PSR B1257+12 C

PSR B1257+12 C

Planetbox begin
name = PSR B1257+12C
Planetbox star
star = PSR B1257+12
constell = Virgo
RA = RA|13|00|01
DEC = DEC|+12|40|57
dist_ly = 980
dist_pc = 300
class = Pulsar
Planetbox orbit
semimajor = 0.46
eccentricity = 0.0252 ± 0.0002
period = 98.2114 ± 0.0002
ang_dist = 1.533
long_peri = 108.3 ± 0.5
t_peri = 2,449,766.5 ± 0.1
semi-amp = ?
Planetbox character
mass = 0.012 (± 0.0006)
mass_earth = 3.9 ± 0.2
Planetbox discovery
discovery_date = 22 January 1992
discoverers = Aleksander Wolszczan
discovery_method = Pulsar Timing
discovery_site = flag|Poland
discovery_status = Published

PSR B1257+12C is an extrasolar planet approximately 980 light-years away in the constellation of Virgo (the Virgin). PSR B1257+12C was one of the first planets ever discovered outside the Solar system, and is currently the third object known to be orbiting the pulsar PSR B1257+12. The planet is nearly four times as massive as the Earth.

Name

It should be noted that the planets of PSR B1257+12 are designated from A to D (ordered by increasing distance). The reason that these planets are not named the same as other extrasolar planets is mainly because of time. Being the first "ever" planets discovered, and being discovered around a pulsar, the planets were given the uppercase letters "B" and "C" (like other planets). When a third planet was discovered around the system (in a closer orbit then the other two), the name "A" was commonly used. 51 Pegasi b (the first planet found around a Sun-like star), paved the way of naming planets. Though these pulsar planets were not renamed, some have taken the liberty to do it themselves.

See also

* PSR B1257+12A
* PSR B1257+12B
* PSR B1257+12D

External links

*
*
* [http://www.astro.psu.edu/users/alex/pulsar_planets.htm Pulsar Planets]


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  • 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 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. WolszczanPSR B1257+12D is a possible… …   Wikipedia

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