Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Ross_248> ?p ?o }
- Ross_248 abstract "Ross 248, also called HH Andromedae or Gliese 905, is a small star located approximately 10.30 light-years (3.16 parsecs) from Earth in the northern constellation of Andromeda. Despite its proximity to the Earth, this star is too dim to be seen with the naked eye. Ross 248 was first catalogued by Frank Elmore Ross in 1926 with his second list of proper motion stars.This star has about 12% of the Sun's mass and 16% of the Sun's radius, but only 0.2% of the Sun's luminosity. It has a stellar classification of M6 V, which indicates it is a type of main sequence star known as a red dwarf. This is a flare star that occasionally increases in luminosity. With high probability there appears to be a long-term cycle of variability with a period of 4.20 years. This variability causes the star to range in visual magnitude from 12.23 to 12.34. In 1950, this became the first star to have a small variation in magnitude attributed to spots on its photosphere.Long term observations of this star by the Sproul Observatory show no astrometric perturbations by an unseen companion. The proper motion of this star was examined for a brown dwarf or stellar companion orbiting at a wide separation (between 100–1400 AU) but none was found. A search for a faint companion using the Hubble Space Telescope Wide Field Planetary Camera revealed nothing, nor did a search with near-infrared speckle interferometry. However, none of these searches rule out a companion that is smaller than the detection minima.The space velocity components of this star in the galactic coordinate system are [U, V, W] = [–32.9 ± 0.7, –74.3 ± 1.3, 0.0 ± 1.4] km/s. The trajectory of Ross 248 will bring it closer to the Solar System in the future. In 1993 Matthews suggested that in about 33,000 years Ross 248 would be the closest star to the Sun, approaching within a minimum distance of 3.024 light-years (0.927 parsecs) in 36,000 years. However, it will recede thereafter and will again be further from the Sun than Proxima Centauri 42,000 years from now.The spacecraft Pioneer 10 is traveling on a path headed roughly in the direction of Ross 248, and is expected to come within 3.2 light-years (0.98 parsecs) of the star in 32.605 years. A spacecraft that escaped the Solar System with a velocity of 25.4 km/s would reach this star 37,000 years from now when the star is just past its nearest approach. By comparison, the Voyager 1 has an escape velocity of 16.6 km/s.".
- Ross_248 thumbnail Near-stars-past-future-en.svg?width=300.
- Ross_248 wikiPageExternalLink AladinPreview?-c=23+41+55.01%2B44+10+38.9&ident=V*+HH+And&submit=Aladin+previewer.
- Ross_248 wikiPageExternalLink sim-id?protocol=html&Ident=CSI%2B43-23394+2&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id.
- Ross_248 wikiPageExternalLink ross248.htm.
- Ross_248 wikiPageID "205671".
- Ross_248 wikiPageLength "17248".
- Ross_248 wikiPageOutDegree "51".
- Ross_248 wikiPageRevisionID "682968462".
- Ross_248 wikiPageWikiLink 1_petametre.
- Ross_248 wikiPageWikiLink 2MASS.
- Ross_248 wikiPageWikiLink Andromeda_(constellation).
- Ross_248 wikiPageWikiLink Apparent_magnitude.
- Ross_248 wikiPageWikiLink Astronomical_Unit.
- Ross_248 wikiPageWikiLink Astronomical_unit.
- Ross_248 wikiPageWikiLink Brown_dwarf.
- Ross_248 wikiPageWikiLink Category:Andromeda_(constellation).
- Ross_248 wikiPageWikiLink Category:BY_Draconis_variables.
- Ross_248 wikiPageWikiLink Category:Flare_stars.
- Ross_248 wikiPageWikiLink Category:Gliese_and_GJ_objects.
- Ross_248 wikiPageWikiLink Category:Local_Bubble.
- Ross_248 wikiPageWikiLink Category:M-type_main-sequence_stars.
- Ross_248 wikiPageWikiLink Category:Objects_named_with_variable_star_designations.
- Ross_248 wikiPageWikiLink Category:Ross_objects.
- Ross_248 wikiPageWikiLink Constellation.
- Ross_248 wikiPageWikiLink Declination.
- Ross_248 wikiPageWikiLink Flare_star.
- Ross_248 wikiPageWikiLink Frank_Elmore_Ross.
- Ross_248 wikiPageWikiLink Galactic_coordinate_system.
