- 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 = 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 = PublishedPSR B1257+12C is an
extrasolar planet approximately 980light-year s away in theconstellation of Virgo (theVirgin ). PSR B1257+12C was one of the first planets ever discovered outside theSolar system , and is currently the third object known to be orbiting thepulsar PSR B1257+12 . The planet is nearly four times as massive as theEarth .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 planet s is mainly because of time. Being the first "ever" planets discovered, and being discovered around apulsar , 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 aSun -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
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PSR B1257+12A
*PSR B1257+12B
*PSR B1257+12D External links
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* [http://www.astro.psu.edu/users/alex/pulsar_planets.htm Pulsar Planets]
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