orbiting Astronomical Observatory (OAO-2). Stunning image SWAN / SOHO of the day October 29, 2013, which has captured the Lyman-Alpha emission in 121.6 nm of the 3 most visible comets now in the far UV, the image gives us scientific information about Crown H forming these comets coma due to the process known as fluorescence ionized atoms and molecules of H, N, C and O, namely the dissociation of H2O in OH and H, when sunlight falls on this, and in a roundabout way gives us information about the broadcast of the core sublimated water and decomposed by the solar wind, as you can see in my image processed, as much emission in the corona of H is in comet C/2013 LOVEJOY R1, followed by the 2 P / ENCKE, and finally the comet C/2012 S1 ISON which can be called the'' failed'' comet of the year unless post-perihelion surprises ... More information in Cometary Investigation Astrophysic Group FB ( CIAG_FB )

sábado, 26 de octubre de 2013

REAL RATE PRODUCTION OBSERVED WATER IN COMET C/2012 S1 ISON

Measuring volatiles abundances , D/H ratios , and spin temperatures in comet C/2012 S1 ISON

This image of spectrum of instrument NIRSPEC KECK TELESCOPE , from comet C/2012 S1 ISON , date 25/10/2013 , Waveblue 2,13 microns , Wavered 4.23 microns , belongs from program '' Measuring volatiles abundances , D/H ratios , and spin temperatures in comet C/2012 S1 ISON '' , below project and research , COMETARY INVESTIGATION ASTROPHYSIC GROUP FB . CREDIT : "This research has made use of the Keck Observatory Archive (KOA), which is operated by the W. M. Keck Observatory and the NASA Exoplanet Science Institute (NExScI), under contract with the National Aeronautics and Space Administration." Please also acknowledge the PI(s) of datasets that have been obtained through KOA. The Keck Observatory Archive (KOA) is a collaboration between the NASA Exoplanet Science Institute (NExScI) and the W. M. Keck Observatory (WMKO). NExScI is sponsored by NASA's Origins Theme and Exoplanet Exploration Program, and operated by the California Institute of Technology in coordination with the Jet Propulsion Laboratory (JPL).

domingo, 20 de octubre de 2013

SCIENTIFIC RESULTS OF THE COMET C/2012 S1 ISON THE HUBBLE SPACE TELESCOPE

Within the framework of cooperation of the draft study and research of comet C/2012 S1 ISON the astrophysicist, and member of the Investigation Cometary FB Astrophysic Jian-Yang Li | Planetary Science Institute, has published some scientific results of astronomical research comet C / 2012 S1 ISON : 1.- The dust coma is mostly composed of sub-µm-sized particles emitted at speeds of tens of meters per second. 2.- The A(θ)fρ, a quantity to measure the dust production rate, is 1339 and 1239 cm in the F606W and F438W filters, respectively, in apertures <1.6″ in radius. 3.- The dust colors are slightly redder than solar, with a slope of 5.0±0.2% per 100 nm, and increase to >10% per 100 nm 10,000 km down the tail. The color properties of ISON’s coma is similar to that of Comet Hale-Bopp. A sunward jet is about 1.6″ long, at a position angle of 291°, with an opening angle of ~45º. The shape and orientation of the jet does not change over 19 hours of our observations, suggesting a circumpolar jet. The jet indicates that the rotation pole is pointing within 30° of (RA, Dec) = (330°, 0°). There are two interesting implications from our observation: The existence of ice grains in the inner coma is the best explanation we could find for the change of color within the coma. The comet always faces the Sun with one side, and the other side is always in dark, therefore probably still retaining abundant supervolatiles (CO and/or CO2). This situation won’t change until the last week before perihelion. When the original night side is suddenly exposed to strong sunlight at within Mercury’s orbit, large outbursts might be triggered. While we are continuing our analysis, we were able to put an upper limit of the radius of the nucleus as 2 km from our images. The top image is the image of ISON taken by Hubble on October 9. The bottom image is an enhancement to reveal the non-symmetric structures in the coma, such as jet. Credit: NASA/ESA/Z. Levay The real color of comet ISON :