- Ross_248 wikiPageWikiLink General_Catalogue_of_Trigonometric_Parallaxes.
- Ross_248 wikiPageWikiLink Gliese-Jahreiss_catalogue.
- Ross_248 wikiPageWikiLink Gliese_Catalogue_of_Nearby_Stars.
- Ross_248 wikiPageWikiLink Henry_L._Giclas_catalogue.
- Ross_248 wikiPageWikiLink Hubble_Space_Telescope.
- Ross_248 wikiPageWikiLink Infrared.
- Ross_248 wikiPageWikiLink Interferometry.
- Ross_248 wikiPageWikiLink Light-year.
- Ross_248 wikiPageWikiLink List_of_nearest_stars.
- Ross_248 wikiPageWikiLink List_of_nearest_stars_and_brown_dwarfs.
- Ross_248 wikiPageWikiLink Luyten_Half-Second_catalogue.
- Ross_248 wikiPageWikiLink Main_sequence.
- Ross_248 wikiPageWikiLink Main_sequence_star.
- Ross_248 wikiPageWikiLink Milliarcsecond.
- Ross_248 wikiPageWikiLink Minute_and_second_of_arc.
- Ross_248 wikiPageWikiLink Parsec.
- Ross_248 wikiPageWikiLink Petametre.
- Ross_248 wikiPageWikiLink Photosphere.
- Ross_248 wikiPageWikiLink Pioneer_10.
- Ross_248 wikiPageWikiLink Proper_motion.
- Ross_248 wikiPageWikiLink Proper_motion_star.
- Ross_248 wikiPageWikiLink Proxima_Centauri.
- Ross_248 wikiPageWikiLink Red_dwarf.
- Ross_248 wikiPageWikiLink Right_ascension.
- Ross_248 wikiPageWikiLink Solar_luminosity.
- Ross_248 wikiPageWikiLink Solar_mass.
- Ross_248 wikiPageWikiLink Solar_radius.
- Ross_248 wikiPageWikiLink Space_velocity_(astronomy).
- Ross_248 wikiPageWikiLink Spectral_type.
- Ross_248 wikiPageWikiLink Sproul_Observatory.
- Ross_248 wikiPageWikiLink Star.
- Ross_248 wikiPageWikiLink Star_catalogue.
- Ross_248 wikiPageWikiLink Stellar_classification.
- Ross_248 wikiPageWikiLink Stellar_kinematics.
- Ross_248 wikiPageWikiLink Voyager_1.
- Ross_248 wikiPageWikiLink File:Near-stars-past-future-en.svg.
- Ross_248 wikiPageWikiLinkText "Ross 248".
- Ross_248 wikiPageWikiLinkText "Ross 248".
- Ross_248 absmagV "14.79".
- Ross_248 appmag "6.9".
- Ross_248 appmag1Passband "J".
- Ross_248 appmagV "12.29".
- Ross_248 bV "+1.92".
- Ross_248 class "M6 V".
- Ross_248 colwidth "30".
- Ross_248 constell Andromeda_(constellation).
- Ross_248 epoch "J2000".
- Ross_248 gravity "5.12".
- Ross_248 hasPhotoCollection Ross_248.
- Ross_248 luminosity "0.0018".
- Ross_248 mass "0.136".
- Ross_248 pError "0.72".
- Ross_248 parallax "316.72".
- Ross_248 propMoDec "–1,584".
- Ross_248 propMoRa "+111".
- Ross_248 radialV "–81".
- Ross_248 radius "0.16".
- Ross_248 rotationalVelocity "1.2".
- Ross_248 temperature "2799".
- Ross_248 uB "+1.48".
- Ross_248 variable Flare_star.
- Ross_248 wikiPageUsesTemplate Template:Abbr.
- Ross_248 wikiPageUsesTemplate Template:Convert.
- Ross_248 wikiPageUsesTemplate Template:DEC.
- Ross_248 wikiPageUsesTemplate Template:Nearest_systems.
- Ross_248 wikiPageUsesTemplate Template:RA.
- Ross_248 wikiPageUsesTemplate Template:Reflist.
- Ross_248 wikiPageUsesTemplate Template:Starbox_astrometry.
- Ross_248 wikiPageUsesTemplate Template:Starbox_begin.
- Ross_248 wikiPageUsesTemplate Template:Starbox_catalog.
- Ross_248 wikiPageUsesTemplate Template:Starbox_character.