PSR B1257+12 D


PSR B1257+12 D

Extrasolar Planet
name = PSR B1257+12D
semimajor = ~2.6
period_year = ~3.5
ang_dist = 8.665
mass_earth = 0.0004
discovery_date = 2002
discovery_site = Poland
discovery_method = Pulsar Timing
discoverers = A. Wolszczan

PSR B1257+12D is a possible extrasolar planet approximately 980 light-years away in the constellation of Virgo. It is suspected that an asteroid or comet is orbiting PSR B1257+12 at an average orbital distance of 2.6 AU with an orbital period of approximately 3.5 years.

Originally, in 1996, a possible Saturn-like (100 Earth mass) gas giant was announced orbiting the pulsar at a distance of about 40 AU. However, the discovery was not conclusive and was later retracted. It is now thought that the signal came from an asteroidal or cometary body

The object is so small that it is not even considered to be a planet, but it is the first known extrasolar asteroid or comet akin to the objects in the Kuiper belt in our solar system. It is possible that this object is the largest member of a belt of minor objects around the pulsar.

External links

* http://www.extrasolar.net/planettour.asp?StarCatId=pulsar&PlanetId=238


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • PSR B1257+12 — Vue d artiste des planètes orbitant autour de PSR B1257+12 Données d observation (Époque J2000.0) Ascension droite 13h 00m 01s …   Wikipédia en Français

  • PSR B1257+12 A — Taille comparée de PSR B1257+12 A avec la Terre selon différents modèles de composition. Du plus petit au plus grand rayon : modèle de planète métallique pure, type tellurique à 67 % Fe, 32,5 % MgSiO3, aqueuse à 75 % H2O,… …   Wikipédia en Français

  • PSR B1257+12 — (a veces abreviado PSR 1257+12) es un púlsar que se localiza en la constelación de Virgo. Se encuentra aproximádamente a 980 años luz de la Tierra. Fue descubierto por el astrónomo Polaco Aleksander Wolszczan en 1990 usando el radiotelescopio de… …   Wikipedia Español

  • PSR B1257+12 B — Taille comparée de PSR B1257+12 B avec la Terre et Neptune selon différents modèles de composition. Du plus petit au plus grand rayon : modèle de planète métallique pure, type tellurique à 67 % Fe, 32,5 % MgSiO3, aqueuse à… …   Wikipédia en Français

  • PSR B1257+12 C — Taille comparée de PSR B1257+12 C avec la Terre et Neptune selon différents modèles de composition. Du plus petit au plus grand rayon : modèle de planète métallique pure, type tellurique à 67 % Fe, 32,5 % MgSiO3, aqueuse à… …   Wikipédia en Français

  • PSR B1257+12 D — Étoile Nom PSR B1257+12 Ascension droite 13h 00m 01s Déclinaison +12° 40′ 57″ Type spectral Pulsar Constellation Vierge …   Wikipédia en Français

  • PSR B1257+12 A — Planetbox begin name = PSR B1257+12APlanetbox image caption = An artist s impression of the radiated surface of PSR B1257+12A.Planetbox star star = PSR B1257+12 constell = Virgo RA = RA|13|00|01 DEC = DEC|+12|40|57 dist ly = 980 dist pc = 300… …   Wikipedia

  • PSR B1257+12 — Starbox begin name = PSR B1257+12 Starbox observe epoch = J2000.0 constell = Virgo ra = 13h00m01s dec = +12° 40 57 appmag v = ?Starbox character class = ? b v = ? u b = ? variable = Pulsar Starbox detail mass = assumed 1.4 radius = 0.00002… …   Wikipedia

  • PSR B1257+12 B — Planetbox begin name = PSR B1257+12BPlanetbox star star = PSR B1257+12 constell = Virgo RA = RA|13|00|01 DEC = DEC|+12|40|57 dist ly = 980 dist pc = 300 class = PulsarPlanetbox orbit semimajor = 0.36 eccentricity = 0.0186 ± 0.0002 period =… …   Wikipedia

  • PSR B1257+12 C — Planetbox begin name = PSR B1257+12CPlanetbox star star = PSR B1257+12 constell = Virgo RA = RA|13|00|01 DEC = DEC|+12|40|57 dist ly = 980 dist pc = 300 class = PulsarPlanetbox orbit semimajor = 0.46 eccentricity = 0.0252 ± 0.0002 period =… …   Wikipedia