Q528
Sign in to saveAlso known as PSR 1257+12, Lich, PSR1257+12
pulsar located around 2300 light-years from the Sun in Virgo constellation
Key facts
- Constellation
- Virgo
- Right ascension
- 13 00 03.1075
- Declination
- +12 ° 40 ′ 55.155 ″
- Evolutionary stage
- Pulsar
via Wikipedia infobox
Wikidata facts
- Distance from Earth
- 710
- Mass
- 0.012
- Orbital period
- 98.2114
- Image
- Artist's concept of PSR B1257+12 system.jpg
Show 16 more facts
- time of discovery or invention
- 1990-01-01
- catalog code
- PSR J1300+1240
- right ascension
- 195.01294792
- declination
- 12.68198750
- parallax
- 1.41
- name
- Lich
- Commons category
- PSR B1257+12
- age estimated by a dating method
- 1
- right ascension component of proper motion
- 46.44
- declination component of proper motion
- -84.87
- spectral class
- PSR
- orbital inclination
- 47
- orbital eccentricity
- 0.0252
- semi-major axis of an orbit
- 0.46
- time of periapsis
- 2449765.5
- argument of periapsis
- 108.3
Sources (2)
via Wikidata · CC0
~7 min read
Article
PSR B1257+12, alternatively designated PSR J1300+1240, is a millisecond pulsar, 2,300 light-years (710 parsecs) from the Sun, in the constellation Virgo, rotating at 160.8 times per second (faster than the blade of a blender). It is also named Lich, after a powerful, fictional undead creature.
The pulsar has a planetary system with three known pulsar planets, named "Draugr" (PSR B1257+12 b or PSR B1257+12 A), "Poltergeist" (PSR B1257+12 c, or PSR B1257+12 B), and "Phobetor" (PSR B1257+12 d, or PSR B1257+12 C). They were both the first extrasolar planets to be discovered and the first pulsar planets to be discovered—B and C in 1992 and A in 1994. A is the lowest-mass planet yet discovered by any observational technique, having somewhat less than twice the mass of Earth's moon.