sábado, 12 de octubre de 2013

ANALYSIS OF THE LIGHT CCD CURVE OF COMET C/2012 S1 ISON

The author , J.P.Navarro , analyzes the 3589 ccd's observations from MPC database and obtained the new and the best light ccd curve for this comet , C/2012 S1 ISON , adjust the principal light ccd curve based in 3.589 observations ccd's and calculated for the differential analysis , two new photometricals laws , the best adjust is new mathematical method for the analysis , based in polynomial regression , the old method of calculation based in linear regression , donot fit properly , the new method of polynomial regression in order 2 or 3 correctly whether all points of the curve, in particular the kite has a curvature characteristic in its data get three new Photometric parameters, a, b1 and b2, the author has been linked to with absolute magnitude (m0) and b1 and b2 are new indicators of internal activity of the comet , the absence of more new settings for all curve data, the results indicate a deceleration typical brightness of new comets oort cloud, most likely due to a change in the main volatile component of the gas and dust sublimation the comet, this change occurred in 1.4 < r < 2.4 au . Reference : ''Estimates of masses , volumes , and densities of short-period comet nuclei'' , H.Rickman et at. 1987 .

miércoles, 9 de octubre de 2013

Comet C/ISON Details Emerge as it Races Toward the Sun

Scientists are unraveling more information on Comet C/2012 S1 (ISON) as it continues on its journey toward the Sun. Comet C/ISON will skim 730,000 miles above the Sun’s surface on Nov. 28 and has the potential to be readily visible from Earth starting in early December. “We measured the rotational pole of the nucleus. The pole indicates that only one side of the comet is being heated by the Sun on its way in until approximately one week before it reaches it closest point to the Sun,” said Planetary Science Institute Research Scientist Jian-Yang Li, who led a team that imaged the comet. “Since the surface on the dark side of the comet should still retain a large fraction of very volatile materials, the sudden exposure to the strong sunlight when it gets closer to the Sun than Mercury could trigger huge outbursts of material,” Li said. Li presented the findings today at the American Astronomical Society’s Division for Planetary Sciences 45th Annual Meeting in Denver. Comet C/ISON was imaged with the Hubble Space Telescope using the Wide Field Camera 3 on April 10. “We measured the color of the coma, and found that the outer part of the coma is slightly redder than the inner part,” Li said. “This color change is unusual in comets, and seems to imply that the inner part contains some water ice grains, which sublimate as they move away from the nucleus.” Comet C/ISON was discovered in September 2012 when it was farther away from the Sun than Jupiter, and was already active at such a great distance. This is distinct from most other sungrazers – comets that pass extremely close to the sun – that are only discovered and remain visible for at most several days when nearest the Sun. At such a close perihelion distance from the Sun, sungrazers are expected to be intensely heated by the Sun, and sublimate not only ice but also silicates and even metals, releasing a tremendous amount of dust. The expectation is high that Comet C/ISON will be much brighter and more spectacular than most other sungrazers when it puts on a show late this year. “As a first-time visitor to the inner solar system, Comet C/ISON provides astronomers a rare opportunity to study a fresh comet preserved since the formation of the Solar System,” Li said. “The expected high brightness of the comet as it nears the Sun allows for many important measurements that are impossible for most other fresh comets.” NASA and the Space Telescope Science Institute funded the project. Research Planetary Science Institute Research Scientist Jian-Yang Li , member of Cometary Investigation Astrophysic Group FB ( J.P. Navarro Pina , Administrator CIAG_FB ) This image shows the color change of Comet C/ISON's dust coma. The white dot at the center of the coma marks the location of the nucleus. ISON's dust coma appears to be less red near the nucleus than it is further away from the nucleus. Although the color change is actually very small, it could be an indication of relatively more water ice particles near the nucleus. Those icy particles evaporate, as they move outward, makes the coma appear redder. Credit: NASA, ESA, J.-Y. Li (Planetary Science Institute) and Hubble Comet ISON Imaging Science Team.

domingo, 6 de octubre de 2013

Current model photometrical visual of comet C/2012 S1 ISON

The current photometrical visual model of comet ISON show ~ 1.5 - 2 visuals magnitudes below the theorical my photometric model is based only on visual observations, my previous calculations of the dust production rate confirmed that the comet will not be as bright as expected, compute a maximum visual magnitude is very risky

