... 2015 January 29 . Close Encounter with M44 . ... Explanation: On Monday, January 26, well-tracked asteroid 2004 BL86 made its closest approach, a mere 1.2 million kilometers from our fair planet. ... The remarkably pretty telescopic field of view includes M44, also known as the Beehive or Praesepe star cluster in Cancer. Of course, its close encounter with M44 is only an apparent one, with the cluster nearly along the same line-of-sight to the near-earth asteroid. ... About APOD | ...

Close Encounter with M44 . ... Credit Copyright: Carlo Dellarole, Andrea Demarchi Explanation: On Monday, January 26, well-tracked asteroid 2004 BL86 made its closest approach, a mere 1.2 million kilometers from our fair planet. ... The actual distance between star cluster and asteroid is around 600 light-years. Still, the close approach to planet Earth allowed detailed radar imaging from NASA's Deep Space Network antenna at Goldstone, California and revealed the asteroid to have its own moon . ...

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... The package includes a new ``hybrid'' symplectic integrator capable of handling close encounters, described at the conference: The Impact of Modern Dynamics in Astronomy , Namur, Belgium (Chambers 1998). ... NRC Research Associate, NASA/Ames Research Center , Moffett Field CA, USA, planetary accretion, formation of the asteroid belt and extra-solar planets. ... G.Laughlin and J.E.Chambers (2002) Astronomical Journal, , in press. ... American Astron. ... Home page of planet hunters Marcy and Butler ....

... Exoplanets . ... Artists impression of the blue exoplanet. ... This exoplanet is located in the constellation of Vulpecula, the fox, a faint pattern inside the Summer Triangle.ТљТљ This planet is a not too distant 63 light years away so has been studied by space-based telescopes.Тљ Data collected from Hubbleт??s Imaging Spectrograph (STIS) when this planet moved behind its star showed that in the shadow of the star the light reflected from HD 189733b reduced into the blue part of the spectrum. ...

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . ... Publications of the ASP (PASP) . ... Planet-Building on the Grandest Scales . ... The extrasolar planets discovered to this time are believed to be giant gaseous planets similar to Jupiter and Saturn. ... This, together with the large masses of the extrasolar planets discovered to date, has led researchers to conclude that all the extrasolar worlds are giant gaseous planets similar to Jupiter and Saturn. ...

Pulkovo NEO Page . ... The main publications are: the Minor Planet Circulars, containing astrometric observations, orbits, ephemerides, new numberings and namings of asteroids and comets; the Minor Planet Electronic Circulars, supplying information on unusual minor planets (including NEOs) and new discoveries. http://neo.jpl.nasa.gov . ... Plenty of information on all NEAs, including their observations at numerous world observatories. http://spaceguard.iasf-roma.inaf.it/ . ...

... Bad Astronomy . ... Bitesize Astronomy . ... The Nine Planets . ... It isn't the first extrasolar planetary system to be discovered; the first planet outside our own solar system orbiting a normal Sunlike star was discovered in 1995. ... Still, this is the first solar system ever found besides our own to definitely have more than one planet. This is an important discovery: most people all along have been assuming that multiple planet systems exist, but we had never actually seen one. ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Astrophysics graduate student programs . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

My research efforts have focused on three areas which are: . More than 200 extrasolar planets have been discovered around relatively nearby stars, primarily through the Doppler line shifts owing to the reflex motions of their host stars, and more recently through transits of some planets across the face of the host stars. ... Gravitational microlensing provides a novel technique to look for planets around lens stars, and this is the only technique currently capable of detecting Earth-mass planets. ...

Physics of the outer atmosphere of the Sun and of stars along their evolutionary track . ... 2002, Mem. SAIt, in press (Proceedings XLVI Congresso Nazionale SAIT) . ... Star formation in the Vela Molecular Clouds V. Young stellar objects and star clusters towards the C-cloud . ... 2002, ApJ, in press . ... 2002, proceedings of the SFCHEM 2002 meeting "Chemistry as a Diagnostic of Star Formation", Waterloo, Canada . ... D.S. Shepherd, L. Testi, D.P. Stark . ... Star Formation Group . ...

