Draugr (exoplanet)
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Exoplanet Draugr |
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| Comparison of Draugr with Earth | |
| Constellation | Virgin |
| Position equinox : J2000.0 |
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| Right ascension | 13h 00m 04.0s |
| declination | + 12 ° 40 ′ 56 ″ |
| Orbit data | |
| Central star | Lich |
| Major semi-axis | 0.19 AU |
| eccentricity | 0.0 |
| Period of circulation | 25.26 d |
| Further data | |
| Dimensions | 0.022 M ⊕ |
| distance | 710.0 ± 40.0 pc |
| method | Pulsar timing method |
| history | |
| discovery | Aleksander Wolszczan et al. |
| Date of discovery | 1992 |
Draugr ( PSR 1257 + 12 b also PSR 1257 + 12 A ) is an exoplanet orbiting the pulsar Lich . Due to its low mass , it is assumed that it is a terrestrial planet - the size of a dwarf planet . It is one of the lowest-mass known planets outside the solar system (as of July 2018).
discovery
Unlike the majority of all exoplanets, this one was discovered using the pulsar timing method . The extrasolar planet was discovered by Aleksander Wolszczan in 1992 and confirmed by other researchers.
Circulation and mass
The planet orbits the pulsar Lich every 25.26 days , at a distance of about 0.19 astronomical units with an eccentricity of 0 percent and has a mass of about 1.329 · 10 23 kilograms (0.0222481 masses of the earth ). Its radius is estimated to be 2,200 kilometers.
Web links
Commons : PSR B1257 + 12 A - Collection of pictures, videos and audio files
Individual evidence
- ↑ a b c d e f g The Extrasolar Planet Encyclopaedia - PSR 1257 + 12 b. Retrieved December 18, 2015 .
- ^ The Extrasolar Planet Encyclopaedia - Catalog Listing. Retrieved July 1, 2018 .