jueves, 12 de septiembre de 2013

NAU-led team discovers comet hiding in plain sight

For 30 years, a large near-Earth asteroid wandered its lone, intrepid path, passing before the scrutinizing eyes of scientists while keeping something to itself: 3552 Don Quixote, whose journey stretches to the orbit of Jupiter, now appears to be a comet. The discovery resulted from an ongoing project led by researchers at Northern Arizona University using the Spitzer Space Telescope. Through a lot of focused attention and a little bit of luck, they found evidence of cometary activity that had evaded detection for three decades. “Its orbit resembled that of a comet, so people assumed it was a comet that had gotten rid of all its ice deposits,” said Michael Mommert, a post-doctoral researcher at NAU who was a Ph.D. student of professor Alan Harris at the German Aerospace Center (DLR) in Berlin at the time the work was carried out. What Mommert and an international team of researchers discovered, though, was that Don Quixote was not actually a dead comet—one that had shed the carbon dioxide and water that give comets their spectacular tails. Instead, the third-biggest near-Earth asteroid out there, skirting Earth with an erratic, extended orbit, is “sopping wet,” said NAU associate professor David Trilling. The implications have less to do with potential impact, which is extremely unlikely in this case, and more with “the origins of water on Earth,” Trilling said. Comets may be the source of at least some of it, and the amount on Don Quixote represents about 100 billion tons of water—roughly the same amount found in Lake Tahoe. Mommert said it’s surprising that Don Quixote hasn’t been depleted of all of its water, especially since researchers assumed that it had done so thousands of years ago. But finding evidence of CO2, and presumably water, wasn’t easy. During an observation of the object using Spitzer in August 2009, Mommert and Trilling found that it was far brighter than they expected. “The images were not as clean as we would like, so we set them aside,” Trilling said. Much later, though, Mommert prompted a closer look, and partners at the Harvard-Smithsonian Center for Astrophysics found something unusual when comparing infrared images of the object: something, that is, where an asteroid should have shown nothing. The “extended emission,” Mommert said, indicated that Don Quixote had a coma—a comet’s visible atmosphere—and a faint tail. Mommert said this discovery implies that carbon dioxide and water ice also might be present on other near-Earth objects. This study confirmed Don Quixote’s size and the low, comet-like reflectivity of its surface. Mommert is presenting the research team’s findings this week at the European Planetary Space Conference in London. Notice complete : http://news.nau.edu/nau-led-teams-discovers-comet-hiding-in-plain-sight/

jueves, 29 de agosto de 2013

PERIODOGRAM OF COMET C/2012 S1 ISON

I calculated the period of rotation of comet C/2012 S1 ISON , my calculations based in database from MPC ( IAU ) 3.058 ccd magnitudes ( T-N ), the periodogram type used is LOMB-SCARGLE , from NASA EXOPLANET PERIODOGRAM SERVICE , the results show rotation period of Prot= 7,996 hours , P = 0.333196 , this results coincide as diameter of comet of nucleus of 5 kms , based in data from SWIFT/NASA .

miércoles, 28 de agosto de 2013

LIGHT CCD CURVE OF COMET ISON C/2012 S1

Updated the light ccd curve of comet C/2012 S1 ISON , the curve shows a drop in brightness on the red line expected theoretical , i reduced to conversion formula visual to ccd , and the maximun brightness is possible ~ +3.5 in perihelion , based in 3058 ccd observations .

jueves, 18 de julio de 2013

Image of arc emission outburst dust of comet 29p

COMET 29P/ SW-1 image of arc emission outburst dust , processed by J.P.Navarro Pina . Credit image : SPITZER TELESCOPE Smog Check for Comets: Measuring cometary CO2, CO, and particulate emissions Category: solarSystem: cometsPI: Reach, William T We propose to measure the CO2, CO, and dust emission from a sample of comets. This study is in the spirit of the A'Hearn et al. compilation of the OH, C2, and dust production rates for 85 comets, wherein the only widely accepted, physically-based taxonomic types of comets were identified. Specifically, C-chain-poor comets, which are predominantly dynamically short-period comets that formed in the Kuiper Belt, are distinct from the C-chain-rich comets that tend to be long-period comets arriving from the Oort cloud and having formed formed in the Jupiter-Saturn region. Spitzer/IRAC observations are unique in their sensitivity to CO2 and CO gas. CO and CO2 have prominent spectral bands that fall within IRAC channel 2, while dust strongly dominates IRAC channel 1. Despite being the second and third most abundant compositions of cometary ice, their high abundance in the Earth's atmosphere makes ground-based observations exceptionally difficult.

miércoles, 17 de julio de 2013

Image from Infrared Telescope Spitzer of comet 67P/ target of probe ROSSETTA , processed and analysis by J.P.Navarro Pina Credit :Infrared Science Archive (IRSA) at the Infrared Processing and Analysis Center (IPAC), California Institute of Technology. Technical Data : Telescope: Spitzer CampaignId: 1444 (MIPS014400) Request Type: AOR Mode: MIPS Phot AORKEY: 28139776 Observer: Jessica Agarwal Target Name: Churyumov-Gerasimenko Program Title: CGTRAIL_C5 Program ID: 50650 AOR Title: mips_cgt_dma0_dec08_pr Observation Start: 2008-11-23 04:09:13.25 Observation End: 2008-11-23 04:26:48.641