... More on 51 Peg: . The discovery of a Jupiter--mass planet in orbit around the solar--type star 51Peg has been reported by Michel Mayor and Didier Queloz (Geneva Observatory) on October 6th at the 9th Cambridge workshop on "cool stars, stellar systems, and the sun" held at Florence (Italy). ... Recall that the measurements of radial velocity only yield v sin i which in turn gives us M sin i. For most values of i, sin i will be greater than 0.5 and this gives a mass estimate of 0.5 Jupiter masses. ...

PhD Thesis (PDF) . ... The evolution of stars and gas in galaxies. Observing the atomic neutral hydrogen (HI) 21 cm emission and radio continuum emission of galaxies. ... The goal of research is to quantify the neutral atomic hydrogen (HI) gas content galaxies as they evolve with time. ... Neutral atomic hydrogen gas produces a radio signal that can be used to directly measure the amount of gas present. ... USyd Summer Research Scholarship Report (PDF) . ... Research Topic Write Up (PDF) . ...

... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Mars . ... An artificial comet holds secrets to Earths life . ... Comet to make close flyby of Red Planet in October 2014 . ... COMETS | ... Comet C/2013 A1 (Siding Spring) will make a close approach to Mars in October 2014. ... During the close Mars approach, the comet likely will achieve a total visual magnitude of 0 or brighter, as seen from Mars-based assets. ... Only registered members of Astronomy.com are allowed to comment on this article. ...

... galaxies: bulges galaxies: clusters: general galaxies: clusters: individual: . ... star formation statistics stellar content structure Cosmology ( cosmology :) cosmic background radiation ( cosmology :) cosmological parameters cosmology : miscellaneous cosmology : observations cosmology : theory ( cosmology :) dark ages, reionization, first stars ( cosmology :) dark energy ( cosmology :) dark matter ( cosmology :) diffuse radiation ( cosmology :) distance scale ( cosmology :) early Universe (...

The NEW ATNF Pulsar Catalog . The EPN Data Archive (Local Mirror) . The Pulsar Planets Home Page . Table of pulsars in Globular Clusters . Catalog of Milky Way Globular Clusters (local copy) . Dave Green's Supernova Remnant Catalog (local copy) . ... VizieR Service (astronomical catalogs) . ... Pulsar Bibliographical Database . ... The Astronomical Journal . ... NAIC] [Astro Home] [Staff] [Observing] [Receivers] [ALFA] [RFI] [Data] [Memos] [Publications] [Calendar] [Contacts] . ...

THE SUBSYSTEMS OF THE MILKY WAY HALO. ... A catalogue of homogeneous fundamental astrophysical parameters for 145 globular clusters is composed on the base of the data of compilative catalogue by Harris (1997) and from another literature. ... In addition, it has large rotation velocity ( V rot =77?33 km/s), appreciable radial and vertical metallicity gradients equal by value, and has the oldest average age (subsystem of the old halo). ... Characteristic parameter of globular cluster subsystems. ...

... Structure of Data . ... Catalog . ... In SAI OCL Catalog, we introduce our work on investigation of the Milky Way system of open star clusters. The main goal of our study is a search for new clusters using huge surveys. 168 new clusters have been already discovered by us using J,H,Ks data from 2MASS point source catalog. ... For 141 new clusters, we found their physical parameters using J,H,Ks data from 2MASS catalog and, for a number of clusters, our UBVRI CCD observational magnitudes. ...

... 8, ``Celestial Mechanics'', 2002 Investigation of stability of NEAs orbital resonance motions by numerical methods L. E. Bykova Tomsk State University, Tomsk, Russia The problem of orbital stability of resonance Near­Earth asteroids (NEAs) is considered. Most of NEAs have multiple close approaches to the inner ma­ jor planets. ... The technique of the investigation of NEAs orbital stability has been devel­ oped by author on the basis of the construction of possible motion domains (R) of asteroids. ...

This service is intended as an aid to visually observing close-approaching asteroids. ... By clicking on the column headers for "Object Name", "Maximum Brightness", and "Maximum Angular Speed", you can sort the list by those fields. ... When This is the predicted time when the asteroid will be closest to the Earth. ... This field shows red if an asteroid comes as close as the moon. ... PHA (Potentially Hazardous Asteroid) This does NOT mean that this is going to hit the Earth. ...