WATER RATE PRODUCTION ISON COMET

Theorical graphical of water rate production C/2012 S1 ISON

sábado, 13 de julio de 2013

NEW IMAGE OF COMET C/2012 S1 ISON OF HUBBLE SPACE TELESCOPE

New image processed of comet C/2012 S1 ISON by J.P.Navarro Pina ( Team CIOC_ISON and Cometary Investigation Astrophysic G_FB ) , of credit original observing program: 13229 - Levay, Zolt - Space Telescope Science Institute Hubble Heritage imaging of Comet ISON , the new calculations of diameter of coma based in images of HUBBLE SPACE TELESCOPE , show Axis major 70.000 kms and axis minor 29.700 kms the original fit image have processed by Navarro Pina by software DS9 , the image of ISON's comet applied isophotes and false colour . Proposal Abstract: PI Zolt Levay (Space Telescope Science Institute) We propose a program to image Comet C/2012 S1 {ISON} in three phases with similar observations: early epoch, pre-perihelion, and post-perihelion. These observations are intended to complement other observing proposals to produce still imaging and small movies to maximize public engagement with this expected spectacular sky phenomenon.; click image for enlarge

domingo, 7 de julio de 2013

Search of Precession period of comet C/2011 L4 PANSTARRS

A search of periodicities ( precession period ) of comet C/2011 L4 PANSTARRS based in 302 visuals observations from ICQ , COMET OBS and OBSERVADORESCOMETAS ,processed by software of analysis NASA EXOPLANET ARCHIVE , the preliminar results indicate Power 25.14 , the possible firts period of 42 days , based in periodogram type Lomb-Scargle , in the range 10 < P precess < 50 days .

martes, 2 de julio de 2013

Image from HUBBLE SPACE TELESCOPE Imaging Polarimetry of the 2013 Comet ISON with ACS

Image from HUBBLE SPACE TELESCOPE of comet C/2012 S1 ISON processed and analyzed by J.P.Navarro Pina for CIOC_ISON and COMETARY INVESTIGATION ASTROPHYSIC GROUP_FACEBOOK CREDIT : Imaging Polarimetry of the 2013 Comet ISON with ACS: A Pre-Perihelion Study of the Heterogeneous Coma PI Dean Hines (Space Telescope Science Institute)

viernes, 28 de junio de 2013

IMAGE FROM HST OF COMET C/2012 S1 ISON .. NEW FILAMENTS DUST STRUCTURES

The image processed of ISON comet , show three possible dust structures of filaments in the exterior coma of comet . Comparison image of 17 P/Holmes show filaments interior of coma of comet .

domingo, 16 de junio de 2013

Gemini Observatory Captures Comet ISON

The three images on left are through an r-band filter only, and the color composite on right includes g, i, and r bands. All are integrated for 2 x 45 seconds with the February 4 image integrated for 2 x 75 seconds (increasing the comet’s apparent brightness). During the period of this sequence, the comet shined at about magnitude 15.5-16.5 in visible light. In these images north is up [need to flip image top/bottom] east is left, and the field-of-view is about 2.5 arcminutes across, which corresponds to about 270,000-290,000 miles (435,000-470,000 kilometers) at the distance of the comet. NASA’s Swift satellite and the Hubble Space Telescope (HST) have also imaged Comet ISON recently in this region of space. Swift’s ultraviolet observations determined that the comet’s main body was spewing some 850 tons of dust per second at the beginning of the year, leading astronomers to estimate the comet’s nucleus diameter is some 3-4 miles (5-6 kilometers). HST scientists concurred with that size estimate, adding that the comet’s coma measures about 3100 miles (5000 km) across. Color composite produced by Travis Rector, University of Alaska Anchorage. Credit: Gemini Observatory/AURA Composite , isophotes , analysis J.P.Navarro Pina ( Cometary Investigation Astrophysic Group_Facebook / NASA JPL )

martes, 4 de junio de 2013

IMAGE OF COMET 29P/SW-1 ( FAULKES TELESCOPE SOUTH 2 MTS )

Image of comet 29P/SW-1 from 2 mts Faulkes Telescope South , note the comet's coma in a spiral due to the rapid rotation of the nucleus . Date: Mon 03 June 2013, 09:41 UT Coordinates: 13:37:19.92, -21:34:59.88 Exposure: 180.0 s Credit: Image taken with Faulkes Telescope South operated by Las Cumbres Observatory Global Telescope Network Simulation of coma structure -- ( Sekanina , 1987 )